Date: 08.09.2021

Tender Document No. P.014715 D 11031 008

Project: CGD Expansion Project

Owner: Indraprastha Gas Ltd.

Sr. No. Description Tender Page No. Clause/ Para/ Section

1PTS - Technical specification

of compacted substation.- PTS P.014715 G11077 E011 Addition Technical specification of compacted substation is added as PTS P.014715 G11077 E011 in the Technical Volume II of II.

CORRIGENDUM #2

COMPOSITE WORKS FOR CONSTRUCTION OF CNG STATIONS IN THE STATE OF DELHI, HARYANA,

RAJASTHAN AND UTTAR PRADESH

(IGL TENDER NO. IGL/ET2/CP/CC16543)

Amendment/Addition/Modification/Deletion

Note:

1. All other terms & conditions of tender document remain unaltered.

2. Bidders are requested to visit IGL website / IGL's tendering website https://petroleum.euniwizarde.com / Tractebel website regularly for further announcement .

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PTS – CSSP.014715

G11077E011

INDRAPRASTHA GAS LIMITEDCITY GAS DISTRIBUTION PROJECT IN NCT OF DELHI

& NCR REGION, UP, HARYANA, RAJASTHAN(IGL)

PTS – COMPACT SUB-STATION

P.014715 G11077 E011

0 06.09.2021 Issued for Tender BNH BNH SKH

Rev. Date Description Prepared By Checked By Approved By

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G11077E011

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TABLE OF CONTENTS

1.0 SCOPE ................................................................................................................................ 1

2.0 REFERENCE STANDARDS ................................................................................................... 1

3.0 AMBIENT CONDITIONS ...................................................................................................... 2

4.0 POWER SYSTEM DETAILS .................................................................................................. 2

5.0 METERING CURRENT TRANSFORMER ................................................................................ 2

6.0 PROTECTION CURRENT TRANSFORMER ............................................................................ 2

7.0 CABLE ENTRY (TOP/ BOTTOM) : BOTTOM ...................................................................... 2

8.0 SUPPLY .............................................................................................................................. 3

9.0 SPECIFIC FEATURES .......................................................................................................... 3

10.0 MANDATORY SPARES ......................................................................................................... 5

å å å

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1.0 SCOPE

Scope of work includes Design, Manufacturing, Supply, Installation, Testing & Commissioning ofCompact Sub-station as per GA, SLD provided in this specification.

2.0 REFERENCE STANDARDS

· IEC 61869 : Instrument transformers

· IEC 60005 : Direct acting indicating analogue electricalmeasuring instruments and their accessories.

· IEC 60186 : Voltage transformers

· IEC 60255 : Electrical relays.· IEC 60288 : PVC-insulated cables for switchgear and

control gear wiring.

· IEC 60417 : Graphical symbols for use on equipment.

· IEC 60439 : Low-voltage switchgear and control gear assemblies.

· IEC 60529 : Degrees of protection provided byenclosures. (IP Code)

· IEC 60688 : Electrical measuring transducers for convertinga.c. electrical quantities to analogue or digitalsignals.

· IEC 60715 : Dimensions of low-voltage switchgear and control gear. Standardized mounting on rails for mechanical support of electrical devices in switchgear and control gear installations

· IEC 60947 : Low-voltage switchgear and control gear.

· IEC 61000-4 : Electromagnetic Compatibility (EMC).

· IEC 61346-1 : Industrial systems, installations and products– Structuring principles and referencedesignations.

· IS 8623 (Part 1) : Low Voltage switchgear and control gearassemblies: Part 1 Requirements for typetested and partially type tested assemblies

· IS 13947 (Part 1) : Low Voltage switchgear and control gearassemblies: (Part 1) General rules

· IS 13118 : Specification for High Voltage AC CircuitBreaker.

· IS 3427 : AC metal enclosed switchgear and controlGear for rated voltages above 1kV & up to& including 52kV.

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· IS 1180 (Part 1) : Outdoor type oil immersed DistributionTransformers Up to and including2500kVA, 33kV

· IS 13947 (Part 1) : Specification for Low Voltage switchgearand control gear : (Part 4) Contactors andmotor starters, sec 1 Electromechanicalcontactors and motor starters (Superseding

· IS 2959 and IS 8544 (all parts))

· Indian Electricity Rule as amended up to date, any other relevant local law codes & regulations(Latest edition) applicable, shall meet requirement for switchboard & associated material.

3.0 AMBIENT CONDITIONS

Max/Min. Region Temperature - 50°C / 5°C

Max/Min. Design Temperature - 55°C / 0°C

Max/Min Region Relative Humidity - 100% / 5%

Altitude above MSL- : Less than 1000 MTS

Atmosphere- : Tropicalized to withstand the site condition,

dust & Vapor

Location- : Indoor

4.0 POWER SYSTEM DETAILS

Voltage with ±% 11kV & 415 V ± 20%Frequency with ±% 50 Hz ± 5%No. of phase & wire 3P + 1NFault level 35kA for 1 sec

5.0 METERING CURRENT TRANSFORMER

VA : As per SLD

Accuracy class : As per SLD (Class 1.0)

6.0 PROTECTION CURRENT TRANSFORMER

VA : As per SLD

Protection class : As per SLD (Class 5P10)

7.0 CABLE ENTRY (TOP/ BOTTOM) : BOTTOM

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8.0 SUPPLY

Please refer SOR.

The requirement of CSS may be change or vary as per actual site condition.

Obtaining electrical inspector NOC shall be in scope of contractor.

i) It is not the intent to specify completely herein all details of the equipment. Nevertheless, theequipment shall be complete and operative in all aspects and shall conform to highest standard ofengineering, design and workmanship.

ii) Any material or accessory which may not have been specifically mentioned but which is necessaryor usual for satisfactory and trouble-free operation and maintenance of the equipment shall befurnished without any extra charge.

iii) The Contractor shall supply all brand-new equipment and accessories as specified herein with suchmodification and alteration as agreed upon in writing after mutual discussion.

9.0 SPECIFIC FEATURES

Sl. No. System Parameters Design/ Feature

A. MV Parameters

RMU make Siemens, ABB, Schneider, Power Tech,

MV Switchgear 630A, 3 Way RMU

MV Voltage 11kV

MV System 3 phase 3 wire

VCB make Siemens, ABB, L&T

B. Transformer Parameters

Make CGL, VOLTAMP, POWER STAR, GE, ABB,Transformers & Rectifiers India Ltd,

Rating (kVA) 3 Star, As per SOR

Primary Voltage 11kV 50Hz

Secondary Voltage 433V

Type Oil type

Winding material Copper

Vector group Dyn11

Tap changer Off-Circuit

C. LV Parameters

LV System 3 Phase 4 Wire

LV Voltage 433V, 50Hz

D. Wiring MV/LV

Wire type PVC insulated Cu wire multistranded, flexible

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Insulation grade 1.1kV

Control circuit AC/DC 1.5 Sq.mm (Grey/ Black)

CT circuit 2.5 Sq.mm (Red, Yellow, Blue, Black)

Earthing Wire 2.5 Sq.mm. Green

Circuit identification Printed ferrules at terminations

E. Enclosure

Installation of CSS Outdoor (Weatherproof enclosure) with Twin Canopy

Mounting of CSS On foundation

Lifting arrangement Shall be provided

Transformer compartment access Hinged door

LV Compartment access Hinged door

MV Compartment access Hinged door

Recommended clearance around enclosure 150mm on operational faces

600mm On Non operational faces

Material for enclosure GI Sheet Steel, 2mm thick for Outdoor

CRCA Sheet Steel, 2/1.6mm thick for LV

Base frame ISMC 100x50x5mm

IP protection for Transformercompartment

IP 23

IP protection for MV & LV compartment IP 54

Type of ventilation for Transformercompartment

Natural

Paint Powder coated

Paint material Pure Polyster based Powder

Paint finish Structure finish

Paint shade Enclosure – RAL 7035, Top ring – Blue

Paint thickness Minm. 80 micron

Interconnection between RMU &Transformer

Cable

Interconnection between Transformer toBreaker

Aluminum Busbar

Earth Bus for Enclosure Aluminum Busbar

Neutral Earth Bus Cu. Busbar

MV/LV Cable Entry Bottom through Gland Plate

F. Final Testing Overall dimension, BOQ, Functional Test, Physicaloperation of equipment, Insulation resistance, HV test,IR after HV.

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10.0 MANDATORY SPARES

As per Manufacture standard.

å å å

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CSS indicative layout for illustration purpose only.

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