140

SECTION V

ELECTRICAL SPECIFICATION

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SR NO

SECTION

PAGE NO

S-1

SPECIFICATIONS OF HT PANEL

141

S-2

SPECIFICATIONS OF TRANSFORMER

143

S-3

SPECIFICATIONS OF L. T. PANEL & SWITCHGEAR.

150

S-4

SPECIFICATIONS OF EARTHING INSTALLATION

169

S-5

SPECIFICATIONS OF HT & LT CABLES

171

S-6

SPECIFICATIONS OF POINT WIRING.

177

S-7

CIVIL WORK & SCOPE OF ELECTRICAL

CONTRACTOR

184

S-8

TEST TO BE CARRIED OUT

185

S-9

GENERAL TERMS & CONDITIONS OF THE CONTRACT

187

S-10

APPROVED MAKES FOR ELECTRICAL SYSTEM

197

141

S - 1

SPECIFICATIONS OF HT PANEL

1.0 33 / 22 /11 KV SF6 VCB UNIT

33 / 22 /11 KV, 800A, 25kA Horizontal Draw out Indoor SF6 V.C.B. Switch board fitted

with Manual / Motor operated spring charging mechanism, with 230V AC Motor shunt

trip coil of 30V DC, Closing coil of 30V DC, Aux. Contac 4NO+ 4NC (enhanced to

6NO+6NC by using contact multipliers.)Mechanical ON/OFF indicator and push button,

mechanical operation counter, anti - pumping relay / arrangement. and incoming and

outgoing cable boxes, with following :

- SF - 6 Load Break VCB Switch with mechanical ON / OFF / EARTH

Operations.

- Live line indicators METERING: V&I, ANNUNCIATION

- Shunt trip 230 VAC

- Internal Earth Switch

- 4 No. + 4 NC Auxiliary Contacts

- Anti - reflex Handle

- PTR: 22 /11 KV /Rt.3, 110VA/Rt.3, Ratio-3 Nos

- CTR : As per Customer Specifications.-3nos

- 2O/C+1E/F Relay (CDG31), Master trip relay (VAJH13), Trip Circuit

Supervision Relay.

- Power pack

- CONTROL SWITCHES/PUSH BUTTONS.

142

2. 33 / 22 /11 KV SF6 GAS FILLED LOAD BREAK SWITCH UNIT

22 KV SF6 filled type load break Switch fuse unit with following

accessories:

- SF - 6 Load Break Switch fuse unit with mechanical ON / OFF / EARTH

Operations.

- Live line indicators

- Shunt trip 230 VAC

- Internal Earth Switch

- 4 No. + 4 NC Auxiliary Contacts

- Anti - reflex Handle

- HRC Fuses -3 Nos

143

S- 2

SPECIFICATIONS OF TRANSFORMER

1.0 SCOPE:

This specification covers the requirements of design, manufacture, testing, supply,

packing & forwarding, transportation and supervision of erection and commissioning of

outdoor type, distribution transformer.

2.0 SITE CONDITIONS :

� Altitude above MSL :

� Temperature :

� Humidity :

� Atmosphere :

3.0 BASIS OF DESIGN :

The transformer should have off load tap changing facility.

4.0 ELECTRICAL SUPPLY SYSTEM :

� H.V. Side :

� L.V. Side :

� Fault Level :

5.0 STANDARDS :

The transformer and its accessories shall conform to the requirements of the latest

editions of the relevant Indian Standards, but not limited to the following.

� IS-2026 (Part I to IV) : Power Transformers.

� IS-3639 : Fittings and Accessories for Power Transformers.

� IS-6600 : Guide for loading of oil immersed transformers.

� IS-335 : Insulating oil for transformers and switchgear.

� IS-3837 : Dimensions for Porcelain Transformer Bushings.

� IS-1271 : Classification of insulation materials.

� IS-2090-1973 : Bushing for alternating voltage above 1000V.

� IS-3639-2966 : Fitting and accessories for power

transformers.

� IS-8183-1976 : Bonded material.

� IEC-76 : Power transformer.

144

� IS-2705 : Current transformer

� IEC-216(part-3) : Guide for determination of thermal endurance

Properties of electrical insulating material.

� IS:2099 : High voltage porcelain bushing sereen.

� IS :3347 : Dimension for porcelain transformer bushing.

� IS : 10028 : Code of practice for selection, installation and

maintenance of transformer.

� CBIP Manual on transformer-1987

6.0 CONSTRUCTION :

� Transformer tank shall be of welded sheet steel construction and provided with gaskets

&steel cover plates. Base shall be suitably reinforced to prevent any distortion during

lifting. A suitable wheel shall be provided on base channel, so that transformer can be

placed on broad-gauge rail. All covers and seals for the tank shall be oil and airtight and

shall not be affected by mineral or synthetic oil action. The tank should have drain valve

(Diameter of the valve should be in such a way that 90 % of the oil should drain in 10

minutes). The air release plug shall be provided on the tank. Pocket for Oil temperature

indicator (OTI) and Winding temperature indicator (WTI).

The magnetic circuit of the core shall be constructed from high-grade cold-rolled grain

oriented low loss silicon steel (silicon percentage should not be more than 4%)

lamination. The lamination shall be painted with suitable resin to protect it against corrosion. The core shall be designed in such a way that core shall not get saturated by

2.2 tesla. The insulation between core to bolts and core to fixing clamp should withstand

as per IS standard.

� The coil of copper winding should have minimum insulation level of class A. The

winding is subjected to shrinking and seasoning process, so that further shrinkage should

not be possible during service condition. The insulating material used for the winding should be non-inflammable, non-hygroscopic and void free properties. The winding shall

be in such a way that over-all percentage impedance of the winding shall be 6.25% with

tolerances as allowed by us.

The transformer oil should have all the properties conforming to IS 335.

� Conservator tank:

It shall comprise of glass level indicator, silica gel breather and Oil surge relay with necessary potential free auxiliary contact.

� H.V Termination:

H.V side suitable for HT Aluminium XLPE cable termination with Ray-chem Type heat

shrinkable termination kit. HV cable box shall be provided with disconnecting chamber. The

cable box shall be weatherproof to IP-55. For fixed portion of the cable box, inspection cover

with lifting handle shall be provided.

� L.V Termination :

The L.V terminal flange shall be suitable for amp & 433 V TPN aluminium bus. Terminal

chamber for termination shall have a gasketed cover plate bolted to it and shall be weather

145

proof to IP-55. A separate inspection cover with lifting handle shall be provided to facilitate

connection and inspection.

An additional Neutral bushing to be provided for connection to ground with 2 Nos. of 50 x 6

Cu. strip.

� Radiators equipped with air vent, drain plug and lifting lugs shall be provided. Radiators

shall be securely braced to prevent undue vibration and shall have detachable type. These

radiators shall be provided with cut–of valves to permit removal of any radiator unit without

emptying the tank.

� All fasteners, bolts, etc shall be galvanised or zinc passivated. All surfaces to be painted shall

be thoroughly cleaned, de-scaled, made free from dust and given two primer coats of rust

resisting paint followed by two finishing coats of approved shade. Type of paint shall be

epoxy (Painting thickness Min. 120 Microns).

� EARTHING:

All doors and removable parts shall be earthed. The provisions for earthing of main

transformer tank, OLTC tank and HT side cable box shall be provided. Different parts of

transformers shall be connected by copper flexible for earth continuity purpose.

7.0 TERMINALS :

� HV side shall be suitable for connecting HT XLPE cable

& LV side shall be suitable for connecting suitable Amp cables.

� Primary winding terminals and secondary winding terminals shall be located at 180o.

8.0 COOLING :

Type of cooling shall be ONAN.

9.0 OIL : The transformer shall be supplied with first filling of oil. 10% extra oil for topping up

shall be supplied free of cost.

10.0 ACCESSORIES :

Accessories as specified in the Data Sheet shall be included in the scope of supply.

Following points shall specifically be noted.

� Conservator shall be complete with oil filling plug and cap, oil drain valve & purging

device. The oil drain point shall be brought down to a lower level by an extension pipe.

� Explosion vent shall be able to rotate in all directions and provided with sight gauge,

equaliser pipe connection and double diaphragm.

� Bottom drain valve shall be of suitable diameter so as to drain off 90% of the oil in ten

minutes.

� Thermometer pocket shall be complete with mercury in glass thermometer

(0-120ο C).

� Jacking pads and two sets of lifting lugs - one for complete transformer and other set

for top cover with core and coil assembly shall be provided. Tank shall be designed

146

for full vacuum and shall be pressure tested.

11.0 CORE AND WINDINGS :

� Transformer shall be double wound, core type with cold rolled grain oriented (CRGO) laminations perfectly insulated and clamped to minimise vibration and noise. Care

should be taken to insulate core fastening bolts to reduce losses and avoid hot

points. All parts of magnetic circuit shall be bonded to earth system.

� Windings shall be of copper and shall be designed to withstand the specified thermal and

dynamic short circuit stresses.

12.0 NOISE :

� The noise level of the transformer shall not exceed 5 db above NEMA standard of over

85 db.

13.0 INSPECTION AND TESTING :

� These tests shall be performed on the complete assembly at Bidders works. Test

certificates duly signed by Purchasers representative shall be issued as part of final

document.

� The following test shall be carried out on the transformer.

� Dimensional check.

� Functional check on all the devices mounted on the transformer.

� No load test and short circuit test for conforming transformer losses.

� High voltage test on HT side & LT side

� Double frequency test and temperature rise test.

� BDV test of the oil.

� Polarity and voltage ratio test.

� Any other test as per relevant standard.

� Erection / Maintenance Documents before despatch. (4 Copies each)

� G.A. Drawings showing plan, elevation and end view complete with all

dimensions. Vendor to mark distance from bottom of rollers to HT bushing-live part in G.A drawing.

� HV cable box details.

� LV connection details.

� Rating and diagram plate details.

� Four sets of Routine Test Certificate and Erection and Maintenance. Manual shall

also be submitted for Purchasers reference and records before despatch of the

transformer.

147

15.0 SPECIAL REQUIREMENT FOR TRANSFORMER:

� The transformer shall be offered with detachable type of radiators.

� An extra neutral bushing shall be provided on the outside of the LV box for grounding of the transformer neutral. 2 Nos. 50 x 6 mm Copper strips. Strips from this bushing shall

be brought down upto the base of the transformer duly supported on 1.0 KV grade pin

type insulators.

16.0 LOSS EVALUATION:

The transformer will be tested in accordance with clause 11.0 above. Vendor shall be

penalised if no load losses and load losses are in excess of figures guaranteed by him. If

the losses during routine test witnessing are found to be more than the figures committed

by the vendor, he will be penalised.

17.0 PACKING :

Equipment shall be despatched to site packed in wooden case. It shall be wrapped in

polythene sheets before putting in cases and it shall be ensured that damage to the

equipment does not occur during handling/transportation. Suitable arrangement shall be

provided for unloading at site.

18.0 GUARANTEE :

The equipment shall be guaranteed for trouble free operation for a period of 12 months

from the date of handing over.

Any defect due to faulty material/ bad workmanship shall be rectified free of cost to the

entire satisfaction of the purchaser.

Performance Guarantee runs shall be conducted after one month of continuous trouble free operation.

All guarantees from equipment suppliers will be vested in the client.

\

148

DATA SHEET FOR DISTRIBUTION TRANSFORMER

19.0 TECHNICAL PARTICULARS :

1.0 RATING : KVA

2.0 VOLTAGE RATIO : / 433 Volts.

3.0 TEMP RISE : 400 C (in oil by Thermometer) and 550 C

in winding by resistance ( Temp. rise above 500

C peak ambient temp. )

4.0 HUMIDITY : 100 %

5.0 IS SPECIFICATIONS : Design : IS : 2026 of 1977

( Latest Amendments ) Loading : IS : 6600 of 1972

Transformer Oil : IS : 335 of 1972

Transfomer Bushings : IS 3347

6.0 NO OF PHASES : 3 (Three)

7.0 CONNECTIONS :

7.1 H.V. : Delta

7.2 L.V. : Star with Neutral separately brought out.

Through Bushing

7.3 Vector Group : Dy n 11

8.0 TYPE OF COOLING : ONAN

9.0 TAP CHANGER : OFF LOAD Tap changer with

+ 10% taps in steps of 2.5 %

10.0 WINDINGS : Electrolyte Copper

11.0 TERMINATION ARRANGEMENTS :

11.1 H.V. : Cable Box Suitable Cable.

11.2 L.V. : L V Cable Box with suitable bushings

& Bus-bars (with proper hylum support)

Brought out inside cable box

LV Neutral : Brought out through bushing for earthing.

12.0 ARCING HORNS : Double gap type

13.0 FITTINGS & ACCESSORIES

13.1 : Oil Conservator with Oil Level Gauge.

13.2 : Silica Gel Breather with connecting pipe

and oil seal.

149

13.3 : Explosion release vent with double

Diapharm.

13.4 : Cover lifting eyes.

13.5 : Air release plug in top cover.

13.6 : Thermometer pocket for Thermometer,

with loose Thermometer.

13.7 : Drain cum/sampling Valve with threaded

adaptor & Plug.

13.8 : 2 Nos. Filter Valves with threaded

adaptor & plug, at top and bottom

( 1No. each )

13.9 : 2 Nos. Earthing Terminals.

13.10 : Lifting arrangements.

13.11 : 4 Nos. Unidirectional rollers.

13.12 : Rating and Diagram Plate.

13.13 : First filling of coil and in addition 10%

extra quantity for topping ( to nearest

drum dize ).

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150

S- 3

A) SPECIFICATIONS OF L. T. PANELS & SWITCHGEAR

1.0 SCOPE

This specification covers the design, manufacture, shop floor tests, type and routine tests

and delivery of indoor LV switchgear of voltage rating 440 Volts. For quantity, type of

breaker, short time rating and other specific details.

The equipment to be offered under this specification shall be of proven design further, the

switchgear must have been type tested in the same configuration that has been offered.

2.0 GENERAL SPECIFICATION:

2.1 STANDARDS:

In general the equipment shall conform to all relevant IS/IEC standards. In case of any

contradiction between the IS/IEC and this specification, the more stringent of the two

shall apply.

a) IS 1248 & 3107 - Direct acting Electrical indicating instruments

b) IS 2959 - AC contactors up to 1000V

c) IS 13947 - AC Circuit Breakers

d) IS 2705 - Current Transformers

e) IS 3156 & 4146 - Potential Transformers.

f) IS 4047 - Specification for air break switches and

combination fuse

Switch units for voltage not exceeding 1000V.

g) IS 6875 - Control switches for voltages up to and

including 1000V AC and 1200V DC.

h) IS 1822 - Motor duty Switches

i) IS 12021 - Specification for control transformer.

j) IS 8623 - Factory built assembly of switchgear & control

gear for voltage not exceeding 1000V

k) IS 13947 (Part I) - Degree of protection for enclosure

l) IS 3842 - Specification for electrical relays for AC system

m) IS 2208 & 9224 - Specification for HRC fuses.

n) IS 5082 - Wrought Al. and aluminium alloys, bars, rods,

tube and sections for electrical purposes.

o) IS 4237 - General requirement for switchgear & control

gear for voltage not exceeding 1000V.

p) IS 3231 - Electrical relays for power system protection

151

q) IS 375 - Marking and arrangement for switchgear

bus bars, main connection and control aux.

Wiring.

r) IS 5578 - Guide for marking of insulated conductors.

s) IS 3618 - Pre-treatment of MS sheets for phosphatising.

2.2 DESIGN AND PERFORMANCE REQUIREMENT

2.2.1 All the 440V AC, devices/equipment like bus support insulators, circuit breakers, PTs,

etc., mounted inside the switchgear shall be suitable for continuous operation and

satisfactory performance under the following supply conditions:

a. Variation in supply voltage : ± 10%

b. Variation in supply frequency : ± 5%

c. Combined voltage and frequency variation : ±10%

2.3 CONSTRUCTION:

2.3.1 The switchgear panel shall be designed, manufactured and tested in accordance with

relevant Indian Standards. The panels shall be indoor, metal enclosed, single/double

front, free standing type. All fuse switch, switch fuse and air circuit breaker feeders shall

be in fully compartmentalised fixed/draw out design as specified in the specific

requirement sheets. The sheet steel (CRCA) used for fabrication shall be of 1.6 mm for

non-load bearing members and 2.0 mm for load bearing members. The panels shall be

supplied with required base channels. The insulators shall be made of high epoxy resin

moulding. The bus bars and cable chambers shall be housed in separate chambers. The

bus bar and cable chambers should be fitted with bolted covers with gaskets and should

be shrouded to avoid direct access to live parts immediately after opening respective

covers. The bus bars and jumper connections shall be insulated to full maximum

operating voltage. The cubicle shall be designed for IP42 protection. The vermin

proofing shall be such that the vermin cannot enter from one compartment to another/bus

bar chambers. Neoprene gaskets shall be used for all doors, covers and openings.

2.3.2 The bus bars and connectors shall be made of high conductivity Aluminium. The bus

bars shall be amply sized to carry the rated continuous current under the specified

ambient temperature without exceeding the total temperature of 85°C. Unless otherwise

stated, the entire bus bar shall be rated for the continuous rated current of the incomer.

When sectionalised with a bus coupler, both the bus bars shall be of the same rating. The

entire switchboard along with all components shall be designed for the ambient site

condition. The minimum area of cross section of the neutral shall be half that of the phase

bus bar, unless other wise specified. Current Density shall be maximum 1 Amp. Per

Sqmm for single bus-bar, 0.8 Amp per Sqmm for double Bus-bars and less and agreed

figure to withstand 50 KA fault level for more than 2 bus-bars.

152

2.3.3 The bus bars and their connections shall be capable of withstanding, without damage, the

thermal and mechanical effects of through fault currents equivalent to the short time

rating of the switchgear. It shall be possible to extend the switchboard on both sides. The

bus bars shall be sleeved and with respected phase colour. The sleeves shall be rated for

an insulation level of 660V.

2.3.4 Each compartment shall have hinged doors with gaskets. Suitable door interlock with

switch / breaker shall be provided with provision for emergency defeat feature.

2.3.5 Suitable lifting hooks shall be provided. These hooks when removed shall not leave any

opening on the enclosure.

2.3.6 Switchgear shall be designed for a bottom / top cable entry and the bus bars shall be

located at top / bottom with respect to the cable entry, unless otherwise specified.

2.3.7 There shall be positive indication for various position of the trolley.

2.3.8 All switchgears compartments shall be totally enclosed with necessary barriers &

adjustable horizontal frame with rail arrangement. It shall be possible to change the

module size by repositioning compartment supports.

2.3.9 All switched drives other than rotary switches shall be lockable in “OFF” position.

2.4 SAFETY SHUTTER DEVICES:

2.4.1 Shutters shall be provided at bus bar chamber cut out for closing the same when the with

drawable chassis of the modules are drawn out.

2.4.2 The bus bar shutters shall be automatically operated by the movement of the carriage.

2.5 INSULATORS:

2.5.1 Insulators of moulded or resin bonded material shall have a durable, non-hygroscopic

surface finish having a high anti-tracking index. Insulators, barriers made out of hylam,

synthetic resin bonded paper, treated wood will not to be accepted.

2.5.2 Insulators shall be mounted on the switchgear structure such that there is no likelihood of

their being mechanically over-stressed, during normal tightening of the mounting and bus

bars, connections etc.

2.6 AIR CIRCUIT BREAKERS:

2.6.1 The circuit breaker shall be capable of making and breaking the specified fault currents

without straining or damaging any part of the switchgear. The breakers shall be air break,

153

motor/manual operated (as specified in specific requirement sheet), and horizontal draw

out type.

2.6.2 The circuit breaker shall be stored energy closing type, manual/electrically operated with

tripping mechanism. The circuit breaker shall be provided with 4 NO + 4 NC

(specifically for purchaser’s use) of auxiliary potential free contacts required for

indication, control, interlocking and other purposes. All contacts shall be wired to a

terminal block.

2.6.3 Circuit breakers with stored energy closing mechanism shall be capable of making the

rated short-circuit current, when the stored energy is suitably charged by a spring.

2.6.4 It shall also be capable of closing on no-load without suffering undue mechanical

deterioration. The maximum make- time shall also be not exceeded.

2.6.5 The direction of motion of the handle, for manual spring charging shall be marked. A

device indicating when the spring is charged fully shall also be provided.

2.6.6 Motors and their electrically operated auxiliary equipment for charging a spring shall

operate satisfactorily between 85% and 110% of the rated supply voltage.

2.6.7 The breaker operating mechanism should store energy for O-C-O operation and shall not,

in any case, get stuck in closed position during this cycle. After failure of power supply

to the motor, at least one open-close-open operation of the circuit breaker shall be

possible.

2.6.8 The breaker operating mechanism shall be electrically and mechanically trip-free in all

positions. The breaker should also be provided with both mechanical and electrical anti-

pumping devices.

2.6.9 The ACBs shall be provided with microprocessor based comprehensive releases for

protection against overload, short circuit and earth faults.

2.6.10 The circuit breakers shall be suitable for locking in fully isolated condition.

2.6.11 Following interlocks and features shall be provided so that

a. Truck can be moved within panel only when CB is off.

b. CB can be closed only when the test (or) service limit switches permit.

c. Breaker compartment door cannot be opened when the CB is in Service/test

position.

d. Breaker cannot be put in to service position with compartment door open.

e. Earth slide beyond the test position till trolley is drawn out.

154

2.6.12 Closing and tripping coil shall operate satisfactorily under the following conditions of

supply voltage variation:

• Closing coils – 85% to 110% of rated voltage.

• Trip coils – 70% to 110% of rated voltage.

2.7 MCCBs

2.7.1 The MCCBs shall confirm to the latest applicable standards.

2.7.2 MCCBs in AC circuits shall be of four pole construction arranged for simultaneous four

pole manual closing and opening. Operating mechanism shall be quick-make, quick-break

and trip free type. The ON & OFF positions of the MCCB shall be clearly visible to the

operator. Operating handle for operating MCCBs from door of board shall be provided.

2.7.3 MCCB terminals shall be shrouded and designed to receive cable lugs for cable sizes

relevant to circuit ratings.

2.7.4 The MCCBs shall be with adjustable overload and fixed short circuit with high breaking

capacity.

2.8 MCBs

Miniature circuit breakers for use on control circuits shall comply with the requirements

of applicable standards, unless otherwise mentioned

2.9 MOTOR STARTERS

2.9.1 Contactors:

• Motor starter contactor shall be of the electromagnetic type rated for

uninterrupted duty as defined in applicable standard.

• Main contacts of motor-starter contactor shall be of silver plated copper.

• Contactors shall be of the double break, non-gravity type.

2.9.2 Direct-on-line starters

• Direct-on-line starters shall be suitable for Class AC-3 utilisation category as

specified in applicable standards.

2.9.3 Thermal Overload Relays

• Starter shall be complete with a three element, positive acting, ambient

temperature compensated, time lagged thermal overload relay with adjustable

settings. The setting range shall be properly selected in accordance with the rating

of the motor.

2.10 SWITCHES, FUSE, CONTACTORS.

2.10.1 The switches shall be with silver plated contacts and capable of breaking safely full load

current of associated equipment. Switches shall be quick make and break type and

capable of breaking the circuit even if the mechanism spring fails. Barriers shall be

provided to prevent inter phase arcing. MCCBs and contactors for motor feeder shall be

adequately rated for motor duty (AC-3). Wherever called for, the same shall be sized for

155

capacitor switching. Fuses shall be provided with plungers and shall be visible without

removal of fuse from service. Fuse pullers shall be provided.

2.11 CURRENT TRANSFORMERS

2.11.1 The current transformers shall have synthetic cast resin insulation and be of the single

phase type, with number of cores as per the specific requirements.

2.11.2 The primary & secondary connections shall be clearly labelled.

2.11.3 All current transformers shall have insulation level and short time rating as per main

switchgear. All current transformers shall be dimensioned to carry continuously a current

of 120% of the rated current. The ratios shall be as per the specific requirements.

2.12 VOLTAGE/POTENTIAL TRANSFORMER (PT):

2.12.1 The voltage transformers shall be insulated for full voltage rating.

2.12.2 The PT shall have synthetic resin insulation and be of single phase type. Rated secondary

voltage shall be 110 V/√3 unless otherwise specified.

2.12.3 PT shall be capable of withstanding thermal and mechanical stresses resulting from short

circuit and momentary current rating of breaker/switches.

2.13 METERS, RELAYS AND OTHER ACCESSORIES:

2.13.1 All relays shall be of switchboard pattern, back connected, drawout type suitable for flush

mounting and fitted with dust tight cases and provided with flag indicators and hand reset

devices. The relays shall conform to IS 3231 or BS 3950 and BS 142. A set of test block

and test lead for necessary secondary injection tests shall be included. All relays in draw

out cases shall have suitable spring loaded contacts for inserting test block.

2.13.2 Relays shall be provided with hand reset type contacts. The flag indication shall be

suitable for external hand resetting and mechanically interlocked to prevent falling when

relays are subjected to vibration. The rating of the auxiliary contacts shall not be less than

10 amps at 240 V AC and 5 amps for 30V DC.

2.13.3 Each incomer / feeder shall be equipped with relays as detailed in the specific

requirements.

2.13.4 All relays shall have the following features:

a) Shall be suitable for auxiliary supply, as indicated in the specific requirement.

b) Shall be of drawout type suitable for flush mounting.

c) All auxiliary relays shall be of flush / semi-flush type.

d) All protective relays shall be provided with adequate number of self reset contacts

and hand reset flag indicators.

156

2.13.5 Indicating instruments shall be flush mounted digital type. Size of the instruments shall be

45 x 45 mm. All indicating meters shall be of taut band type. The element shall be shock

resistant and shielded from magnetic fields. The covers shall be of shadow proof design,

utilising all available light. All auxiliary equipment such as shunts, transducers etc that

are required shall be included in the scope of supply.

2.14 AMMETERS, VOLTMETERS, KW METERS, KWH METERS:

2.14.1 Ammeter, voltmeter and KW meter shall be of moving iron static type. Ammeters for

motor feeders shall be of extended scale type. The KW Meter and KWH meter shall be

suitable for measuring unbalanced loads on a 3 - phase, 4 wire systems. The KW Meter,

KWH meter and voltmeter shall operate on 415V 3φ, 4 wires supply.

2.15 POWER FACTOR METERS:

2.15.1 The range of P.F meters shall be 0.5 lag - 0.5 lead. These shall operate on 415V, supply.

2.16 INDICATING LAMPS / PUSH BUTTONS:

2.16.1 These shall be switchboard type, low power consumption LED type lamps complete with

necessary resistors. Lamps shall be provided with screwed translucent covers to diffuse

light. The lamp covers shall preferably be unbreakable, moulded, heat resistant material

and shall be provided with chromium plated bezels.

2.16.2 Push Buttons shall be heavy duty, push to actuate type with coloured button and

inscription marked with its function. Each push button shall have minimum 2 NO + 2 NC

contacts or as required, rated 10 A at operating voltage. Push button shall be shrouded

type except for emergency trip button (if provided), which shall be mushroom type for

easy identification. Push button colour shall be as follows

a) Stop/off - Red

b) Start/ON - Green

c) Reset - Yellow

d) Test - Black

2.17 CONTROL SWITCHES/SELECTOR SWITCHES:

2.17.1 Control and meter selection switches shall have integral name plate and for all other

devices, the same shall be located below the respective devices. Instrument and devices

mounted on the face of the panels shall also be identified on the rear with the same

number.

2.17.2 All control switches shall be rotary, back connected type having cam operation contact

mechanism. Phosphor bronze contacts shall be used on switches.

157

2.17.3 The handle of control switches used for circuit breaker operation shall turn clockwise for

closing and anti-clockwise for tripping and shall be spring return to neutral from close/trip

with lost motion device.

2.17.4 Control switch for DG and Incomer panels shall have one set of lost motion spare

contacts.

2.17.5 Ammeter selector switches shall be with off position and with make before break feature

and shall have 3 positions to read the three phase currents. Voltmeter selector switches

shall also be of 3 positions and off position, suitable to read phase to phase voltages.

2.17.6 The control switches, operating handles, meters, relays etc shall be mounted at the front

of the switchgear panels. The instruments shall not be mounted less than one metre or

more than two metres from the floor level. Ammeters and Voltmeters are to be provided

with selector switches. Operating handles shall not be mounted at a height more than

1.75 meters. Breaker Control switches wherever provided shall be so designed that when

released by the operator it shall automatically return to a neutral position. They shall be

fitted in sequence with lock to avoid inadvertent operation and shall be arranged such

that after passing the "closed" position the control switch cannot be moved into the

"Closed" position again without passing the "open " position. Each panel shall have

indicating lamps for "ON","OFF", "TRIP" "TRIP CIRCUIT HEALTHY" and “SPRING

CHARGED”.

2.18 AUXILIARY SUPPLY:

2.18.1 Auxiliary DC and AC supply shall be derived from the incoming source of the panel with

suitable control arrangements for indication circuits, closing circuits, space heaters etc.

2.18.2 Separate DC Insulated wire buses shall be provided. DC supply required for protection/

indication/ tripping shall be taken from the above wire bus bars through protective fuses.

2.18.3 Suitable fuses and links shall be provided for individual circuits for protection and also

for isolation from bus wire without disturbing the other circuits. Bus wires from panel to

panel shall be wired through necessary control terminals.

2.18.4 Panel heaters and thermostats shall be provided in all the panels.

2.19 CONTROL FUSES:

2.19.1 All control fuses shall be of HRC link type conforming to IS 2208. All fuses and links

shall be provided with suitable identification labels.

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2.20 CONTROL WIRING:

2.20.1 Stud type terminals with identification ferrules shall be used. Local dependent marking

as well as remote end dependent marking may be indicated in the ferruling at terminal

blocks. Interlocking type ferrules shall be used. All wires carried within the switchgear

enclosure shall be HRPVC insulated and neatly arranged so as to be readily accessible

and to be easily replaceable. Wherever necessary the wires should be run in cable troughs

and the wiring should be routed so that the same remains away from areas where

electrical flame or flash over may occur. No conduit or cables shall be carried through

the bus bar chamber.

2.20.2 The voltage transformer wiring shall be done by FRLS / HRPVC insulated, 1100V grade

multi stranded flexible copper conductor of size 1.5 sq.mm and all the current transformer

and DC control wiring shall be of the same type of cable as specified above with

conductor size of 2.5 sq.mm. The colour coding shall be as per IS 375.

2.20.3 AC and DC wiring are to be distinguishable function wise, AC and DC terminals are to

be separated by shrouded terminal separators and colour of AC and DC terminals shall be

distinct for easy identification.

2.20.4 All spare contacts of switches / relays shall be wired up to the terminal blocks.

2.20.5 20% extra spare terminals shall be provided. All terminals shall be suitable for

terminating 2 wires from bottom and top side of the terminal block. However not more

than one wire shall be terminated from either side on any terminal.

2.20.6 All CT wiring shall be terminated on shorting and disconnecting type terminals.

2.21 NAME PLATE:

2.21.1 Hard synthetic material / acrylic designation tags shall be embossed on all the

switchboards and individual compartments.

2.22 EARTHING:

2.22.1 An earth bus of requisite section not less than 40mmx10mm Alluminium strip, shall be

provided. It shall extend throughout and solidly connect all panels in a line with proper

terminals, at the end to connect to the station earthing system. The terminal arrangement

at the ends shall be suitable for connection by 50x6 mm GI flat and shall be complete in

the bimetallic washers etc.

2.23 CABLE CHAMBER:

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2.23.1 The position of the cable chamber shall be such that the cables can be safely taken and

carried through one meter trench at the bottom of the switchgear line up and the jointing

carried out in a convenient and satisfactory manner. The cable termination arrangement

for multiple cables shall permit connection and disconnection of individual cables without

disturbing the other cables. Each panel shall have a separate cable alley. Cable alleys

shall consist of cable supporting arrangement so that the load of the cable does not act on

the terminals. Special warning labels shall be provided on removable covers (or) doors

giving access to cable terminals and bus bars.

2.24 PAINTING

2.24.1 All metal surfaces shall be thoroughly cleaned and degreased to remove mill scale, rust,

grease and dirt. Fabricated structure shall be pickled and then rinsed to remove any trace

of acid. The under surface shall be prepared by applying a coat of phosphate paint and a

coat of yellow zinc chromate primer. The under surface shall be made free from all

imperfections before undertaking finishing coat.

2.24.2 After preparation of the under surface, the switchgear panel shall be spray painted with

two coats of final paint. Colour shade of final paint shall be RAL 7032 (epoxy based).

The finished panel shall be dried in staving oven in dust free atmosphere. Panel finish

shall be free from imperfections like pin holes, orange peels, run off paint etc.

2.24.3 All unpainted steel parts shall be cadmium plated or suitably treated to prevent rust

corrosion. If these parts are on moving element, then these shall be greased.

3.0 GENERAL:

Deviations from our specification (if any) shall be brought out separately clause wise and

explicitly. Deviations indicated in the guaranteed technical particulars (or) elsewhere

shall not be considered / accepted.

4. LIST OF DRAWINGS

4.1. The supplier shall furnish the following drawings for the switchgear.

4.1.2 Overall outline dimensions and general arrangement including plan, front elevation, rear

& side elevations, clearances recommended in front and back.

4.1.3 Switchgear layout plan including floor openings, fixing arrangements and loading details

4.1.4 Schematic control diagrams to cover controls, protection, interlocks, instruments, space

heaters, etc., for each type of module

a) Detailed internal wiring diagram of each type of module, including terminal

block numbers, ferrule numbers and the external cable connection designations.

160

b) Itemized bill of material for each module, listing all devices mounted and also

otherwise furnished like cable glands, indicating the Manufacturer’s type, rating,

quantity & special notes, if any.

4.1.5 Inter panel interconnection wiring diagram including terminal numbers and ferrule numbers.

4.1.6 Each type of protection relay and circuit breaker release characteristics.

(a) The supplier shall be entirely responsible for the correctness of the internal wiring

diagrams.

(b) The supplier shall ensure that the characteristics of the CT’s, fuses, protection

relays, PT’s and all other devices offered by him are such as to be suitable for the

purpose for which they are intended.

5 TEST CERTIFICATES

Type test certificates of all standard component parts, e.g. contactors, breakers, switches,

fuses, relays, CT’s, VT’s, and for the standard factory built assembly shall be submitted

by the supplier.

6 INSTRUCTION MANUALS

The supplier shall furnish specified number of copies of the instruction manual which would contain detailed instructions for all operational & maintenance requirement. The

manual shall be furnished at the time of dispatch of the equipment and shall include the

following aspects:

a) Outline dimension drawings showing relevant cross-sectional views, earthing

details and constructional features.

b) Rated voltages, current, duty-cycle and all other technical information, which may be necessary for correct operation of the switchgear.

c) Catalogue numbers of all components liable to be replaced during the life of the

switchgear.

d) Storage for prolonged duration.

e) Unpacking.

f) Handling at site.

g) Erection.

h) Pre commissioning tests.

i) Operating procedures

j) Maintenance procedures.

k) Precautions to be taken during operation and maintenance work.

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B) AUTOMATIC POWER FACTOR CORRECTION PANEL

1.0 Introduction

This specification is intended for design, manufacture, testing at manufacturer’s works,

delivering to site of APFC panel (switch able in steps) for the improvement of power

factor. The equipment to be offered under this specification shall be of proven design.

2.0 Codes and Standards

All the equipments covered under this specification shall be designed, manufactured and

tested in accordance with the latest relevant Indian standards and IEC codes. In the event

of any contradiction because of the stipulations made by the above standards, the

stringent of the two shall govern.

IS 13340 - capacitors for power system

IS 3231 - Electrical relays for power system Protection

IS 2705 - Current Transformers

IS 1248 - Direct acting electrical indicating instruments

IS 2147 - Degree of protection

IS 5578 - Marking & arrangement of switchgear, bus bars,

main connection and auxiliary wiring

3.0.0. Scope of work

The scope of design, manufacture, testing at manufacturer's works and supply of

equipment covered under this specification shall include but not necessarily be limited to

the following:

3.0.1. Design, engineering and fabrication of panels as per specification.

3.0.2. Supply and mounting of all the equipments specified. Capacitors are covered separately.

3.0.3. Internal wiring between all equipments up to the terminal blocks and inter panel wiring.

3.0.4. Preparation and furnishing of all data / drawings / documents in eight sets.

3.0.5. Testing of panels and the mounted equipments at works.

3.1 General

3.1.1 440V capacitor banks are intended for supplying compensating leading VARs at

substations, thereby improving the overall power factor of the plant. Capacitor units shall

be mounted inside the APFC panel, in separate cubicles.

3.1.2 APFC panels complete with necessary controls, protections and accessories as per the

specific requirements listed in this specification shall be supplied.

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3.2 Design & constructional requirements

3.2.1 The 440 V capacitor banks shall be in a self supporting, floor mounting type APFC panel

with degree of protection of enclosure IP42 as per relevant standard. Minimum thickness

of sheet steel shall be 2.5 mm. Control and protection elements for 440 V capacitor banks

shall be mounted on the capacitor bank panel itself.

3.2.2 All doors and openings shall be provided with neoprene gaskets. Doors shall have panel

locks and all hinges shall be concealed types.

3.2.3 A suitable removable undrilled gland plate (MS 3mm thick) shall be provided for cable

entry from bottom.

3.2.4 The Main earth bus shall be run at the bottom of panel. The size shall be of 50 x 6 mm GI

flat. Each capacitor unit body shall be connected to the main earth flat by means of 8

SWG GI. Wire. All metallic supports shall be earthed.

3.2.5 All instruments and power factor correction relay (PFCR) shall be neatly arranged on the

front side and shall be flush mounted. PFCR relay shall be microprocessor based type

programmable relay, which has following features.

i. Based on the current & Voltage input and the target power factor setting the relay

should process it self and switch on the required capacitors.

ii. The dead band range shall be such that it prevents hunting of capacitor.

iii. Digital setting of individual parameters including target power factor and step limit.

iv. Automatic self adjustment to any capacitor step value.

v. Digital indication of power factor, present parameters.

vi. No-volt release feature to immediately disconnect all capacitors in the event of power

failure.

vii. Plug-in terminal connection.

viii. Indication and elimination of defect capacitor steps.

ix. No. of steps shall be as per the BOQ.

x. The relay shall display visual alarms of the following conditions:

- Failure to achieve the target PF

- Harmonic over loading

- Step failure

3.2.6 The supplier shall design/select the required component confirming to IS/IEC standards to

make the system to complete.

3.2.7 The current carrying capacity of capacitor and its associated power circuit (switch, fuse,

contactors) shall be adequately designed to carry a maximum current of 1.8 times (due to

harmonic loading) the rated current of current of capacitor.

3.2.8 The Protection circuit shall be, by means of fuse, designed in such a way that it protects

the capacitor from thermal loading, while the current exceeds 1.8 times rated current, and

short circuit.

3.2.10 The APFC Panel shall be provided with proper ventilation. Successful bidder shall submit

the heat loss calculation.

3.2.11 The interconnection between the individual capacitors and the contactors shall be made

through flexible copper cables of adequate current carrying capacity.

3.2.12 The Main bus bar shall be made of suitable size aluminium conductor.

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3.3 Control Elements

3.3.1 All the control elements required for the satisfactory and safe operation of capacitor bank

like relays, contactors, protective relays, fuses, control switches, selector switches,

indicating instruments, timer & push buttons shall be housed in a well ventilated, free

standing, floor mounting type sheet steel panel.

3.3.2 The panel shall be provided with two nos. earthing terminals, un drilled cable gland plate,

space heater and cubicle illumination lamp.

3.3.3 Both manual and automatic control of power factor correction shall be provided.

Auto/manual selector switch for the above shall be provided on the capacitor control

panel.

3.3.4 The control supply should be tapped from main I/C supply.

3.3.5 Minimum 20% of spare contacts shall be provided in each contactor/relay. Spare shall be

separately marked and wired to the TB.

3.3.6 An out-off-balance current relay shall be provided to give visual/audible warning.

3.3.7 Fail-safe feature shall be incorporated to prevent leading power factor from every

occurring.

4.0 Tests and Inspection

All the acceptance tests as per relevant IS / IEC Standards shall be carried out in presence

of purchaser / his representative.

5.0 Packing and Despatch

All the equipments covered under this specification shall be properly packed and despatched to the

purchaser’s site to avoid damage during transit and storage at site.

164

C) TECHNICAL SPECIFICATION FOR 440V CAPACITOR

1.0 Scope

This specification is intended for design, manufacture, testing at manufacture’s works,

transporting to purchaser’s site of 440V capacitor banks, required for improvement of

power factor.

2.0 Codes and Standards

All the equipments covered under this specification shall be designed, manufactured and

tested in accordance with the latest relevant Indian Standards and IEC codes. In the event

of any contradiction because of the stipulations made by the above standards, the

stringent of the two shall govern.

IS 13340 : Mixed dielectric Capacitors for power systems

IS 7752 : Guide for improvement of power factor at consumer’s installations

3.0 Design and Construction Requirements

3.1 General

The 440V capacitor banks are intended for supplying leading VAR’s at substations,

thereby improving the overall power factor of the plant.

440V capacitor banks complete with necessary protections and accessories as per specific

requirements listed in this specification shall be supplied.

3.2 Capacitor Banks

3.2.1 The 440V capacitor banks shall be connected in Delta formation.

3.2.2 The 440V capacitor units shall be of APP type.

3.2.3 The 440V capacitor banks shall be mounted in a self supporting, floor mounting type

APFC panel. The control and protection elements for 440V capacitor banks shall be

mounted on the panel.

3.2.4 Two earthing terminals complete with bolts, nuts and washers suitable for connecting 8

SWG Cu. wire, which in turn to be connected to 50 x 6 mm tinned Cu. flat provided at the

bottom of APFC panel. Proper earth continuing shall be ensured for each capacitor unit,

all metallic supports etc.

3.2.5 The capacitor shall be designed to carry a maximum current of 1.8 times the rated current

of capacitor continuously, in accordance with IEC-871. The components shall be suitably

de-rated.

3.2.6 The capacitor units shall be hermetically sealed for complete for protection against leaks.

165

3.2.7 Suitable, protection circuit shall be designed, by means of fuse / MCCB, by the APFC

panel supplier to protect the capacitor from overloading, while the actual current exceeds

1.8 times rated current of capacitor, and short circuit.

3.2.8 The capacitor shall be suitably protected against over voltage. The units shall also be

protected against internal faults and the affected banks shall be isolated.

3.3 Discharge Resistor

3.3.1 The capacitor units shall be provided with internal discharge resistors built into the unit to

reduce the residual voltage to a safe value within the time specified in the relevant Indian

Standard after the capacitors have been disconnected from the supply.

3.3.2 Capacitor units shall also be protected against the internal faults and effected units shall

be automatically and immediately isolated in the event of such faults.

4.0 Tests and Inspection

4.0.1 All the acceptance tests as per IS 13340 shall be carried out in the presence of purchaser /

his representative.

4.0.2 Type test certificates of the identical Routine test reports shall be submitted for scrutiny.

166

D) SPECIFICTIONS FOR STANDARD AUTOMATIC MAINS

FAILURE PANEL

Floor mounting, cubicle type, Automatic Mains Failure Panel, comprising of

TP Contactor with HRC Fuses for MAINS

TP Contactor with HRC Fuses & Thermal Overload ] Up to 380 KVA

Relay for ALTERNATOR

TP Motorized Air Circuit Breaker for MAINS

TP Motorized Air Circuit Breaker for ALTERNATOR ] Above 380 KVA

Neutral Contactors for MAINS & ALTERNATOR

Voltmeters with Selector Switches f or MAINS & ALTERNATORS

Ammeter with Selector Switch

Current Transformers

Frequency Meter

KWH Meter, KW Meter, PF Meter

-- Battery Charger consisting of:

Transformer / Rectifier with surge protection ]

Network ] against deletion of

DC Voltmeter ] Battery

DC Ammeter ] Charging

Selector Switch for Trickle, Off & Boost ] Alternator in Engine

Selector Switch for Current Adjust ]

-- Mains Supply failure monitor (Voltage Sensing )

-- Supply Failure Timer

-- Restoration Timer

-- Control Unit incorporating 3 impulse Automatic Engine Start / Stop and

“Failure to Start” lockout.

-- Impulse Counter with locking and reset facility

-- OFF / Manual / Auto / Test Selector Switch

-- Control Circuit ON / OFF Switch

LAMP INDICATION & TRIP ANNUNCIATION SCHEME:

Condition Indication Trip

167

Annunciation

Mains ON Yes ---

Generator On Yes ---

Load on MAINS Yes ---

Load on GENERATOR Yes --- Low Lube Oil Pressure Yes Yes

High Water Temperature Yes Yes

Overspeed ( 625 KVA and above ) Yes Yes

Set Fails to Start (with Alarm) Yes ---

Push Buttons / Switches for :

-- Engine Start / Stop

-- Alternator Contactor ON / OFF

-- Mains Contactor OFF

-- AMF Test

WORKING OF THE PANEL:

a. Auto Mode:

When the Mains supply fails, the “Mains Supply Failure Monitor” operates

after a preset time of approx. 10 secs. This actuates the “3 impulse Engine

Start” control.

We do not recommend plug type relays. The Control Unit gives three

starting impulses with an interval of 1-5 secs. If the Engine starts at the first impulse, the unit shuts off. If not, it gives further two impulses, during

which time, if the engine does not start, the unit shuts off, activating the

audio-visual alarm for “Set

fails to Start”.

On starting of the engine, the alternator switchgear closes automatically

after the preset time of 1-10 secs.

When the Mains Supply is restored, the “Restoration Timer” operates, and

after the preset time of 10 secs., the load is automatically transferred to the

Mains, and the Generator shuts down.

b. Test Mode:

By operating the “AMF Test” Push Button, the conditions of Mains

Failure are stimulated as explained in Auto Model above without disturbing

the supply through Mains Switchgear.

c. Manual Mode:

The DG Set operates as a standard manual operated set, and all its

functions are carried out manually by means of “ Engine Start / Stop” and

“Alternator Contractor ON / OFF” Push Buttons.

168

E) SPECIFICTIONS FOR DISTRIBUTION BOARDS

Distribution boards offered shall be suitable for operation on 440 V AC and metal clad type

with lockable hinged door, suitable for flush or surface installation as required in the

positions.

All Distribution boards shall be with isolator/MCB and earth leakage circuit breaker as

specified. Distribution boards shall contain bolted type miniature circuit breakers mounted on

bus bars. Miniature circuit breakers shall be quick-make, quick-break type with trip-free

mechanism; closed or tripped position. A fault on one phase of a 3-phase circuit shall trip all

phases.

Miniature circuit breaker shall be SP, DP, TP or TPN and of the current rating all as specified

elsewhere or on the drawings; all MCBs shall have minimum interrupting capacity of 10 kA;

MCB shall conform to BS.

Neutral busbars shall be provided with the same number of terminals as there are single ways

on the boards, in addition to the terminals for the incoming mains. An earth bar of size similar

to the neutral bar shall also be provided.

Phase barriers shall be fitted and all live parts shall be screened from the front.

Ample clearance shall be provided between all live metal and the earthed case and adequate

space for all incoming and outgoing cables.

All Distribution boards external to the building shall be enclosed in a weatherproof mild steel

construction feeder pillar complete with hinged and lockable steel doors. An allowance of

25% spare ways shall be made on all distribution boards.

All circuit identification card, within clear plastic case with metal frame, shall be provided

within each Distribution boards.

169

S- 4

SPECIFICATIONS OF EARTHING INSTALLATION

1. GENERAL:

This Section relates to supply installation, testing and commissioning of the

“Earthing System” strictly in accordance with IS-3043 (Latest Edition) and generally as

specified below:

2. SYSTEM:

There shall an “EARHING GRID”. The main Earth conductor shall be laid in

Trenches / On wall / on structures as the case may be and shall be earthed through Earth

Electrodes around the Factory Building / Plant Building.

3. INSTALLATION PARTICULARS:

3.1. All Electrical Equipments shall be properly earthed. Non-current carrying

Metal Parts of the equipments shall be earthed.

3.2. Medium Voltage and 3 phase L.T. systems & equipments shall have two

Distinct earths. Single-phase equipments shall have one earth.

3.3. Continuous earthing shall be provided by means of suitable size Bare G.I. /

Copper / PVC insulated copper strips or suitable bare GI/copper wires.

3.4. Earth electrodes shall be as specified either 600 x 600 x 6 mm GI plate or

Copper Plate of same size but 3.15 mm thick. 40 mm dia GI pipe 2.5 Mtrs.

(minimum) long is also specified as Earth Electrodes. 25 mm dia class ‘B’ GI pipe

with funnel with wire-mesh shall be provided for watering purpose. Test Link shall be

provided. Funnel and test Link shall be housed in Masonry Inspection Chamber with

C.I. 300 x 300 mm hinged cover shall be ground level. The Earth Pit shall cover

alternate layers of salt and charcoal.

OR

Earthing using Maintenance free Earth stations including supply of earth electrode,

special compound, around 3 Mtrs deep approximate 6'' dia bore in any soil including

rock, putting earth electrode, special compound, black cotton soil if required, providing

suitable test link, suitable inspection chamber, suitable size round C.I. cover say 12"

did. or nearest standard size , necessary Brickwork with plastering and finishing.

3.5. Earth Strips laid outdoor shall be buried in ground at 600 mm depth.

3.6. Earthing leads shall be securely connected to equipments / structures etc.

If earthing leads are wires these shall be necessarily connected, by means of

socket fixed by crimping method.

3.7. Earth Resistance at Earth Electrode shall be less than one Ohm all times.

3.8. If Multiple Earthing Stations are to be provided, the Earthing Stations shall be separated

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by minimum distance of 5 Mtrs. centre to centre.

3.9. All joints shall overlap by minimum 50 mm GI Earth Strip joints shall be

Properly welded and coated with 2 coats of black bitumen paint.

3.10. Size of GI Earth-strip for earthing shall be generally under:

a) HT Switch-yard/Earthing station: 50 x 6 mm GI strip

b) Switch-boards up to 800 Amps: 40 x 6 mm GI strip

c) Other switch-boards and motors including

50HP and above. 32 x 6 mm GI strip

d) Motors less than 50HP up to and including

20HP 32 x 3 mm GI strip

e) Motors less than 20HP 25 x 3 mm GI strip

f) P.S.D.B.’s L.S.D.B’s 10 SWG GI Wire

g) Transformer Neutral Copper strip Size as

per transformer rating

h) Metering C.T’s / P.T’s, L.A’s & TVM Box

(double earthing) 25 mm x 5 mm copper

i) Lighting Conductor System 32 x 6 mm GI strip

4. EARTHING STATIONS:

(General Requirements subject to variation depending on other considerations from project

to project.)

Earthing General Requirements given in earthing schedule.

***

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S- 5

SPECIFICATIONS OF HT & LT CABLES

HT POWER CABLES

Scope

The specification covers the Design, manufacture, shop and laboratory testing, despatch, supply, laying and

commissioning of 3 core 11 / 22 / 33 kV armoured Aluminium XLPE cables.

Standards

The design, manufacture and performance of the three core HT cables covered under the specification shall

comply with BS and other specific requirements stipulated in the specification. Unless otherwise specified

the cable, cable jointing kits/ terminations and process shall conform to the latest applicable British

Standards.

General Construction

Salient Electrical and Mechanical characteristic of U.G. cables to be supplied.

Cables for high voltage applications shall be of heavy duty, comprising of compact circular stranded (rm/v)

aluminium conductor, provided with conductor screening of semi-conducting compound, dry cross linked

polyethylene insulated (XLPE) with nominal thickness of 6.0 mm., provided with insulation screening over

individual cores, consisting of extruded semi-conducting compound and copper tape as metallic screening,

cores lipid together with suitable fillers in the interacts, covered with extruded PVC inner sheath,

galvanised single flat steel strip armoured and overall PVC outer sheathed cable suitable 11 / 22 / 33 KV

(E) earthed.

The XLPE insulation provided shall be of dry curing process i.e CCV process and necessary documentary

evidence for the same shall be submitted. Cables manufactured under any other process will not be

acceptable. Further the conductor screen, XPLE insulation and insulation screen shall be extruded in one

operation.

Cross Linked Polyethylene Cables

The salient features of the cables that are to be supplied/installed are cross linked polyethylene insulated

XLPE 3 core aluminium conductor, screened extruded semi conducting XLPE compound and copper tape,

with extruded PVC inner sheath, galvanised steel strip[ armoured, and overall PVC outer sheathed suitable

for laying directly in ground or in cement concrete ducts/stoneware pipe.

Design of Cables

The cables shall be suitable for laying in ground and trenches.

The cable shall be suitable for use, where combination of ambient temperature and temperature rise due to

load results in conductor temperature not exceeding 90’ C under normal operation, and 250’C under short

circuit condition.

The voltage stress shall be uniform over the conductor and the insulation. The limit of the voltage stress

shall be such that the life of the cable is more than 25 yrs. This shall be supported by calculations/test

report/accelerated ageing test.

The short circuit current due to single line to ground fault of the specified duration shall be passed through a

combination of non-magnetic metallic screen and armoured provided in the cable.

172

Technical Particulars of HT Cables.

S.No.

Particulars of HT Cables

Three Core Cables

i) Type of Cable Three core armoured, non magnetic cable

ii) Voltage Grade As Specified in BOQ

iii) System Earthing Solidly Conductor

iv) Conductor Stranded Conductor

v) Conductor screening Semi Conducting compound by extrusion

vi) Insulation Properties As per BS

and process of application

vii) Nominal thickness of As per BS

insulation

viii) Insulation screening

-Non metallic part Semi-conducting compound over the

insulation

- Metallic part Copper tape(s)

x) Inner Sheath Extruded inner sheath applied on laid up

cores and its thickness as per BS

xi) Core Identification Coloured strips applied on cores or different

colouring of XLPE insulation or By numerals

(1,2,3) either by applying numbered strips or

by printing on the cores.

xii) Armouring As per BS

xiii) Outer sheath Thickness As per BS

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LT POWER CABLES

a. SCOPE:

This Section relates to supply, installation, testing and commissioning of medium voltage

cables.

b. SYSTEM:

A) All cables are required to be laid either in excavated trench or on M.S. Structures or on the

wall or in RCC trench.

B) Cables shall be laid in one piece length and no straight through joint shall be

allowed.

c. TECHNICAL PARTICULARS OF LT CABLES

S.No.

Particulars of LT Cables

2/3/4 core LT Cables

i) Size of Cable As per Single Line Diagram

ii) Voltage Rating 650/ V/1100 V

iii) Conductor Material Plain Aluminium

iv) Insulation

-Type Type A PVC Compound

-Tolerance 0.1 mm + 0.1 nominal thickness of insulation

v) Identification of Core Single core cable: Red, Black, Yellow, Blue

or Neutral (non pigmented)

Two Cores cable: Red & Black

Three Core cable: Red, Yellow & Blue

Four Core Cable: Red, Yellow, Blue, Black

Reduced Neutral: Black

vi) Laying of cores in case Right hand lay for outer most layer

of multi core CABLES successive layers in opposite layers.

vii) Inner sheath thickness As per BS

viii) Armoured Magnetic type

ix) Outer sheath

-Type ST PVC compound BS

- Process of application Extrusion

- Thickness As per BS

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d. INSTALLATION:

1. The minimum width of trench for laying single cable shall be 350 mm.

2. Where more than one cable is to be laid in the same trench in horizontal formation, the

width of trench shall be increased such that the inter-axial spacing between the cables,

except were otherwise specified shall be at least 200 mm.

There shall be a clearance of at least 150 mm between axis of the end cables and the

sides of the trench.

Where gradients and changes in depth are unavoidable, these shall be gradual.

The bottom of the trench shall be level and free from stone, brick bats etc. The trench

shall then be provided with a layer of clean, dry sand cushion of not less than 75mm. The LT

cable shall be laid at a depth of not less than 750 mm. HT cables shall be laid at a depth of

1000mmm.

The cable shall be pulled lover rollers in the trench steadily and uniformly without

jerks and strains. The entire cable length shall as far as possible be laid in one stretch.

However, where this is not possible the remainder of the cable may be removed by ‘Flaking’.

3 Cable Laying and Handling

Cables shall be laid in full standard lengths unless the route length exceeds the standard

length of a drum. It should be ensured that both ends of the cable are properly sealed to

prevent absorption of moisture during transportation, storage, etc. Sufficient number of sealing

caps shall be available at site to ensure sealing of cable ends in case in of part use of drum.

When cable drums have to be moved over short distances, they should be rolled in the

direction of the arrow, marked on the drum.

While removing cables the drums shall be properly mounted on jacks or a cable wheel.

4 Bending Radius

The minimum safe bending radius for all types of PVC and XLPE cables shall be

taken as 12 times and 15 time the overall diameter of the cables respectively.

Wherever practicable, larger radius should be adopted. At joints and termination, the

bending radius of individual cores of a multi core cable shall not be less than 15 times its

overall diameter.

5 Separation

Cables of different voltages and also power and control cables should be kept in

different trenches of racks with adequate separation. Where available space is

restricted, LV/MV cable shall be laid above HV cables.

Where cables cross one another, the cable of higher voltage shall be laid at a lower

level than the cable of lower voltage.

Power and communication cables shall as far as possible co\ross at right angles. Where power cables are laid in proximity to communication cables the horizontal and vertical

clearances shall not normally be less than 300 mm.

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6 Laying

Cables shall be laid direct in ground, masonry trench, pipes/closed ducts, open ducts or

on racks as per requirement.

For short runs and sizes up to 25 sq. mm of cables up to 1.1 kV grade, any other suitable

method of direct handling and laying can be adopted

When the cable has been properly straightened, the cores are tested for continuity and

insulation resistance and the cable is then measured. In case of PVC cables, suitable moisture

seal tape shall be used for this purpose.

7. Sand Cushion

When the cable has been properly straightened the trench shall be covered with 75 mm

thick layer of good quality clean river sand cushion then the cables shall be lifted and placed over

the sand cushion.

Again, another layer of good quality clean river sand 75 mm thick should be laid and

gently pulled on to the top of the cable to form a depth of 75mm from the top of the cable.

The minimum envelop cushion around the cable shall not be less than 150 mm. The

pulling shall be done by hand and in such a manner as to provide good bedding for the

protective cable covers like tiles or bricks.

In the case of vertical multi-tier formation after the first cable has been laid, a sand cushion of 300 mm shall be provided over the initial bed before second tier is laid. If

additional tiers are formed, each of the subsequent tiers also shall have a sand cushion of 300

mm as stated above. The top most cable shall have final sand covering not less 75 mm before the

protective cover is laid.

8 Brick Protection

Unless otherwise specified, LT the cables shall be protected by second class bricks

of not less than 200x100 x100 mm (nominal size) as per building specification or

protection covers placed on top of the sand,(bricks to be laid breadth wise) for the full length

of the cable. Where more than one cable is to be laid in the same trench, this protective covering

shall cover all the cables and project at least 50 mm over the sides of end cables.

The trenches shall be than backfilled with excavated earth free from stone or other

debris and shall be rammed watered in necessary, in successive layers not exceeding 300

mm, unless otherwise specified a crown of earth shall be formed to allow for subsidence.

Were road berm, or lawns are cut or curb stone displaced, these shall be made good,

and all excess earth removed from site.

9 Pipe Ducts

For road, entry into buildings and paved areas cables shall be either drawn in ducts or

in pipes of CI, GI, or reinforced cement concrete. Pipe shall be of at least 100mm dia for a

single cable, and 150 mm diameter for more than one cable depending on the diameter. Top

of pipe shall be not less than 750/1000 mm for LT/HT cables from the top surface unless

otherwise required. All pipes shall be provided with a fish wire.

Pipe ducts not used shall be plugged on both sides with lean cement mortar. Where

cables have been drawn the ends shall be plugged with bituminized hession tape over the

176

cables for water proofing.

For longer distances and at bends draw-pits of adequate size shall be provided to

facilitate drawing in of cable. The draw pit shall be provided width cement concrete

reinforced cover of approved design. Inside buildings, rooms and sub- stations masonry ducts where CC covers or chequer plates are provided, cables shall be laid on racks and cables trays,

with clamps.

10 Cable drums shall be checked for any damage in transit.

11. Insulation test of the cable shall be carried out between phases and phase to earth

before unwinding the drum.

12 Laying of cables shall be carried out by skilled and experienced labourers using

adequate rollers to minimize stretching of the cable/external damage to cables.

13 Approved GI cable markers shall be provided along the route of the cable at every

30 meters distance. (For underground cables).

14 Cables in built-up trench shall be laid on MS clamps/supports to be fixed on side walls or

top slab of the trench.

15 Distance between two adjacent cables shall be kept equal to cable diameter and cables

shall be clamped properly to keep the cables in positions.

16 Distinguishing markers shall be provided on both cable ends for identification. Cable

tags shall be provided at both ends cables indicating size of the cable and From / To

information. For lengthy cables cable tags shall be provided at every 30 Meters and at road

crossings.

E CABLE TRAYS

FRP (Fibre glass Reinforced Plastic) cable trays shall be manufactured frim fibre glass

moulded or formed by any accepted technique with an mixture of resin. The glass content in

the finished product shall be about 50%-60%.

Material shall be both acid resistant as well as corrosion resistant to saline

atmosphere. The trays shall be fire resistant and also conform to relevant BS. Trays

are for outdoor use and shall be resistant to u.v. radiation.

Cable trays shall be perforated type trays.

Trays shall be fabricated in standard length of 3.0m. Jointing of cable trays shall be with

fish pates to match the dimension of the cable tray. Fixing both for the jointing go the tray and

fixing of the trays on the structure shall be with stainless steel or approved type of corrosion

resistant fixtures.

Where necessary, ready made bends, tees, reducers shall be provided to match the run

of cables.

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S - 6

SPECIFICATIONS FOR POINT WIRING .

1 Type of Wiring

Wiring is to be done in looping system of wiring without any jointing. Phase wires

shall be looped in switch control points & neutral; shall be looped at out-let points.

2 Points Wiring

Point wiring shall include all works necessary to complete wiring of a switch circuit of any length from the Light Fan Bell point to the following via the switch.

a) Ceiling rose and connector (in the case of ceiling exhaust fan points)

b) Back plate (in case of fluorescent fitting with down rods, etc.)

c) Socket outlet (in the case of socket outlet points.)

d) Lamp holder (in case of wall brackets, bulk head and similar fittings).

The following shall be needed to be included in the point wiring.

a) Switch Modular Version, Plate, and Surface / Concealed Box etc.

b) Ceiling rose or connector as required.

c) Any special or suitable round block for neatly housing the connector and

covering the fan hook in case of fan point.

d) Wires for phase, Neutral, Earth from switch board to light point.

e) Wooden box, bushed conduit, porcelain tubing where cables passes

through wall.

f) Earth wire from three pin socket outlet point / fan regulator to common

earth

g) PVC Conduit / Casing Capping from Switch board to Point.

h) All fixing accessories such as clips, rails, screws, phil plugs, wooden

pluge, etc. as required.

i) Connections to ceiling rose, connector socket outlet, lamp holder, switch

and fan regulator etc.

j) Wires lopping the same switch board and inter connections between

points on the same circuit.

k) Providing fish wire in conduits while recessed conducting work is

undertaken.

Where one/two/three lighting fixture are controlled from one switch, wiring will be from

switch to fixture.

Each lighting circuit shall not have more than ten outlets or 800 watts whichever is lower

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and 3 KW for power circuit. Each Conduit shall not hold more than three branch circuits.

Flexible wires for connection to appliances, fans and pendants shall be 650/1100 V grade,

(three cores i.e. (P. N. E. ) insulated, & sheathed with strengthening wire.

Every conductor shall be provided with identification ferrules at both ends matching the

drawings.

2. Concealed PVC conduits in wall

Conduits concealed in the wall should be installed in the rectangular fashion, i.e.

horizontal or vertical placement from the switch board, drop point, etc. In no case it

should be installed diagonally. The chasing of wall should be done by a machine which

makes an exact slot in the wall to accommodate the conduit. The conduit should be

properly secured in the slot by necessary hardware. Reinstatement should be done with

plastering to the original surface of the wall. The conduit entry in a switch box must be

through a bush adaptor.

3. SURFACE PVC CASING-N-CAPPING WIRING

All casing-n-capping shall be rigid PVC. All casing-n-capping accessories shall be

PVC grip type.

The under surface of the casing-n-capping including all bends, unions, tees, junction

boxes etc. forming part of the casing-n-capping system shall be adequately supported.

The casing-n-capping shall be individually fixed using galvanized screws at every 600 mm.

Junction box for lighting fixtures, fans etc. shall be surface mounted. The box shall be

completed with covers to be fixed with screws.

The casing-n-capping of each circuit or section shall be competed along with

conductor are drawn in. Separate earth wire of appropriate size shall run in each casing-

n-capping for earthing. If casing-n-capping are liable to mechanical they shall be adequately

protected.

4 SURFACE PVC CONDUIT WRING

All conduits shall be rigid PVC conduits. All conduits accessories shall be PVC grip

type. No PVC conduit less than 20 mm. dia shall be used.

Conduit pipe shall be jointed by means of couplers and accessories only. In long distance

straight runs of conduit, inspection type couplers at adequately supported.

The under surface of the conduit pipes including all bends, unions, tees, junction boxes

etc. forming part of the conduit system shall be adequately supported.

Conduit pipes shall be fixed by heavy gauge galvanized PVC saddles and spacers.

The conduit pipes shall be individually fixed using galvanized screws at supported.

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All necessary bends in the system including diversion shall be done by bending pipes or

by inserting normal or inspection type normal bends or by fixing inspection boxes whichever is

more suitable. Conduit fittings shall not be used on conduit system exposed to weather.

Readies of such bends in conduit pipes shall not be less than 7.5cm. No length of conduit shall have more than the equivalent of two quarter bends from outlet. Additional bends shall be

inspection bends/boxes.

The junction boxes for lighting fixture, fans etc. shall be surface mounting. The boxes

shall be complete with covers to be fixed with screws.

The conduit of each circuit or section shall be completed before conductors are drawn

in. The entire system of conduit after erection shall be tested for mechanical and electrical

continuity throughout and permanently connected to earth. Separate earth wire of appropriate

size shall run in each conduit for earthing. It conduit pipes are liable to mechanical

damage they shall be adequately protected.

5. WIRES.

The system of wiring shall done with of single core FRLS PVC insulated Multi stranded

copper conductor wire in PVC conduits concealed / exposed PVC conduits or Casing

capping / above false ceiling.

6. General.

Prior to laying and fixing of conduits / casing capping the contractor shall carefully

examine the drawings indicating the layout of conduits / casing capping , satisfy himself

about the sufficiency of the number and size of conduit, location of junction boxes , sizes

and location of switch boxes and other relevant details. The consultant / Architects shall

approve the layout any modification suggested by the consultant / Architects should be

carried by the contractor. Any discrepancy found in the drawing shall be brought to the

notice of the consultant.

6.0 Material.

6.1 PVC Conduit: PVC shall be of minimum wall thickness of 2 mm for conduit up to 25

mm diameter and 2.7 mm for conduit above 25 mm diameter.

6.2 The tubing must be perfectly circular, without any burrs or kinks.

All junction boxes shall be of high dome type and 2 mm thick.

6.3 The conduit shall be delivered to site of construction in original bundles and each length

of conduit shall bear the label mark of manufacture.

6.4 The contractor shall submit to the consultant detail layout plan of conduit network containing particulars regarding size and routs of conduits, no. of wires carrying in each

conduits, inspection and junction boxes provided.

The size of conduit shall be selected in accordance with the number of wires permitted

under table given below. The minimum size of the conduit shall be of 25 mm dia unless

otherwise indicated or approved. Size of wires shall be not less than 1.5 sq. mm copper.

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S - Runs of conduits which have distance not exceeding 4.25 m between draw boxes

and which do not deflect from the straight by an angle more than 15 degree.

B - Runs of conduits, which deflect, from the straight by more than 15 degree.

7. CONNECTIONS.

All conduit joints shall be fully weather tight. Junction boxes and running joints shall be

provided at suitable places to allow for subsequent extension if any. As far as possible

diagonal run of conduit and adaptable boxes, back outlet boxes, switch boxes and the

like must be provided with entry spout and smooth PVC bushes.

Conduit system shall be erect and straight as far as possible. To avoid traps where water

may accumulate from condensation, unless unavoidable, suitable provision for draining

the water shall be made. Separate conduit shall be run for 15-amp power out let wiring.

8 BEND IN CONDUIT

Where necessary, bend or diversion may be required then the circular inspection boxes

with adequate and suitable inlet and outlet shall be provided. In case of recessed system,

each junction box shall be provided with a cover properly secured and flush with the finished wall/ ceiling surface, so that the conductors inside the conduit are accessible. No

bend shall have radius less than 2.5 times the outside the diameter of the conduit.

9 FIXING OF CONDUIT.

Conduit and junction boxes shall be kept in position while the wall / floor are under

construction for which proper holdfasts shall be provided. Conduits shall be arranged so as to facilitate easy drawing of wires through them. Adequate junction boxes of

approved make and size shall be provided. Where conduits cross expansion joint in the

buildings adequate expansion fitting or other approved devices shall be used. All

conduits shall be installed so as to avoid steam and hot water pipes. Conduit stubs in

floor slabs shall be kept as short as possible above the finished floor level in order to

avoid any damage to them. After the conduit, junction boxes, outlet boxes and switch

boxes are installed in position their outlets shall be properly plugged or covered so that

water, mortar, insects or any other foreign matter does not enter into the conduit system.

Where called for, surface conduits shall be fixed by means of spacer bar saddle at

intervals not more than 500 mm form both sides of fittings or accessories. The saddles

shall be of 3 mm x 19 mm galvanized mild steel flat, properly treated, primed and

painted, securely fixed to support by means of nuts and bolts / rawl plugs and GI machine screw.

Nominal Cross sec

area (mm)

20 mm 25 mm 32 mm

S B S B S B

1.50 5 3 8 6 14 10

2.50 4 2 6 4 12 8

4.00 3 2 5 3 8 6

6.00 2 - 3 2 8 6

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10 SWITCH OUTLET AND JUNCTION BOXES

All outlets for switch and other receptacles shall be equipped with rust proof outlet boxes

of MS / polycarbonate as called for, having external and internal surface true to finish.

Where called for outlet boxes for receiving switches and fan regulators shall be of same

make of switch and sockets with white polycarbonate modular cover plate

11 TELEPHONES AND NET SYSTEM.

Conduits, junction boxes, draw boxes, outlet boxes and cover for telephone and net

system shall be separate. Conduits for telephone and net system shall be at least 300 mm

away from the electrical conduits. The conduits for telephone and net wiring shall be of

specified size and shall terminate at outlets as indicated on drawing. Telephone and net

system conduit shall have G.I. pull wires installed.

12 BUNCHING OF WIRE

Wire carrying current shall be so bunched in the conduit that the outgoing and return

cables are drawn into the same conduit. Cables originating from two different phases

shall not run in same conduit.

13 DRAWING OF CONDUCTOR.

The drawing and jointing of copper conductor wires and cables shall be executed with

due regard to the following precautions. While drawing insulated wires into the conduit

care shall be taken to avoid scratches and kinks, which cause breakage of conductor.

There shall be no sharp bends. Insulation shall be stripped off like sharpening of a pencil

and it shall not be removed by cutting it square of wiring. Strands of wires shall not be

cut for connecting at terminal. The terminals shall have sufficient cross sectional area to take all strands and shall have flat ends. The pressure applied to tighten terminal screws

shall be just adequate neither too much nor too less. Conductor having nominal cross

sectional area of 10 sq mm and above shall always be provided with cable sockets. At all

bolted terminals, brass flat washer of large area and approved steel spring washers shall

be used. Brass nuts and bolts shall be used for all connections.

Only certified wiremen and cable jointer shall be employed to do jointing work. All

wires and cables shall bear the manufacturer’s label and shall be brought to site in new

and original packages.

For all internal wiring PVC, insulated wires of 650 / 1100 volt grade shall be used. The

sub-circuit wiring for point shall be carried out in looping in system and no joint shall be

allowed in the length of conductor. No wire shall be drawn into any conduit until all

work of any nature that may cause injury to wire is completed. Care shall be taken in

pulling the wires so that no damage occurs to the insulation of the wire. Before the wires

are drawn into the conduit, the conduit shall be thoroughly cleaned of moisture, dust,

dirt, or any other obstruction by forcing compressed air through the conduits. The

minimum size of PVC insulated copper conductor wire for all sub- circuit, light and fan

point shall be 1.5 sq mm. In case of power circuit not more than two nos 15 amp power

outlet shall be carried out with 4 sq mm PVC insulated copper conductor wire. All power circuit shall be provided earth wire.

14. JOINTS.

All joints shall be made at main switches, distribution boards, socket outlets, lighting

outlets, and switch box only. No joint shall be made in conduits and junction boxes.

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Conductors shall be continuous from outlet to outlet. Joint where unavoidable shall be

made to conform to approved standards.

15 MAINS AND SUB-MAINS

Mains and sub-mains cable where called for, shall be of the rated capacity and approved

make. Every sub main shall be drawn into an independent adequately sized conduit.

Adequate size of draw boxes shall be provided at convenient location to facilitate easy

drawing of the sub-main and mains cables. An independent earth wire of proper rating

shall be provided for every single sub-main. Where mains and sub-mains cables are

connected to the switchgear, sufficient extra length of mains and sub-mains cable shall

be provided to facilitate easy connection and maintenance.

16 LOAD BALANCING.

Balancing of circuit in three-phase installation shall be planned before the

commencement of wiring and shall be strictly adhered to.

17 COLOR CODE OF CONDUCTORS

All wires shall be colour coded as follows:

Phase Color of wire

R---------- Red ---Phases

Y--------- Yellow ---Phases

B-------- Blue --- Phases

N------- ---- Black --- Neutral

Green ---Earth

18 SWITCHES

All 6 Amp switches shall be enclosed type flush mounted switches of 250-volt grade. All

switches shall be fixed inside the switch box on approved white polycarbonate modular

cover plate, secured to the box with countersunk brass screws. leveling ample space at

the back and side for accommodating wires. The switch board controlling the light or fan

shall be located at 1200 mm above finished floor level, unless otherwise indicated.

19 FLUSH PLATES.

All switch receptacles and telephone outlet in walls shall be provided with approved

white polycarbonate modular cover plate, secured to the box with countersunk brass

screws.

20 WALL SOCKET OUTLETS

All 6 Amp wall sockets outlets where called for on the drawing shall be switched and 3

pin type. All 16 amp sockets outlets where called for shall be switched and 3 pin type.

The sockets shall be erected at 150 mm above finished floor level, unless otherwise

indicated.

The switch controlling the point outlet and sockets outlet shall be on the phase wire of

the circuit. The earth terminal of the socket shall be connected to the earth terminal

provided inside the box by means of green pvc insulated copper earth wire.

21 FITTING AND ACCESSORIES

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Lighting fixture

The lighting fixtures shall be as specified in bill of quantities and drawings. The

mounting height and location shall be as specified in the drawings. The lighting fixtures shall be either supported vertically of mounted on bracket or suspended by a hook, as required.

22 TELEPHONE/INTERCOM DISTRIBUTION SYSTEM

SCOPE

The scope of work shall cover supply, installation, testing and commissioning of

telephone/intercom distribution system.

DISTRIBUTION SYSTEM

Telephone cables shall be used of 0.5mm.dia electrolytic tinned copper conductors duly

colour coded twisted pairs with rip cord.

Cabling shall be multipair, PVC insulated, sheathed and armoured and twin, pair PVC

insulated wires drawn in heavy gauge PVC conduits. Cables shall confirm to I.T.D.

specification.

.

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S-7

SCHEDULE OF CIVIL WORKS & SCOPE OF

ELECTRICAL CONTRACTOR

1. Civil Works under scope of Electrical Contractor.

1.1. Excavation and concreting of vertical members of Switch-yard structure.

1.2. Inspection chambers for earthing Stations.

1.3. Excavation for under-ground cable trenches including supply and laying of sand /

bricks and reinstatement of trenches including ramming and making the soil as per

original.

1.4. Excavation and refilling of earthing pits including supply and spreading of salt and

coal.

1.5. All MS supports / trays etc. for cables / M.S. Channels for mounting lighting

fittings/structure or wall mounting L.D.Bs. etc.

1.6. Grouting (including foundation bolts) of floor mounting lighting Switch-boards unless

otherwise specifically mentioned these and similar fabrications shall be necessarily

carried out by Electrical Contractor. Further, unless otherwise specifically mentioned,

cost of supply and creation of these fabricated structures, is supposed to be included in

respective items.

2. Civil Works under the scope of Civil Contractor.

2.1. Cement concrete foundation for equipments such as Breaker, Transformers etc.

2.2. Switch-yard fencing including doors etc.

2.3. Metal / Gravel to be spread inside the switch-yard including leveling. However, this

work shall be carried out under direct supervision of the Electrical Contractor.

2.4. Meter Room.

2.5. Soak Pit(s) and piping for the same (for draining of Transformer Oil).

2.6. Protection walls in between the transformer.

Although above Civil works are to be carried out by Civil Contractor, it will be

Electrical Contractor’s responsibility to furnish drawings for these well in time, co-

ordinate and get the works completed under his direct supervision, well within schedule to ensure commissioning of the installation on agreed date.

185

S-8

TEST TO BE CARRIED OUT

1 TESTS AT MANUFACTURER’S WORKS

These shall be carried out at Manufacturer’s works as per relevant IS specifications. Copies of

these certificates shall be submitted in the O & M manual.

2 SITE TESTS

Following Tests shall be carried out in the presence of the Owner's representative / Consultant.

Equipments / Transformer / Switch-boards

a) Transformers

a.1 Visual inspection for apparent damage, broken parts, cracks, leaks, oil level, etc.

a.2 For transformer, 3 samples of the transformer oil shall be taken from the bottom

of tank and shall be tested to withstand 50 KV for 60 seconds against 2.5 mm

gap as described in the appendix of IS : 335 ( Latest Edition )

a.3 Insulation Resistance Tests by Minimum 5000 V D.C. Meager. The values shall

correspond to factory test results.

a.4 Wherever the oil sample tests and IR values are not satisfactory ( in the opinion

of Consultants ) transformer shall be dried out using stream line filter. The

drying process shall be continued till the Insulation Resistance Curve shows a

steady and definite increasing trend and the meager Value shall be not less than

20 Mega Ohms per KV.

a.5 All transformer accessories such as Buchholtz Relay, breather, gauges,

thermometer, etc. shall be thoroughly checked and adjusted.

a.6 Ratio Test ( By using AVOMETER )

a.7 On energisation the new transformers shall be kept on NO LOAD for

minimum 24 hours.

3 M.V. Switch-Boards / Equipments :

b.1 Insulation Resistance tests with 5000 V megger with switches in closed position

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Minimum acceptable results.

Phase to Phase 50 Mega ohms.

Phase to Earth 50 Mega ohms.

b.2 Switch-Boards including secondary wiring to be subjected to 2 KV tests for 1

minute.

b.3 Meters and Relays to be calibrated through secondary injunction tests

c) Cables

Insulation Resistance Tests by 5000 V Meager between phases and between all phases

and earth.

d) Conduit Point Wiring / Switches / Sockets

d.1 Insulation Resistance Test

d.2 Earth Continuity Test

d.3 Polarity test for single switches

e) Earthing

Earth meager tests shall be carried out on following :

a. Each Earthing station.

b. Earthing System as a whole.

c. Each continuity conductors.

***

187

S-9

GENERAL TERMS & CONDITIONS OF THE CONTRACT

1. Definitions :

In construing this contract as defined in “e” below following words shall have the meaning herein

assigned to them, except where the subject or contract otherwise requires :

a) OWNERS:

CLIENTS

and shall include his/ their legal representatives, assign/s or successor/ s.

b) CONTRACTOR : Shall mean successful Tenderer :

(To be filled up after award of contract)

-------------------------------------------------------------------

and shall include his/ their legal representative/s, assign/s or successor/ s.

c) Project Consultants : Shall mean : SHASHI PRABHU AND ASSOCIATES

Plot No. 783/B, opp. Kamla Nehru Park,Shivaji

Nagar, Pune – 411004.

and shall include his / their legal representative / s, assign / s or successor / s.

d) SITE: Shall mean place of work under this contract.

e) CONTRACT: Shall mean invitation to tender, other sections, under this

tender document including (not limited to) Terms / Conditions,

Drawings, Specifications, Price Schedules attached hereto and

duly signed by “Owners” and “Contractor” including such

deviations to Tender Terms signed and accepted by both

“Owners” and Contractor” as per the contract agreement.

f) SPECIFICATION: Shall mean specifications, drawings, general conditions of

Contract, special conditions of contract, any other terms

specifying Owners requirements pertaining to the Contract,

Technical / Commercial / Others annexed to the Contract.

g) “PLANT” Shall mean and include plant, equipment and

“EQUIPMENT” material to be “supplied and erected” or

“STORES” WORK “erected only” and work to be done by

OR WORKS” the Contractor under the Contract.

h) TESTS : Shall mean all pre-commissioning tests, tests on completion,

tests at Manufacture’s works as per this contract and as per

relevant IS SPECIFICATIONS.

i) CONTRACT VALUE: Total value of the scope of work under the contract.

The plurals will imply singular and vice-versa.

188

2. SCOPE OF WORK:

Contractor’s scope shall include work as per Tender documents along with implied minor works

mentioned specifically or not. This scope shall be generally as per Contract Agreement and shall

include such additional jobs as may be required to be carried out for the completion of the

“Electrical” facilities in the opinion of the Owners / Consultant. Any additional major jobs / items

required to be carried out shall be evaluated on the basis of similar item-rates under the contract or

where such similar items do not exist the contractor shall submit cost analysis to arrive at the item-

rates for the approval of Owners / Consultant. 15 % over-heads and profit shall be allowed to the

Contractor on cost accepted by Owners / Consultant.

3. ADDITIONAL WORK:

Any additional work if required / ordered by the Owners / Consultant shall be taken up and

completed within the agreed time schedule. The item-rates for such work shall be submitted for the

approval of Owners / Consultants, but the work shall start immediately upon receiving instructions

by the Contractor from the Owners / Consultant.

4 EQUIPMENT / WORKMANSHIP:

The equipment to be supplied under this contract shall be strictly as per specifications of the

contract and relevant IS specifications. In the event of any ambiguity / dispute, the Owners /

Consultants verdict shall be final and binding on the “Contractor”.

5 SUPPLY, ERECTION, TESTING, COMMISSIONING AND MAINTAINING THE

EQUIPMENT DURING THE MAINTENANCE PERIOD (DEFECTS LIABILITY PERIOD)

Item rate for “Supply, erection” shall include unloading at site stores (by crane if required by

Owners / Consultant, shifting to place of work, erection, testing, commissioning, handing over to

Owners and attending the equipment during Defects Liability period. The erection shall be as per

contract specifications and relevant IS

Specifications. The contractor shall obtain, before, during and after completion of erection,

approval from K.S.E. Board and Electrical Inspector, other Statutory Authorities as and where

required.

6. ORGANISATION CHART : SUPPLY

The Contractor shall submit “Organization Chart” for the Technical and other staff he proposes to

depute at site during the execution of Contract. The Chart should also show specific responsibility

189

& decision making authority for “on site” decisions.

7. DEFECTS / MODIFICATIONS:

If in the opinion of Owners / Consultant / Statutory authorities the work carried out by the

Contractor is defective, the Contractor shall without any additional cost to Owners, rectify such

defects or carry out such modifications to make the work “complete” in all respects and acceptable

to the Owners / Consultant / statutory authorities. If any test readings are not satisfactory, the

Contractor shall carry out required modifications (which may include even replacement of certain

item / s) without any additional cost of whatsoever nature to Owners. The work shall be guaranteed

to yield the specified rating(s) design conditions within tolerance as per relevant IS Specs. Any

equipment, which in the opinion of the Owners / Consultant does not meet specified requirements

for which it is installed, may be rejected and Contractor shall replace it free of cost and within such

time as may be reasonably allowed to him.

8. COMPLETION CERTIFICATE:

On completion of Erection the Contractor shall inform the Consultant for witnessing the site tests.

Required tools / instruments for such tests shall be arranged by the Contractor. The equipment

shall be commissioned only after obtaining written acceptance of pre-commissioning tests (which

shall be carried out as per requirement of Owners / Consultant). At this stage the Consultant shall

issue “Completion Certificate” to the Contractor. The Owners / Consultant reserve the right to

issue the completion certificate in parts. If due to Contractor’s inefficiency the Contractor’s

completion certificate is delayed, the Owners reserve their right to put the equipment to use. The

“Maintenance Period” OR defects liability period shall start from the date of completion to the

satisfaction of the Owners / Consultant’s as mentioned in the completion certificate. Before issue

of completion certificate, contractor shall supply “AS BUILT DRAWINGS” and “OPERATION”

& “MAINTENANCE MANUALS” as per relevant clause.

9. COMPLETION CERTIFICATE WITH SNAG LIST:

If in the opinion of Owners / Consultant the defects in the work are minor, the Consultant may

consider issuing “Completion Certificate” for the Contract along with the Snag list for which the

Contractor shall give an undertaking that the Snags shall be attended and rectified within three (3)

months from the date of completion certificate. The right of issuing such a certificate lies

exclusively with the “Owner”.

190

10. DEFETCS LIABILITY PERIOD AND THE FINAL ACCEPTANCE CERTIFICATE:

Defects Liability Period shall commence on the date of completion mentioned in the completion

certificate (with or without Snag list) and shall last for one year. On completion of the “Defects

Liability Period” the Owners / Consultant shall carry out final inspection of work and issue / list of

defects / snags. The Contractor shall attend to and rectify these snags / defects immediately.

During the Defects Liability Period, if there is any defect in the work carried out by the Contractor

the Owners / Consultant shall inform the Contractor who would attend to and rectify such defects

immediately. At the end of the Defects Liability Period and after rectification of all snags, the

Consultant shall issue “Final Acceptance Certificate”. The retention amount or Bank Guarantee

shall be released by the Owners within 15 days (or earlier) of presentation of “Final Acceptance

Certificate” by the Contractor. If after defect rectification, the item is not acceptable to Owners /

Consultant, the Contractor shall replace the item by right quality item, free of cost. The nature and

quantum of defect, its reporting to the Contractor, contractor’s response thereof shall be recorded

in writing by the “Owner” and acknowledged by the Contractor / Consultant as the case may be.

11. DELIVERY / COMPLETION SCHEDULE:

The Contractor shall strictly adhere to agreed Delivery / Completion Schedule (or revised schedule

agreed to by Owners.)

12. EXCEPTED RISKS (FORCE MAJEURE CLAUSE)

A) The “Accepted Risk” are riot (in so far as it is uninsurable) war, invasion, act of foreign enemies,

hostilities (whether war be declared or not), civil commotion, rebellion, revolution, insurrection or

military or unsurpsed power, sabotage, fire, floods, explosions, epidemics, quarantine restrictions,

earthquakes, damage by aircraft, and ACTS of GOD or any cause for which owners are

responsible for the delay in execution / completion of work by Contractor.

B) The above mentioned FORCE MAJEURE EVENTS shall not include constraints which could

prudently be foreseen like shortage of power, non-availability of raw materials, difficulties in

making transport arrangements etc.

13. SUPPLY VOLTAGE:

H V 11000 / 22000 Volts 3 Phase 3 Wire 50 Hz +/- Variation as received from Supply Company.

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L.V. : 433 Volts / 250 Volts 3 Phase 4 Wire 50 C.P.S. earthed natural system.

14. AMBIENT TEMPERATURE / WEATHER CONDITIONS:

The Contractor shall take into account prevailing Ambient Temperature / Weather conditions at

site while designing the equipment. (Ambient Temperature shall be as per relevant IS Specs.

15. MAKES OF THE EQUIPMENTS:

Makes of equipment as per List of approved make. The Contractor shall specify Makes of the

equipment offered. These shall be reputed makes and shall be subject to the approval of Owners /

Consultants.

16. WORKING DRAWINGS: (As Applicable)

Within 1 week of award of order the Contractor shall submit 4 sets of the following drawings for

approval. (As applicable)

- HT work Switchyard drawing to be submitted for Electrical Inspector’s approval.

- Drawings for Switchboards

- Layout drawings showing earthing layout.

- Layout drawings showing cable routes.

- Layout drawings for lighting showing locations of points and lighting D.Bs.

- Foundation drawings for the equipments to be supplied and erected by the

Contractor.

- Layout of Trenches, if any, (Owners reserve right not to provide trenches if site conditions do not

permit.)

- Drawings showing cut-out / opening / inserts / pockets required (If these drawings are not

submitted in time, the Contractor may be required to carry out this work at his cost.)

- Drawings showing sleeves / Hume-pipes / R.C.C. Pipes for laying cables at road crossings.

- Any other drawings as may be required by Owners / Consultant for smooth running of Project

and overall completion.

17. MANUFACTUR’S DRAWINGS / CATALOGUES:

These shall be submitted in 3 sets, within weeks of date of award of the order OR letter of Intent.

18. AS BUILT DRAWINGS & “ OPERATION & MAINTENANCE MANUALS”

3 (Three) Sets Hard copies along with 1 set of CD shall be supplied. These shall include (this is not

exclusive list).

a) Detailed layouts of equipment / cables / earthing / lighting system etc., as installed.

b) Manufacturer’s Operation & Maintenance instructions. (As Applicable)

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c) Test Results (after Consultant’s acceptance).

d) A file containing all original KSEB / EI Drawings / Approvals / Sanction Letter / Test Reports

etc.

e) Contractor’s instructions for routine maintenance of the contract items.

f) Any other drawings / detailed deemed necessary by the Owners / Consultant for satisfactory

maintenance of the work.

g) List of recommended spares for 2 years operation. (As Applicable)

19. CARE OF WORKS:

From commencement to the completion of works the Contractor shall take full responsibility of all

works related to this contract and those of other agencies, including temporary works. In case of

any damage, loss or injury to the works (either of Contractor’s or other agencies) except for causes

defined under Accepted Risks Clause, the Contractor shall repair / make goods or replace such

damaged items at his own cost and make the same good and acceptable. The Contractor is also

liable for any damages to the works (his or other’s) occasioned by him in the course of any

operations carried out by him for the purpose of carrying out his obligations. Any delay occurring

on account of any of the above shall be to the account of Contractor. Contractor may employ

watchman for the safe custody of materials. Security and Safety of all works related to this contract

is Contractor’s sole responsibility. This is subject to Accepted Risks under clause R – 16 above.

20. COMPREHENSIVE INSURANCE OF WORKS / LABOURS:

The Contractor must take comprehensive insurance all risk policy to cover his works / labors

against all risks and include the cost of his policy in the tender price.

21. DAMAGES TO PERSONS / PROPERTY & THIRD PARTY INSURANCE:

The Contractor shall take every practical care and precaution not to damage or injure any adjoining

or other properties (including the property of the owners) or any persons. He shall indemnify and

keep indemnified the owners against all claims for injuries or damages to any person or any such

property whatsoever which may arise out of or in consequence of construction and maintenance of

the works and against all claims, demands, proceedings, damages costs, charges and expenses

whatsoever in respect of or in relation thereto. The Contractor should also cover above by means

of third party insurance in the joint name of the Contractor and Owners. All the charges / costs for

the same would be borne by the Contractor.

22 ACCIDENT OR INJURY TO STAFF / WORKMEN:

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The Owners shall not be liable for or in respect or in consequence of any accident or injury to any

workmen or other person in the employment of the Contractor or his Sub-Contractor and the

Contractor shall indemnify and keep indemnified the Owners against all such damages,

compensation and against all such claims, demands, proceedings, cost charges and expenses

whatsoever in respect thereof or in relation thereto.

23. INSURANCE AGAINST ACCIDENT, FIRE ETC. TO WORKMEN:

The Contractor shall insure against such liability with an insurer (approved by the Owners) and

shall continue such insurance during whole of the time such person/s are employed by him or his

Sub-Contractor for the contract. The Insurance Policy with up-to-date premium payments receipt

shall be produced for inspection when asked by the Owners. After the Contract is awarded

contractor shall take out “Workmen’s compensation” and “Contractor’s All Risk” Insurance

Policies and indemnify the client for the same.

24. COMPLIANCE OF ABOVE CLAUSES:

It is obligatory on the part of the Contractor to comply with all the clauses mentioned above and

the tender price is supposed to include costs of implementation of the above clauses. If any of the

liabilities such as Insurance Policies are not discharged satisfactorily by the Contractor, the

Owners will arrange to implement the clauses and costs, if any, shall be recovered by the Owners

from the Contractor’s bills.

25. RISK PURCHASE CLAUSE:

If in the opinion of the Owners / Consultant, the Contractor fails to perform and discharge his

obligations at any time during tenure of the contract including Maintenance period, the Owners

shall give 7 days notice in writing to the Contractor to improve his performance. If the Contractor

fails, the Owners reserve the right to cancel the whole or part of the order and get the same carried

out by other agencies at the Contractor’s risk, cost and responsibilities and recover the costs from

the Contractor’s outstanding bills or Security Deposit or Retention amount.

26. LABOUR LAWS ETC. :

The Contractor shall abide by the provisions of State / Central Govt. / Local Labour Laws and

194

discharge his obligations towards any liability arising out of such Laws in respect of his workers /

Sub-Contractor’s Workers. In case, the Contractor fails to comply with the Law requirements, the

Owners will have to intervene and settle the demands / disputes of the Contractor or his Sub-

Contractor’s Labour and debit the cost to the Contractor’s account. The Contractor shall maintain

all such records for the presence of his labour / other people as may be required. In no case, the

same would be mixed up with records of the Owner / his other Contractors.

27. WORKMANSHIP:

Good Workmanship and neat appearance are pre-requisites of the Contract. Work shall be carried

out in accordance with statutory rules and regulations in force and confirm to KSE.Board

standards, Electrical Inspector’s requirements I.E. Rules and relevant IS Specifications.

28. TOOLS & SPARE PARTS :

All special Tools and Tackles required for the proper erection and assembly of equipments covered

by the contract shall be obtained by the Contractor himself. All sundry materials such as

foundation bolts, nuts etc., required for the erection of equipments / Switch-boards including base

channels required to raise the level of the Switch-boards shall be included in the erection costs of

respective items. Necessary scaffolding shall be provided by the Contractor. Scaffolding shall be

so fastened that Swaying / Swinging from structure or Building shall be prevented.

29. QUANTITIES :

Quantities mentioned in the tender documents are approximate and tenderer is advised to check

these with his working drawings and arrive at actual required quantities as per site conditions,

before placing order. In any case, the payment will be made on the basis of finally supplied and

erected quantities on completion of work. Owners keep option to pay for any additional quantities

left balance and not erected, but do not bind themselves to do so.

30. DISPUTE / AMBIGUITIES:

In case of Disputes / Ambiguities while interpreting any of Tender / Contract conditions Owner’s /

Consultant’s decision in the matter shall be final and binding.

31. OBSERVANCE OF RULES / REGULATIONS / ACTS:

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The Contractor will have to observe all the rules and regulations prescribed under the Factories

Act, Provident Fund Act, ESI Act, Shops and Establishment Act, Workmen’s Compensation Act

and such other Acts and Labour Laws as may be applicable and any liability arising out of non-

observance of the regulations and Acts in respect of his employees or his Sub-Contractor

employees, in respect of this Contract work, will have to be fully assumed and met by the

Contractor. The Contractor should ensure that he satisfies all the above regulations / acts, etc.

32. QUANTITIES:

Tenderer to note that No Claims for loss / compensation / escalation on the grounds of increase /

decrease in the quantities indicated in the tender schedule of quantities, shall be entertained under

any circumstances, nor will the Contractor shall be entitled to prefer any claims whatsoever on

these grounds.

33. SITE SUPERVISIONS & SITE INSTRUCTION BOOK:

The Contractor shall deploy qualified and responsible Engineer at site for site supervision and

these Engineers shall be available at site during working hours to take instructions and answer

queries.

34. CO-ORDINATION OF WORK:

The Contactor shall co-ordinate his work with those of other agencies and the Consultants /

Owners shall decide the priorities.

35 SAFETY MEASURES:

The Contractor shall provide all “Safety Measures” such as Safety Belts, Helmets etc., and shall

provide proper temporary lighting for his scope of work.

36. KSEB Co-ordination / Approval / KSEB Power Supply / Electrical Inspectors Approval etc.

LIASON & CO-ORDINATION with KSEB and Electrical Inspectorate for following:

a) Preparation of Load Sanction application, follow up, and obtaining load sanction.

b) Approval of Installation Drawings before start of work.

c) Survey & approval of Installation location.

d) Inspection and approval of the installation.

e) Co-ordination with KSEB & EI for commissioning of the installation.

196

f) Any other activity / approval related to the scope of this tender.

g) Submission of required Test Reports to E. I. / KSEB

The Contractor is responsible to obtain above well in time and ensure completion and

commissioning within the scheduled completion date.

37. The contractor shall make good all civil works damaged / disturbed by him while carrying out

Electrical Installation, immediately after installation work or in any case before end of the contract.

----------- X -----------

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S-10

APPROVED MAKES FOR ELECTRICAL SYSTEM

NOTE : CLIENT RESERVES RIGHT TO ASK FOR ANY OF THE FOLLOWING APPROVED

MAKES TO BE USED DURING EXECUTION OF WORK. CONTRACTOR SHALL INDICATE

WHICH MAKE HAS BEEN CONSIDERED WHILE QUOTING THE RATES.

SR.

Nos

EQUIPMENT

MAKES

1 GOD, DO, INSULATORS KIRON / PACTIL / UNIVERSAL

2 LIGHTNING ARRESTORS ELPRO / CROMPTION / KIRON

3 HT SWITCHGEAR (SF6 /VCB's) ABB / SCHNEIDER / CROMPTION /

SIEMENS

4 XPLE CABLE JOINTS (H.T.) RAYCHEM / M-SEAL / BIRLA 3M

EQUIVALENT

5 L.T. ACB's / MCCB's L.T.FUSE

SWITCH & SWITCH FUESE /

CONTACTORS

SIEMENS / SCHNEIDER / L &

T/CROMPTON/PHILIPS

6 CHANGE OVER SWITCHES HPL / L & T/ CROMPTON/PHILIPS

7 METERS (ANALOG) / DIGITAL RISHAB ( L & T ) / AE /

SECURE/ENERCON/

CONZERVE/SCHNEIDER

8 CTS / PTS AE / KAPPA / GYRO / PRAGATHI/

CROMPTON/PHILIPS

9 TRIVECTOR METERS (ELECTRONIC

TOD WITH BATTERY BACK UP )

LOAD MANAGER

ABB / L & T / SECURE / ABB/ OR

APPROVED SUPPLY CO.

10 INDICATING LAMPS (LED ONLY) & ALTOS/TEKNIK/RASS/CROMPTON/P

198

PUSH BUTTONS HILIPS

11 RELAYS (PROTECTIONS) EE / AVKSCGC / ESSUN / L & T

/SIEMENS/ CROMPTON/PHILIPS

12 MCB DISTRIBUTION BOARD , MCB ,

RCCB

MDS/SIEMENS/HAGER/

CROMPTON/PHILIPS

13 CABLES (H.T. / L.T.) FINOLEX / CCI / POLYCAB /

GLOSTER/RPG /NICCO

14 CABLS GLANDS ( HEAVY DUTY) DOWELLS / COMMET / GRIPWELL /

BRACO

15 TELEPHONE CABLES FINOLEX / DELTON / POLYCAB/RPG

16 TELEPHONE TAG BLOCKS ITI / KRONE

17 SWITCH ACCESSORIES, TELEPHONE

SOCKETS CEILING ROSE, HOLDERS

ANCHOR '' ROMA '' (TRESSA)

LEGRAND ( MOSIC) / CLIPSAL /

18 PVC CONDUIT & ACCESSORIES PRECISION, / DIAMOND/FINOLEX

19 CASING CAPPING MODI / PRECISION / DIAMOND

20 WIRES (FRLS ONLY) FINOLEX / RPG / POLYCAB / R R

CABLE

21 DATA CABLE NORDEX / AVIYA / AMP

22 LIGHTING FIXTURES & LAMPS PHILIPS / GE / WIPRO / BAJAJ

/CROMPTON

23 CEILING FANS / WALL / PEDASTA

FANS

CROMPTON / ORIENT / BAJAJ /GEC

24 EXHAUST FANS CROMPTON / BAJAJ / ALMONARD /

GEC

25 A. P. P. TYPE CAPACITORS PROBHODHAN / MEHAR / ASIAN

26 APFC RELAY BELUK / NEPTUNE DUCATI / RMI

27 TERMINALS WAGO/ ELMEX /CONNECTWELL

28 INDUSTRIAL SOCKETS (METAL CROMPTON / LEGRAND /

SCHNEIDER

199

CLAD)

29 SELECTOR SWITCH SALZER / KAYCE

30 STEEL TUBLAR POLE

JINDAL / POWER CONTROL CORP /

BOMBAY POLES / INDIA POLE

31 AUXILLARY RELAYS

ALSTOM / SIEMENS / L & T/

SCHNIDER

32 BATTERY CHARGER

VOLTSTAT / BCH / AMAR RAJA /

SAB KNIFE / REPUTED

33 SEALED MAINTENANCE FREE

BATTERY

EXIDE / AMAR RAJA / GLOBAL /

YUASA

34 TRANSFORMER KIRLOSKAR / UNIVERSAL /

CROMPTON / BHEL/ABB/KEL

35 LIGHTNING PROTECTION SYSTEM INGESCO / DMSGI / Indelect,/ Duval

messien

36 EARTHING STATIONS

TERRAFILL / SAFE / ASHLOK

37 HFFR INSULATED COPPER / FLUX

WIRES

R.R.KABEL / FINOLEX / POLYCAB /

ANCHOR

38 U G CABLE

NICCO / FINOLEX / POLYCAB

GLOSTER

39 CABLE SOCKET / SOCKET FOR

CONDUCTOR

DOWELLS / SIECO / JAINSON

40 PVC CONDUCT( ISI MARKED ) AVON PLAST / PRECISION

41 PVC ACCESSORIES PRECISION / CIRCLE ARK

42 DWC PIPE REX POLY EXTRUSION

43 GI PIPE/MS PIPE TATA / JINDAL

44 MODULAR BOXES / FRONT PLATES /

SWITCHES / SOCKETS /

REGULATORS

MK INDIA WRAP ROUND /

SIEMENS VEGA / ANCHOR WOODS /

ABB

45 CEILING ROSE (ISI MARKED POLY

CARBONATE BODY)

ELLYES / SSK / ANCHOR / CPL

46 MCB 10 / CA RATED / MINIATURE

TYPE ISOLATES / RCCB / REBO

LEGRAND / MERLIN GERIN / GE /

HAGER

47 MCCB AC-3 RATED SIEMENS / LEGRAND / MERLIN

GERIN / ABB(T max)

200

48 POWER CONTRCTORS(AC-3 RATED) L & T / SIEMENS / SCHNEIDER

49 SDF / ISOLATORS / COS(AC-23A) /

HRC FUSES

L&T / GE / SIEMENS / MERLIN

GERIN

50 SELECTOR SWITCHES KAYCE / SALZER

51 METER (DIGITAL) CONZERVE / SCHNEIDER

52 METER(ANALOGUE) RISHAB / AEI

53 LED TYPE PHASE INDICATION TELE MECHANIQUE /

SIEMENS / L&T / GE

54 COMPACT FLOURACENT LAMP PHILIPS / OSRAM / BAJAJ / GE

55 SV LAMP FITTINGS SGP 325 PHILIPS / BAJAJ BGEST/ GE

56 TRANSFORMER KEL / INTRANS UNIPOWER / MEGE

WIN

57 11 KV LBS MEGEWIN / INTRANS / SIEMENS /

ABB

58 APFC RELAY L&T BELUK / SIEMENS /

ABB / SCHNEIDER

59 APP CAPACITOR / BLOCK REACTORS MEHER / SHREEM /

SPRAGUE / EPCOS

60 CEILING FAN CROMPTON / BAJAJ / ORIENT

61 TUBE LIGHT FITTINGS / MIRROR

OPTIC FITTINGS

PHILIPS / BAJAJ / GE

62 MH LAMP FITTINGS PHILIPS / BAJAJ

63 FIRE PUMP MOTOR KIRLOSKAR / CROMPTON /

BEACON

64 DOL STARTER L&T / SIEMENS / SCHNEIDER

65 HYDRANT VALVE BRANCH PIPE NEW AGE / VINCO / ZENITH

66 GM VALVE KALPANA / KIRLOSKER /BENDCO

67 FIRE HOSE FIREX / NEW AGE / CRC / ZENITH

68 HOSE REEL KANTEK / KANTA FLEX HOSE

69 SLUICE VALVE KALPANA / KIRLOSKER / INTOV

VALVE

70 REFLUX VALVE KALPANA / KIRLOSKER / BENKO

201

For all equipments Standard reputed manufacturers will also be considered based on final

approval from Client / Consultant

The client has the right to choose any one make even though alternate makes are specified

with out any cost implication.