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  • VISAKH MARKETING INSTALLATION RESITEMENT PROJECT BLACK OIL TERMINAL

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    SPECIFICATION

    FOR MAJOR ELECTRICAL EQUIPMENT

    Hindustan Petroleum Corporation Ltd Visakha Dispatch Station VR-ATP Area, Naval Base Post

    Visakhapatnam - 530 014 Andhra Pradesh

    Mott MacDonald Consultants (India) Pvt. Ltd. Kothari House, CTS No. 185 Off Andheri - Kurla Road Andheri (East) Mumbai 400 059

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    List of Contents Pages

    1.0 Introduction .................................................................................................................... 5 2.0 Location and Environmental Conditions........................................................................ 5 2.1. Plant Location .................................................................................................................5

    2.2. Environmental Conditions ..............................................................................................5

    2.3. Electrical System Data....................................................................................................5

    3.0 Scope of Supply.............................................................................................................. 6 3.1. Electrical Equipment; .....................................................................................................6

    3.2. Engineering Services ......................................................................................................8

    3.3. Exclusions.......................................................................................................................8

    4.0 Codes and Standards....................................................................................................... 9 4.1. General............................................................................................................................9

    4.2. Conflicting Requirements ...............................................................................................9

    5.0 Design requirements ....................................................................................................... 9 5.1. General............................................................................................................................9

    5.2. 33kV Switchgear.............................................................................................................9

    5.3. LV Switchgear ................................................................................................................9

    5.4. DC system (Battery & Battery Charger System) ............................................................10 6.0 Name Plates .................................................................................................................. 10 7.0 Makes Of Components ................................................................................................. 11 8.0 Painting & Finishing:.................................................................................................... 11 9.0 Inspection and Testing.................................................................................................. 11 10.0 Testing and Commissioning at site............................................................................... 12 11.0 Vendor Documentation................................................................................................. 13 12.0 Statutory Approval ....................................................................................................... 13 13.0 Spares and Special Tools.............................................................................................. 13 14.0 Installation and Commissioning ................................................................................... 13 Appendix - A: Table of Compliance ........................................................................................14

    Appendix - B: Codes & Standards ..........................................................................................16

    Appendix -C: Requisition for Engineering Documents ..........................................................20

    Appendix - D: Specification for 33KV Switchgear.................................................................22

    Appendix - E: Specification for LV Switchgear......................................................................23

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    Appendix - F: Specification for DC System............................................................................24

    Appendix - G: Recommended List of approved vendors ........................................................25

    Appendix - H: Drawings & Single Line Diagrams..................................................................26

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    1.0 Introduction

    This specification covers the minimum requirements for the Design, Engineering, Supply & Material procurement, Fabrication, Assembly, Painting, Inspection at manufacturers works, Supply & Delivery to site, Testing and Commissioning of Major Electrical Equipment (33kV Switchgear, LV Switchgears, 110V D.C. UPS System) for Black Oil Terminal Project of M/s. HPCL located at Visakhapatnam, A.P., India. Following are the definitions: Owner/Purchaser M/s. Hindustan Petroleum Corporation Ltd. Consultant Mott MacDonald Consultants (India) Pvt. Ltd.[MMCI] Vendor Supplier of 33kV Switchgear, LV Switchgears & 110V

    D.C. System Shall This is to be understood as mandatory in relation to the

    requirements of this document. Should This is to be understood as a strong recommendation to

    comply with the requirements of this document. Equipment This is to be understood as vendor supplied equipment

    with all accessories.

    The Vendor shall ensure that the design complies with the requirements of this specification and standards. The Guaranteed Technical Particulars enclosed with related Equipment specification, which forms part of this specification, shall be completed by the Vendor. The Vendor shall highlight any non-compliance at the offer stage in the Table of Compliance, Appendix A. Not providing completed compliance table and Guaranteed Technical Particulars can cause rejection of the offer. Failure to clearly identify specific deviations shall be assumed by the Purchaser to be total compliance with the specification. This specification does not relieve the Vendor from final guarantee as to materials, apparatus, workmanship and performance of the equipment supplied.

    2.0 Location and Environmental Conditions

    2.1. Plant Location

    Black Oil Terminal Project is located at Visakhapatnam, A.P, India. 33kV & L.V. switchgears, 110V D.C. UPS & DCDB shall be located in Main Substation within the Plant Complex.

    2.2. Environmental Conditions Refer Doc No.: 254625-300-SP-GEN-001 for details.

    2.3. Electrical System Data Refer Doc No.: 254625-300-DS-ELE-001 for details.

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    3.0 Scope of Supply

    The following Equipment shall be supplied, in accordance with this specification; standards stated herein & enclosed appendices:

    3.1. Electrical Equipment;

    Sr. No. Item Description Unit Quantity Remarks

    1.

    Indoor type 33kV Main Switchgear with supporting base frames as per the following details, attached SOQ & 33kV Single Line Diagram. (APSEB 33kV Switchgear) Rated voltage 33 kV Highest system voltage 36 kV Rated Bus-bar current 630A Short time withstand current 25kA for 3 Sec. Single Breaker Panel (Refer Appendix-D & H)

    Set

    1

    2. Indoor type 33kV Main Switchgear panel (1-I/C + 2-Out-going feeders) with supporting base frame as per the following details, attached SOQ & 33kV Single Line Diagram (HPCL 33kV Switchgear) Rated voltage 33 kV Highest system voltage 36 kV Rated Bus-bar current 630A Short time withstand current 25kA for 3 Sec. Three Breaker Panel (1 I/C + 2 O/Gs) (Refer Appendix-D & H)

    Set

    1

    3.

    415V PMCC for Plant as per following details & attached SOQ & SLD including horizontal, vertical busbar arrangement and cable alleys: Rated Voltage : 415V Highest System Voltage : 433V Rated Busbar Current : 3200A Short Circuit Withstand Current : 50kA for 1 sec. (Refer Appendix-E & H)

    Set 1

    4. 415V PCC for Electrical Heat Tracing as per following details & attached SOQ & SLD including horizontal, vertical busbar arrangement and cable alleys: Rated Voltage : 415V Highest System Voltage : 433V Rated Busbar Current : 3200A Short Circuit Withstand Current : 50kA for 1 sec. (Refer Appendix-E & H)

    Set 1

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    Sr. No. Item Description Unit Quantity Remarks

    5. 415V Wagon Filling MCC as per following details & attached SOQ & SLD: Rated Voltage : 415V Highest System Voltage : 433V Rated Busbar Current : 1600A Short Circuit Withstand Current : 50kA for 1 sec (Refer Appendix-E & H)

    Set 1

    6. 415V Bunkering/Shipping MCC as per following details & attached SOQ & SLD: Rated Voltage : 415V Highest System Voltage : 433V Rated Busbar Current : 1600A Short Circuit Withstand Current : 50kA for 1 sec (Refer Appendix-E & H)

    Set 1

    7. 415V T/T Filling MCC as per following details & attached SOQ & SLD: Rated Voltage : 415V Highest System Voltage : 433V Rated Busbar Current : 1600A Short Circuit Withstand Current : 50kA for 1 sec

    (Refer Appendix-E & H)

    Set 1

    8. Breaker handling trolley (For L.V. Breakers) No. 2

    9. PLC Based Instrument Interface Panel-1 with Engineering Work Station & Ethernet Cubicle as per Interface Block Diagram

    No. 1

    10. PLC Based Instrument Interface Panel-2 No. 1

    11.

    Dummy Panel Dimensions shall be in line with respective 415V overall panel dimension and width of the dummy panel shall be approximately 700mm.

    No. 5

    12. 110V DC system (110V D.C. UPS & DCDB) with a) SMF (VRLA) battery complete with racks &

    accessories. b) One No. Float charger c) One No. Float cum Boost charger d) DCDB (Refer Appendix-F & H)

    Set 1

    Inspection and Testing as specified. Submission of documents as specified. Painting as specified.

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    Preparation of shipment and delivery to site. Spares for two years normal operation. Start-up spares and commissioning spares. List of special tools required (Vendor to provide list with the bid). Any other items, required to make system complete. Testing & Commissioning. Supply & laying of Communication cables and control cables (including termination

    material) between PLC based Instrument Interface panel to respective Electrical panel within the substation or MCC building. Refer Interface Block Diagram. Vendor to note that cable laying between main substation and MCC room-2 shall be underground in excavated trench. Vendor shall provide necessary protection bricks & sand on laid cables.

    3.2. Engineering Services The Vendor shall provide engineering services, which shall include, but not necessarily be limited to, the following:

    Providing/coordinating detailed design of all equipment and components within the scope of supply.

    Resolving engineering queries related to the equipment and components within the scope of supply.

    Performing all relevant calculations pertaining to the equipment and components within the scope of supply.

    Providing progress reports etc. Providing expediting services for all sub-vendors. Providing quality assurance, including all sub-vendors with respect to ISO 9000 or

    equivalent. Quality Assurance. Training of clients personnel at site / Vendors shop. Inspection Test Plan QA Plan FAT Procedure Manufacturing Schedule

    3.3. Exclusions

    Installation/Erection. Power Cables and associated termination material cable glands & lugs. Synchronising Panel Busduct Transformer

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    4.0 Codes and Standards 4.1. General

    The supplied Equipment shall meet the requirements of this specification and latest edition of applicable standards listed in enclosed Appendix-B.

    4.2. Conflicting Requirements

    In case of conflict between documents relating to the enquiry or purchase order, the following priority of documents shall apply. First priority : Purchase order and variations thereto Second priority : Data/requisition sheets and drawings Third priority : This engineering specification. Fourth priority : International standards.

    Note: Should any conflict arise either before or after order placement the Vendor shall immediately inform the Purchaser for technical resolution of the conflict.

    5.0 Design requirements 5.1. General

    5.1.1 The vendor shall offer a complete package comprising of 33kV Switchgear, LV Switchgears with soft starter & VFD, PLC Based Instrument Interface Panel, 110V DC System. Refer enclosed Specification and Single line diagram for details.

    5.1.2 All equipment shall be designed to operate satisfactorily under the ambient, environmental and power supply conditions as specified in Electrical System Data.

    5.1.3 All Switchgears, MCC Boards shall be capable of withstanding the maximum fault current that may arise, duly considering the maximum fault levels on high voltage system, negative tolerance on transformer impedance and maximum possible motor contribution for maximum possible fault clearing time on ultimate backup protection but not lower than one second in any case.

    5.2. 33kV Switchgear

    5.2.1 33kV Switchgear shall be designed to withstand the maximum fault current, voltage variation of 10%, 25kA for 3 seconds.

    5.2.2 Further details of the 33kV switchgear are mentioned in 33kV Switchgear specification. Spec. No.: 254625-300-SP-ELE 001 attached in Appendix-D.

    5.3. LV Switchgear

    5.3.1 LV Switchgear shall be designed to withstand the maximum fault current, voltage variation of 10%, and 50kA for 1second.

    5.3.2 LV switchgear shall comprise of PMCC, PCC, MCC with soft starters & VFD and separate PLC Based Instrument Interface Panel & Engineering Work Station.

    5.3.3 The vendor shall give a detail write-up with sketches, block diagrams, circuit diagrams to explain the principle of operation & salient features of Drive unit offered, along with the offer.

    5.3.4 Busduct (By others) shall be provided from transformer (By others) to PMCC / PCC incomer & for MCC incomers Cables shall be provided.

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    5.3.5 Further details of the LV switchgear are mentioned in LV Switchgear specification. Spec. No.: 254625-300-SP-ELE-003 attached in Appendix-E.

    5.4. DC system (Battery & Battery Charger System) 5.4.1 DC system shall be 110V and shall comprise of Battery, Battery charger & DCDB. 5.4.2 D.C. system sizing shall be carried out by vendor at offer stage based on D.C. requirement of

    offered 33kV switchgear, L.V. switchgear and Critical lighting requirements. 5.4.3 Battery Shall be Sealed Maintenance Free Valve Regulated Lead Acid (SMF-VRLA) type &

    Battery back up period shall be 2 Hrs.

    5.4.4 DC distribution board shall be integral part of DC UPS & provided to feed various loads. The provision of incoming and outgoing feeders on DC distribution boards shall be as specified in the enclosed SLD. However number of outgoing feeders & adequacy of component ratings shall be verified by vendor at offer stage.

    5.4.5 Further detail of the DC System are mentioned in Specification. No.: 254625-300-SP-ELE- 006 attached in Appendix-F.

    6.0 Name Plates

    6.1 Permanent non-corrosive nameplate with engraved white letters on black background indicating the switchgear designation shall be fixed at the top of the central panel.

    6.2 Name plates shall contain the following information: First line : Equipment Item No. Second line : Equipment Description Third line : Equipment Rating. Fourth Line : System voltage.

    6.3 The following information shall be inscribed on a non-destructive, corrosion-resistant, indelible name/rating plate attached to the inner side of the unit enclosure door:

    Purchaser's order number. Year of manufacture. Name of Manufacturer. Type and serial number of unit. Purchasers Equipment Number. Nominal input current and voltage (incl. nature of current & number of phases). Rated nominal output current and voltage. Nominal DC / battery voltage. Ingress protection degree.

    6.4 All terminals of equipment and components shall be identifiable by alphanumerical markings in accordance with the Manufacturer's drawings. Terminals of input and output supply cables shall be clearly and uniquely marked to indicate their purpose and the phase/polarity of the supply. All wires shall be marked according to the electrical diagrams with closed loop markers (ferrules) or stamped. Danger labels shall have black letters on a yellow background.

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    7.0 Makes Of Components

    Makes of components shall be as per Recommended sub-vendor list attached in tender document.

    8.0 Painting & Finishing:

    All metal surfaces shall be thoroughly cleaned and degreased, pickled and phosphatised. Thereafter, a coat of phosphate paint and a coat of zinc chromate primer shall be applied. After removing all imperfections, all metal surfaces shall be sprayed with two coats of final epoxy based paint as per colour shade Silver grey No. 628 (IS-5). All unpainted parts shall be plated to prevent corrosion.

    9.0 Inspection and Testing

    9.1 The responsibility for inspection, certification, etc. of all materials, parts lies with the Vendor. The Vendor shall specify all of the inspection and testing requirements in the quality plan which shall identify the activities requiring the Owners approval, review, witnessing etc. Inspection and testing requirements shall be in accordance with this specification, other All Equipment shall be inspected for compliances with:

    Requirement of Owners specification & correspondence therefore.

    Applicable codes, standards and specifications, which shall also include sub-referenced standards therein.

    Test and Inspection Plans produced by the vendor. Inspectors have the right to request additional inspections or tests to ensure that the equipment complies with the specification and all relevant codes & standards.

    9.2 Manufacturer shall furnish valid Type Test Certificates of similar models for all offered equipment along with the offer. Fresh type tests for the equipment are not needed, provided the Manufacturer can submit certificates that the equipment complies with all type tests as prescribed by IEC/IS Standard specifying the test requirements for that equipment.

    9.3 Routine tests on the equipment shall be carried out as per the relevant IS/IEC. Equipment offered for final inspection shall be complete and ready for shipment, with the possible exception of the final paint finish.

    9.4 Routine Test certificates to be submitted for Equipment and its all auxiliaries. Type test certificate of similar equipment shall be submitted.

    9.5 Vendor to furnish required copies of test certificates, Ref Documents, Drawings, and Instruction Manuals before Equipment are dispatched.

    9.6 Factory acceptance test (FAT) is required to be done at no extra cost to the purchaser. FAT procedure for every equipment shall be furnished. The purchaser or his representative shall be advised of the tentative date for FAT at least 3 weeks in advance prior to the test date.

    9.7 Any defects found by the TPI or the Owners appointed Inspector shall be rectified in his presence. Where this is not possible or practical, check lists shall be prepared and signed by the Third Party Inspector stating all pending items. Copies of these lists shall be sent to the Owner to enable their subsequent checking. The equipment shall not leave the Vendor factory before all defects have been rectified and without the written permission of the Owner.

    9.8 All spare parts shall be subjected to the same inspection standards and full material certification as the main order.

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    9.9 The equipment shall not leave the Vendor / Sub-Vendors factory before all discovered defects have been rectified and without the written permission of the Owner/Purchaser.

    9.10 Any acceptance or release of equipment following an inspection or test activity shall in no way relieve the Vendor of his contractual responsibility to provide guarantees as to the suitability of the materials, workmanship and performance of the equipment in accordance with this Specification.

    9.11 Owner/Consultant reserves the right to waive the inspection at any stage. Inspection shall be carried out only on receipt of Vendor's internal test report of the equipment offered and scrutiny of the same. In the event, on receipt of inspection call, the Owner/Consultants representative reaches the Vendor's works and finds the material not ready for inspection/incomplete/has short supply, the inspector will return to his base station and all expenses incurred by the inspector including to and from travelling expenses from his base station to place of inspection, boarding and lodging etc shall be reimbursed by Vendor.

    10.0 Testing and Commissioning at site

    10.1 The responsibility of testing, commissioning and functional testing of equipment lies with vendor.

    10.2 Vendor shall perform the following minimum tests at site for respective major electrical equipment.

    I 33kV Switchgear: a Insulation resistance test.

    b Power frequency high voltage test if directed by Owner / MMCI. c C.T. Polarity test & ratio test. d Relay operation test by primary & secondary injection method. e Functional check of the control circuit.

    f Checking of all relay setting. g ON / OFF Operation of the breakers both manually & electrically in test as well as service

    position.

    II L.V. Switchgear: a Insulation resistance test.

    b Relay operation test by secondary injection method. c Functional test of the control circuit.

    d Checking of setting of all relays / release. e ON / OFF Operation of breaker both manually & electrically in test as well as service positions. f All outgoing feeder functional test. g Interface PLC Panel functional and simulation test with TAS as well as from PLC Panel in

    totality. Co-ordination with TAS vendor while pre-commissioning activity. III D.C. UPS System a Insulation Test.

    b Functional Test of D.C. UPS & Battery.

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    11.0 Vendor Documentation

    11.1 All information listed below is to be furnished along with the offer as a minimum. (a) Clause wise comments / deviations on specification in `Table of Compliance [enclosed

    Appendix A]. If not furnished, compliance to all requirements in specifications will be binding on the Vendor.

    (b) Duly filled up Guaranteed Technical Particulars. (c) Type test certificates. (d) Technical Catalogues. (e) List of clientele for similar equipment in last 5 years. (f) Documents as per Requisition for Engineering Documents (RED). (g) General arrangement drawing (including sectional drawing) showing dimensions, weight,

    foundation details, floor cutouts and cable entry details of all the equipment. 11.2 The Manufacturer shall furnish the drawings and documents as per enclosed Requisition for

    Engineering Documents - RED Form [Appendix-C]. 11.3 The Owner/Consultant will review drawings submitted by Vendor & return to the Vendor one

    copy of drawings with comments to carry out necessary changes, if any, during the engineering / manufacturing stage.

    11.4 The documents required by the Third Party Inspection Agency are not covered under this specification. The Vendor shall provide all the drawings and documents required by the Third Party Inspection agency in compliance with the applicable codes and standards.

    12.0 Statutory Approval

    The Major Electrical Equipment supplied shall be acceptable to local Electrical Inspectorate and Statutory bodies. Changes required, if any, shall be carried out by the vendor without any extra cost.

    13.0 Spares and Special Tools

    13.1 Spares The Vendor shall include all necessary spares for testing, pre-commissioning, commissioning.

    In addition to above, Vendor to provide spares for two years normal operation.

    13.2 Special tools The Vendor shall supply a set of any special tools, which are required for the commissioning, operation and maintenance of the equipment being supplied. A list of special tools shall be furnished along with the offer.

    14.0 Installation and Commissioning

    Vendor shall dispatch Installation instructions at least 2 weeks before the arrival of the equipment. Vendor shall offer qualified personnel from the Manufacturer to carryout site testing and commissioning of all equipment supplied under this contract.

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    Appendix - A: Table of Compliance The Vendor shall confirm that clauses of the specification have been complied with/accepted or further clarifications are desired, or Vendor has taken a deviation with reason thereto.

    CLIENT : M/s. Hindustan Petroleum Corporation Ltd. Black Oil Terminal Project

    VENDOR REF.

    Spec. Clause No.

    Conforms Yes/No

    Alternative Yes/No Clarification

    1

    2

    2.1

    2.2

    2.3

    3

    3.1

    3.2

    3.3

    4

    4.1

    4.2

    5

    5.1

    5.2

    5.3

    5.4

    6

    7

    8

    9

    10

    11

    12

    13

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    CLIENT : M/s. Hindustan Petroleum Corporation Ltd. Black Oil Terminal Project

    VENDOR REF.

    Spec. Clause No.

    Conforms Yes/No

    Alternative Yes/No Clarification

    14

    Appendix A:

    Appendix B:

    Appendix C:

    Appendix D:

    Appendix E:

    Appendix F:

    Appendix G:

    Appendix H:

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    Appendix - B: Codes & Standards

    HV & LV Switchgear IS 13118 : 1991 Reaffirmed 2002

    : High Voltage alternating current Circuit Breaker.

    IS 12729 : 2004 : Common Specification for High-Voltage Switchgear and Controlgear Standards

    IS 3427 : 1997 Reaffirmed 2002

    : A.C. Metal Enclosed Switchgear and Controlgear for Rated Voltages Above 1 kV and Up to and Including 52 kV

    IS 9921 Part 1 : 1981 Reaffirmed 2002

    : Specification for Alternating Current Disconnectors (Isolators) and Earthing Switches for Voltages Above 1 000 V - Part I : General and Definitions

    IS-9046 : 1978 Reaffirmed 2002

    : AC contactors of voltage above 1000 V upto and including 11000 V.

    IS-6875 Part 2 : 1973 Reaffirmed 1992

    : Control switches (switching devices for control and auxiliary circuits including contactors relays) for voltages upto and including 1000V AC and 1200V DC - Push Button and related control switches.

    IS-3231 : 1986 Reaffirmed 1997

    : Electrical relays for power systems protection: Part 0 General introduction

    IS-2705 Part 1 : 1992 Reaffirmed 2002 : Current Transformers : Part 1 General Requirements

    IS-2705 Part 2 : 1992 Reaffirmed 2002 : Current Transformers : Part 2 Measuring Current Transformers

    IS-2705 Part 3 : 1992 Reaffirmed 2002 : Current Transformers : Part 3 Protective Current Transformers

    IS-2705 Part 4 : 1992 Reaffirmed 2002 :

    Current Transformers : Part 4 Protective Current Transformers for special purpose

    IS 12021 : 1987 : Control Transformer

    IS-3156 Part-1 to 4 : 1992 Reaffirmed 2002 : Voltage Transformers.

    IS-5578 : 1984 Reaffirmed 2006 : Guide for marking of insulated conductors.

    IS 4691 : 1985 Reaffirmed 2004 : Degree of Protection provided by enclosures

    IS-11353 : 1985 Reaffirmed 2006

    : Guide for uniform system of marking and identification of conductors and apparatus terminals.

    IS-6005 : 1988 : Code of practice for phosphating of iron and steel.

    IS-4483 : 1968 Reaffirmed 2001

    : Preferred panel cut out dimensions for electrical relays - flush mounting IDMTL relays.

    IS 13234 : 1992 Reaffirmed 2002

    : Guide for Short-circuit Current Calculation in Three-phase A.C. Systems

    IS-1248 : 2003 : Direct acting indicating analogue electrical measuring instruments and their accessories

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    IS-2419 : 1979 Reaffirmed 2002

    : Dimensions for panel mounting indicating and recording electrical instruments

    IS-4146 : 1983 Reaffirmed 2001

    : Application guide for Voltage Transformers

    IS-4201 : 1983 Reaffirmed 2001

    : Application guide for Current Transformers

    IS-4237 : 1982 : General Requirements for Switchgear and Control Gear for Voltages not exceeding 1000V AC or 1200V DC

    IS-4794 : 1985 Reaffirmed 2001

    : Push Button Switches

    IS-5082 : 1998 Reaffirmed 2003

    : Wrought aluminium & aluminium alloy bars, rods, tubes and sections for electrical purposes.

    IS-6236 : 1971 Reaffirmed 2005

    : Direct recording electrical measuring instruments.

    IS 8623 : 1993 Reaffirmed 1998

    : Specification for Low-Voltage Switchgear and Controlgear Assemblies

    IS-13703 Part-1: 1993 Reaffirmed 2004

    : Low Voltage Fuses

    IS 10118 : 1982 Reaffirmed 2006

    : Code of Practice for Selection, Installation and Maintenance of Switchgear and Controlgear

    IS-11353 : 1985 Reaffirmed 2006

    : Guide for uniform system of marking and identification of conductors and apparatus terminals

    IS 13947 Part-1 : 1993 Reaffirmed 2004

    : Specification for Low-voltage Switchgear and Controlgear

    IS 13947 Part-2 : 1993 Reaffirmed 2004

    : Specification for Low-voltage Switchgear and Controlgear Part 2 : Circuit Breakers

    IS 13947 Part-3 : 1993 Reaffirmed 2004

    : Specification for Low-voltage Switchgear and Controlgear Part 3 : Switches, Disconnectors, Switch Disconnectors and Fuse Combination Units

    IS 13947 Part-4 : 1993 Reaffirmed 2004

    : Specification for Low-voltage Switchgear and Controlgear Part 4 : Contactors and Motor-Starters Section 1: Electromechanical Contactors and Motor Starters

    IS 13947 Part-5 (Section1) : 1993

    : Specification for Low-voltage Switchgear and Controlgear Part 5 : Control Circuit Devices and Switching Elements Section 1 : Electromechanical Control Circuit Devices

    IS 3043 : 1987 : Earthing

    IEC 60947 : 2007 : Low Voltage Switchgear & Controlgear- Part 1 - General rules

    IEC 60255 : Electrical Relays

    IEC 61850 : Numerical Relays

    IEC 62271-1 : 2008 : Common Specifications for High Voltage Switchgear and Control Gear Standards

    IEC 62271-200 : 2003 : AC Metal enclosed Switchgear and Control Gear for Rated Voltage 1kV and including 52kV

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    IEC 62271-100 : 2007 : High Voltage Circuit Breakers.

    IEC 60038 : 2003 : IEC standard Voltages

    IEC 60059 : 2009 : IEC standard current ratings

    IEEE C37.21 : 2005 : IEEE Standards for Control Switchboards

    IEC 60439 : 2004 : Low voltage switchgear and control gear Assemblies Part 1: Type-tested and partially type-tested assemblies.

    IEEE 519 : 2004 : Recommended Practices & Requirements for Hazardous Control in Electrical Power Systems

    DC UPS : Battery, Battery Charger & DCDB system

    IEC 60086 : 2006 : Batteries-General

    IEC 60896 Part-2 : 1995 : General requirement & method of tests for Valve regulated type batteries

    BS 6290 Part-4 : 2007 : Specification for sealed Valve regulated Lead acid batteries

    BS 6745 Part-1 : 1986 : Specification for performance, design and construction of valve regulated sealed type batteries

    IS 14901 Part-1 : 2001 : Essential Ratings and Characteristics of Semi-Conductor Devices.

    IS 14901 Part-7 : 1970 Reaffirmed 2006

    : Essential Ratings and Characteristics of Semi-Conductor Devices Part-VII : Reverse Blocking Triode Thyristors

    IS 14901 Part 1, 3 & 7 : Letter Symbols for Semi-Conductor Devices.

    IS 3715 Part-4 : Letter Symbols for Semi-Conductor Devices : Part-IV - Thyristors.

    IS 13947 Part-3 : 1993 Reaffirmed 1998

    : Specification for Low-voltage Switchgear and Controlgear Part 3 : Switches, Disconnectors, Switch Disconnectors and Fuse Combination Units.

    IS 13947 : 1993 Reaffirmed 2004

    : Specification for Low-voltage Switchgear and Controlgear - Part 1 : General Rules

    IS 1248 : 2003 : Direct Acting Indicating Analogue Electrical Measuring Instruments and their Accessories

    IS 13947 Part 1 : 1993 Reaffirmed 2004

    : Degrees of protection provided by enclosures

    IS- 3231 : 1986 Reaffirmed 1997

    : Electrical Relays

    Is 8623 : 1993 Reaffirmed 1998

    : Factory built assemblies.

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    IS- 13947 Part 4Section 4: 1993 Reaffirmed 2004

    : Specification for Low Voltage Switchgear and Controlgear Part 4 : Contactors and Motor Starters.

    IS- 13947 Part 3 : 1993 Reaffirmed 2004

    : Control Switches and Push Button Stations

    IS- 4540 : 1968 Reaffirmed 2001

    : Semiconductor rectifier cells and stacks mono crystalline.

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    Appendix -C: Requisition for Engineering Documents RED Form Owners Office Distribution Office

    M/s. Hindustan Petroleum Corporation Ltd. Viskaha Dispatch Station VR-ATP Area, Naval Base Post

    Visakhapatnam 530 014

    Mott MacDonald Consultants(I) Pvt. Ltd Kothari House, CTS No. 185 Off Andheri Kurla Road Andheri ( East), Mumbai 400059, India

    SPECIAL INSTRUCTIONS Prints Documents shall be sent to: Production Schedule 5 The Purchasing Office via courier service Manufacturing, inspection & testing sequence plan 5 The Purchasing Office via courier service DRAWINGS Required number for TIMING FOR SUBMITTAL

    OFFER APPROVAL FINAL - for approval 2 weeks after order date

    Approval drawings / Final drawings to be submitted under cover of an ADS form / FDS form respectively

    Prints Prints Disk Prints - final issue 2 weeks after approval date Documents shall be submitted to:

    Submission of Following not limited to: 33kV Switchgear, LV Switchgear, Interface PLC: Guaranteed Technical Particulars with values filled up 2 5 2 10 General Arrangement Drawing showing masses, Main dimensions, arrangement of auxiliary components, sectional details etc.

    2 5 2 10

    Name Plate Drawing - 5 2 10 Foundation Plan & Loading Details, Baseframe details, floor cut-outs for Switchgears

    2 5 2 10

    Block Logic, Control Schematics, Soft starter, VFD Schematics, Interface PLC block diagram & Schematics & Connection diagrams

    - 5 2 10

    Busbar sizing Calculation, Termination diagram - 5 2 10 Bill of Material - 5 2 10 Single Line Diagram, feeder List 2 5 2 10 Make of Each Component, List of Makes 2 5 2 10 As built Drawings - 5 2 10

    Purchasing Office via courier service

    Battery, Battery Charger & DCDB system Guaranteed Technical Particulars with values filled up 2 5 2 10 Brief Write up on D.C. System operation, List of Alarms / Annunciation

    - 5 2 10

    General Arrangement Drawing showing plan, elevation & typical section views, Particularly typical sections, to illustrate cable connections.

    2 5 2 10

    Foundation Loading Plan showing fixing channels, Floor openings etc. and max. depth/weight/shock loading on foundation of panel

    2 5 2 10

    Bill of Materials for each equipment, D.C. System Block Diagram

    - 5 2 10

    Main & Control Circuit Schematic Diagrams / Wiring diagrams

    - 5 2 10

    Make of Each Components 2 5 2 10

    Purchasing Office via courier service

    SLD for DCDB, Battery drawings 2 5 2 10

    Calculations: Battery Sizing Calculation Float Charger Sizing Calculation Float Cum Boost Charger Sizing Calculation

    2 5 2 10 Purchasing Office via courier service

    Backup documents/Graphs for calculations

    Name Plate Drawing - 5 2 10

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    Following documents to be submitted for supplied equipment within the Major Electrical Equipment package

    Type Test, Routine Test Certificates 2 5 2 10 Operating manuals, incorporating installation, commissioning, operating & maintenance instructions and fault finding procedures

    5 2 10

    Spares List for two Years Operation 2 5 2 10 As Built Drawing 5 2 10 SPARE PARTS DOCUMENTS 1 10 ESPIR forms including 1 transparency

    Purchasing Office via courier service

    TEST AND INSPECTION DOCUMENTS Prints Documents to be submitted under transmittal Documents shall be submitted to: Manufacturing report 2 10

    Test Report / Data Curves, Inspection Test Plan, QA Plan 2 10

    Inspection Test Plan 2 10

    QA Plan 2 10

    FAT Procedure 2 10

    Calibration Certificates for testing Instruments. 2 10 Purchasing Office via courier service within 4 weeks

    Bought out Equipments Certificates. 2 10 Of relevant test / inspection. OPERATING DOCUMENTS Purchasing Office via courier service not later

    than time of Dispatch of equipment. Installation instructions 2 10

    Operating instructions 2 10 Combine into one manual Maintenance instructions 2 10

    ADDITIONAL REQUIREMENTS 1. Referenced standards / codes shall be the latest issue unless otherwise stated. REMARKS Invoice must certify that the drawings and engineering documents specified above have been dispatched to all parties concerned. Any deviation from the timing for submittal of documents shall be notified to the Approval / Distribution Offices by fax or E mail. Shop fabrication shall not be started before the required approval drawings have been released for construction by the party concerned, unless otherwise stated on the "Approval Drawing Specification". Each document shall bear the item / tag and order reference number and be dispatched by air mail, unless other instructions are stated on the RED.

    Units / dimensions to be used on Engineering documents shall be SI. The documents shall be in English. Description on drawings and similar documents may be in other languages provided English translations are also given. Drawings and documents shall be suitable for microfilming and comply with accepted national or international standards for the preparation of technical drawings. Only the following standard sizes should be used: A4, A3, A2, and A1.

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    Appendix - D: Specification for 33KV Switchgear Refer Doc. No: 254625-300-SP-ELE-001 (Pages 1 to 15)

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    APPENDIX - D

    SPECIFICATION FOR 33kV

    SWITCHGEAR

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    List of Contents Pages

    1 Scope .................................................................................................................................. 3 2 Technical Specification ...................................................................................................... 3 2.1 Construction ....................................................................................................................... 3 2.2 Busbars ............................................................................................................................... 5 2.3 Circuit Breaker ................................................................................................................... 5 2.4 Relays ................................................................................................................................. 7 2.5 Measuring Instruments (Digital Multifunction Meter) & Analog Meters.......................... 7 2.6 Current Transformers ......................................................................................................... 8 2.7 Potential Transformers ....................................................................................................... 9 2.8 Control Supply ................................................................................................................... 9 2.9 Control Switches .............................................................................................................. 10 2.10 Control Fuses.................................................................................................................... 10 2.11 Push Buttons..................................................................................................................... 10 2.12 Indicating Lamps .............................................................................................................. 10 2.13 Space Heaters, Illumination and Socket........................................................................... 11 2.14 Common Alarm Scheme .................................................................................................. 11 2.15 Wiring and Identification ................................................................................................. 11 2.16 Earthing ............................................................................................................................ 12 2.17 Cable Termination............................................................................................................ 12 2.18 Interface Requirement ...................................................................................................... 13 Attachment-1: Table of Compliance ............................................................................................ 14

    Attachment-2: Guaranteed Technical Particulars......................................................................... 15

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    1 Scope 1.1 This specification intended to cover Design, Engineering, Manufacturing, Assembly, Painting,

    Inspection, Testing at manufacturers works, supply & Delivery to site inclusive of packing & transportation, testing and commissioning at site of 33kV switchgear as per single line diagram and enclosed in appendices.

    1.2 This specification shall be read in conjunction with Specification for Major Electrical Equipments. [Specification no: 254625-300-RQ-ELE-001]

    1.3 Quantity of switchboard is as indicated in Main Specification No.: 254625-300-RQ-ELE-001 i.e. Specification for Major Electrical Equipments.

    1.4 The scope of work also includes testing and commissioning of the equipment supplied. 1.5 All equipment supplied shall be new and best of their respective kinds and shall be of the class

    most suitable for the purpose for which they are intended. 1.6 Modification of schemes/changes in components, if any suggested during scrutiny/approval of

    drawings and execution of work, shall be carried out by successful contractor at no extra cost. 1.7 The scope of Contractor includes all associated items / sensors / interlocks required for smooth

    and efficient working of system and required during installation, testing & commissioning. All such items are deemed to have been included in the contractors scope.

    1.8 Safety interlocks, necessary to ensure maintenance operation shall be provided.

    2 Technical Specification

    2.1 Construction The general constructional features of 33kV Switchgear shall incorporate the following as a minimum:

    2.1.1 The switchboard shall be metal enclosed, fully drawout, free standing, dust and vermin proof, totally enclosed, fully compartmentalised, floor mounted type. The circuit breaker panels shall be drawout, multi-compartmental unit type with min. IP-4X degree of protection. The unit shall be robust design to withstand the stresses encountered in the event of an electrical fault.

    2.1.2 Adequate lifting facilities such as hooks for ease of handling at site shall be provided. These hooks when removed shall not leave any openings in the switchgear.

    2.1.3 Front / Rear access shall be available to all components in cubicle which requires adjustment, maintenance or replacement.

    2.1.4 Rear access shall be available to all cable boxes and glands and multi-core terminal blocks. Rear side of cable chamber shall be provided with shrouds/segregation plates of non-flammable material, with high voltage danger notice board. It shall be possible to remove & install these shrouds/segregation plates after cables have been terminated.

    2.1.5 The individual panels shall comprise two main portions, i.e. the fixed and the moving portion. Fixed portion shall house busbars, current transformers, relays and instruments. Moving portion shall be circuit breaker. The busbar chamber shall be completely segregated from the rest of the panel. The busbars shall be suitably sized and supported on insulators of suitable grade and shall be brazed to withstand the fault level specified. The connection between the busbars and the terminals of the circuit breakers shall be suitably shrouded. Similarly, all Busbar joints shall be shrouded.

    2.1.6 Each unit of switchgear shall have necessary interior sheet metal barriers to form separate compartments for buses, switching devices, entering cable connections, etc. Each compartment

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    must be constructed and segregated to confine the damage caused by an internal fault to that compartment.

    2.1.7 Automatic safety shutters shall be provided to shroud bus side and cable side main disconnecting contacts of the circuit breaker when the circuit breaker is taken to test position. The shutters shall have Caution Label.

    2.1.8 In addition, caution board shall be provided on the vertical face separating circuit breaker compartment with other compartments. Current transformer shall be provided on the cable side of circuit breaker.

    2.1.9 The instrument / control chamber shall incorporate the indicating instruments, lamps and components of the control circuit. The instrument chamber shall be provided with a separate door which can be opened when the circuit breaker is ON. The instrument chamber shall also be totally segregated from the rest of the panel. Wherever equipments are mounted on the door, the wiring shall be with flexible wires. The wires shall be neatly bunched and clamped and shall be sufficiently long so that the door can be opened without causing unnecessary stress on the terminations at the instruments. All instrument and relays belonging to one panel shall be mounted on the same panel. In case of shortage of space, rear instrument panel above cable chamber can be utilised.

    2.1.10 All barriers shall be of non inflammable material. 2.1.11 Doors of all switchgears shall be gasketed to prevent entry of vermin and dust. No opening

    should be left. Steel screws, bolts and washers shall be plated. 2.1.12 Adequate packaging against damage / deterioration shall be provided for transportation to site

    and subsequent storage prior to reassembly. Each panel after packing shall be identified with details of panel by indelible ink.

    2.1.13 Vendor shall take necessary measures to comply internal arc classification as per IEC 62271-200.

    2.1.14 The height of the panel throughout the length shall be uniform. 2.1.15 Cable compartment

    This compartment shall be accessible from the rear of the cubicle and designed to accommodate the following equipment:

    Current Transformers.

    Voltage Transformers.

    Earth Switch.

    Cable-end Boxes. Cable box shall be suitable for the cable sizes as mentioned in the enclosed SLD.

    The normal arrangement of the cubicle shall be for cable entry from below the cable boxes being fitted at floor level.

    2.1.16 Low Voltage Compartment In order to accommodate the protection relays, control and indicating equipment a separate compartment in the upper part of the cubicle front shall be provided. All indicating equipment such as relays, ammeters etc. shall be mounted on the front door. Auxiliary relays, fuses, CT terminals, MCBs etc. shall be mounted and wired in the LV compartment.

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    Auxiliary contactors / relays / terminals shall be suitable for mounting on DIN rail. Separate terminal blocks shall be considered for Closing signals, Tripping Signals, Auxiliary Contacts, mA Signals (if any) etc.

    2.1.17 Base Frame Switchgears shall be provided with integral base frame which shall be bolted/welded on the cross members provided by owner. Base channel of height 75mm shall be provided. Amply dimensioned oblong holes shall be provided on the base frame. The base frame shall be of standard sections, re-rolled sections will not be acceptable. Vendor shall give base frame details in foundation drawing. Foundation on which base frame is mounted is excluded from Vendors Scope of supply. Vendor shall provide the dummy panel wherever the floor beam fouls with cable entry. Requirement of Dummy panel will be confirmed later. Vendor shall provide the Unit Rate of dummy panel.

    2.2 Busbars 2.2.1 All busbars and their main current carrying connections shall have the same sectional area

    throughout their length, Busbars shall be sized to continuously carry the rated current without exceeding the final temperature of 95C and the same shall be capable of withstanding the full fault level without any deformation. The continuous current rating of busbars shall be as per Single Line Diagram. Busbars shall be of Aluminium with proper plating at joints. The busbars shall be provided with cast epoxy sleeving or nylon film of suitable insulation class throughout their lengths and vertical droppers and colour coded. Joints in busbars shall be provided with shrouds. For long busbars, suitable expansion joints shall be provided.

    2.2.2 The busbars shall be supported by epoxy resin cast insulators with suitable Creepage distance & capable to withstand the specified fault level. The clearance between live parts and the earth shall be as per the IS.

    2.2.3 Busbars and connections shall be secured in such a manner that the insulators are not subjected to bending forces under short circuit conditions. Dynamic stresses shall be calculated on the basis of peak short circuit current.

    2.2.4 The vertical droppers shall be sized to carry continuously at least the rated current of the connected circuit breaker.

    2.2.5 Thermal design of the busbars shall be based on installation of the switchgear in poorly ventilated conditions. The cooling air volume shall take into account only the bus enclosure.

    2.3 Circuit Breaker 2.3.1 Circuit breaker shall be VCB/SF6 type & shall be triple pole arranged for motor operated spring

    charged, independent closing and shunt tripping from suitable voltage from battery. The close / trip control switch shall be interlocked to trip before close. The closing and tripping circuits shall be self-opening on completion of their respective functions irrespective of the position of the control switch.

    2.3.2 Mechanical OFF push actuators shall be provided on breaker mechanism door. This shall be operable without the need to open panel door.

    2.3.3 All operating mechanism shall be designed to give trouble free service over extended periods and shall not require attention more often than every 1000 operations or once a year, whichever is the shorter period. Each breaker shall be fitted with operation counter reading at least up to 999 figures.

    2.3.4 A visual ON / OFF indicator shall be provided positively coupled to the operating mechanism. This indicator shall be visible through a glass window from the front with the cubicle door closed.

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    2.3.5 The circuit breaker shall have facility to charge the spring manually and close the breaker in the event of failure of motor / control supply to motor. The spring charging motor shall start after closing of breaker and not after opening of breaker. In case the limit switch fails to cut out the spring charging motor when the springs are fully charged, the motor shall be automatically de-coupled and annunciation for this shall be provided. Mechanical indication for spring charged / discharged shall be provided.

    2.3.6 SF6 breaker shall be provided with the gas density monitoring device and necessary interlock alarm facilities.

    2.3.7 Manual closing devices shall also be provided. 2.3.8 Mechanism shall be trip free and shall have antipumping facilities. 2.3.9 Each circuit breaker shall have necessary auxiliary contacts for indication, protection,

    interlocking supervision, metering and other purposes. Minimum 4 NO + 4 NC shall be provided for owner's exclusive use. All spare contacts shall be wired up to the terminal blocks. All contacts shall be positively operated by main apparatus and all contacts shall be adequate to make, carry and interrupt the currents in their circuits. Auxiliary relay shall be used to multiply contacts. Service position contact of circuit breaker shall be used for the multiplying relay. The shunt trip of the circuit breaker shall be wired through an advanced `NO' contact which shall make before the main contact close.

    2.3.10 Mechanical / Electrical interlocks shall be provided to prevent mal-operation and in particular to ensure the following. All these interlocks shall be ensured irrespective of type of switchgear viz. SF6, VCB or VC. (a) The breaker can be operated only if it is in service or in test position. (b) Movement of the circuit breaker truck from service to test or test to isolated position OR

    in reverse order shall be possible only when circuit breaker is off. (c) In the operating positions of the breaker, the circuit breaker shall be securely locked. It

    can be withdrawn or inserted only with appropriate operations of the interlocking levers. (d) The operating lever facilitates to overcome the contact pressure at the main

    disconnecting contacts while pushing in or drawing out. (e) Test to isolated position of circuit breaker can be achieved only when the control plug is

    removed. (f) Isolated to test position of circuit breaker can be achieved only after inserting control

    plug.

    (g) It shall not be possible to withdraw the breaker when it is in closed position. (h) It shall not be possible to plug in a breaker with earthing switch closed. (i) It shall not be possible to close the earthing switch with breaker plugged in. (j) For Grid Incomer Circuit Breakers, it shall not be possible to close the earthing switch

    with upstream GOD (Group operating device/Isolator) in close position. (k) Pulling out of auxiliary circuit plug with breaker in service position shall not be

    possible. (l) Pushing in breaker to service position with auxiliary circuit plug not in position shall not

    be possible. (m) Opening of compartment door with isolating switch in ON position and vice versa shall

    not be possible.

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    2.3.11 Breaker operating duty shall be O-0.3sec-CO-3min-CO. Breakers shall be suitable for auto reacceleration / reclosure duty.

    2.3.12 All the non-conducting metal parts of the circuit breaker truck shall be bonded together and shall make perfect electrical connections to earth through substantial sliding contacts, at service and test positions. Such sliding contacts shall be arranged to make before power plug-in and interrupt after power drawout.

    2.3.13 Arc extinguishing devices shall be easily removable for routine inspection of fixed contact assemblies.

    2.3.14 The mating contacts of the circuit breaker with busbar contact shall be provided with removable shrouds.

    2.4 Relays 2.4.1 All relays shall be microprocessor based, Numerical Protection relays with communication

    facility.

    2.4.2 All relays specified shall be flush mounted in dust proof cases and shall match the appearance of the instruments mounted on the same panel. Relay covers shall be of non-ignitable materials.

    2.4.3 Breaker auxiliary contacts shall be wired up to numerical relay for status record. 2.4.4 Protective relays shall be withdrawable type. Trip circuits shall be automatically broken and

    current transformer secondary circuits shorted, when a relay is withdrawn from its case. A marking strip shall be provided in front of each terminal block and a diagram plate at the back of each case to identify connections.

    2.4.5 Relay contacts shall withstand repeated operation and shall make or break the maximum currents in their circuits without deterioration. All spare contacts shall also be wired up to the external terminals.

    2.4.6 Relay coils shall carry their normal currents indefinitely and such currents as can occur under fault conditions. Relay mechanisms shall not be affected by vibration or magnetic fields, which may occur in normal operation.

    2.4.7 Auxiliary relays in tripping circuits shall have mechanically operated flag indications and shall be hand reset type. Indicators shall be capable of being reset without opening the relay case. It shall not be possible to operate any relay by hand or to alter its setting, without opening the case. For relays with combined functions such as inverse time and instantaneous trip, separate indications of each function as specified shall be provided.

    2.4.8 Master tripping relay (lock-out relays) shall be of the hand / electrical reset type with self coil cut off contacts and shall have at least 2 NO + 2 NC spare contacts for owners exclusive use. Necessary multiplication by auxiliary relay shall be done.

    2.4.9 Provision shall be made for insertion of test plug at the front for testing and calibration using external source of power without disconnecting permanent wiring. Test plugs shall permit the shorting of any current transformer circuits.

    2.4.10 Auxiliary relays on which the function of a contact may be changed from NO to NC and vice-versa by simply changing the contact arrangement are preferred.

    2.5 Measuring Instruments (Digital Multifunction Meter) & Analog Meters 2.5.1 All measuring and recording instruments shall be digital, flush mounting type, with

    communication facility.

    2.5.2 Digital metering unit shall be provided for incoming & outgoing feeders as per SLD. The digital metering unit shall have provision to display the following :

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    Phase and line voltage

    Phase currents

    kVA, kW, kVAR, kVARH, kVAH and kWH

    Power factor

    Frequency, Total harmonics

    Alarm output relay

    2.5.3 3 Phase analogue ammeter shall be provided for feeders and voltmeters shall be provided in PT panels, as per SLD.

    2.5.4 All auxiliary equipment such as shunts, transducers, CTs and PTs that are required shall be included in the scope of supply.

    2.5.5 All indicating instruments and meters shall be capable of carrying continuously their full load currents and full voltage across their voltage coils. They shall not be damaged by the passage of fault currents or the existence of over voltage on the primary side of their instrument transformers for the maximum permitted duration of fault conditions which may occur during normal operation. All instruments and meters shall be back connected. Meters shall be provided with zero adjusting devices for external operation.

    2.5.6 Indicating instruments shall be of 96sqmm type flush mounted having 90 full scale movement. 2.5.7 Class of accuracy shall be 1 and 1.5 for Ammeter and Voltmeter respectively.

    2.6 Current Transformers 2.6.1 Current transformers shall be cast resin bar primary type with the secondary terminals housed in

    a terminal box. The burden, ratio and class of accuracy shall be as given in the SLD. However, current transformers shall have sufficient capacity to operate with the burden imposed by the devices shown on drawings within their accuracy classifications.

    2.6.2 Unless otherwise specified the CT shall meet following requirements : (a) Separate cores shall be used for metering and protection. (b) If a metering load is fed from a protection CT, suitable 1/1 or 5/5 ratio, saturated

    interposing CTs shall be used. 2.6.3 Current transformers shall be mounted in stationary part of switchgear. 2.6.4 These shall be capable of withstanding dynamic and thermal stresses originated by short circuit

    fault current for withstand time of the board. 2.6.5 Test terminal blocks shall be provided for each CT circuit. 2.6.6 CT terminal block shall be provided with shorting and disconnecting type links & terminals shall

    be suitable for termination of 4sq.mm cable. 2.6.7 Unless otherwise required for proper relaying one side of current transformer secondary shall be

    grounded in the compartment with the meters or relays which they serve and each current transformer group shall be grounded with a separate identified lead which may be disconnected for testing.

    2.6.8 CT secondary terminals shall be provided with plastic covers to prevent inadvertent contact. 2.6.9 CT circuits to have provision for remote metering in all the phases for all meters. 2.6.10 CT sizing shall be verified by vendor, based on relay make & relay manufacturers

    recommendation.

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    2.7 Potential Transformers 2.7.1 The PT's shall be epoxy cast resin type. The burden and ratio and class of accuracy shall be as

    specified in SLD. Generally, PT shall have specified accuracy class from 10% to 120% of normal voltage. However, potential transformers shall have sufficient capacity to operate with the burden imposed by the devices shown on the drawing with their accuracy classification.

    2.7.2 All PT's shall be drawout type and connections between the busbars and PT shall be completely shrouded. Automatic shutter shall be provided to shroud the busbars when PT is taken out.

    2.7.3 It shall be possible to remove potential transformer from the circuit breaker, whenever required. 2.7.4 HRC fuse protection shall be provided on primary. Secondary shall be provided with a 4 pole

    MCB. 2.7.5 Plug-in type test terminal blocks shall be provided for each PT circuit. 2.7.6 Unless otherwise specified for proper relaying one side of potential transformer secondary shall

    be grounded at the transformer and the ground connection shall be identified and removable for testing.

    2.7.7 The primary rated voltage shall be equal to the rated voltage Vn of the system or Vn/ 3 if the voltage transformer is connected between phase and neutral. If not otherwise specified secondary voltage shall be 110V or 110/ 3V.

    2.7.8 Line PT for each incomer shall be sized for 110V metering and protection requirement. 2.7.9 Selection and sizing of PT shall be verified by vendor based on relay make.

    2.8 Control Supply 2.8.1 Control supply for CB shall be 110V D.C. 2.8.2 110V DC control supply from Battery Charger shall be provided for tripping and closing circuits

    of circuit breakers. 240V AC control supply shall be provided for spring charging motor, auxiliary power and heater circuits. Vendor shall provide suitable control switch and fuse at the point of receiving control supply. Vendor shall be required to loop both these supply to all the panels forming one unit. Any other intermediate voltage required in the panel shall be derived by providing suitable control transformer.

    2.8.3 Control Circuits

    The equipment shall be designed in accordance with IS/IEC standard recommendations to operate with an over voltage up to 10% and under voltage up to 15% except for the tripping and closing circuits.

    The tripping circuit allows an operation with 70% to 110% of rated DC Auxiliary voltage supply; the closing circuit allows an operation with 85% to 110% of rated DC or AC Auxiliary voltage supply.

    For the protection of the different circuits such as control voltage supply charging motor, heater etc., where applicable MCBs shall be provided individually for each cubicle circuit.

    For receiving and distributing AC and DC power for control circuit suitably rated 2 pole MCBs to be considered.

    MCB Off indicating lamp to be considered in case of MCB (DC) is OFF 2.8.4 Two number control supply feeders shall be provided for each switchgear. Suitable control

    supply monitoring & selection scheme shall be developed by vendor.

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    2.8.5 Two number 240V AC supply feeder shall be provided for feeding space heaters, etc. Suitable AC control supply monitoring & selection scheme shall be developed by vendor.

    2.9 Control Switches 2.9.1 Each circuit breaker shall be provided with trip-neutral-close (T-N-C) control switch and local

    remote selector switch.

    2.9.2 All circuit breaker operating switches shall be of the pistol grip type, spring return to neutral and lockable in neutral position. They shall be arranged to close the breaker by being turned clockwise. The trip, neutral and close positions shall be clearly indicated. The movement shall be such that the switch cannot be operated inadvertently and that it is mechanically interlocked to trip before close. The operating switch shall be located on the centre line at about 1.5 meters from the floor level. Two spare ways shall be provided on these switches.

    2.9.3 Ammeter selector switches shall have `make` before break feature on its contacts. The selector switch shall generally have four positions for reading three phase currents and the neutral current.

    2.9.4 The voltmeter selector switch shall also have four positions. Three shall be used to measure phase to phase voltages and the fourth shall be OFF position.

    2.9.5 Based on operational philosophy, if required, Auto / Manual selector switch shall be provided.

    2.10 Control Fuses

    2.10.1 All control fuses shall be of link type. Screw type diazed fuses are not acceptable. Fuses shall generally be mounted on the upper half of the panel. All fuse links shall have HRC cartridges. Rewirable fuses are not acceptable. All fuses and links shall be provided with suitable label.

    2.11 Push Buttons

    2.11.1 Push button colours shall be as follows: Stop, Open, Emergency - Red Start-Close - Green Trip circuit `Healthy check' - Black

    Alarm Reset - Yellow

    Lamp Test - Green

    Red push buttons shall be on the left side and green push buttons on the right side.

    2.12 Indicating Lamps

    2.12.1 Indicating lamps shall be provided on breaker panel as per the SLD. The indicating lamps shall be of LED type having low voltage glow protection. The covers of the lamps shall be heat resistant.

    2.12.2 Indicating lamps colours shall be as follows:

    Running / ON - Red Stop / OFF - Green Fault / Auto Trip - Amber

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    Trip Coil Healthy - White Spring Charged - Blue Breaker in Service - Blue Control Power Healthy - White DC Failure - Red

    2.13 Space Heaters, Illumination and Socket 2.13.1 Panels shall be provided with 240V, 1 Phase AC supply power 2 pole MCB and shall have

    compact fluorescent light fitting for internal illuminating with door switch. 2.13.2 240V, 15A, SPN Industrial socket outlet, complete with MCB & earth-leakage protection shall

    be provided in each cubicle for hand lamp connection. 2.13.3 The cubicles shall be provided with space heaters to prevent moisture condensation and maintain

    cubicle temperature 5o C above the ambient. The space heaters shall be located at the bottom of the switchboards and shall be controlled through a thermostat with an adjustable setting, a manually operated switch. The thermostat shall preferably be located in the metering / relay chamber.

    2.14 Common Alarm Scheme 2.14.1 33kV Switchgear panel shall be provided with microprocessor based annunciator unit with

    Audio-visual alarm, & Test / Accept / Reset push buttons. 2.14.2 No. of windows of annunciator shall be decided based on number of alarm contacts to be wired

    with 20% spare windows. 2.14.3 Annunciator shall have facility for repeat annunciation at remote location.

    2.15 Wiring and Identification 2.15.1 All control signalling, protection and metering wiring shall be by PVC insulated, 660 Volt grade

    and copper stranded conductor wires of min. 1.5 Sq.mm. For CT secondary circuit wires of 2.5 Sq.mm copper conductor min. shall be used. Wiring shall run in enclosed channel and shall leave at least 25% spare space for future use. Wires for connection between moving parts shall be flexible stranded copper conductors and the same shall be soldered at the ends before connections are made.

    2.15.2 Terminal strips for connecting incoming control cables shall be channel mounted type of adequate size and shall be located conveniently for easy accessibility, without danger of contact with live part, ease of connection and shall be separated by barriers from power circuits. At least 20% spare terminals shall be provided in each terminal strips. CT secondary lead terminals shall be provided with shorting links.

    2.15.3 All spare contacts of auxiliary relays, timers etc. shall be wired up to terminals block. Terminal Block shall be 600V grade 10 Amps rated.

    2.15.4 Sufficient terminals shall be provided on each terminal strip to ensure that not more than one outgoing wire is connected per terminal. The wire shall be identified by numbered ferrules at each end, in accordance with the connection diagram. All ferrules shall be made of non-deteriorating materials. The ferrules shall be firmly located on each wire so that they cannot move or turn freely on the wire.

    2.15.5 All interpanel control wiring shall be done by the switchgear vendor. The interpanel wiring shall be taken through PVC sleeves or suitable rubber grommets. Multipin plug provided should have scraping earth terminal.

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    2.15.6 Each panel shall be provided with sufficient number of test terminal blocks and test plugs for testing relays and kWh refers. The control circuit shall be designed for power frequency withstand voltage of 2kV (SMS) for 1 minute.

    2.16 Earthing 2.16.1 Common earthing trolley shall be provided for all the circuit breakers. This shall be installed in

    cable compartment. Necessary interlocks between earthing trolley & circuit breaker shall be provided.

    2.16.2 An earth bus of at least 50 mm x 10 mm Aluminium shall be provided. The earth bus shall be electrically continuous and shall run the full extent of each board. The earth bus shall be of same material as the main busbars. Each unit shall be constructed to ensure satisfactory electrical continuity between all metal parts not intended to be live and the earth terminals of the unit.

    2.16.3 At each end of switchgear, suitable slots shall be provided on main earth bus for connection to Owner's Earth. The earth bus shall be accessible in each cable compartment either directly or through a branch extension to ground the cable armour and shields.

    2.16.4 All doors and movable parts shall be connected to the earth bus with flexible copper connections. All non-current carrying metallic parts of the equipment shall be earthed. Earth bus shall be brought back to cable compartment and earthing bolts shall be provided to ground cable armours.

    2.16.5 Circuit Breaker truck shall be provided with scrapping earth.

    2.17 Cable Termination 2.17.1 MV Cable

    (a) 33kV switchgear will be connected to transformers or other equipment by XLPE cables. All power and control cables shall enter the switchgear from bottom. Sufficient space and support arrangement shall be provided in the cubicles to accommodate cables. The number of cables per circuit sizes and types shall be as per SLD. If the required number of cable terminals cannot be accommodated in the circuit breaker chamber, adaptor panel at the rear with bus extension suitable for the number of cables to be terminated shall be provided.

    (b) The cable sockets shall be at such angle that the cable tails may be brought up for termination with minimum bending and setting.

    (c) Terminals shall be located sufficiently away from gland plates or cable boxes to facilitate easy connection. Minimum distance between gland plate and termination shall be 800 mm. If distance is not sufficient, adaptor panels shall be provided. Additional termination points shall be provided in the outgoing bus links for power factor correction capacitor cable termination.

    (d) Whenever extension box on Panels are provided, earth strip shall also be extended. In lieu of rear extension, a dummy panel may be provided for connecting cables.

    (e) The switchboard shall be supplied complete with supports for clamping outgoing and incoming cables. Terminal blocks shall not be used to support cables.

    2.17.2 Control Cables

    Control cables will enter the switchgear from the Bottom. Adequate space shall be provided for termination. Supporting facilities shall be provided for clamping the control cables.

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    2.18 Interface Requirement

    2.18.1 Alarm and indication signals to plant Instrument control system (TAS) shall be potential free contacts. These contacts shall be wired to terminals for external connections. The list of signals required for indications to TAS for each circuit breaker are as follows:

    Sr. No. Description

    Alarm (Contacts)

    Indication (Contacts) Remarks

    1 33kV Circuit Breaker-Open - 1 -

    2 33kV Circuit Breaker-Closed - 1 -

    3 33kV Circuit Breaker -Faulty 1 - -

    4 Incomer Faulty 1 - Under voltage relay operated

    2.18.2 All parameters from Multi function meter to TAS. 2.18.3 Additional 2 Nos. Auxiliary Contactors to be provided for Interlocks.

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    Attachment-1: Table of Compliance

    The Vendor shall confirm that clauses of the specification have been complied with/accepted or further clarifications are desired, or Vendor has taken a deviation with reason thereto.

    CLIENT : M/s. Hindustan Petroleum Corporation Ltd. Black Oil Terminal Project

    VENDOR REF.

    Spec. Clause No.

    Conforms Yes/No

    Alternative Yes/No Clarification

    1

    2

    2.1

    2.2

    2.3

    2.4

    2.5

    2.6

    2.7

    2.8

    2.9

    2.10

    2.11

    2.12

    2.13

    2.14

    2.15

    2.16

    2.17

    2.18

    Attachment 1:

    Attachment 2:

    Attachment 3:

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    Attachment-2: Guaranteed Technical Particulars

    [Doc. No. 254625-300-DS-ELE-002 [Sheets 1 to 4]

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    Guaranteed Technical Particulars (To be filled in by the Vendor)

    Note: Vendor shall submit guaranteed technical particulars separately for following 33kV switchgear:

    Item No. Description Specification

    1.0 General

    1.1 Manufacturer

    1.2 Country of Manufacturer

    1.3 Type reference

    1.4 Switchgear Designation

    1.5 Applicable Codes and Standards

    1.6 Installations

    1.7 Overall Dimensions & Maximum Weight

    1.8 IAC classification for switchgear [as per latest IEC 62271-200]

    1.9 Testing Authority

    1.10 Type test certificate furnished Yes/No

    2.0 Busbars

    2.1 Rated Voltage kV

    2.2 Rated current of main busbars at design Temp.of 500 C A

    2.3 Number of phases Nos.

    2.4 Short time withstand current for Busbars for 3 sec kA

    2.5 Material of Busbars

    2.6 Type of Busbars Sleeving

    2.7 Shrouds on joints Yes/No 2.8 Cross sectional area of busbars Sq.mm

    2.9 Maximum temperature rise over design temp

    2.10 Clearance in Air

    2.11 Location of Busbars 2.12 Earth busbar material & size

    3.0 Circuit Breakers

    3.1 Make & Type Designation

    3.2 Highest System Voltage kV

    3.3 No. of Poles

    3.4 Rated Frequency Hz

    3.5 Rated Current of circuit breaker A

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    3.6 Short time Withstand Current a) 1 s kA b) 3 s kA

    3.7 Peak Withstand Current kA 3.8 Power Frequency Withstand Voltage kV 3.9 Lightning Impulse Withstand Voltage kV

    a) Interrupting medium for circuit breaker b) Insulation medium for Switchgear

    3.10 Rated operating duty cycle of circuit breaker

    3.11 Opening time for Circuit breaker ms

    3.12 Independent hinged type lockable door provided for each cubicle

    Yes/No

    3.13 Rated short circuit breaking current for circuit breaker

    a) Symmetrical rms.kA b) DC Component %

    3.14 Rated short circuit making current (peak) kA 3.15 Total Closing / Opening time sec 3.16 Method of closing 3.17 Method of tripping 3.18 Is the breaker trip-free? Yes/No 3.19 Electrical antipumping feature provided Yes/No 3.20 Over voltages developed during current interruption

    a) Breaker b) Surge suppressors provided to limit over voltages Yes/No

    3.21 Maximum temperature rise over specified ambient temp. 3.22 Spring charge motor provided for CB Yes/No 3.23 Spring charging starts after breaker closing OR tripping 3.24 Time required to charge spring from fully discharged

    condition

    3.25 Control Supply voltage considered [Ref SLD] V 3.26 Power Consumption at Control Supply:

    a) Maximum tripping coil consumption / CB VA b) Maximum closing coil consumption