SCHEDULE –B1 - GUVNLguvnl.com/Tender/File/GSECL/Corporate Office/GEN_GP... · signature and seal of bidder 1 schedule –b1 technical specification for rerofitting of generator

Signature And seal of Bidder 1

SCHEDULE –B1

TECHNICAL SPECIFICATION

FOR

REROFITTING OF

GENERATOR PROTECTION RELAY SCHEME

OF UKAI HYDRO POWER STATION UNIT 1 TO 4

AND KADANA HYDRO POWER STATION UNIT NO.3 or 4


INDEX

SL. NO

CONTENT DESCRIPTION PAGE NOS.

1 SECTION I QUALIFYING REQUIREMENTS

FOR BIDDERS

3

2 SECTION II TECHNICAL SPECIFICATION 4

3 SECTION III ANNEXURES 31

4 SECTION IV TECHNICAL SCHEDULES 52


SECTION: I

QUALIFYING REQUIREMENT FOR BIDDERS

1. The bidder shall be original equipment manufacturer (OEM). The offered Relay have to

be designed, manufactured and tested as per relevant IS/IEC with latest amendments.

2. The minimum requirement of manufacturing capacity of offered type, size and rating of

Relays shall be five times of the tendered qty. The bidder should indicate manufacturing

capacity by submitting latest updated certificate of a Chartered Engineer (CE).

3. Relay / PROTECTION PANELS offered shall be of similar or higher rating and in service

for a minimum period of THREE (3) years and satisfactory performance certificate from

utilities like State Electricity Corporations, NTPC, PGCIL etc. in respect of this should be

submitted. The details shall be submitted in Schedule 5 for “Performance and Experience

Detail “

3. Bidder shall submit Details of orders for similar nature/jobs carried out along with

documentary evidence, performance certificate and their organization set up for such work

executed in past there years indicating the names of the organizations, order no and date.

4. The bidder should clearly indicate the quantity and single value contract executed during last

five (5) years for the offered product. Bidder should have executed one single contract

during last five years for the quantity equivalent to bid. The details should be submitted as

per format in Schedule 6 “Largest Quantity order Executed Details. “

5. Relay / PROTECTION PANELS offered shall have type test certificates from accredited

laboratory (accreditation based on ISO/IEC/Guide 25/17025 or EN 45001 by the national

accreditation body of the country where the lab is located.) as per IS/IEC/Technical

specification, not older than FIVE (5) years from the date of opening of technical bid.

6. The bidder shall guarantee for supplying maintenance spares and services as well as

repairing of relays for a period of the life expectancy of 15 years.


SECTION II

TECHNICAL SPECIFICATION

CONTENTS

Sr. No.

DESCRIPTION PAGE NO.

1.00.00 Intent Of Specification 05

2.00.00 Scope 05

3.00.00 Schedule Of Requirement 07

4.00.00 Standards 07

5.00.00 Climatic Conditions 08

6.00.00 General Description of the Project. 08

7.00.00 General Technical Requirement: - Panel 09

8.00.00 General Technical Requirement:-Relays 13

9.00.00 General Technical Requirement:-SCADA 14

10.00.00 Details Of Instrument Transformers, Power Transformers And Generator

15

11.00.00 Principal Technical Parameters 15

12.00.00 Tests 24 13.00.00 Inspection During Manufacturing 25

14.00.00 Quality Assurance Plan 25

15.00.00 Performance Guarantee 26

16.00.00 Deviation 26

17.00.00 Document Submission 26

18.00.00 Drawings / Data / Documents To Be Submitted By Bidder Along with The Bid

28

19.00.00 Drawings / Data / Documents To Be Submitted By Successful Bidder

28

20.00.00 Demonstration 28

21.00.00 Packing And Transport 28

22.00.00 Training 29

23.00.00 Supervisory Installation & Commissioning 30

24.00.00 Schedules 30

25.00.00 Guarantee For Maintenance Spares And Services 30 .


1.00.00 : INTENT OF SPECIFICATION

1.01.00 This specification is intended to cover design, engineering, manufacture, Fabrication ,

assembly, inspection and testing at manufacturer's works, packing & forwarding,

supply, delivery at Power House site, installation and commissioning of complete Pre

wired Generator Protection Relay Panel having Microprocessor base Numerical type

Generator & Transformer protection relay including required Trip relay , auxiliary

relay , TBs etc. in place of existing Generator relay Panel having Static and

Electromechanical relays provided for Generator Protection of Unit # 1 to 4 , at Ukai Hydro Power Station and Unit 3 or 4 of Kadana Hydro Power Station and

buyback of existing protection scheme at Ukai HPS as specified hereunder & as

given in the schedule of requirements. The scope also includes supply of spare set of

relays for protection of Generator , Generator Transformer and UAT similar to

supplied in above protection panels.

1.02.00 It is also intended to have Interfacing of relays and communication system for DR

work station application and SCADA application without control function for the

relays to be supplied for all units of Ukai Hydro station as mentioned in (1.01.00)

above. The DR work station should be able to communicate with all relays for DR

downloading, viewing, Parameterisation etc. The SCADA application should have

suitable software and interface for viewing status of field equipments like Isolators,

Circuit breakers etc. and viewing parameters in the Single line diagram graphic

prepared in the software supplied. No. of binary inputs for field equipments status will

be 250.

1.03.00 All drawings and Annexure appended to this specification shall form part of this

specification and supplement the requirement specified herein. The specification shall

be read and construed in conjunction with the drawings and annexure to determine the

scope of work and terminal points.

1.04.00 As existing relays have been phased out and spares are not available, it has become

necessary to replace existing relays with panel. Modification required in the existing

schemes / wirings, for matching of new numeric protection relay scheme including

design , programming , configuration , setting calculation , drawing preparation ,etc.

to suit the requirements of existing protection scheme shall be covered under scope of

contract. Proposed scheme depending on existing protection requirement have

been indicated at Annexure IIIB & VIII-B , however bidder will study the existing scheme and accordingly may offer scheme as per offered relay architecture provided the scheme should cover all the functions / protection as per requirement considering CT/PT inputs indicated to have reliable scheme.

1.05.00 It is also intended to include complete relay application check and final relay settings

calculations to confirm suitability of new relays for the existing equipments to be

protected / existing relays both technically as well as dimensionally.

1.06.00 The bidder shall visit the site and get him acquainted with the actual requirements of

site prior to quoting rates. No claims for inadequate description of the scope shall be

entertained at a later date.

1.07.00 It is not the intent to completely specify all details of design and construction herein.

Nevertheless, the equipment and installation shall conform to high standards of

engineering design and workmanship in all respects and shall be capable of

performing continuous operation in a manner acceptable to the Purchaser. Reliability,

availability and maintainability are of the utmost importance to the Purchaser in the

design of the equipment described herein.

2.00.00 SCOPE OF BIDDER 2.01.00 The scope of supply shall include but not limited to FOR destination supply of Pre

wired Complete Panel with comprehensive numeric relays for Generator , Generator


Transformer and Unit Auxiliary Transformer protection including Numerical

Protection relay having sufficient no. of Binary Input & Out put and Analogue Input

channels, Auxiliary relay , Tripping relay , TBs , Wires , Indicators , Test Switches /

Sockets , Test plugs , Stabilising resistors , illumination , pushbuttons , earth links etc.

to provide total functionality of protection for Generator , Generator Transformer ,

UAT and integration of various functions in each unit as per existing and new

proposed protection scheme and logic.

2.02.00 Software & Hardware for communication with relay , required accessories , Binary

and Analogue input status and measurement interface cards & equipments , com

ports, connectors , networking accessories , cable , PC , suitable furniture for DR

work station and SCADA application (without control) referred above shall be part

of the scope of supply

2.03.00 The Bidder shall study the existing scheme of protection for Generator , Transformer , UAT and associated equipments and accordingly offer complete protection scheme of Protection covering all existing protections and additional functions as available in the offered numerical relays. There should be sufficient number of Analogue input, Binary Input, Binary Output to suit the requirement of protection function and logic. ( Proposed scheme depending on existing protection requirement have been indicated at Annexure IIIB & VIII-B , however bidder will study the existing scheme and accordingly may offer scheme as per offered relay architecture provided the scheme should cover all the functions / protection as per requirement considering CT/PT inputs indicated to have reliable scheme.) However final scheme and application will be decided after discussion with bidder during technical scrutiny of the offer.

2.04.00 The existing scheme of protection, CT, PT detail, Transformer detail etc. have been

furnished with this specification , however bidder should visit at each site to access

the requirement , quantum of work , scheme logic , location, dimension detail etc.

before submitting the bid. The bidder shall submit complete detail of the scheme to be

offered viz. relay, panel, configuration of scheme logic, protection function and

features etc. ( Note:- at Kadana HEP the generator is designed for operating on

Generator and Motor mode both , the same should be considered during setting )

2.05.00 The characteristics and relay setting ranges shall be decided by the bidder. During

detailed engineering, co-ordinated relay settings shall be worked out by the successful

bidder and the calculations/time-charts shall be submitted for approval to

Owner/Consulting Engineer.

2.06.00 Trip Matrix required for implementing various class tripping schemes shall be

provided by the Contractor and shall be indicated in block interlock diagrams to be

submitted.

2.07.00 The scope includes preparation and furnishing of settings , calculations , installation,

commissioning instructions and maintenance manual for all protections with all

operational feature/optional feature

2.08.00 The scope includes preparation and furnishing softcopy as well as hardcopy of four

sets of all types of as built drawings including schematic, internal external cable

connection drawings, wiring schedules, electrical internal circuits indicating

measuring points and measuring values, relay data sheet, relay setting calculation.

2.09.00 The scope includes supply of wires, lugs, connectors, screws, nut bolts etc required

for retrofitting and other accessories which are necessary for satisfactory operation of

complete relay scheme though not individually or specifically mentioned herein.

2.10.00 The disconnection of existing control wiring, indication, annunciation, CT, PT

connections from all the protection panels and removal of existing relays, wires,

terminal blocks etc. Removal and shifting of removed panel at place directed by

engineer in charge.

2.11.00 Installation of New panel in place of existing removed panel including shifting from

storage with required mounting hardware, blanking plates, Glands, earthing strip,

relevant fabrication etc. with covering of remaining portion of Cable trench.


2.12.00 The scope includes wiring/terminations, grounding etc and also wiring modifications

to include all logic as per existing protection scheme.

2.13.00 Supply and mounting of all equipment as specified in this specification together with

such auxiliary equipment and materials as required. The tenderer shall indicate

make, type and designation of all equipments in the bid. 2.14.00 Complete internal wiring of equipment and terminal blocks and wiring between

adjacent panels. Design and manufacture of relays and relay assemblies to meet the

requirement of various protection schemes, specified in this specification or not.

2.15.00 The testing and commissioning of modified and retrofitted control and relay panels

including testing and commissioning of relays for all functions/logics in totality and

furnishing of test certificates.

2.16.00 The scope includes Commissioning of additional features /logics other than existing

scheme as per requirement with accessories and auxiliary equipments if required.

2.17.00 Any defect arises in Panel , Communication equipments , Software , relay , auxiliary

relay and found defective during commissioning at site shall be replaced free of cost,

which include transportation also.

2.18.00 The scope includes to time synchronize the supplied relay with existing GPS.

2.19.00 The scope includes training to site engineers at supplier’s works and site free of cost.

The minimum no. of engineers for training at supplier’s works shall be five.

2.20.00 Any other works and supply which could not be specified above but are necessary to

complete the job shall be the responsibility of the bidders.

2.21.00 Keeping in view, the above scope of work, the bidder shall furnish sequence of

activities to be carried out to avoid / minimize the generation loss, likely to occur

during above works. The bidder shall note that above work shall be completed within

shut down period. The bidder shall also note that there may be uncertainty of

Shutdown due to grid exigency. However, no additional cost/ compensation on this

account shall be entertained.

3.00.00 SCHEDULE OF REQUIREMENT 3.01.00 The requirement of Panel, Relay and Communication network etc. to be supplied

against this specification and their required deliveries are given in Commercial Terms

and Conditions and also in the ANNEXURE-I 3.02.00 Delivery instructions shall be issued to the successful bidder after placement of orders

and after inspection and testing of Panels and relays at manufacturer’s works.

3.03.00 Recommended spares

The tenderer shall furnish in his offer, a list of recommended spare with unit rates for

PROTECTION PANELS that may be required for trouble free operation for a period of

10 years. The purchaser reserves the right of selection of items and quantities of these

spares to be ordered. The tenderer is bound to supply spares for maintenance as and

when required for service life of the protections as per clause No.24.00.00

3.04.00 Recommended tools, testing kits, test handles etc. The tenderer shall furnish in his offer a list of recommended testing kit, tools with unit rates for PROTECTION PANELS those may be required during testing and

commissioning of said panel, off line as well as on line testing. The purchaser reserves

the right of selection of items and quantities to be ordered.

4.00.00 STANDARDS 4.01.00 Unless otherwise specified elsewhere in this specification, all equipment and

materials shall be designed, manufactured and tested in accordance with the latest

revisions of Indian Standards or British Standards and International Electro-Technical

Commission (IEC) Standard available at the time of placement of order. The supplier

shall submit the copies of the relevant standards applicable to the relay.


4.02.00 Equipment meeting with any other standard, which ensures equal or better quality,

may be accepted. Where the equipment conforms to any other standard, the salient

points of difference between the standards adopted and the above standards shall be

clearly brought out in the tender. A certified copy of such standard in English version

shall be submitted along with the bid. 4.03.00 A list of applicable Standards is given in Annexure II

5.00.00 CLIMATIC CONDITIONS: 5.01.00 The climatic and isoceraunic conditions at site are given below:

5.02.00 The equipment offered shall be capable for continuous satisfactory operation under

the above conditions.

5.03.00 Since the equipment offered shall be used in the Hydro power station which is at the

Dam Location the offered equipment shall be suitable for polluted atmosphere.

5.04.00 Equipment covered in this specification shall be suitable for indoor installation.

6.00.00 GENERAL DESCRIPTION OF THE PROJECT: 6.01.00 The equipment specified herein will be installed at Ukai Hydro Power Plant and

Kadana Hydro Power Plant of Gujarat State Electricity Corporation Limited.

6.02.00 The site is located at Ukai Dam about 100 Kms. from Surat and Kadana Dam Located

at about 160 Kms from Vadodara.The nearest Railway Station is Songadh of Western

Railway from Ukai and Godhara from Kadana.

6.03.00 The Generation voltage is 11kV, which is stepped up to 220 kV by means of 3-phase

Power Transformers (GTs). The connection between generator terminals and GT

would be by means of bus-duct up to 11kV LT side terminals of GT.

6.04.00 The connections from the GTs to Take-off gantry would be by means of overhead

conductors. .There is one No. 11 kV /415 V Unit Aux. Transformer to cater auxiliary

load per unit.

6.05.00 The existing protective functions and other diagram/detail as shown below are being

appended to this specification for the guidance of the bidders, however, bidders are

advised to get themselves acquainted with actual inputs at site.

6.05.01 Ukai Hydro Power Station Unit 1 to 4

(i) Existing Protection Scheme at Annexure III-A

(ii) Proposed Protection Scheme at Annexure-III-B (iii) Existing Panel GA Drawings at Annexure IV

(iv) CT,PT and Relay Details at Annexure V

(v) Existing Relay settings at Annexure VI

(vi) Details of Generator , Generator Transformer & UAT at Annexure VII

a Maximum ambient temperature (º C) 50

a Maximum ambient temperature in shade (º C) 45

b Minimum ambient temperature in shade (º C) 03

c Maximum daily average ambient temperature (º C) 40

d Maximum yearly average ambient temperature (º C) 32

e Relative humidity (%) 10 to 100

f Average annual rain fall (mm) 1150

g Average number of thunder storms (days/year) 30

h Height above Sea level (Meters) Not exceeding 1000

i Maximum wind pressure (Kg/m2) 150

j Earth quake acceleration 0. 2 g to 0.3 g


6.05.02 Kadana Hydro Power Stations Unit 3/4

(i) Existing Protection Scheme at Annexure VIII-A

(ii) Proposed Protection Scheme at Annexure VIII-B

(iii)Existing Panel GA Drawings at Annexure IX

(iv) CT,PT Relay Details at Annexure X

(v) Existing Relay settings at Annexure XI

(vi) Existing Relay , CT & VT detail at Annexure - XII

(vii) Details of Generator , Generator Transformer & UAT at Annexure XIII

7.00.00 GENERAL TECHNICAL REQUIREMENTS: 7.01.00 PANEL:

7.01.01 Existing Generator relay Panel at Ukai Hydro Power station is of Duplex type with relay and control equipments together. The front side panel is having two compartments having control switches, indications, meters, some protective relays etc. and associated wiring. The rear side panel is having protective relays with associated wiring. The schematic of the existing panel is attached with this specification. Looking to site requirement the front side panels will not be removed but blanking plates shall be provided in place of removed relay. The rear panel having only protective relay shall be removed and new panel to be supplied at Ukai shall be designed to have matching dimension and colour shade with existing remaining panel and space available to house all required relays ,equipments , accessories etc. as specified in this specification for all four units of Ukai Hydro station.

7.01.02 Existing Generator relay panel at Kadana Hydro Power station is of Simplex type having two compartments. The schematic of the existing panel is attached with this specification. The existing complete panel shall be removed and the new panel to be supplied at Kadana shall be designed to have matching dimension and colour shade with exiting other panels to house all required relay , equipments , accessories etc. as specified in this specification for one unit of Kadana Hydro station.

7.01.03 The Panel Dimensions shall depend on site requirement and space available.

The details should be finalized during the engineering stage by the successful

bidder after getting approval from GSECL. 7.01.04 Panel shall be completely metal enclosed and shall be dust, moisture and

vermin proof to meet the requirement of IP 51 of IS: 2147.

7.01.05 The panel shall be free standing , floor mounting type , and shall comprise

rigid , welded structural frame enclosed completely with specially selected

smooth finished cold rolled sheet steel of thick ness not less than 3.0 mm for

load bearing members ( Front Panel , base frame , door frame) and 2.0 mm

for non load bearing members ( side panel , cubicle roof , door). There shall

be sufficient reinforcement to provide level surfaces , resistance to vibration ,

and rigidity during transportation and installation.

7.01.06 All doors and removable covers shall be gasketed all round with neoprene

gaskets, ventilating louvers with screen and filters.

7.01.07 Design, material selection and workmanship shall be such as to result in neat

appearance inside and out side with no weld, rivets or bolt heads apparent

from outside and with all exterior surface true and smooth.

7.01.08 Cable entries to the panel shall be from the screwed type removable bottom

plates of the panel

7.01.09 The panel should be completely wired and to be fixed with all accessories like

Relays , Auxiliary relays , TBs , ( Disconnecting type TBs with shorting


arrangement for CT , PT) , Earthing Bus , Terminal connection for CT – PT

cables, Switches , Illumination , space heaters , Power sockets , Connection to

Relays , Ethernet switch , Computer etc.

7.02.00 AUXILIARY SUPPLY:

7.02.01 The bidder will have to reconnect the existing AC / DC supply for Switches,

Panel illumination, space heater etc. and supplies for control and protections

of existing panels. 7.02.02 The relays shall be suitable for 220V (+10% to -15%) DC supply

7.03.00 PANEL INTERNAL WIRING

7.03.01 All wiring shall be carried out with 1100V grade single core multi strand

flexible copper conductor wires with HRPVC insulation and shall be flame

retardant, vermin and rodent proof. The current carrying capacity of wire

shall be adequate for the duty assigned to it considering short circuit

condition and shall have sufficient flexibility to facilitate proper termination

at any location. Colour coded wires (red, yellow, blue, black) shall be used

for CT, VT and CVT secondary connections. The copper conductor used for

internal wiring be as follows:

a) All circuits except instrument transformer circuit of 1.5 Sq mm per lead

b) CT circuit - one 4 Sq mm per lead.

c) VT circuits one 2.5 Sq mm per lead.

d) Energy metering – 4 Sq mm per lead for both PT & CT circuits.

7.03.02 Auxiliary bus wiring for AC and DC supplies voltage transformer circuits,

annunciation circuits and other common circuits shall be provided near the

top of the panels running throughout the entire length of the panels.

7.03.03 The wire numbers shown in the wiring diagram shall be in accordance with

IS375/BS152/BS156. All wires directly connected to trip circuit breaker or

devices shall be distinguished by addition of a red colored or lettered ferrule.

Number 6 and 9 shall not be used.

7.03.04 Panel wiring shall be securely supported, neatly installed by lacing and tying,

readily accessible and connected to equipment terminals and terminal blocks.

Flame retardant, plastic wiring channels/troughs with strap on plastic covers

shall be used for this purpose. Sufficient space in channel for modification of

wiring shall be kept.

7.03.05 Accidental short circuiting of certain wires is likely to result in malfunction of

equipment, such as closing or tripping of a breaker or positive and negative

wires, these wires shall not be terminated on adjacent terminal blocks.

7.03.06 The unused space on the front or rear of the panels shall be kept clear of

wiring to facilitate addition of devices without rewiring associated portion of

the panels.

7.03.07 Wire termination shall be made with solder less crimping type of tinned

copper lugs which firmly grip the conductor. Insulation sleeves shall be

provided at all the wire terminations. Engraved core identification plastic

ferrules, marked to correspond with panel wiring diagram shall be fitted at


both ends of each wire. Ferrules shall fit tightly on the wire and shall not fall

off when the wire is disconnected from terminal blocks.

7.03.08 The bidder shall be responsible for the completeness and correctness of the

internal wiring and for the proper functioning of the connected equipment.

7.03.09 Terminations on T.B. shall be grouped function wise on one region of T.B.

(may not be full T.B) to take outlet connections in one cable for the function.

7.04.00 LABEL

7.04.01 All front mounted equipment as well as equipment mounted inside the panels

shall be provided with individual labels with equipment designation

engraved. The labels shall be mounted directly below the respective

equipment.

7.04.02 All the front mounted equipment shall also be provided tag numbers

corresponding to the ones shown in the panel internal wiring to facilitate each

tracing of wiring. These labels shall be mounted directly by the side of the

respective equipment and shall not be hidden by the equipment wiring.

7.04.03 Labels shall be made of Aluminum anodized plate P.V. Castings. Labels shall

have white letters on block background. All relays shall be given standard

abbreviation numbers with name of device, corresponding to the ones shown

in the panel internal wiring.

7.05.00 EARTHING

7.05.01 All metallic cases of relays, instruments and other mounted equipment shall

be connected to earth bus by copper wires of size not less than 2.5 sq. mm.

The colour of the earthing wire shall be green.

7.05.02 Looping of earth connections which would result in loss of earth connection

to other devices when the loop is broken shall not be permitted. However,

looping of earth connections between equipment to provide alternative paths,

to earth bus shall be provided.

7.05.03 VT, CVT and CT secondary neutral or common lead shall be earthed at one

place only. Such earthing shall be made through links, so that earthing may be

removed from one group without disturbing continuity of earthing systems

for other group.

7.05.04 A separate earthing point shall be provided in the panel for cable screens of

static equipment, insulation between two earths prior to connections of the

two earths to the Purchaser’s earthing grid, shall withstand a test voltage of

500V for 1 minute (or higher insulation resistance of not less than 1 meg-

ohms at 500V) connection between the screen terminals and the screen earth

– point shall be jumper wires. Connection of this earth point to the station

earth shall be carried out by Purchaser.

7.06.00 INDICATING LAMPS

7.06.01 Indicating lamps shall be of miniature switch board/LED type suitable for

panel mounting with series resistors preferably built in the main assembly to

avoid short circuiting of control supply in the event of short circuit of lamps.

The lamps shall be rated for 220VDC unless otherwise specified. Lamp

covers shall be of screwed type, unbreakable and moulded from heat resisting

material and shall be translucent to diffuse light & coloured as specified.

7.07.00 INTERIOR LIGHTING


7.07.01 The panel: shall be provided with fluorescent (CFL Lamp) lighting fixture

rated for 240V AC supply, controlled by panel door switch and fuse. The

number of such fluorescent lighting fixtures shall be 1 no. per panel.

7.07.02 The panel shall be provided with 240V, 50Hz. 15 A, 3 pin universal socket

with switch. The socket with switch shall be mounted inside the panel at

convenient location.

7.08.00 TERMINAL BLOCKS

7.08.01 Terminal blocks shall be 1100 V grade, 45 amps rated, one piece molded,

complete with insulated barriers, stud type, melamine housing brass

terminals, washers, brass nuts and brass lock nuts and identification strips.

Markings on the terminals strips shall correspond to wire number on the

wiring diagrams. Not more than 2 wires shall be connected to any terminals.

7.08.02 Terminal blocks for CT, CVT and VT secondary leads shall be provided with

test links and isolating facilities. CT secondary wiring should be such that it

can connect additional circuit in series.

7.08.03 All spare contacts and terminals of the panel mounted equipment and devices

shall be wired up to terminal blocks with ferrule numbers starting with U.

7.08.04 Unless otherwise specified, terminal blocks shall be suitable for connecting

the following conductors of purchaser’s cables on each side.

i) :All DC and auxiliary AC circuits -- minimum one of 2.5mm2 copper

ii) :All CT & PT circuits -- minimum two of 2.5mm2 copper

7.08.05 Moulding materials shall be self extinguishing or resistant to flame

propagation, substantially non hydroscopic and shall not carbonized when

tested for tracking. The insulation between any terminal and frame work

between adjacent terminals shall with stand test of 2kV RMS for one minute.

The molding shall be mechanically robust to withstand handling while

making terminations.

7.08.06 Easily removable Protective transparent plastic covers for placing over the

live parts of the terminal blocks shall be provided invariably.

7.09.00 PAINTING

7.09.01 All sheet steel work shall be phosphated in accordance with the following

procedures and in accordance with IS; 6005 `Code of Practice for

phosphating iron and steel’.

7.09.02 Oil, grease, dirt and swart shall be thoroughly removed by emulsion cleaning.

7.09.03 Rust and scale shall be removed by pickling with dilute acid followed by

washing with running water, rinsing with slightly alkaline hot water and

drying.

7.09.04 After phosphating, through rinsing shall be carried out with clean water

followed by final rinsing with dilute bi-chromate solution and oven drying.

7.09.05 The phosphate coating shall be sealed by the application of two coats of ready

mixed, stowing type zinc chromate primer. The first coat may be `Flash

dried’ while the second coat shall be stowed.

7.09.06 After application of the primer, two coats of finishing synthetic enamel paint

shall be applied, each coat followed by stowing. The second finishing coat

shall be applied after completion of tests.The panel/sheet shall have colour

confirming to shade of existing panel.

7.09.07 Each coat of primer and finishing paint shall be of a slightly aesthetically

pleasing appearance free from dirt and uneven surface.

7.09.08 The bottom plate shall be painted with an anti corrosive paint.

7.09.09 The paint thickness shall be 60-100 microns for powder coating.


7.10.00 MOUNTING 7.10.01 All equipment on front of panel shall be mounted flush

7.10.02 Relays shall be mounted such that removal and replacement can be

accomplished individually without interruption of service to adjacent

equipment.

7.10.03 No equipment shall be mounted on the doors without prior approval of the

purchaser.

8.00.00 GENERAL TECHNICAL REQUIREMENTS :RELAYS 8.01.00 The general requirements for the protective relays are described here under however;

all relays shall in general comply with the technical specifications mentioned under

clause 11.00.00 “Principal Technical Parameters”

8.02.00 All relays shall confirm to the requirements of Standards listed in Annexure II.

Equipments meeting any other authoritative standard, which ensures equal or better

quality than the standards mentioned shall also be acceptable. Equipment for which

Indian Standards are not available, the relevant British standards and IEC

recommendations will be applicable. Please attach photocopy of all such standards

according to which the equipment has been offered.

8.03.00 Relays shall be suitable for flush mounting on the front with connections from the

rear.

8.04.00 All protective relays shall be with proper on line testing facilities without isolation

from TB where inputs viz CT/ PT and DC are wired. All main relays shall be

provided with test plug to test the relay on line. Necessary test plugs/ test handles per

panel shall be supplied loose and shall be included in contractor’s scope of supply.

8.05.00 All AC operated relays shall be suitable for operation at 50 Hz. AC voltage operated

relays shall be suitable for 110V VT secondary and current operated relays for 1or 5

amps. CT secondary. All DC operated relays and timers shall be designed for the DC

voltage specified, and shall operate satisfactorily between 80% and 110% of rated

voltage. Voltage operated relays shall have adequate thermal capacity for continuous

operation.

8.06.00 Supervision relays having sufficient nos. of contacts for annunciation, blocking and

permissive function etc., to supervise healthiness of Auxiliary supply, PT supply, Trip

relay healthiness, Trip circuits shall form part of the scheme to be supplied.

8.07.00 The protective relays shall be suitable for efficient and reliable operation of the

protection scheme described in the specification. Necessary auxiliary relays and

timers required for interlocking schemes, multiplication of contacts, monitoring of

control supplies and circuits, lockout relay monitoring circuit etc. shall be provided.

8.08.00 All protective relays, auxiliary relays and timers except the lockout relays and

interlocking relays specified shall be provided with self-reset type contacts. All

protective relay and timers shall be provided with externally hand reset positive action

operation indicators with inscription. All protective relays, which do not have

8.09.00 Built-in hand-reset operation indicators shall have additional auxiliary relays with

operating indicators (flag relays) for this purpose.

8.10.00 No control relay which shall trip the power circuit breaker when the relay is de-

energized shall be employed in the circuits.

8.11.00 Any alternative/ additional protections or relays considered necessary for providing

complete effective and reliable protection shall also be included in the scope of

supply.

8.12.00 Provision shall be made for easy isolation of trip circuits of each relay for the purpose

of testing and maintenance.

8.13.00 The setting ranges of the relays offered, if different from the ones specified shall also be acceptable if they meet the functional requirements.


8.14.00 All relays and their drawings shall have phase indications as R-Red, Y-Yellow and B-

Blue.

8.15.00 Wherever numerical relays are used, the scope shall include the following:

8.15.01 The relay shall have Ethernet / USB / RS232 /optical port on front side

for communication with Laptop/Desktop and on rear side RS485 /

Ethernet / USB / fibre optic port shall be provided for rear

communication. Necessary converter for communication with PC /

Laptop shall be part of scope of supply.

8.15.02 Necessary licensed copy of software and hardware to up/ down load the

data to/from the relay from/to the personal computer installed in the sub

station shall be provided. Relay shall be looped by Fiber Optic/

twisted wire Cables up to PC (DR work station at Ukai hydro) 8.15.03 The relay shall have suitable communication interface on rear side for

the IEC 61850 standard for station communication.

8.15.04 The relay shall be supplied with IRIG port for time synchronisation with

GPS. The relay shall also have facility for time synchronisation through

binary input also.

8.15.05 The relay shall have sufficient no. of Analog Inputs for CT – VT of

suitable rating to include all protection functions intended in this

specification. Binary Input and Out put contacts

8.15.06 The software shall be suitable for operations like switching, retrieval of

information or changing of setting groups, retrieve oscillographic fault

data from the relay memory and to store fault record data as

oscilloraphic records in standard COMTRADE format. The software

shall be suitable to provide oscilloraphic data into several different

graphical representations that can be used to analyze the fault or event

captured by the relay. It shall also be possible to calculate additional

values from the captured signals and displaying analog curve with time

base phasor diagram locus diagrams, harmonic graphs etc. Automatic

upload of DR files should be possible.

8.15.07 The relay shall be supplied with all the original customized licensed

software, IO Cards, required cable for local or remote communication,

disturbance uploading, disturbance evaluation etc

8.16.00 All not used terminal shall also be provided with screws washers, lugs etc. as for used

terminal.

8.17.00 The type test offered for relay shall be supplied with full options of protection and

control functions mentioned in the catalogue.

9.00.00 GENERAL TECHNICAL REQUIREMENTS: SCADA SYSTEM for UKAI Hydro Station

9.01.00 At Ukai Hydro Station Unit 1 to 4 the Interfacing of all supplied relays with dedicated

PC shall be carried out. The relays shall be wired up with communication system for

DR work station application and SCADA application without control function.

9.02.00 The DR work station should be able to communicate with all relays for DR

downloading, viewing, Parameterisation etc. 9.03.00 The SCADA application should have suitable software and interface for viewing

status of field equipments like Isolators, Circuit breakers etc. and viewing parameters

in the Single line diagram graphic prepared in the software supplied. 9.04.00 The software should have OS window based platform. 9.05.00 The system should have event history recording and retrieving capability. 9.06.00 The time resolution for event recorded should not be more than 1 ms. 9.07.00 The protocol used should be open protocol for communication. If the protocol used is

of proprietary nature then use of Open protocol should also be possible without major

changes.


9.08.00 No. of binary inputs for field equipments (i.e. breaker, isolator, switches etc.) status

will be at least 250 for system. 9.09.00 No. of circuits for which metering parameters to be monitored in SCADA are 40 and

accordingly no. of analogue points shall be suggested by bidder. The bidder shall also

indicate clearly the method of connection, CT-PT input, required equipments etc. as

per site requirement. 9.10.00 Necessary PC, interfacing equipments, cable, Software, hardware & accessories,

furniture, panel etc. shall be part of this system.

9.11.00 Licensed version of software, Operating system, Office application, anti virus with

original media software shall be part of the supply.

9.12.00 Bidder should indicate exact detail of software and required hardware with its

features, facilities and application with offer.

9.13.00 The bidder should furnish configuration and specification of PC, Hardware,

interfacing equipments etc. with bid. The specification should be such as to suit the

existing requirement of the project; however the same will have to be approved from

GSECL before finalisation of requirement in detail order.

9.14.00 The software should have capabilities to create user defined graphics having desired

input configuration in the created screen depending on binary input.

9.15.00 The interfacing hardware & software should be expandable to suit addition of future

requirement of binary input.

9.16.00 Suitable capacity of UPS having one hour back up shall be supplied for SCADA

equipments and PC

9.17.00 The bidder should submit clear bill of material required for the proposed data

acquisition system with schematic and on basis of which requirement shall be

finalised in detail order.

9.18.00 All the equipment except field equipments, supplied should be properly housed in a

suitable IT rack or panel

9.19.00 Necessary cabling including supply for binary input for status shall not be in the scope

of bidder; however the successful bidder shall provide sufficient technical information

for the same during execution.

9.20.00 Required cable for communication from relay, interfacing panel, PC, networking

equipment etc. including supply , laying , termination shall be in the scope of bidder.

9.21.00 The bidder should demonstrate the offered scheme at site if demanded by purchaser.

9.22.00 Procurement shall be finalised on the basis of evaluation of performance and

applicability of the system for software and hardware offered.

10.00.00 DETAILS OF INSTRUMENT TRANSFORMRS, POWER

TRANSFORMRS AND GENERATOR. 10.01.00 The various detail of CTs, PTs, transformers and generators , existing scheme , relay

setting etc. for Ukai Hydro and Kadana Hydro Stations are attached at Annexure III to XIII

11.00.00 PRINCIPAL TECHNICAL PARAMETERS OF RELAY &

SCHEME. 11.01.00 The protective gear shall be as fast in operation as possible, so as to maintain the

maximum stability under fault conditions. The protective scheme shall provide

suitable protection for the individual equipment and at the same time ensure proper

operation of the entire protective system as a coordinated whole. Various protective

systems shall be designed to isolate only the faulty circuits and to avoid

indiscriminate tripping of healthy circuits. The protective scheme shall not be

susceptible to incorrect operation as a result of transient phenomenon, which may

arise during disturbances on the system.


11.02.00 The experience on various power systems in India has shown that a great majority of

system faults originate as earth faults, the no. of phase faults being comparatively

small. Special attention shall therefore, be given to the problem of providing a reliable

and high-speed earth fault protection. The phase faults should also be cleared in

minimum possible time in order to minimise damage and to maintain synchronous

stability. 11.03.00 All auxiliary relays, matching CTs, PTs and various timer relays etc. to complete the

protection scheme, shall be part of the bidder's scope of supply. The successful bidder

shall also recheck parameters of CTs and lead wire.

11.04.00 The electrical protection scheme proposed to be adopted for Unit comprising of

Generator, GT & Aux. Transformer shall have following functions

11.05.00 The protection system shall comprise pre-engineered modular or discrete self-

contained system comprising multifunction numerical relays (interfaced with

computer system for Ukai Hydro). In addition to the relays/protections mentioned in

this specification, any additional protections/relays considered necessary by the

Bidder for his system shall be included and offered by the Bidder. Licensed software

to read, set, configure and analyze the relay shall also be supplied. (along with

Computer system at Ukai Hydro system)

11.06.00 DC auxiliary supply shall be supervised by supply supervising relays. The NC

contact of the relays shall be delayed on drop off by approximately 100 to 200 m

sec. for annunciation in CRT / Generator control desk. The relay shall be provided

with flag indicators wherever required. White colour supervision lamps of clustered

LED type shall be provided on GRP to indicate availability of DC supply.

11.07.00 The relays shall be provided with continuous self-diagnostic facilities to indicate the

location of the failed component when pre-engineered protection system is offered.

Apart from this, facilities for comprehensive testing with external test kits shall also

be provided.

11.08.00 In addition to the contacts required as per schemes, Contractor shall wire out to the

terminal block at least one NO & one NC spare contacts of each of the relays.

11.09.00 The protection scheme shall include all the necessary contacts to achieve the functions

required, alarms in CRT, annunciation windows, sequence event recorder and for

Control room control panel annunciation wherever required. Contact multiplication

relays for generator circuit breaker and associated isolators shall be provided for this

purpose.

11.10.00 Additional Features

i The relay shall have a local friendly password-protected user man-machine interface

(MMI) comprising of a 2-3 line alphanumeric LCD display and a soft touch key pad to

access the settings, events and records in the relay.

i Optically isolated inputs & outputs (digital & analog)

i Digital signal processing

i Built-in circuit breaker failure protection

i Monitoring of CB trip circuit, CB condition and status

i Supervision of CTs & VTs

i Complete mechanical/electrical & atmospheric environmental protection/immunity as

per relevant standards.

i The protection system shall have facility to synchronise its time generator from

common time synchronisation from master clock of GPS system.

i The protection system shall have programmable scheme logic, multiple setting groups,

programmable settings and programmable characteristics.


i The relays/protection system shall have in-built facilities to measure electrical

instantaneous & integrated quantities, event & fault records/disturbance records.

iRequired support software for realising full capabilities of the protection system

including programming of settings, scheme logic & characteristics, viewing of

measurements, fault diagnostics, disturbance/fault records, depending trends & historical

data, fault analysis etc. , shall be part of supply.

11.11.00 GENERATOR PROTECTION: It should minimum cover following protections

Differential protection-87G.

Impedance Protection by Distance protection Zones- 21G

Negative phase sequence protection -46G

Loss-of-Excitation protection with provision for instantaneous trip-40G.

Pole Slip Protection- 98G

Low forward power protection -37G

Reverse power protection- 32G

Thermal Over Load protection- 49 G

Over Current Protection -50 O/L

Dead Machine protection- 94G

100 % Stator earth fault protection (both 0-95% and 0-100%) -64G1.

95 % Stator earth fault Protection- 64 G2

Standby Stator Earth Fault protection.

Inter Turn Protection -95G

Generator over voltage protection -59G. (High set , Over speed)

Generator Under Voltage Protection – 27G

Over and under frequency protection- 81GU & 81GO

Rotor Earth Fault Protection-64 GR

11.12.00 GENERATOR TRANSFORMER PROTECTION It should minimum cover following protections

Restricted Earth Fault Protection -64 GTR

Over-flux protection-99GT.

Non Directional back –up Over Correct Protection- 51GT

Non Directional back up neutral over-current protection- 51GTN

Interlocked Over Current Protection

Line Differential Protection

Local Breaker Backup

11.13.00 GENERATOR, UAT AND GENERATOR TRANSFORMER PROTECTION : It should minimum cover following protection,

Over All differential protection -87GT

11.14.00 UAT PROTECTION: UAT Over Current Protection

11.15.00 :PROTECTION SCHEME PERFORMANCE REQUIREMENTS:

11.15.01 : GENERATOR PROTECTION

(a) GENERATOR DIFFERENTIAL PROTECTION (87-G): This protection is to detect multiphase faults in the generator. The protection shall be

high speed and immune to AC transients. The relay shall not mal-operate due to


harmonics in the spill currents produced due to saturation of CTs during heavy

through faults and to limit voltage across the relay in the event of heavy internal fault

causing CT saturation. It shall be based on a three-phase high impedance / low

impedance circulating current principle selectable at site.

(b) GENERATOR BACK-UP PROTECTION (21 G): The system back-up protection against all types of un cleared faults in generator,

main transformer & 220 KV line shall be provided by means of a three phase two

stage under impedance protection with offset mho characteristics. Suitable time

delay timers shall be provided for grading with other devices. The element shall not

operate under maximum load conditions.

(c) NEGATIVE PHASE SEQUENCE PROTECTION (46G): The negative phase sequence protection against rotor overheating shall be provided

by a two-stage true thermal replica relay. The protection shall have a long inverse

time characteristics and shall be provided in each phase of the machine. The time

characteristics of the relay shall be adjustable to match I22t characteristics of the

machine. It shall be provided with thermal memory to take care on repeated periods

of unbalanced loading.

The relay shall provide two stages, one for alarm and one for trip. The alarm stage

shall have a definite time delay setting for giving early warning of an unbalanced

condition that may lead to generator tripping. The second stage for tripping shall be

based on a true thermal characteristic and shall have adjustable time current

characteristics that must be matched with negative sequence current withstand

characteristics of the generator.

A definite minimum time setting shall be provided to ensure an adequate grading

margin between the operation of the negative phase sequence element and any

downstream protection that may respond to unbalanced faults

(d) LOSS OF EXCITATION RELAY (40 G): This protection function shall detect the failure of generator excitation. It shall be

provided with an adjustable, offset circular impedance characteristic with an

adjustable tripping delay timer and an adjustable measuring element reset time delay.

The field failure characteristic shall enclose as fully as possible the impedance orbit

corresponding to that of the asynchronous condition; however the characteristic

should be clear of the power swing loci and the limiting generating point of the

machine when under excited.

The element shall have a provision to issue an instantaneous tripping, if the terminal

voltage of the machine falls drastically

The element shall have an under voltage check feature

(e) GENERATOR POLE SLIPPING PROTECTION (98 G): The loss of excitation protection should be supplemented by an out of step relay

which detects slipping of poles. The relay shall be capable of detecting a power

swing which can lead to instability in addition to its ability to detect an actual pole

slip.

The pole slipping protection shall be based on apparent impedance measurement

using Blinder and Lenticular Characteristic (adjustable). If the measured impedance

as seen at the generator terminal crosses the two halves of the lens characteristic and

spends longer than a specified time in each half a pole slip is encountered. The timer

range and lens characteristics shall be adjustable to suit the network requirements.

Two zones shall be created in the characteristics by a reactance line which can clearly

distinguishes between pole slip occurring with a system centre with in the power

system or in the generator.


Reliable detection of the first and subsequent pole slips of the generator shall be

achieved through separate and adjustable counters to be provided for each zone.

Pole slipping protection operating on some other principle shall also be acceptable

provided it has given satisfactory service.

(f) LOW FORWARD POWER PROTECTION (37G): The purpose of this protection is to detect a unit running at low active power

indicating fault in increase load sequence. This threshold depends on turbine

characteristic and tripping is usually delayed. Suitable interlock shall be provided for

operation during synchronous condenser mode.

(g) REVERSE POWER PROTECTION (32G) : Reverse power relay will be used to initiate tripping in case of motoring of machine

or turbine trip. A three phase reverse power element with a short time delay stage

interlocked with turbine tripping and a long time delayed stage independent of

turbine tripping shall be provided. The relay shall have a provision of sensitive

directional reverse power element such that sensitive reverse power setting of 0.5% of rated power can be achieved. Suitable provision shall be made to prevent

the operation of this element during machine start-up and synchronising conditions.

(h) STATOR THERMAL OVER LOAD PROTECTION (49G):

This protection shall be used as an additional check of the stator winding temperature

against excessive heating due to very high continuous overload current (thermal

replica). The protection relay must match the machine characteristics with an inverse

time thermal replica response defined by the generator supplier.

(i) OVER LOAD PROTECTION (50G) :

The relay shall be single pole type having continuously adjustable current setting

range of 50-200 % and an adjustable time setting range 0.5 to 60 secs for giving

alarm on the onset of overload. The relay shall have a drop off/pick up ratio greater

than 95 %.

(j) DEAD MACHINE ENERGISATION PROTECTION ( 94G) : A three phase high speed relay shall be provided for protection against inadvertent

energization of the machine at standstill. It shall comprise of a three phase over

current relay with a range 0.1 to 4In to initiate tripping if generator terminal voltage

in all three phases falls below a set threshold value.

The under voltage threshold setting shall be variable from 0.2 to 1.0 Vnom. A pick-

up timer shall be provided to prevent initiation of the element on event of close-up

three phase faults. A drop-off timer with a setting of 500 ms shall ensure that the

under voltage detector does not reset following accidental energisation.

(k) STATOR EARTH FAULT PROTECTION (64 G1):

Generator neutral will be connected to earth through a earthing transformer, the

secondary side of which is connected across a resistor. The stator earth fault relay

shall be connected across secondary of transformer. Protection consisting of 0-95%

& 95-100% stator winding fault detection shall be provided. The protection should be

insensitive to external faults , transients and inherent harmonics.

• 0 TO 95% STATOR EARTH FAULT PROTECTION:

• For coverage of faults within about 95% of the stator winding or better, a sensitive

neutral voltage displacement function shall be provided. The element shall be tuned


to the fundamental frequency. The element shall have a DT/Inverse time

characteristic.

• 95 to 100% STATOR EARTH FAULT PROTECTION :

(a) Third harmonic Undervoltage

• Protect 100% stator winding against earthfault in combination with the 95% stator

earthfault protection.

• Be sensitive to external faults, transients and inherent harmonic currents.

• Shall operate on the principle of detection of change in the magnitude/ distribution

of stator 3rd harmonic volatges caused by stator earthfault.

• Have time setting range from 0 to 100 sec. In steps of 0.01 secs.

(b.) Stator E/F protection using Low frequency injection principle

• 100% Stator Earth fault protection shall be provided by low frequency injection

principle thereby providing protection for generator during standstill, startup and

running conditions.

(m) OVER VOLTAGE PROTECTION (59 G): This protection is designed to protect the generator against over-voltages generated

internally or externally and liable to damage the machine.

The element shall comprise of two stages, each separately adjustable of over voltage

with threshold variable from 100% to 140% of rated voltage.

The phase – phase voltage shall be measured by the relay to prevent the element

operating during rise of voltage on downstream earth faults.

The first and second stages shall have variable time delay setting ranges of 0.5 to 5

sec and 2 to 20 sec respectively. The relay shall have a drop-off to pick up ratio

greater than 95 %

(o) GENERATOR UNDER FREQUENCY / OVER FREQUENCY PROTECTION (81U/O):

This protection element shall prevent the running of the generating unit from

exceeding the permissible operation time at above or below the set frequencies. Five

stages of frequency protection shall be provided. Each stage shall be independently

settable as under frequency or over frequency protection. The time delays for each

stage shall vary from 0.1 to 20 sec in steps of 0.1s. The frequency setting range shall

be variable from 45 Hz -55 Hz in steps of 0.1 Hz.

(p) ROTOR EARTH FAULT PROTECTION (64R): This shall detect the rotor earth fault by the injection of ac low voltage between the

winding of the protected synchronous machine and the ground providing two

independent time delayed thresholds for the resistance with measurement display.

The AC injected input shall be able to trip the system based on the injected over

current or Over voltage conditions.

In case of opening of the field, there shall be a separate provision of DC injection to

detect under/over voltage and provide tripping.

The protection shall be provided which shall be of Numerical type(Inbuilt or external to

the comprehensive Generator protection relay). .


(q) INTER TURN FAULT PROTECTION (95G)

The purpose of this protection is to detect a fault between the windings of the same

phase for generators made up of several circuits in parallel. This function shall be

performed by a time delay over-current protection connected between the natural

point of each parallel winding.

According to the alternator specification, if the generator has only common neutral of

parallel circuits for each phase brought out, the interturn fault protection shall be

based on zero sequence voltage measurement.

11.16.00 GENERATOR TRANSFORMER PROTECTION:

(a) RESTRICTED EARTH FAULT PROTECTION – 64GTR:

The Restricted Earth Fault protection function shall be provided to protect the HV

winding of generator transformer against internal faults for protected zone

i). Be single pole type

ii). Be high / low impedance differential protection (Selectable at site)

iii). Be high speed circulating current type

iv). Be tuned to the system frequency

v). Be high speed with typical operating time of less than 30 ms at 2 times setting.

vi). Be stable for through fault & provision for preventing CT saturation, harmonics

and DC transients

vii). Have current setting of 10-40% of rated current

viii). Be suitably protected against high voltages.

The restricted earth fault protection shall be configurable as either high impedance or low impedance biased differential at site

(b) OVER FLUX PROTECTION (99 GT):

The over flux protection shall be provided to safeguard the transformer against the

operation at flux densities which may cause damage to the core.

i). Operate on the principle of voltage to frequency ratio and shall be phase to phase

connected. ii). Have inverse time characteristics, matching with transformer over fluxing

withstand capability curve. iii). Provide an independent àlarm’ with the time delay continuously adjustable

between 0.1 to 6 seconds. iv). Tripping time shall be governed by v/f vs. time characteristic of the relay. v). V/F setting shall be adjustable from 1.0 to 1.5 times rated flux.

vi). Have a set of characteristics for various time multiplier settings. The maximum

operating time of the relay shall not exceed 3 seconds and 1.5 seconds at `V/F’

values of 1.4 and 1.5 times of rated values respectively. vii). have an accuracy of operating time, better than ± 10% Have a resetting ratio of

95% or better, rated voltage 110V AC. 50Hz.. viii). Provide sufficient number of potential free contacts to cater the needs of

connection to alarm annunciation. Data acquisition and optional trip facility to be

connected by purchaser where needed. Includes hand reset LED for Alarm & Trip operated indication.


(c) NON-DIRECTIONAL BACK UP GT OVER CURRENT PROTECTION WITH HIGH SET-50/51GT.

(i) Over current protection with IDMT characteristic shall provide backup protection

for generator transformer against faults which produce over current. (ii) Shall have an adjustable range of 50-200 %. This shall be connected to the HV/

Neutral bushing CT with suitable current setting range.

(d) NON DIRECTIONAL BACK UP GT NEUTRAL OVER CURRENT

PROTECTION (51 NGT): Over current protection with IDMT characteristics shall be provided for system earth

fault. This shall be connected to the HV neutral bushing CT with suitable current

setting range.

(e) Line differential Protection

The Line differential protection function shall be provided to protect the 220 kV Over

head line from GT HV to Switch yard breaker as they are at a distant apart, against

internal faults for protected zone

i). Be three pole type

ii). Be high impedance differential protection

iii). Be high speed circulating current type

iv). Be tuned to the system frequency

v). Be high speed with typical operating time of less than 30 ms at 2 times setting.

vi). Be stable for through fault & provision for preventing CT saturation, harmonics

and DC transients

vii). Have current setting of 10-40% of rated current

viii). Be suitably protected against high voltages.

The Line differential protection shall be configurable as either high impedance or low impedance biased differential at site

f) Local Breaker Backup (LBB) Protection

g) Interlocked Over Current Protection

11.17.00 GENERATOR & GENERATOR TRANSFORMER PROTECTION

(a) OVERALL DIFFERENTIAL PROTECTION (87 T): This relay/function shall be provided for protecting the generator and generator

transformer, HV side of auxiliary transformer, excitation transformer’T-off’,11 KV bus

duct from power house to generator transformer and O/H line from PH to 220KV

Gantry in the switchyard. The measurement system shall have 3 phase features and it

should be possible to detect phase faults on both sides of the generator transformer and

single phase faults on HV side.

i) The relay shall be biased differential protection ii) The relay shall be stable for through faults and provision for preventing CT

saturation iii) The relay shall be immune to magnetizing inrush current. and

iv) The relay shall have features to provide stability under over excited conditions and

have 2nd

and 5th

harmonic restraint features.5th

harmonic bypass is not acceptable.

v) The relay shall be triple pole type with faulty phase identification/ indication.

vi) The relay shall be high speed with an operating time of less than 30 ms at 5 times the

rated current.


vii) The relay shall have an additional high set instantaneous element for rapid clearance

of heavy faults(which shall not operate during inrush)

viii) Have internal features in the relay to take care of the angle and ratio correction

ix) The relay shall display differential and bias currents

11.18.00 ADDITIONAL FUNCTIONS AND FEATURES

Apart from the protection functions specified above, the numerical protection equipment shall be provided with the following functions and features:

11.19.00 CURRENT CIRCUIT SUPERVISION AND FUSE FAILURE SUPERVISION The relay unit shall give alarm or block protection functions expected to give unwanted

tripping during open or short circuited CT cores and failure in the secondary circuits of

the voltage transformer.

11.20.00 MEASUREMENT :

IED shall measure and display on line information on the local HMI and on the

Substation Automation System about:

• measured voltages, currents, frequency, active, Reactive and apparent power and power factor,

• The primary and secondary phasors,

• Differential currents, bias currents,

• positive, negative and zero sequence currents and voltages,

• measured values and other information of the

• different parameters for included functions,

• logical values of all binary in- and outputs and

• general IED information

All measured values shall be time tagged with real clock in the system itself

11.21.00 SELF DIAGNOSIS AND SUPERVISION: Continuous self diagnostics tests on microprocessor, memory, timers and the

analog input module and the stand alone relays shall be carried out by the

equipment to immediately signal any failure. Internal and external auxiliary

supplies shall in particular be continuously supervised. The self monitoring shall be

executed through hardware and software separately and in the event of failure, the

relays shall either lockout or attempt a recovery depending on the type of failure

detected.

11.22.00 HUMAN MACHINE INTERFACE. :

The HMI shall be with LCD to display at least 7 lines of text and 40 characters and

shall include LEDs for status indication and at least 15 configurable LEDs for

alarm indication.

11.23.00 PROGRAMMABLE SCHEME LOGIC: The relay should have number of logic blocks and timers to adapt the configuration

to the specific application needs.

11.24.00 DISTURBANCE REPORT: The disturbance report shall include Timed Tagged Events, Status of Binary Signals,

Sampled data of Analogue input & Binary signals and Pre fault & Fault values for

currents, voltages.


i) Up to 1000 number of Continuous time tagged event logging in the Event

List shall be available and 150 number time tagged events in the Event

recording per recording.

ii) 100 Disturbance Record with a total Disturbance Recording time of 340 secs

with facility for programmable pre and fault recording time. It should be

possible to save the record in a COMTRADE format for replaying by relay test

kit

iii) The disturbance recorder shall be with 40(External & Internal) Analogue

channels and 96 binary signals

iv) Any digital signal can be programmed to act as trigger for the DR. Analog

channels should have programmable threshold levels for triggers and selection

for over or under levels should be possible

v) Latest software CDs for configuring / programming / setting the relay,

extracting and analyzing the disturbance records shall be supplied.

Interconnecting cable between relay front port and local PC shall also be

supplied with the relay

11.25.00 COMMUNICATION:

(i.) It shall have Communication ports: RS232 /Ethernet/USB/Optical port on

front side for communication with Laptop/Desktop and Optical/ Ethernet port /

RS485 at rear side for connection to substation automation system for IEC

61850 standard

(ii.) All numerical relays offered shall be IEC 61850 compliant. Bidder shall submit

KEMA certificate showing compliance for major functions like Buffered

Reports(6),Time synchronization(13),GOOSE(9ab),Direct Control(12a),File

transfer.

11.26.00 TIME SYNCHRONISATION:

Time synchronization shall be depending upon facility available at site either by

SNTP or IRIG-B , Binary input . All these facility should be available in the relay

11.27.00 BINARY INPUTS. At least 16 number optically isolated inputs

11.28.00 BINARY OUTPUT RELAYS:

At least 32 number independent. Programmable outputs

11.29.00 HOUSING:

Flush Mounting

Screw Terminals: (‘O’ Lug for CT Connection)

Degree of Protection: IP51

12.00.00 TESTS

12.01.00 TYPE TEST

12.01.01 The relay offered shall be fully type tested as per the relevant

standards. Test certificate not older than 5 years shall be supplied along

with offer by the bidder.

12.01.02 The reports for following type tests shall be submitted by the bidder.


a) Insulation tests as per IEC – 60255-5.

b) High frequency disturbance test as per IEC-60255-4

(Appendix – E) Class III

c) Fast transient test as per IEC 1000-4 Level III .

d) Relay characteristics, performance and accuracy test as per IEC 60255.

Steady state characteristics and operating time.

Dynamic Characteristics and operating time for distance protection

relays and current differential protection relays.

For Disturbance recorder and even logger only performance tests are

intended under this item.

e) Tests for thermal and mechanical requirements as per IEC-60255-6

f) Tests for rated burden as per IEC – 60255-6

g) Contact performance test as per IEC – 60255-0-20.

12.01.03 The purchaser reserves the right to demand repetition of some or all the

type test in the presence of the purchaser’s representative. For this

purpose the bidder may quote unit rates for carrying out each type test.

For any change in the design/type already type tested and extra cost in

case, the equipment has not beentype tested earlier, the entire type test

as per relevant standards shall be carried out by the successful bidder in

the presence of purchaser’s representative without any extra cost.

12.02.00 ACCEPTANCE AND ROUTINE TESTS

12.02.01 All acceptance and routine test as stipulated in the relevant standards

shall be conducted at the place of manufacturer in presence of

purchaser’s representative without any extra cost.

12.02.02 Immediately after finalization of the programme of type/ acceptance/

routine/ testing the supplier shall give two weeks advance intimation to

the purchaser to enable him to depute his representative for witnessing

the tests.

12.02.03 No equipments shall be dispatched before all tests and inspection have

been carried out according to the approved quality assurance plan unless

otherwise instructed by the purchaser

13.00.00 INSPECTION DURING MANUFACTURING: 13.01.00 The inspection may be carried out by the purchaser at any stage of manufacture. The

successful bidder shall grant free access to the purchaser’s representative at a

reasonable time when the work is in progress. Inspection and acceptance of any

equipment under this specification by the purchaser shall not relieve the supplier of

his obligation of furnishing equipment in accordance with the specifications and shall

not prevent subsequent rejection if the equipment is found to be defective.

13.02.00 The supplier shall keep the purchaser informed well in advance, about the

manufacturing programme so that the arrangement can be made for inspection.

13.03.00 The purchaser reserves the right to insist for witnessing the acceptance routine testing

of bought out items.

14.00.00 QUALITY ASSURANCE PLAN: 14.01.00 The bidder shall invariably furnish along with his offer the quality assurance plan

adopted by him/his sub-supplies in the process of manufacturing all major

equipment/component.

14.02.00 Precaution taken for ensuring usage of quality raw materials and sub-components

shall be stated in the quality assurance plan.


14.03.00 13.00.03: The bidder should specifically express their consent to accept additions,

revisions to their quality assurance plan to meet the purchaser’s requirements if

needed. The final quality assurance plan to be adopted, with mutual consent, shall be

decided after discussion with successful bidder.

15.00.00 PERFORMANCE GUARANTEE: 15.01.00 All equipment supplied against this specification shall be guaranteed for a period of

24 months from the date of receipt at the destination store centre. However any

engineering error, omission, wrong provision, equipment failure etc., if found during

actual commissioning of the equipment shall be attended by the supplier free of cost.

16.00.00 DEVIATIONS No deviations to this specification shall be acceptable unless specifically

indicated in the offer in the relevant schedule. All deviations shall be clearly spelt

out by the Bidder and the price implications thereof.

GSECL at their discretion will decide regarding acceptance of deviation.

Bidder must furnish List of Technical Deviations mentioning the specification

clause nos. against which deviations have been sought for. Compliance with

this specification will be taken for granted in absence of any specific mention

of deviations in the said list of deviations. Any implied deviation or any deviation mentioned elsewhere in the offer shall not be considered.

17.00.00 DOCUMENT SUBMISSION: 17.01.00 All drawings/documents submitted by supplier shall be in sufficient detail to indicate

the type, size, arrangement, weight (as applicable),the external connections, fixing

arrangements required, the dimensions required for installation and interconnections

with other equipment and materials, clearances and spaces required between various

portions of equipment and any other information specifically requested.

17.02.00 Drawings / Documents submitted shall be signed by responsible representatives of

the Bidder and all drawings shall be of A-3 size. (297mmX420 mm ). All dimensions

on drawings shall be in Metric Units, unless otherwise specified. The details in the

drawings shall be in English language only.

17.03.00 In addition to the information provided on drawings, each drawing shall carry a

revision number, date of revision and brief details of revisions arrived out. Wherever

any revision is carried out, correspondingly revision number must be updated. All

revisions carried out shall be highlighted on the drawing and a Separate sheet

furnished stating the reasons for such revision. A note stating drawing is generally

revised is not acceptable.

17.04.00 Drawings submitted by the Bidder for approval will be checked / reviewed by the

Purchaser’ and comments, if any, on the same will be conveyed to the

Bidder. It is the responsibility of the Bidder to incorporate correctly all the

comments conveyed by the Purchaser on the Bidder’s drawings. The drawings

which are approved with comments are to be resubmitted to the Purchaser for

purpose of records. Such drawings will not be checked / reviewed by the

Purchaser to verify whether all the comments have been incorporated by

the Bidder. If the Bidder is unable to incorporate certain comments in his

drawings he shall clearly state in his forwarding letter such non-compliance

along with valid reasons and justification.


17.05.00 Any work performed or material ordered by the Bidder prior to receipt of drawings

stamped ‘Approved with comments as noted’ by the Purchaser shall be at the risk of

the Bidder. After print of any drawing has been returned ‘Approved’, the Bidder may

release the parts covered by the drawing, for production / construction.

17.06.00 Reproducible, where called for in the Drawing Submission Schedule, shall be

submitted after the approval of drawings. These should be of good quality and capable

of producing clear and legible prints.

17.07.00 Upon completion of the installation, the Bidder shall furnish a complete set of

drawings on reproducible form on which the Bidder shall make in a neat and accurate

manner, a complete record of all changes and revisions to the original design, as

installed in the completed work. These drawings shall be submitted to the Purchaser.

17.08.00 Drawings prepared by the Bidder and approved by the Purchaser shall be considered

as a part of the Contract Specification. However, examination and approval of the

drawings by the Purchaser shall not relieve the Bidder of his responsibility for

engineering, design, workmanship, materials and construction under the Contract.

17.09.00 If, at any time before the completion of the work, changes are made necessitating

revision of approved drawings, the Bidder shall make such revisions and proceed in

the same routine as for the original approval.

17.10.00 The drawing and documents which are not subject to approval shall be stamped “FOR

INFORMATION”. However, the Purchaser shall reserve the right to comment.

17.11.00 The Bidder shall prepare and submit to the Purchaser, operation and maintenance

manuals in accordance with the Purchaser’s requirements and in sufficient detail, for

the Purchaser to get familiarized with the equipment and to enable him to operate,

maintain, dismantle, reassemble, adjust and repair the equipment in a safe and

efficient manner. O&M Manual shall contain

i) Vendor Contact Details

ii) Storage Instruction

iii) Erection & Commissioning Instruction

iv) Operating Procedure /Instruction and Maintenance Schedule

v) List of Bought out component & sub vendor’s addresses

vi) Technical Data Sheet

vii) Leaflets of Bought Out component

vii) Drawings etc.

17.12.00 A separate section of the manuals shall be devoted to each size/ type of equipment

and shall contain a detailed description of construction and operation, together with

all relevant pamphlets, catalogues, drawings and a list of parts with procedure for

ordering spares. Maintenance instructions shall include checking, testing and

replacement procedures to be carried out to ensure trouble-free operation.

17.13.00 All documents including drawings, data sheets, erection and commissioning manuals,

O & M manuals shall be provided on electronic media viz. CD’s. Each electronic

media shall be of high quality and suitable for long-term storage. The

reproduction from media shall be of good quality.


18.00.00 DRAWINGS / DATA / DOCUMENTS TO BE SUBMITTED BY BIDDER ALONGWITH THE BID

18.01.00 As a minimum, the bidder shall furnish the following in two sets failing which the

bids shall be rejected. i) Typical general arrangement drawing of the equipment showing

overall dimensions.

ii) Typical schematic drawing in respect of Panel , relay/scheme

offered looking to the scope , visit at site , discussion with GSECL which shall include Analoge input , Binary Input Output , Logic , etc. on the basis of which technical scrutiny will be made.

iii) Catalogues for equipment and fittings & accessories

iv) Operation & Maintenance Manual.

v) Schedules as per Section III.

vi) Quality assurance plan

vii) Type test reports of similar rating equipment

viii) Experience certificates of supply of identical types of equipment

ix) List of sub-vendors for purchaser’s approval.

19.00.00 DRAWINGS / DATA / DOCUMENTS TO BE SUBMITTED BY

SUCCESSFUL BIDDER 19.01.00 After issue of detailed purchase order, the successful bidder shall submit within four

weeks, four sets of complete drawings along with detailed bill off material for

approval. In normal practice, the documents submitted for the approval will be

commented upon or approved if in order, within 15 days from the date of receipt of

the same.

19.02.00 Before dispatch of equipments to consignees, the supplier is required to submit sets

of following drawings / documents in suitable files. There shall be such five sets per

equipment and shall be forwarded to (a) Three sets to consignee before Dispatch of

equipment (b) one set with equipment and (c) One set to C.E. (G) GSECL Vidyut

Bhavan , Race Course Vadodara-390007

a) Control schematics and wiring diagrams.

b) Operation and maintenance manual.

c) Commissioning manual.

d) Catalogues for all bought out items.

The manuals and test reports should be submitted in bound form suitable for

long storage with the necessary information printed on the cover page as well as

back for easy traceability. The documents not submitted in the above manner

will not be accepted.

All Erection, operation & maintenance manuals & drawings shall be furnished in

reproducible form ( CDs) also.

20.00.00 DEMONSTRATION During technical scrutiny of the bid purchaser may ask to give

demonstration of offered relay. The bidder shall demonstrate the same

within two weeks of intimation from purchaser.

21.00.00 PACKING AND TRANSPORT:

21.01.00 All equipment/material shall be suitably packed for transport, carriage at site and

outdoor storage during transit. The contractor shall be responsible for any damage to

the equipment during transit due to improper and inadequate packing. The cases


containing easily damageable material shall be very carefully packed and marked

with appropriate caution symbols i.e. `FRAGILE’ `HANDLE WITH CARE’, ÙSE

NO HOOK’ etc. The contents of each package shall bear marking that can be readily

identified from the package list and packing shall provide complete protection from

moisture, termites and mechanical shocks etc.

21.02.00 Wherever necessary proper arrangement for attaching slings for lifting shall be

provided and all packages clearly marked with gross weight, signs showing ÙP’ and

`DOWN’ sides of boxes, contents of each package, order no. and date, name of the

plant of which the material in the package forms part of and any handling and

unpacking instructions considered necessary. Any material found short inside the

intact packing cases shall be supplied by the manufacturer/supplier without any extra

cost.

21.03.00 Bidder shall ascertain, prior to shipment, from concerned authorities, the transport

limitations like weight and maximum allowable package size for transportation.

Fragile material such as relay cases, Instruments and other glass material shall be

carefully covered with shock absorbing protective materials, such as thermocol, silica

gel or equivalent moisture absorbent material in small cotton bags shall be placed

inside the packing wherever necessary.

21.04.00 Each consignment shall be accompanied by a detailed packing list containing the

following information.

a) Purchase order reference.

b) Name of consignee

c) Details of consignment

d) Destination

e) Total weight of consignment

f) Handling and unpacking instructions.

g) Bill of materials indicating contents of each package

h) Sign showing upper/lower side of the crate.

22.00.00 TRAINING: 22.01.00 The successful bidder shall be required to provide facility for in-plant training, at no

extra cost to the purchaser’s four engineers to be nominated by the purchaser for

a period of three days at his works, where the equipment offered shall be

manufactured. The training shall cover familiarization with manufacturing and

assembly techniques, procedures of installation, testing, commissioning, operation,

maintenance and trouble shooting on the relays .

22.02.00 If the relay offered, is being designed and manufactured in collaboration with any

other manufacturer, the supplier shall provide facilities for the in-plant training in the

collaborators works.

22.03.00 In case of training within India, the to and fro travel expenses, lodging and boarding

charges as well as allowances for out of pocket expenses in respect of the trainees,

shall be borne by the Purchaser. However, the supplier shall provide suitable

facilities for lodging and boarding as well as to and fro transport to place of training

from the hotel/guest house.

22.04.00 The programme of the training shall be mutually discussed and finalized by the

purchaser with suppliers.


23.00.00 SUPERVISORY INSTALLATION & COMMISSIONING: 23.01.00 The bidder shall depute their Engineer, technician to the site for carrying out the

retrofitting work, testing and commissioning of relays, schemes etc.

24.00.00 SCHEDULES: 24.01.00 The bidder shall fill in the schedules indicated in Section IV which form part of the

bid specification and offer. If the schedules are not submitted duly filled in with the

offer, the offer is likely to be rejected.

25.00.00 GUARANTEE FOR MAINTENANCE SPARES AND SERVICES:

The bidder shall guarantee for supplying maintenance spares and services as well as

repairing of relays for a period of the life expectancy of 25 years.


SECTION III: ANNEXURES

CONTENTS

Sr.

No.

DESCRIPTION PAGE

NO.

I Schedule of requirements and desired delivery 32

II List of standards 33

III-A Ukai Hydro Station Unit 1 to 4 – Existing Protection Scheme 35

III-B Ukai Hydro Station Unit 1 to 4 – Proposed Protection Scheme 36

IV Ukai Hydro Station Unit 1 to 4- Existing Panel GA Drawing 37

V Ukai Hydro Station Unit 1 to 4- CT , VT and Relay Detail 39

VI Ukai Hydro Station Unit 1 to 4- Existing Relay Setting 42

VII Ukai Hydro Station Unit 1 to 4- Details for Generator and

Generator Transformer

43

VIII-A Kadana Hydro Station Unit 3/4 – Existing Protection Scheme 44

VIII-B Kadana Hydro Station Unit 3/4 – Proposed Protection Scheme 45

IX Kadana Hydro Station Unit 3/4- Panel GA Drawing 44

X Kadana Hydro Station Unit 3/4 – CT Detail 45

XI Kadana Hydro Station Unit 3/4 – Relay and Setting Detail 46

XII Kadana Hydro Station Unit 3/4 – Relay , CT and VT Detail 48

XIII Kadana Hydro Station Unit 3/4 – Generator , GT , ET and UAT

Detail

49


ANNEXURE –I

SCHEDULE OF REQUIREMENTS AND DESIRED DELIVERY

Sr.

No.

Item Qty. Desired

Delivery

1 Supply of Pre wired Protection Panel comprising Numerical Generator

Protection Scheme for Generator , Generator Transformer , UAT

Protection Relays and other auxiliary relays and accessories as per

specification for Ukai Hydro station Unit No. 1 to 4.

4 Set

2 Supply of PC, networking cable, Ethernet Switch , interfacing

equipments etc for DR work station and SCADA (W/O Control)

application as per specification for Ukai Hydro Station Unit 1 to 4.

1 set

3 Installation, Testing and commissioning of Generator Protection

Scheme consisting of Generator , Generator Transformer , UAT

Protection Relays along with accessories as per specification for Ukai

Hydro Station Unit 1 to 4.

4 Set

4 Installation, Testing and commissioning of DR work station &

SCADA (W/O control) communication system as per specification for

Ukai Hydro Station Unit No. 1 to 4.

1 Set

5 Supply of Pre wired Protection Panel comprising Numerical Generator

Protection Scheme for Generator , Generator Transformer , UAT

Protection Relays and other auxiliary relays and accessories as per

specification for Kadana Hydro station Unit No.3

1 Set

6 Installation, Testing and commissioning of Generator Protection

Scheme consisting of Generator , Generator Transformer , UAT

Protection Relays along with accessories as per specification for

Kadana Hydro station Unit No.3.

1 set

7 Supply of Spare set of relays only without panel for Generator ,

Generator Transformer and UAT, similar to above protection panel as

per specification.

1 set

8 Buyback of existing Generator Protection Scheme relays for Ukai

Hydro Station Unit 1 to 4

4 Set

(Shall be furnished on line bid)


ANNEXURE: II LIST OF STNDARDS

i) RELAYS

Sr.

No.

Standard No. Title

a) IS: 3231 - 1965 Specification for Electrical Relays for Power System Protection.

b) IS: 3842 Application guide for Electrical Relays for ac system.

Part-I – 1967 Over current Relays for Feeder & Transformer.

Part-II – 1966 Over current Relays for Generators & Motors.

Part-III – 1966 Phase unbalance Relays including Negative Phase Sequence Relays.

Part-IV – 1966 Thermal Relays.

Part-V – 1968 Distance Protection Relays.

Part-VI – 1972 Power Relays.

Part-VII – 1972 Frequency Relays.

Part-VIII – 1976 Voltage Relays.

Part-IX – 1976 Relays for Bus Bar Protection.

Part-XII – 1976 Differential Relays for X-mers.

c) IS: 1885 Electro-Technical Vocabulary.

Part-IX-1966 Electrical Relays.

Part-X-1966 Electrical Power system Protection.

Part-XVII-1979 Switchgear and Control gear.

d) IS: 5834 Specification for Electrical timer Relays for industrial purposes.

Part-II-1973 Motorized.

e) IS: 8686-1977 Specification for Static Protection Relays.

f) IEC: 50(16) International Electro-technical Vocabulary: Protective Relay.

g) IEC-255 (Part 1-19) Electrical Relays.

ii) METERS a) IS: 1248 Indicating Instruments

b) IS: 2419 Indicating Meters

c) IS: 722 AC Electricity Meters

Part-IV – 1961 Three Phase Watt-Hour meters with Max. Demand Indicators

d) IS: 6236 – 1971 Specifications for Direct recording Electrical Measuring Instruments

iii) CONTROL SWITCHES & PUSH BUTTONS a) IS: 6875 Control Switches for Voltages up to and including 1000V AC & 1200V DC

Part-I – 1973 General Requirements

Part-II – 1975 Push Buttons and Related Control Switches

Part-III – 1980 Rotary Control Switches

b) IS: 4064 Air break switches, Disconnectors, Switch Disconnectors/ Switch-Fuse combination

Units for Voltages not exceeding 1000VAC or 1200VDC

Part-I – 1978 General Requirements

Part-II – 1978 Specific Requirements for Direct Switching of Individual Motors

c) IEC– 337 & 337-1 Control Switches and Low Voltage Switching Devices for Control & Aux. Circuits.

iv) INDICATION LAMPS a) IS: 1901 – 1961 Specifications for Visual Indication Lamps.

V) PANEL WIRING a) IS: 694-1977 Specifications for PVC insulated cables for working voltage up to &

including 1100V

b) IS: 375-1963 Marking & arrangement for switchgears, bus bars main connections and

Auxiliary wiring.

c) IS: 1554 (Part-I) PVC Insulated cables up to & including 1000V.


vi) MISCELLANEOUS a) IS: 2705 Current Transformers.

b) IS: 3156 Voltage Transformers.

c) IS: 5 Colour for Ready mixed Paints and Enamels

d) IS: 9224 (Part-II) HRC cartridge fuses.

e) IS: 2147 Degree of protection provided by enclosures for LV switchgear & control gear

f) IS: 6005 Code of practice for Iron & Steel.

Latest IEC Standards: Sr.No. Standard no. Title

Electromagnetic Compatibility type test: 1. IEC-60255-22-1, Class-III, MHz burst disturbance

2. IEC-60255-22-2, Class-III

IEC-61000-4-2, Class-III

Electrostatic discharge

Direct application

Indirect application

3. IEC-60255-22-4, Class-A Fast transient disturbance

4. IEC-, 60255-22-5 Surge immunity test

5. IEC-60255-22-7, Class-A Power frequency immunity test

6. IEC-61000-4-8, Class-V Power frequency magnetic field test

7. IEC- 60255-22-3 Radiated electromagnetic field disturbance

8. EN-61000-4-3 Radiated electromagnetic field disturbance

9. IEEE/ANSI/C37.90.2 Radiated electromagnetic field disturbance

10. IEC- 60255-22-3 Conducted electromagnetic field disturbance

11. IEC- 60255-25 Radiated emission

Insulation tests: 1. IEC- 60255-5 Dielectric test

Impulse voltage test

Insulation resistance

Environmental tests: 1. IEC-60068-2-1 Cold test

Storage test

2. IEC-60068-2-2 Dry heat test

3. IEC-60068-2-3 Damp heat test, steady state

4. IEC-60068-2-30 Damp heat test, cyclic

CE compliance 1. IEC- 60255-26 Immunity

2. IEC- 60255-26 Emissive Test

3. EN-50178 Low voltage directive

Mechanical tests 1. IEC- 60255-21-1 Vibration

2. IEC- 60255-21-2 Shock and bump

3. IEC- 60255-21-3 Seismic


ANNEXURE-III-A Ukai Hydro Power Station Unit No. 1 to 4 Existing Protection Scheme

I

220 kV Bus II P2 Line Differential Inter locked O/C

CT-15. Core-4, 250/1, 10VA, S10 Core-1 , 500-250/1 , 45VA , S10

Inst. & Metering Core-2 , 250/1 , 60VA , -C

Bus Bar Diff. Core-3 , 1000/1 , 60 VA , S10

Switch Yard Power House

ACT-11 (0.96/2.89A) CT-17 Core-1 , 250/1 , 45VA , S10

Core-2 , 250/1 , 10 VA , S10 Line Drop Copm.

Core-3 , 1000/1 , 20 VA , S10 Y Phase P1 CT-14

GT 250/1, 30 VA

S10

CT-13 UAT 85 MVA , Yd11 , 220/11 kV Core-1 , 100/1 Core-2 , 5000/5 1 MVA , 11kV / 415 V

20VA S10 60VAS10

11 kV / √3/ 11 kV / √3/ 110 V /√3 110 V /√3

LAVTC-1 GVT12 GVT11

P2

CT-12 AVR Core-1 , 5000/5 , 60VA , S10

AVR Instrument & Core-2, 5000/5 , 60VA-CM Y Phase

Metering

Core-3, 5000/5 , 60VA , S10

P1

Generator

Rotor E/F

CT-11 P2 Metering

Core-1 , 5000/ , 60VA , CM

Core-2 , 5000/5 , 60VA , S10

Core-3 , 5000/5 , 60VA , S10

Core-4 , 5000/5 , 60VA , S10

P1

NGT: 11kV / 110V NGR 15 kVA, %Z = 4.74 0.116 Ω

G

VME64R DMH31A

87GT

VDG 14 64 GS

CAG34 87 G

CDN

46 G

YCGF 40 G

ZAG31 21 G

VDG11

59GA

VAG

59GB

VAG

27 G

CDG11 50/51

UAT

CAG14 64 GTR

CAG34 87 L

CDG11 51GI

7RW

81U


ANNEXURE-III-B Ukai Hydro Power Station Unit No. 1 to 4 Proposed Protection Scheme

I

220 kV Bus II P2 Line Differential

CT-15. Core-4, 250/1, 10VA, S10 Core-1 , 500-250/1 , 45VA , S10

Inst. & Metering Core-2 , 250/1 , 60VA , -C

Bus Bar Diff. Core-3 , 1000/1 , 60 VA , S10

Switch Yard Power House

ACT-11(0.96/2.89A) CT-17 Core-1 , 250/1 , 45VA , S10

Core-2 , 250/1 , 10 VA , S10 Line Drop Copm.

Core-3 , 1000/1 , 20 VA , S10 P1 Y Phase CT-14

GT 250/1, 30 VA

S10

CT-13 UAT 85 MVA , Yd11 , 220/11 kV Core-1 , 100/1 Core-2 , 5000/5 1 MVA , 11kV / 415 V

20VA S10 60VAS10

11 kV / √3/ 11 kV / √3/ 110 V /√3 110 V /√3

LAVTC-1 GVT12 GVT11

AVR Inst. & P2 Metering

CT-12 Core-1 , 5000/5 , 60VA , S10

AVR Core-2, 5000/5 , 60VA-C Y Phase

Core-3, 5000/5 , 60VA , S10

P1

Generator Rotor E/F

CT-11 P2

Core-1 , 5000/ , 60VA , CM Metering

Core-2 , 5000/5 , 60VA , S10

Core-3 , 5000/5 , 60VA , S10

Core-4 , 5000/5 , 60VA , S10

P1

NGT: 11kV / 110V NGR 15 kVA, %Z = 4.74 0.116 Ω

Note: - The bidder can suggest different scheme other than indicated here according to CT-PT input

available in the offered relay provided it should cover full scheme of protection as per requirement considering separate CT/PT input for protection as indicated

G

50/51 UAT

87 L

51GI

87G

40G

37G

21G

98G

32G 46G

49G

50G

59G

99G

81U

81O

64G1

64

R

27G

64G2

94G

PROPOSED GENERATOR PROTECTION RELAY

87GT

64

GTR 50/51 GT

49

PROPOSED TRANSFORMER

PROTECTION


ANNEXURE-IV

Ukai Hydro Unit 1-4 :- Existing Panel GA Drawing

(A) Generator Relay Panel Rear Side:

Generator Differential Generator Stator E/F Generator Rotor E/F Inter Locked Over Current

Fuse Failure Relay Electrical Shut Down Electrical Shut Down Controlled Shut Down

Generator Over Voltage Gen. Inst. Over Voltage Aux. to Field Failure Field Failure

GT HV REF Line Differential Aux. relay Aux. Relay

VAA (1 element) VAA (2 element)

86 BGX-Aux. Relay 89BGAX – Aux. Relay

VAJH13

GT Over all Differential.

86 BG Bus Bar Protection

Distance Back Up

Negative Phase Seq.

Trip Circuit Supervision

Timer- Field Failure Timer for Seq. Trip

UAT O/C Protection

TTB

Height of Panel- 2300mm

Width of Panel- 900mm

Depth of panel- 600mm.

CAG 34

87 G

VDG 14

64 GS

VME

64 R

CDG 11

51G1

VAPM 31,

68 GF

VAJ

30 Z

VAJ

30 Z

VAJ

30X-30Y

VDG 11

59 GA

VAG

59 GB

VAA

40 GZ -GY

YCGF 11

40 G

CAG 14

64 GTR

CAG 34

87 L

VAA 51UTX,64GSX,87G

X

CAA 63GX,49G

X,26GX

ZAUM

21G

DMH

31

87 GTR

VAX31

97G

CDN 31

46 T

VAT 11 CDG 11

50/51 UAT VAT 11


(B) Generator Control & Relay Panel Front Side:

R Y B

Timer kV Meters Ampere Meters

Freq. Meter Hour Counter PF Meter

Timer

Rotor Temperature Indicator Indicators

Trip Coil -1 Supervision V1R1 2JA Syn. TNC Switch

Isolator Switch Selection Switch VAJH 13

VAG

Gate Drop Relay

Trip Coil -2 Supervision V1R1 2JA

Switch Generator U/V Volt Meter Sel. Switch Rotor E/F Relay Supply

7RW 6000 CAA VAG

Siemens

Controlled S/D Over Speed (Inst. O/V )

Energy Meter

Under / Over CT Switching CT Switching

Freq. relay Zone-A Zone-B

TTB

Height of Panel- 2300mm

Width of Panel- 600+900= 1500mm

Depth of panel- 600mm.

VAT 11

VAT 11

DZT4

AEI

DZT4

AEI A

SCANNER

For Stator

Winding and

Core

Temperature

VAJC VAJC

ANNUNCIATION BOARD

Recorder

F H Ø

V A A

Recorder


ANNEXURE-V

Ukai Hydro Power Station Unit No. 1 to 4 CT , PT and Relay Details

(A) Details for Current Transformer:

(i) Generator Neutral side CT details: CT-11

CORE MAKE CTR VA Acc. Class

Secondary

Resistance PURPOSE

1 Heavy

Elect. Ltd.

Bhopal

Standard:

BS 3938

5000/5A 60 CM 1.53 Instrument & Metering

2 5000/5A 60 S-10 1.53 46G (Negative Phase Sequence )

3 5000/5A 60 S-10 1.53 87G (Generator Differential)

4 5000/5A 60 S-10 1.7 87GT(Over all differential)

(ii) Generator Phase side CT details: CT-12

CORE MAKE CTR VA Acc. Class

Secondary

Resistance PURPOSE

1 Heavy

Elect.

Ltd.

Bhopal.

Standard:

BS 3938

5000/5A 60 C/S10 1.53 87G (Generator Differential)

2 5000/5A 60 C 1.53 AVR ( Y Phase Only)

3 5000/5A 60 S-10 1.53 40G (Field Failure)

21G ( Dist. Back Up)

(iii) 220 kV Side CT Details:

(a) Generator Transformer 220 kV Power House side CT (Unit No 1):- CT-17

CORE CTR VA Acc. Class PURPOSE Remark

1 250/1 A 45 10 P10 87GT (Over all differential)

64GTR(GT Restricted E/F )

ACT-11

0.96/2.89 A

2 250/1 A 10 10 P10 87L (Line differential)

(b) Generator Transformer Neutral Side CT details (Unit No.1):- CT-14

CORE CTR VA Acc. Class PURPOSE Remark

GT

Bushing CT 250/1 A 30 10 P10 64GTR(GT Restricted E/F )


(c) Generator Transformer 220 kV Power House side CT (Unit No 2, 3, 4):- CT-17

CORE CTR VA Acc. Class

PURPOSE Remark

1 250/1 A 45 S10

87GT- (Over all differential)

64GTR- (GT Restricted E/F)

ACT-11

0.96/2.89 A

2 250/1 A 10 S10

87L- (Line differential)

3 1000/1 20 S10

Line Drop Compensation –Y Phase

Secondary terminals

shorted at present.

(d) Generator Transformer Neutral Side CT (Unit No.2, 3, 4):- CT-14

CORE CTR VA Acc. Class PURPOSE

1 ------- ----- ----- W.T.I.- C.T

2 250/1 A 30 S10 64GTR (Restricted E/F )

(iv) Generator Transformer 220 kV Switch Yard CT: - CT-15


1 250/1 45 S10 51GI (Inter locked Over Current)

2 250/1 60 C Instrument & Metering

3 1000/1 20 S10 Bus Bar Differential Protection

4 250/1 10 S10 87L ( Line Differential )

(v) Unit Auxiliary Transformer HV Side Duct CT: - CT-13


1 100/1 A 20 S10 50/51 UAT (UAT Over current)

2 5000/5 A 60 S10 87GT (Over all differential)

(vi) Generator VT Details:

Sr. No V.T. VT Ratio Accuracy

Class Function

1 LAVT-C

VT-11

11kV/ √3/

110/√3 B

(I) Metering V , W , VAR , PF , F ,SYN , 25 ,

, V , Hz , KWh , Hour Meter

(II) Protection 27-Under Voltage

59-Generator Over Voltage

40-Loss Of Excitation

81-Frequency

21-Back Up Impedance

68-Fuse Failure

2 LAVT-C

VT-12

11kV/ √3/

110/√3 B AVR

3 Generator NGT 11 kV / 240 V ---- 64G S– Generator Stator E/F


ANNEXURE-VI Ukai Hydro Power Station Unit No. 1 to 4

Existing Relay Setting Detail

Sr. No.

Description Prot. No.

Relay Make

Relay Type Adopted Setting

1 Generator Differential 87 G EE CAG 34 0.5 Amp

2 Gen & GT O/A Diff. 87GT EE DMH31 Bias 30 %

3 GT HV REF 64 GTR EE CAG 14 0.1 Amp.

4 UAT O/C 50/51

UTR EE CDG

0.5 Amp , 0.1 Amp ,

High set = 4.0 Amp.

5 Gen. O/V 59 GA EE VDG 11 , PS = 132 V , TD = 0.2

Sec.

6 Inst. Over Voltage 59 GB EE VAG 154 V Fixed

7 Gen. Over Speed (inst.

O/V) 59G EE VAG 154 V Fixed

8 Inst. Under Voltage 27/40G EE VAG 77 Volts

9 Line Diff. Relay 87L EE CAG 34 0.2 Amp.

10 Negative Phase Seq. 46G EE CDN 31 Alarm 0.08 Amp ,

Trip 0.15 Amp. , TD = 0.4

11 Gen. Stator E/F 64 GS EE VDG 14 PS =5.4 V , TD = 0.2 Sec

12 Gen. Rotor E/F 64 R EE VME 21 1 mA

13 Field Failure Relay 40 G EE YCGF 11 Z1 = 1.5 Ohm , Z2 = 27

Ohm

14 Distance Back Up 21 G EE ZAUM 13 K1=0 , K2 = 3 ,Time = 5.0

Sec

15 Interlocked O/C Relay 51 G1 EE CDG 11 PS = 0.35 , TD = 0.1 A

16 Under / Over Frequency 81 G Siemens 7RW600

Alarm -48.5 Hz , 1 Sec

Trip 47.5 Hz , 5 Sec

O/F Trip 52 Hz , 5 Sec.

17 Fuse Failure Relay 68 GF EE VAPM 31 Fixed.


ANNEXURE-VII

Ukai Hydro Power Station Unit No. 1 to 4 Details for Generator, Generator Transformer & UAT

Sr. No.

Equipment Make Equipment Details Remark

1 Generator

Bharat

Heavy

Electricals

Ltd.,Bhopal

Type = G25 vertical umbrella type

salient pole,

Rating:- 83333 KVA, 0.9 p.f. 11 KV

(± 5 %) 3 phase , 4370 AMPS,

Rated KVAR 56000 at zero leading

P.F.

Xd=1.04 pu ,Xd’=0.31 pu ,

Xd’’=0.223 pu , Short Ckt. Ratio =

1.030

Stator resistance per phase at 200C

= 0.003415 ohm.

Field resistance at 200 C = 0.16

ohm.

Rotor excitation at no load & 100 %

voltage = 608 amp.

Rotor excitation at rated output &

voltage = 1052 Amp, Excitation

voltage = 180 Volts.

Speed = 150 RPM

2 Generator

Transformer

Bharat

Heavy

Electricals

Ltd.,Bhopal

MVA = 85

Voltage HV / LV = 11 kV / 229 kV

Ampere HV / LV = 246 / 5120 Amp.

Vector Group – Yd11

% Impedance = 11%

Type Of Cooling – OFW

No. Of Taps – 5

3 Unit

Auxiliary Transformer

Amul ,

Vadodara

MVA = 1

Voltage HV / LV = 11 kV / 415 V

Ampere HV / LV = 52.5/1390

Vector Group – Dy11

% Impedance = 5.48

Type Of Cooling – ON

No. Of Taps – 9


ANNEXURE-VIII-A Kadana Hydro Power Station Unit No. 3 / 4 Existing Protection scheme

220 KV Bus

Core-5 , PS , 200/1 CT-16 Core-4 , 5P20 , 200/1

Core -3 , 0.5 , 200/1 Metering

Core-2, PS , 200/1 B/B Prot. Main Zone. Switch Yard Core-1,PS , 200/1 B/B Prot. Check Zone.

Power House Core-4-200/1 AVR

Core-3 ----, 200-100/1 SPARE

CT-15 Core-2 , PS , 200/1 ICT

Core-1, PS , 200/1 11/229 KV

Metering 75 MVA GT 200/ 1,

CT-10 CT 14 , PS 0.5 , 100/5 R ICT ICT

CT-9, Core-2, 0.5 , 4000/5 Metering

CT-30 CT-9 , Core-1,5P10, 4000/5

100/5 CT-8 , 4000/5, PS

UAT CT-7 , Core-2, 5P10, 4000/5

ET

CT-7, Core-1,5P10, 4000/5

CT-5 4000/5 VT-3

Core -1 - 0.5 CT-6 Core-1 , 0.5

Core-2 , 5P10 ICT Core-2 , 5P10 VT-2

CT-4

PS ,4000/5 VT-1 AVR

11 KV

60MW , 11 KV

75000 KVA 0.8 PF

CT-3 , 0.5, Core-2, 4000/5 Metering

CT-3 Core-1, 5P10 , 4000/5

CT-2 Core-2, PS , 4000/5

CT-2 Core-1, PS , 4000/5 ICT

,

CT-1 PS , 300/5

89-N

NGR 0.4412 Ω , 288A, 220V

NGT: 11kV / 220V

25 kVA,

GUGI 136 SPEC 100/150 V , 12.5 Hz

G

60F1/F2 YWX+IWX 87 GT

DIX 110

64 G UBX 117

87 G

DIX 111

49G/M TGX 105

GT Diff. DTH 31

64S

GIX 103

87IT IBX 164

21 G

ZSX 102 27 BR

USX116

81 L

FCX

103 b

59 A/B

USX115

60G1 PUM22

60G2

PUM22

EHR

40G ZPX 103

27/40G USX 116

27/51 IUX 159

32G PPX 105b

98G ZPT RGX

46G IPX 146

32G1 PPX 111

87 L DIX 111

AVR

O/C CAG -CDG

GT REF CAG

LBB CTIG


ANNEXURE-VIII-B Kadana Hydro Power Station Unit No. 4 Proposed Protection scheme

220 KV Bus

Bus PT Core-5, PS , 200/1

CT-16 Core-4, 5P20, 200/1

Core -3, 0.5, 200/1 Metering

Core-2, PS, 200/1. B/B Prot. Main Zone. Switch Yard Core-1, PS, 200/1. B/B Prot. Check Zone.

Power House Core-4-200/1 AVR

Core-3 -, 200-100/1 SPARE

CT-15 Core-2, PS, 200/1

Core-1, PS, 200/1 11/229 KV

Metering 75 MVA GT 200/ 1,

CT-10 CT 14 , PS

0.5 , 100/5 R

CT-9, Core-2, 0.5 , 4000/5 Metering

CT-30 CT-9 , Core-1,5P10, 4000/5

100/5 CT-8 , 4000/5, PS

UAT CT-7 , Core-2, 5P10, 4000/5

ET

CT-7, Core-1,5P10, 4000/5

CT-5 4000/5 VT-3

Core -1 - 0.5 CT-6

Core-1 , 0.5

Core-2 , 5P10 ICT Core-2 , 5P10 VT-2

CT-4

PS ,4000/5 VT-1 AVR

11 KV

60MW , 11 KV

75000 KVA

0.8 PF

CT-3 , 0.5, Core-2, 4000/5 Metering

CT-3 Core-1, 5P10 , 4000/5 CT-2 Core-2, PS , 4000/5

CT-2 Core-1, PS , 4000/5

,

CT-1 PS , 300/5

89-N

NGR 0.4412 Ω , 288A, 220V

NGT: 11kV / 220V

25 kVA,

GUGI 36 SPEC 100/150 V, 12.5 Hz Note: - The bidder can suggest different scheme other than indicated here according to CT-PT input available in the

offered relay provided it should cover full scheme of protection as per requirement considering separate CT /PT input for protection as indicated

G

EHR

AVR

50/51 UAT CAG -CDG

LBB CTIG

87 G

59

99

81 U

81 O

64G2

64G1 87 IT

87 L

#

60F

27BR

87O

64GTR

50/51 GT

24

49

59

87GT 50/51

PROPOSED TRANSFORMER

PROTECTION

40, 32,

37, 94,

21,98,27,

51,49,50,

46


ANNEXURER – IX Kadana Hydro Power Station Unit No. 3/ 4 Existing Generator Relay Panel GA Drawing


ANNEXURE-X EXISTING CT DETAILS OF KADANA HEP Unit NO. 3/ 4

CT No.

CT Core

RATIO Class of

ACCURACY BURDEN Function

1 300/5 PS ……….. Gen. Inter turn protection

2 1 4000/5 PS 120 Overall Differential

2 4000/5 PS 120 Generator Differential

3 1 4000/5 0.5 120 BACK UP IMPEDENCE PROTECTION

2 4000/5 5P10 120 METERING


5 1 4000/5 0.5 120 CABLE DIFFERENTIAL RELAY87L

2 4000/5 5P10 120


2 4000/5 5P10 120

7 1 4000/5 5P10 120 (1) GEN. LOSS OF EXCITATION(2) Gen.

over current with voltage restrain

2 4000/5 5P10 120

(1) GEN. Reverse power protection(2) Gen.

Thermal over load protection (3) Gen Negative

Phase Sequence(4) Gen. pole slip protection



2 4000/5 5P10 120 METERING

10 100/5 0.5 ……….. Exc. Transformer

14 200/1 PS ……….. GT REF protection

15 1 200/1 PS ……….. GT REF CAG

2 200/1 PS ……….. Overall Differential

3 SPARE

4 200/1 FOR

AVR

16 1 200/1 PS ……….. Bus Bar Protection check zone

2 200/1 PS ……….. Bus Bar Protection main zone

3 200/1 0.5 60 Metering

4 200/1 5P20 60 LBB CTIG

5 200/1 PS ……….. GT Differential DTH 31

30 100/5 PS UAT Transformer


ANNEXURE-XI

GRP Relay and Setting DETAILS OF KADANA HEP Unit NO. 3/ 4

Relay Detail

Sr.

No. Existing protection

Prottection No.

Make Type Setting

1 Split Phase Over Current 87IT HBB IBX 164 PICK UP SETTING = 4.0 Amp

TIME DELAY = 4.0 SEC

2 Overall Differential 87GT HBB DIX 110

BASIC SETTING % g = 20% = 1.0A

(Min. Setting)

BIAS SETTING % v = 30 %

3 Generator Differential 87 G HBB DIX 111

Basic Setting %g = 10% (Min

Settings) [0.1*In = 0.1* 5 = 0.5A

(500mA)]

Bias Setting %v = 25% (Max.

Setting)

4 Bach Up Impedance 21G HBB ZSX 102 2.0 Ohm (FOR ALL THREE PHASE)

TIME DELAY: 1.5 Sec

5 Thermal O/L Generator / Motor 49G/M HBB TGX 105 1.04*In = 1.04 * 5 = 5.20Amp

6 Cable Differential Relay 87L HBB DIX 111

BASIC SETTING %g = 10 %( Min.

SETTING)

BIAS SETTING %v = 25 % (Max.

Setting)

7 Loss Of Excitation 40G HBB ZPX 102

PICK UP SETTING a1 = 70%

DROP OUT SETTING a2 = 35%

TIME DELAY = 0.5 SEC

8 Gen. Over current with voltage restrain 27/51 HBB IUX 159

DELAYED SETTING : 1.1* In

TIME DELAY: 1.5 Sec

INSTANTANEOUS SETTING: Max.

UNDER VOLTAGE SETTING: 80%

9 Gen. Reverse Power (Gen. Mode) 32G1 HBB PPX 111

POWER SETTING % PN = 0.5%

(P1=0.5, P2= 0)

TIME DELAY: ST-I (t1) = 5.0Sec,

ST-II (t2) = 5.0Sec 3WM , MAX

10 Over Power (Motor Mode) 32G HBB PPX 105b

POWER SETTING % PN =

1.0%(Min. Setting)

TIME DELAY t1 ST-I = 0.5

Sec(Min. Setting)

TIME DELAY t2 ST-II = 5.0

Sec(Min. Setting)

11 Gen. Thermal Over load 50 OL HBB

12 Gen. Negative Phase Seq, 46 G HBB IPX 146

K1 = 21, K2 = 10, K2 (START) =9.3

* 1.732 ≈ 16

Cooling Tr = 45 SEC

13 Gen. Pole Slip Prot. 98G HBB ZPT 408

NA = 61% TO 10%

NB = 23% TO 4%

NC = 67% TO 5%

œ = 90° TO 90° i.e.0

Q = 75° TO 75° i.e. 1


PROTECTION DETAILS OF KADANA HEP Unit NO. 3/ 4

Relay Detail

14 Under Frequency Relay 81L HBB FCX 103

(a) STAGE –C (ALARM)

Frequency Settings: - 48.0 HZ

Time Delay: - 1.5 SEC

(b) STAGE – D (TRIP)

Frequency Settings: - 47.5 HZ

Time Delay: - 5 SEC

15 100% Stator E/F Relay 64S HBB GIX 103 PICK UP SETTING: 25 mA

16 95% Stator E/F Relay 64G HBB UBX 117 PICK UP SETTING = 2.64 %

TIME DELAY = 0.5 Sec (FIXED)

17 Generator Under Voltage Relay 27/40 G HBB USX 116

(a) Delayed Trip: - 85% * Un =

0.85*110=93.5V

(b) TIME DELAY: 0.5 Sec

18 Rotor Earth Fault relay

60F1 HBB IWX 161

+ YWX

111

FAULT RESISTANCE Rf = 5 KΩ

TIME DELAY = 1.0 Sec

60F2 HBB FAULT RESISTANCE Rf = 3 KΩ

TIME DELAY = 0.5 Sec

19 Under Voltage Dynamic Breaking

Relay 27 BR HBB USX 116

85 % of Un (Max. Setting 80 %)

Time delay = 0.5 Sec

20 Generator Over Voltage

59A HBB USX 115 Delayed Trip 1.15 * Un= 1.15 * 110

= 126.5V, Time Delay t =1.0Sec

59B HBB USX 115

Instantaneous: - 0 (minimum) Trip: -

1.30Un = 1.30 * 110 = 143.0V

INST.

Generator Transformer Protection

21 GT Differential Protection 87GT EE DTH 31 % BIAS = 30 %

22 GT REF Protection 64R EE CAG34 PLUG SETTING = 0.10 AMP

SR = 100 Ω

23 LBB 50 Z EE CTIG

PLUG SETTING: 0.05 * 1 = 0.05A

(50 mA)

TIME DELAY (t) = 0.25 SEC =250

mSEC

24 GT Over flux 99GT EE GTT21 K=1.2 t =12 SEC

25 UAT Inst. Over Current 50 UAT EE CAG37 IA=IB=IC =10AMP

26 UAT IDMTL Over Current 51 UAT EE CDG 31 P.S. =2.0A, TMS = 0.1


ANNEXURE - XII

PROTECTION and CT / VT DETAILS OF KADANA HEP Unit NO. 3/ 4

Relay Detail CT / VT Detail

Sr.

No. Existing protection

Prottection No.

Make Type VT No.

CT No.

CT Core

RATIO Class of

ACCURACY

1 Split Phase Over Current 87IT HBB IBX 164 1 300/5 PS

2 Overall Differential 87GT HBB DIX 110 2 1 4000/5 PS

15 2 200/1 PS

3 Generator Differential 87 G HBB DIX 111 2 2 4000/5 PS

4 4000/5 PS

4 Bach Up Impedance 21G HBB ZSX 102 VT2 3 1 4000/5 5P10

5 Thermal O/L Generator / Motor 49G/M HBB TGX 105

6 Cable Differential Relay 87L HBB DIX 111 5/6 2 4000/5 5P10

9 1 4000/5 5P10

7 Loss Of Excitation 40G HBB ZPX 102 VT3

7 1 4000/5 5P10 8

Gen. Over current with voltage

restrain 27/51 HBB IUX 159

9 Gen. Reverse Power (Gen. Mode) 32G1 HBB PPX 111 VT3

7 2 4000/5 5P10

10 Over Power (Motor Mode) 32G HBB PPX

105b VT3

11 Gen. Thermal Over load 50 OL HBB

12 Gen. Negative Phase Seq, 46 G HBB IPX 146

13 Gen. Pole Slip Prot. 98G HBB ZPT 408 VT3

14 Under Frequency Relay 81L HBB FCX 103 VT2

15 100% Stator E/F Relay 64S HBB GIX 103 VT2 Separate Injection Transformer (GUGI)

16 95% Stator E/F Relay 64G HBB UBX 117 NGT

17 Generator Under Voltage Relay 27/40 G HBB USX 116 VT3

18 Rotor Earth Fault relay 60F1 HBB

IWX 161

+ YWX

111

VT2

60F2 HBB

19 Under Voltage Dynamic Breaking

Relay 27 BR HBB USX 116 VT2

20 Generator Over Voltage 59A HBB USX 115

VT2

59B HBB USX 115

Generator Transformer Protection

21 GT Differential Protection 87GT EE DTH 31 8 4000/5 PS

16 5 200/1 PS

22 GT REF Protection 64R EE CAG34 14 200/1 PS

15 1 200/1 PS

23 LBB 50 Z EE CTIG 16 4 200/1 5P20

24 GT Over flux 99GT EE GTT21

25 UAT Inst. Over Current 50 UAT EE CAG37 30 100/5 PS

26 UAT IDMTL Over Current 51 UAT EE CDG 31


ANNEXURE- XIII

The detail of Unit No. 3/4 in generator mode and motor mode

Sr.no Generator Particular Rating

Generator 1 Capacity 75 MVA

2 Voltage 11 KV

3 Current 3940 Amp

4 Power factor 0.85 lagging

5 Rotation Clockwise

6 Excitation voltage 257 volt

7 Speed 142.8/283 rpm

8 Frequency 50 C/S

9 Phase 3(Three)

10 Connection STAR

11 Insulation Class F

12 Type SV 820/165/42

13 Make BHEL

Motor Mode 1 MW 65

2 Power Factor 0.97 Lead

3 Voltage 11 KV

4 Current 3600 Ampere

5 Rotation Anticlockwise

6 Excitation Current 1320 Amp.

Detail of the Generator Transformer

Make: - TELK

Type: - SAFLOCR, Form: - 3NYCP

KVA: - H.V. Side- 37500/52500/75000

L.V. Side- 37500/52500/75000

Volt: H.V.: 229 KV

At No Load L.V.: 11KV, Impedance Voltage: - 11.78%

Ampere: H.V.: 94.7/133/189

L.V.: 1971/2759/3941

Connection Symbol: YND11

No. OF Phase:- 3, Frequency:- 50Hz

Makers Sr No.:- 130110-2, Year of Manufacturing: - 1995

Type of Cooling: - ONAN/ONAF/DDAF

Detail of the Excitation Transformer

Make: - BHEL, Zansi

Type: - Dry Type Resin Cast

KVA: - 830

Volt: H.V.: 11 KV

L.V.: 370 V

Basic Input Level: - 75 KV

Connection Symbol: DYN5

No. OF Phase: - 3, Frequency: - 50Hz


Detail of the Unit Auxiliaries Transformer

Make: - Vijay Electrical Ltd., Hyderabad

Type: - Dry Type Resin Cast

KVA: - 500

Volt: H.V.: 11 KV ± 2.5% ± 5%

L.V.: 415 V

Impedance Voltage: - 5.16%

Ampere: H.V.: 26.24 A

L.V.: 695.6 A

Connection Symbol: DYN11


Class of Insulation: - H

Type of Cooling: - AN

Detail of the Neutral Grounding Transformer

Make: - Prayag Electrical Pvt. Ltd.

KVA: - 25 KVA (5 Minute)

Ratio:- 11KV/220V

Rated Voltage: - 12KV, Type: - Dry Type

Insulation Level: 35/75 KV


Class of Insulation: - B

Detail of the GUGI Transformer

Make: ABB

Voltage Ratio: - 100 V/150V

Rated Current: 1 A/0.667A

VA Rating(Thermal) : 100 VA

Rated Freq:- 125 Hz


SECTION IV: SCHEDULES

CONTENTS

Sr. No.

DESCRIPTION PAGE NO.

1.0 Prices and Delivery(Un priced) 53

2.0 General Particulars of Bidder. 54

3.0 Guaranteed Technical Particulars. 55

4.0 Deviation from Technical Specifications. 62

5.0 Performance and Experience Details.. 63

6.0 Largest Quantity order executed. 64

7.0 List of Documents submitted with the Bid. 65


SCHEDULE: 1

(This shall be furnished with the price bid filled in with prices and

unpriced shall be furnished with the Technical bid)

Sr.No. Description Qty. Unit Ex.

works

Prices

(Excl.taxes

and

Duties)

Total Ex.

works

prices

(excl.taxes

and

duties)

Inland

freight

and

Insurance

Total

FOR

prices

(Excl.

taxes

and

duties)


SCHEDULE - 2

GENERAL PARTICULARS OF BIDDER

1 Name of Bidder with registered office

address

2 Bidder’s proposal number and date

3 Telegraphic / Telex Address

4 Telephone No.

5 Fax No.

6 E – Mail

7 Name and Designation of the Official

of the Bidder to whom all reference

shall be made

8 Project organization chart showing

staffing, furnished?

Yes / No

9 List of important personnel with brief

curriculum vitae, furnished?

Yes / No


SCHEDULE – 3

GUARANTEED TECHNICAL PARTICULARS

(TO BE FILLED IN BY THE BIDDER -FURNISH WITH TECHNICAL

BID) The GTP is to be filled up in this format and, to be submitted in duplicate

along with the offer. The Bidder shall fill in the particulars against

appropriate items in respect of each rating and type of equipment offered

in the broad categories listed below.

I GENERATOR PROTECTION RELAY PANEL

Ukai

Hydro

Kadana

Hydro

A PANEL

1. Make

2. Panel Details

1. Type of panel (Simplex/ Duplex)

2. Equipment mounted on which side of the

panel

3. No. of doors and on which side of the panel.

4. Thickness of sheet steel

(a) Front

(b) Door Frame

(c) Base Frame

(d) Side

(e) Cubicle roof

(f) Door

5. Overall dimensions of each panel (width x

Depth x

Height) mm

3. Details of painting

1. IS `Code of Practice for phosphating iron and

steel’ in which accordance the sheet steel work

is done.

2. Shed no. and IS of colour.

3. Paint thickness

4. Largest package by transport

(1) Gross weight


(2) Overall dimensions

5. GA drawing no. attached.

6. Mounting details

7. Other details, if any.

B PANEL WIRING

1 Insulation grade and type

2 It shall be single core multi strand flexible wire

3 Conductor used (Copper or Aluminum)

4 Size of wiring conductor for following.

1) PT Circuits

2) CT Circuits

3) DC supply circuits

4) Other circuits

5 Colour code of wiring for following.

1) PT Circuits

2) CT Circuits

3) CVT Circuits

4) DC supply circuits

5) Other circuits

6 Type of Lugs, Sleeves and Ferrules to be used

for

panel internal wiring.

C TERMINAL BLOCKS

1 Make

2 Construction details

3 Voltage grade

4 Current rating

5 Type of TB for CT, CVT, PT wiring and other

wiring.

6 No. of spare terminals.

D EARTHING

1 Conductor or material used for earthing

2 Size of the earthing conductor

3 Colour and size of the wire used for earthing of

different devices in the panel to the earthing bar.

E CIRCUIT LABLE

Material size and color.

F AUXILIARY RELAYS

Make

Type & Designation

Mounting (Flush/ Semi Flush & on Front/ Rear)

Nominal voltage and % variation

Contacts (hand reset/self reset)


No. of pairs of contacts

i) Make contacts

ii) Break contacts

Speed operation of relay

Pick up / drop off ratio

Burden of relay – VA

(i) Contact rating

(ii) Voltage

(iii) Making current and duration

(iv) Breaking current

a) Resistive

b) Inductive 0.3 PF

c) Inductive L/R 10m sec

40m sec

Detailed literature furnished.

Standard

G TRIP CIRCUIT SUPERVISION RELAYS

1 Make

2 Type designation

3 Rating

4 i) Operating principal

ii) Literature write-up enclosed.

5 Minimum voltage for satisfactory operation.

6 Burden

7 Monitoring of breaker trip coil in both open and

close position provided.

8 Safety resistor provided to limit the current if the

relay coil is short circuited.

9 Output contacts

i) No. of NO/NC contacts

ii) Rating of contacts

10 Time delay on drop off

11 Type of indication

12 Standard

13 Any other relevant details.

H TRIPPING RELAYS

1 Make

2 Type designation

3 Rating

4 Operating time at rated voltage.

5 Relay suitable for being continuously monitored.

6 Hand reset/self reset contacts

i) No. of NO & NC contacts

ii) Rating of contacts.

7 i) Operating principal

ii) Literature write-up enclosed.


8 Standard

9 Any other relevant details.

I All aux. relays for the scheme provided.

J All external resistors as required provided.

K Manual online testing facility provided through

test plug without isolation of any circuit from

panel TB.

II GENERATOR PROTECTION RELAY

1. Make

2. Type Model No.

3. Whether Numerical measurement.

4. Auxiliary DC Voltage

5. CT input, specify whether selectable at site.

6. Specify Type of Relay, Logic , range of setting &

availability of following Protection

A.- Generator Protection Relay

1) Differential protection-87G.

2) Impedance Protection by Distance

protection Zones- 21G

3) Negative phase sequence protection -

46G

4) Loss-of-Excitation protection with

provision for instantaneous trip-40G.

5) Pole Slip Protection- 98G

6) Low forward power protection -37G

7) Reverse power protection- 32G

8) Thermal Over Load protection- 49 G

9) Over Current Protection -50 O/L

10) Dead Machine protection- 94G

11) 100 % Stator earth fault protection (both

0-95% and 0-100%) -64G1.

12) 95 % Stator earth fault Protection- 64

G2

13) Inter Turn Protection -95G

14) Generator over voltage protection

-59G.

15) Over and under frequency protection-

81GU & 81O

16) Rotor Earth Fault Protection-64 GR

17) Non Directional back –up Over Correct

Protection- 51GT

18) Generator Under Voltage Protection

27G

19) Over-flux protection-99GT


20) Non Directional back up neutral over-

current protection- 51GTN

21) Any other protection to specify

B.- Generator Transformer Protection Relay

1) Over All Differential Protection – 87 GT

2) Restricted Earth Fault Protection – 64GR

3) Any other Protection to specify

C.- Generator Transformer Over Current Protection

1) Non Directional Back up Over Correct

Protection- 51GT

2) Non Directional Back Up Neutral Over

Current Protection – 51NGT

D. Line Differential Protection.

Any other protection should specify

Literature attached

III

Function / Features of relay Generator Prot. Relay

Transformer Prot. Relay

Other offered relay

1 Make , Type and Model No.

2 Auxiliary DC Voltage

3 CT input, specify whether

selectable at site.

4. Programmable scheme logics.

Nos. of ‘AND’

Logic scheme.

Nos. of ‘OR’

Logic scheme.

No of other logic

scheme

5 Burden at CT and VT input

6 No. of setting Groups.

7 Whether Trip Circuit

supervision in built.

8 CB Monitoring facility

9 Operating Time

Other features of relay

10 No. of Binary inputs with

rating

No. of Binary Out put with

rating

11 Out put relays with contact

configuration.


# Fixed

# Programmable

12. Out put relay contact rating

Make and carry continuous

Make and carry for 0.5 S.

13. Display type and character.

14. LEDs

Fixed

Programmable

15. Communication

Whether suitable for any

communication scheme.

Communication Protocol

available

Front port Type & No.

Rear Port Type & No.

Time synchronization ,

Specify port and method.

16. Facilities through HMI ,

Setting , Parameterization ,

DR Evaluation etc.

17. Disturbance recorder

Sampling Freq.

Total Duration of fault

recording.

Pre fault and post fault

time.

No. Of records.

Duration of each record

No. of analog channel.

No. of digital channel

18. Fault records

No. of faults.

19. Events recording capacity.

20. Self supervision facility.

21. Relay housing

Flush / Projected

Degree of protection

22. Terminal Type

CT terminal

Other connections

23. Temperature and humidity

Ambient temp.

Relative humidity

Operating Range.


Storage Temp.

24. Name of Software and purpose

which will be supplied with

relay.

25. Other additional inbuilt

function of the relay to specify.

26. Any other information

27. Literature attached.

III SCADA (Without control) and DR Work Station

1. Software offered.

2. Make

3. Type / Version No.

4. OS Platform

5. List feature / facility of the system offered.

Literature attached.

6. Type of Database used.

7. Capability of software to create user defined

screens / sketch linked to data point.

8. List interfacing equipments for external input

(Binary and analogue) with make , type

9. Capacity of no. of inputs

-Binary

-Analogue

10. Capacity of Expansion indicating no. of inputs

-Binary

-Analogue

11. Protocol used

12. Suitability of the system to interface with relays of

other make, Specify.

13. Specification of Interfacing equipments offered

14. Network schematic attached offered for complete

scheme.

15. Specification of PC offered. (should be of latest

configuration)

16. Type of OS and Antivirus offered.

17. Dimension of Panel and IT rack offered.

18. Panel Drawing attached

19. UPS make , model , rating , capacity , backup time

20. List of Material required for the system with qty. ,

rating , make , model , specification etc.

21. Any other detail to furnish.


SCHEDULE - 4

DEVIATIONS FROM TECHNICAL SPECIFICATION All the deviations from this specification shall be set out by the bidder,

clause by clause, in this schedule. Unless specifically mentioned in this

schedule, the bidder shall be deemed to confirm to the specification.

Reference Section and

page

Description of Exceptions / Deviations

Reason for Exception / Deviation


SCHEDULE - 5

PERFORMANCE AND EXPERIENCE DETAIL

Bidder shall furnish here a list of similar orders executed/under execution by him

and name of persons to whom the reference may be made by the Purchaser in

case he considers such reference necessary.

Sl. No.

Name of the Purchaser / Owner with full address

Location of the Plant / Equipment

Date of Commission

ing

Performance Certificate submitted (Yes/No)

Details of Equipment supplied &

installed

Person to whom

reference be made


SCHEDULE-6

LARGEST QUANTITY ORDER EXECUTED

Sr.

No.

ITEMS

SUPPL

IED TO

ORDER

REFEREN

CE NO. &

DATE

ITE

MS

QUANTI

TY

ORDER

FULLY

EXECUT

ED

YES/NO

STATUS

IF

ORDER

UNDER

EXECUTI

ON

REMAR

KS


SCHEDULE - 7

LIST OF DOCUMENTS SUBMITTED WITH THE BIDS

Documents Title and Description