tdt gis 220 kv - antapacay 25580-220-3ps-esi1-00002

8/18/2019 TDT GIS 220 kV - Antapacay 25580-220-3PS-ESI1-00002

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BECHTEL Confidential © BECHTEL 2010 All rights reserved

BECHTEL CHILE LTDA.

TECHNICAL SPECIFICATION

25580-220-3PS-ESI1-00002

FOR

220 kV GAS INSULATED SWITCHGEAR (GIS).

FOR

ANTAPACCAY PROJECT – TINTAYA EXPANSION

0 16-Feb-10 Issued for Project Use RV RT EF BF CEZ

B 20-Nov-09 Issued for Approval EBV EVG EF BP CEZ

A 29-Oct-09 Issued for Coordination EBV EVG EF BP CEZ

REV DATE REASON FOR REVISION BY CHECK EGS PE PEM CLIENT

XSTRATA BECHTEL

ALLIANCE

JOB N° 25580

TECHNICAL SPECIFICATION N°

25580-220-3PS-ESI1-00002

REV

0

THIS DOCUMENT SUPERSEDES

25429-220-3PS-ESI1-10002-00B



Specification 220kV GIS Switchgear

25580-220-3PS-ESI1-00002-000


BECHTEL Confidential © BECHTEL 2010 All rights reserved of 24

TABLE OF CONTENTS

Section Title Page

1.0 GENERAL .......................................................................................................................... 3

2.0 CODES AND STANDARDS ........................................................................................... 3

3.0 GENERAL REQUIREMENTS......................................................................................... 4

4.0 DESIGN AND CONSTRUCTION REQUIREMENTS ................................................. 4

5.0 TESTING AND INSPECTION ...................................................................................... 16

6.0 TRAINING........................................................................................................................ 21

7.0 QUALITY CONTROL ..................................................................................................... 21

8.0 PACKING AND SHIPPING ........................................................................................... 21

9.0 SPARES........................................................................................................................... 22

APPENDICES

Appendix A International Standards




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1.0 GENERAL

1.1 This specification covers the design, manufacture and testing of metal-enclosed, GasInsulated Switchgear (GIS) in accordance with IEC standards for use in electricalsystems up to and including 245 kV.

1.2 The gas insulated switchgear and auxiliary equipment shall be the Seller's latestdesign, proven in service to meet the requirements and intent of this specification,the Material Requisition, and the attachments.

1.3 All components and materials shall be new, unused, and of current manufacture bygenerally recognized well-established firms in the industry. Replacement partsrequired for normal maintenance shall be readily available from stock.

1.4 All references to “data sheets” in the Material Requisition and this specification referto the Specification Data Sheets that are attached to the Material Requisition.

1.5 Each item of equipment shall be designed for shipment by truck, rail, and sea withoutregard to the location of its intended original installation.

2.0 CODES AND STANDARDS

2.1 The switchgear shall be designed, manufactured and tested in accordance with thelatest applicable sections of the IEC standards including those listed in Appendix A.

2.2 The Seller shall replace the word ‘should’ with the word ‘shall’ wherever it appears in

the referenced standards.

2.3 Any conflicts between the referenced documents shall be identified to the Buyer inwriting for resolution. In general the order of precedence shall be:

• Local Regulations and Codes

• Material Requisition/Purchase Order

• Data Sheets (where used)

• Single Line Diagram and schedules

• This Specification

• Referenced Standards

2.4 Compliance with the referenced standards does not relieve the Seller of responsibilityto supply switchgear and accessories of proper design, capable of fulfilling theoperational guarantees of the equipment at the stated service conditions, andcompliance with the established regulations and codes in effect at the point of use.

Any conflict between the standards, Data Sheets, and this specification shall bebrought to the attention of the Buyer.




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2.5 GIS equipment shall conform to the requirements and recommendations of IEEE Std.693 “Recommendations for the Seismic Design of Substations” and to the Projectspecific site conditions. The Seller shall certify that the equipment has beendesigned for the seismic service conditions specified in the Data Sheets.

3.0 GENERAL REQUIREMENTS

3.1 The switchgear described in this specification is intended for continuous duty at thespecified ratings under the specified ambient conditions 24 hours a day, 365 days ayear unless indicated otherwise.

3.2 The switchgear shall have a design life of at least 30 years. Design life shall includeavailability of spare parts for the product supplied.

3.3 The electrical arrangement of the switchgear, including protection, metering, control,interlocking (other than the manufacturer’s standard safety interlocking), and inter-tripping, shall be as shown on the single line diagram attached.

3.4 Equipment ratings shall be selected from the standards listed in Appendix A, and anyspecial requirements shall be indicated in the Data Sheets. The Manufacturer’sstandard designs and arrangements are preferred, subject to the approval of theBuyer.

4.0 DESIGN AND CONSTRUCTION REQUIREMENTS

4.1 Supporting structures for switchgear bays and termination modules associated withoverhead line, cable, or transformer connections shall be supplied by the Seller.Foundations and embedded steel for reinforcement and levelling will be supplied byothers.

4.2 Except for ends with transitions to other types of equipment, switchgear shall bearranged to permit future extension at both ends without drilling, cutting or welding onthe existing equipment. Addition of equipment shall not require the removal ordislocation of existing equipment bays.

4.3 Internal arcs shall be limited by subdividing the equipment into individual arc- and gas-

proof compartments that shall, as a minimum, include the following:• Bus bar(s) and

• Bus bar isolators

• Circuit breakers

• Line bushings, transformers, SF-6 bushing terminals and cable connections

• Voltage transformers




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4.4 Each gas compartment shall be equipped with a dedicated pressure relief rupturediaphragm and, where necessary, diverter nozzles shall be provided to divert apossible overpressure gas discharge away from the normal operating area of theswitchgear. Internal relief devices between adjacent compartments are notacceptable.

4.5 The switchgear enclosure must be capable of withstanding the thermal effects of aninternal arc at the full withstand rating of the equipment for the duration specified onthe Data Sheets.

4.6 Interlocks shall be provided to prevent incorrect or unsafe operation of the equipment.Interlock mechanisms shall be mechanical where possible and manual operators shallbe provided with labels that give clear instructions and are readily visible.

4.7 Switchgear shall be designed and constructed to facilitate inspection, cleaning, repairand maintenance and to ensure absolute safety during such work. The arrangement

of the switchgear shall provide adequate access and clearances around the equipmentfor maintenance and operation.

4.8 Except for the case of expansion fittings in bus bars, aluminum or aluminum alloysshall be used exclusively for gas filled enclosures. Joints of dissimilar metals whichcould lead to corrosion shall be avoided.

4.9 Operating devices, push buttons, lamps and indicating instruments shall be locatedabove 0.7 m and below 1.8 m from the finished floor level unless otherwise agreed toin writing by the Buyer.

4.10 The switchgear and its support framework shall be designed for the seismic zonespecified without permanent damage, deformation of parts, or any resulting mal-operation which would be destructive to the switchgear or to other equipment which isconnected to the switchgear.

4.11 The connection between all switching device contacts and the operating mechanismshall be such that drive is positive in all directions and under all conditions. Positivelydriven indication of the position of all switching devices shall be provided for allpositions and shall be conspicuously located in the operational area of the switchgear.

4.12 Each circuit shall be provided with test facilities to allow for:

• Voltage testing of the circuit with all parts connected to the facility compatible withthe full test voltage for cables that can be connected to the switchgear.

• Protection testing using both primary and secondary current injection

• System Phasing

4.13 Seller shall specify the type, required quantity, and operating pressure for any gas filledcompartment or equipment. The maximum acceptable rate of leakage shall be 1% per




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annum at the nominal filling pressure. Connections between switchgear modules shallbe sealed with O-rings.

4.14 A pressure indicator shall be provided and include a set of changeover contacts thatoperate when the pressure falls to the minimum operational pressure.

4.15 Quick acting filling couplings shall be provided for compartments suitably arranged toavoid inadvertent gas loss. Couplings shall be corrosion resistant and suitable for usewith the fill gas.

4.16 All gas compartments shall be fitted with filter material which absorbs the residual andentering moisture inside each high voltage compartment. Filters in gas compartmentswith switching devices shall also be capable of absorbing the gas decompositionproducts resulting from the switching arc. To provide adequate safety in case ofmaintenance, the gastight bushing must be able to withstand twice the service gaspressure at one side against 0 bar (absolute) on the other.

4.17 If in spite of all safety measures, should an arc should occur, the following is required:

• The effects of an internal arcing fault must be limited to the related gascompartment.

• Each gas compartment must have its own pressure relief device to provide instantand safe discharge of accidental overpressure during an internal arc. Rupturediaphragms shall be preferably used as pressure relief mechanisms. Such gasdischarge must be directed away from the normal operation position of theswitchgear so that persons standing there are not endangered. If necessary,diverter nozzles shall be provided to ensure that the gas is directed away from

this position. Internal relief devices between adjacent compartments are notacceptable.

• All earthing connections must remain operational.

• The enclosure of the switchgear must withstand the thermal effects of an arc atthe full rated short-circuit detailed in the Data Sheets.

4.18 Circuit Breakers

4.18.1 Circuit breakers shall be fixed, single phase encapsulated type.

4.18.2 SF6 shall be used as an arc-quenching and insulating medium on single-pressure,single-break and self compression-type circuit breakers. The insulating mediumsurrounding other live parts shall be SF6.

4.18.3 Circuit breakers shall be stored energy spring type, electrically operated with motor-spring operation and be provided with an anti pumping facility in the circuit breakerclosing circuit. Pneumatic or hydraulic mechanisms are not acceptable.




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4.18.4 The operating mechanism shall be capable of a complete O-0.3s-CO-3min-COsequence per IEC standard. Tripping of the circuit breaker shall be possible in theevent of drive motor failure or loss of auxiliary voltage supply.

4.18.5 Double bus bar systems shall be supplied with a bus coupler breaker and itsassociated bus bar isolators to facilitate bus transfer operations. The bus couplershall have the same continuous current rating as the bus bars.

4.18.6 Mechanical indicators shall display the position of the main contacts of the circuitbreakers.

4.18.7 The circuit breakers are intended for extended mechanical endurance. Thenumber of permissible mechanical operations is 10,000 (class M2 IEC 62271-100).

4.19 Isolators

4.19.1 Isolators shall be three-phase motor operated type. Motor auxiliary voltage shall beas indicated on the Data Sheets.

4.19.2 Isolator switch position shall be displayed locally by mechanical indicators directlyconnected to the drive mechanism shaft.

4.19.3 A minimum of four normally open (NO) and four normally closed (NC) mechanicallycoupled auxiliary switches shall be provided for remote indication and interlockingpurposes. All auxiliary contacts shall be wired to terminal blocks for Buyer

connections.

4.19.4 The isolator and its associated earthing switch shall be mechanically interlocked.

4.19.5 The isolator shall be capable of hand crank operation. Insertion of the hand crankshall disable the electrical operation of the isolator.

4.20 Earthing Switches

4.20.1 Earthing switches shall be three-phase motor operated type. Motor auxiliary

voltage shall be as indicated on the Data Sheets.

4.20.2 Earthing switches shall only be operable from the switchgear local control panellocation, and interlocking shall be provided to prevent earthing live equipment.

4.20.3 Earthing switches on feeders shall be equipped with high-speed operatingmechanisms and fault making contacts.




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4.20.4 Bus bar earthing switches shall be supplied with sufficient auxiliary contacts toprovide positive position indication to the other bays of the switchgear forinterlocking purposes and for remote indication. Alternative methods may beemployed, but will be subject to the approval of the Buyer. All auxiliary contactsshall be wired out to terminal blocks for Buyer connections.

4.20.5 The earthing switch shall be capable of hand crank operation. Insertion of the handcrank shall disable the electrical operation of the earthing switch.

4.21 Bus Bars

4.21.1 Bus bars and connections shall be manufactured from electrolytic copper. Both theconductors as well as the contacts for the conductor connections shall be designedfor the continuous rated current of the switchgear under the ambient conditionsspecified and shall not exceed the permissible temperature rise stated in the Data

Sheets.

4.21.2 The three phase bus bars shall be enclosed either in a single gas filledcompartment or individual compartments per phase as dictated by themanufacturer’s standard design and/or rated voltage. The final configuration ofavailable alternatives is subject to the approval of the Buyer.

4.21.3 All bus bars and connections shall be sized, braced and supported to withstand themechanical forces and thermal effects resulting from the switchgear rated shortcircuit current and carry certification from a recognised Testing Authority. Thermalrating for all current carrying parts and insulating materials shall be a minimum of 1

second for the rated short time withstand current.

4.22 Primary Terminations

4.22.1 Termination modules shall be provided by the Seller for connection to overheadlines, cables, or transformers as indicated on the drawings and Data Sheets. Forincoming overhead line applications, the termination units shall consist of outdoor,gas-filled bushings made of glazed porcelain, with through-the-wall gas filledtransition between the switchgear and outdoor bushings. For the case of multipleincoming lines, the Seller shall provide dummy bus bar sections as required to

separate the incoming breaker bays sufficiently to meet either minimum clearancesor project requirements. The final configuration shall be subject to the approval ofthe Buyer.

4.22.2 Cable or transformer termination modules (if specified) shall provide the means forisolating the cable or transformer bushing from the switchgear in order to allow forhigh voltage testing.




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4.22.3 The switchgear shall cater for either plug-in type or bar type terminations asindicated on the Data Sheets.

4.23 Instrument Transformers

4.23.1 All instrument transformers shall be suitable for continuous operation at rated andshort-circuit conditions and under the ambient conditions specified on the DataSheets.

4.23.2 Current transformers shall be either toroidally wound, ring-type or encapsulatedblock-type, and shall be mounted external to the gas enclosure. Currenttransformers shall be of the single or multi-ratio type with either one amp or fiveamp secondary windings as indicated on the one line diagrams and/or DataSheets.

4.23.3 Current transformer secondary terminals shall be brought outside of the high-voltage enclosure to a dedicated terminal box, mounted on the switchgear structurein an accessible location for each bay. All secondary leads, including intermediatetaps of multi-ratio current transformers, shall be wired to shorting type terminals inthe low voltage control cubicle of each bay. Each current transformer secondarywinding shall be earthed via a sliding link isolation terminal in the local low voltagecontrol cubicle. Unused cores (not connected to a secondary load) shall beshorted across the full secondary winding.

4.23.4 Current transformer ratios and accuracy classes shall be as indicated on the oneline diagrams and/or Data Sheets.

4.23.5 Voltage transformers shall be housed in a separate enclosure and shall bemounted either directly on the switchgear or remote from the switchgear using acable connection. In either case, the connection to the high voltage terminals shallbe made with plug-in type connectors. Equipment design shall allow flexibility inmounting the voltage transformer on either side of the isolator, and all secondarywindings shall be connected to Buyer terminal blocks in the associated bay low-voltage control cubicle. Primary and secondary ratios and accuracy classes shallbe provided as indicated on the one line diagrams and/or Data Sheets. Eachvoltage transformer secondary winding shall be earthed via a sliding link isolationterminal in the local control cubicle.

4.23.6 The Seller shall confirm (by calculation) the adequacy of the selected accuracy limitfactor of each current transformer based on the normal current loading, specifiedshort circuit current, current transformer ratios, and the Seller’s connected burdenfor all protective relaying required in the Material Requisition.




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4.24 Low Voltage Control Circuits

4.24.1 Local control functions shall include

• Switchgear interlocking functions

• MCB’s for low voltage equipment protection and isolation• Local operation of the switchgear

• Indicating and measurement equipment

4.24.2 Control equipment shall be located in the local control cubicle of each bay. Thesecubicles shall form an integral part of the switchgear supply, have a degree ofprotection of at least IP33 and shall not be installed over or attached to the GISequipment.

4.24.3 The equipment shall be supplied with one or two trip coils as indicated on the DataSheets. In the case of dual trip coils, the trip coil control circuits shall be electrically

independent, and all trip coils shall be electronically monitored to insure integrityand functionality. Trip coil monitors shall provide isolated output contacts for localand remote alarm indication. The trip circuit(s) shall be directly connected to theassociated auxiliary supply without overcurrent protection or other isolating means.

4.24.4 Low voltage control circuits shall be designed to operate continuously at the supplyvoltage indicated on the Data Sheets. Each equipment bay shall be wired to allowconnection to two external auxiliary control supplies corresponding to the number oftrip coils supplied. The last device in each auxiliary distribution circuit shall be avoltage monitoring relay with two Form-C contacts wired to Buyer terminal blocksfor external alarms. Terminal blocks shall be provided in each bay for connection

to Buyer’s external auxiliary supply and shall be sized to accommodate the Buyer’sspecified wire size as indicated on the Data Sheets.

4.24.5 All control circuits other than the trip circuits shall be supplied with two-poleminiature circuit breakers to provide isolation from the auxiliary supply to which theyare connected, and shall be sized to properly coordinate with the Buyer’s upstreamauxiliary supply protection device. These circuit breakers shall be supplied withone normally closed auxiliary contact which shall, in turn, be connected in serieswith other auxiliary contacts to provide a common bay “MCB Tripped” alarm.

4.24.6 Switchgear control shall be interlocked to provide absolute protection to prevent

potentially harmful operation of the switchgear, and the logical operating sequenceof the circuit breaker, isolators, disconnectors and earthing switches shall be suchas to inhibit unsafe operations. Such interlocks may be hard wired, electrical,electronic, or a combination of these and, in the case of the latter two, failure of theinterlocking device(s) shall revert to a “safe” operating mode. Interlocks shall beactive regardless of local or remote operation of the equipment. The Seller shallprovide a complete set of logic diagrams for Buyer review prior to construction ofthe equipment.




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4.24.7 Facilities for local control of the switching devices shall be provided by a localoperator control panel in each bay low voltage control cubicle. The local operatorcontrol panel shall be equipped with an integrated key switch to allow bypassing ofthe bay interlocks by the maintenance operator.

4.24.8 Independent gas compartments shall be monitored by gas density monitors withtwo-stage operation, the first stage providing alarm contacts, and the second stageproviding lockout of switching circuits under conditions of insufficient gas density forsafe operation of the equipment. Indicating gauges shall be provided at the front ofeach bay or in the local low voltage control cubicle for monitoring the condition ofthe gas in each compartment.

4.24.9 Anti-condensation heaters shall be provided in the local control cubicle and in theoperating mechanism housings of switching devices as indicated on the DataSheets.

4.25 Earthing

4.25.1 All metallic non-current carrying parts of the switchgear and its supportingframework shall be bonded together by the Seller as per the Seller’s standarddesign. Connection points in the form of welded, drilled and tapped earthing padsor threaded earthing bosses shall be provided by the Seller to allow connection tothe Buyer’s safety earthing system.

4.25.2 The doors of all auxiliary cubicles shall be bonded to the main structure of the

enclosure by means of a flexible copper connection arranged so that it cannot bedamaged when the door is opened or closed.

4.25.3 Provision shall be made adjacent to the cable termination for connecting cablearmor to the switchgear earthing system.

4.25.4 Single-phase enclosed switchgear shall incorporate looping circuits to avoid inducedcurrents in the enclosures as per IEC 62271-203, Section 5.3.102.

4.26 Auxiliary Power and Control Wiring

4.26.1 Power and control wiring shall be PVC-insulated, flame retardant, 600V switchboardwire with fine-stranded copper conductors. Minimum cross sectional area shall be1.5 mm2 for control wiring and a minimum of 2.5mm2 for current and voltagetransformers.




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4.26.2 Power and control wiring within the switchgear shall be securely held in position(either loomed or run in plastic wireways). Seller shall adequately size all wirewaysto accommodate internal wiring and field cabling as necessary.

4.26.3 Wiring identification shall be by number and/or letter imprinted, interlocking ferrulesof insulating material, and shall be located adjacent to the terminals. The ferrulesshall be indelibly marked and removal without disconnecting the wire from itsterminal shall not be possible.

4.26.4 Flexible cables shall be used for connections to door mounted equipment. Wiringshall be loomed/wrapped in flexible PVC conduit and be firmly clamped at both endsto prevent movement at terminations.

4.26.5 All wiring for external connections shall be brought out to individual terminals on areadily accessible terminal block. Terminal blocks shall be of a high-density design

that allows multiple connections to the same electrical node with no more than onewire per connection. Jumper links between adjacent terminals, where required, shallbe of the terminal manufacturer’s design. Other jumper links shall be made withconductors conforming to the requirements of 3.11.1 and identified as indicated inSection 3.11.3 above. Wire ends for control wiring shall be fitted with crimp onferrules.

4.27 Metering, Protection, and Control

4.27.1 Metering, protection and control shall be provided as shown on the single line

metering and relaying diagram and/or as required in the Data Sheets.

4.27.2 Metering and protection devices shall be housed on separate free-standing controlpanels. Panels shall be designed to be bolted together into a suite, with enclosedsides included only on the panels at each end of the suite. Panels shall be designedfor front access only, with apparatus requiring rear access or visual inspectionmounted on a swing frame on the front of the panel.

4.27.3 Unless otherwise indicated on the Data Sheets, integration of bay control andprotective relaying into a common device is preferred. The control functions shallinclude the following capabilities:

• Provide the means for programming logic functions for control and interlocking

• Provide for inter-bay communications with other bay controllers of the switchgear

• Provide a connection port for programming using the Seller’s application software

• Provide a system port using the communications protocol indicated in the DataSheets for remote communications to, and control capability from a remote,centralized facility

• Provide synchronization capability from an external GPS clock




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• Provide a sufficient number of digital inputs, suitable for continuous operation atthe specified auxiliary voltage, as required to implement the control and statuslogic

• Provide a sufficient number of discrete, isolated relay outputs for operation of theswitchgear and signalling purposes

• Provide loss of communications detection for any of the communications ports, inaddition to the failure of the device itself, via isolated alarm contact(s)

• Provide a front-panel LCD screen for an interactive mimic diagram of theswitchgear, including control functions and measured values

• Provide internal configurable logic to associate digital inputs with relay outputs forcontrol and interlocking purposes

4.27.4 All primary protective relays shall be of the digital, multifunction, numerical typeunless otherwise indicated in the Data Sheets, and shall incorporate the followingfeatures as a minimum:

• Provide the protection functions indicated on the metering and relaying one linediagrams and/or Data Sheets

• Provide variable setting groups to cater for changes in network configuration

• Provide a connection port for programming using the relay manufacturer’sapplication software (supplied by Seller)

• Provide synchronization capability from an external GPS clock

• Provide internal configurable logic to associate protection functions with discreterelay output contacts and front panel LED indicators

• Provide two independent relay output contacts for each trip circuit

• Provide oscillographic records with selectable pre- and post-fault recordingintervals

• Provide an auxiliary port for uploading oscillographic records via Ethernet LANutilizing the relay manufacturer’s analysis software (supplied by Seller)

• Provide for selectable protection functions (from the available set of functionsavailable in the purchased model). Functions that are not selected shall notrequire configuration.

• Provide front-panel reset capability to extinguish fault LEDs and reset lock-outfunction

• Provide LCD readout of measured values, alarms, and fault indications

4.27.5 Bus bar protection, when specified, shall be of the low impedance, numerical type,and shall be arranged in either a centralized or distributed configuration. In the caseof a double bus bar configuration, the bus bar protection system shall provide forreplicating the bus bar zone configuration using auxiliary contacts from bus barisolators without the need for current transformer zone switching. If a distributed busbar protection system is used, the individual bay units shall be interconnected to thecentral unit using fiber optic patch cords (provided by Seller) and shall be located inthe low voltage control cubicle of the switchgear bay. The bus bar protection systemshall be housed in one or more free-standing panels complying with the requirements




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indicated in Section 4.26.2. The central unit shall provide the facility for faultindication via front panel LED indicators and detailed fault information via an LCDreadout. Bay units shall provide selectable back-up overcurrent and breaker failureprotection and shall be capable of operating autonomously in back-up mode in caseof communication failure with the central unit. Communication and/or device (either

central or bay unit) failure shall initiate alarm contacts for remote indication.

4.27.6 Protective relays shall be flush-mounted and withdrawable from their enclosure,either in total or on a plug-in printed circuit board (PCB) basis. In either case,removal of the draw-out component(s) shall not require the removal of external wiringfrom the chassis, and shorting contact shall be provided as an integral feature of therelay case to insure that the CT is shorted when the draw-out or current carrying PCBis withdrawn. The dimensions of flush mounted devices shall not impede the swingframe opening over its full travel.

4.27.7 Protective relaying circuits shall be equipped with a means of secondary injection,

either in the form of test blocks or test switches, which provide for shorting andisolation of the CT secondary and isolation of trip circuits. If more than oneprotection relay is supplied from a single CT, the test block or switch shall provideisolation and bypass of the intermediate relay without affecting the operation of theend relay.

4.27.8 Digital instruments are preferred where separate metering is required. If the use ofanalogue instruments is specified on the Data Sheets, external zero adjustment shallbe possible without dismantling the instrument. Ammeters shall be scaled such thatfull load corresponds to between 50 and 80% of the angular deflection.

4.27.9 If the switchgear is used at the point of coupling to the external Utility grid, the type ofmetering and the associated accuracy requirements shall be in compliance with theUtility requirements as specified on the Data Sheets.

4.27.10 Instrument transformer windings used for metering purposes shall have meteringaccuracy classes as indicated on the Data Sheets.

4.27.11 Instrument transformers shall be supplied with a nameplate in accordance with IEC60044-1 and IEC 60044-2 for current and voltage transformers, respectively. Forcurrent transformers under gas, the nameplates shall be affixed in a conspicuouslocation to the exterior of the gas filled chamber housing the CTs, and shall indicatethe CT orientation with regard to terminal markings.

4.27.12 Measuring transducers shall be of the universal type with configurable outputs asindicated on the Data Sheets. Seller shall provide transducer manufacturersconfiguration and analysis software for installation on Buyer’s supplied portable PC.Communications capability via the protocol specified shall be provided when requiredon the Data Sheets. Local connection to the device shall be via serial RS232connector, with remote communications via RS485 interface when required.




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Transducers shall be wired to shorting/isolation terminal blocks to allow testing orremoval without disturbing other devices connected to the measuring transformer(s).

4.27.13 All protection relays shall be fully configured by Seller prior to factory acceptancetests, and shall provide the functionality detailed in the single line diagrams and

elsewhere. A complete set of software and manuals shall be provided by the Sellerfor the protection relays supplied. The supplied software shall include both relayconfiguration and fault analysis capabilities and shall operate in the MicrosoftWindows

® environment.

4.28 Labels

4.28.1 Labels shall identify switchgear cubicles, compartments and components.Nameplates, rating plates and labelling of equipment and wiring shall be inaccordance with the relevant IEC Standards. Functional unit label designations

shall be located at front and rear of each bay, and shall be constructed of laminatedengraved black and white plastic with black lettering approximately 20 mm highgiving the designations shown on the single line diagram.

4.28.2 All devices including relays, meters, push buttons, lamps, fuses, contactors, andtimers shall be clearly labelled to indicate their purpose. Relay labels shall reflectthe configured protection functions using IEEE Standard function codes. Labelsshall be positioned to provide easy identification and correspond to the designationon the Seller’s drawings. Such labels shall have minimum lettering sizes ofapproximately 6 mm high for labels external to control cubicles, auxiliaryenclosures, and relay panels, and 4 mm high for labels internal to these

enclosures. Internal labels shall be secured adjacent to the equipment but not onremovable covers. They shall be positioned to allow replacement of labels,equipment or fixings, and may make use of a durable proprietary labelling systemunless specifically indicated otherwise. Labels shall include the rating of eachdevice in addition to identifying marks.

4.28.3 Door mounted devices shall be labelled next to the device on both sides of thedoor.

4.28.4 External labels shall be engraved on laminated plastic and attached with stainlesssteel machine screws into tapped holes. Where the label is longer than 100 mm,holes shall be elongated and provided approximately every 100 mm.

4.28.5 All main components of the switchgear shall be supplied with nameplatescomplying with the requirements of Section 5.10 of IEC 60694 and IEC 62271-203and as otherwise supplemented in the Data Sheets.




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4.28.6 Labels shall have black characters on a white background. Danger labels shallhave white characters on a red background. Warning labels shall have blackcharacters on a yellow background.

4.29 Finish

4.29.1 The color and finish shall be in accordance with the Manufacturers standards forthe service conditions specified in the Data Sheets unless indicated otherwise onthe Data Sheets.

4.30 Accessories

4.30.1 A complete set of special tools required for operation, maintenance and testing ofthe switchgear shall be provided.

4.30.2 Seller shall provide an initial filling of the switchgear with SF6 gas for all gas tightcompartments of each switchgear bay to facilitate factory acceptance testing. Asupplemental filling shall be supplied by the Seller for filling/topping upcompartments and bus enclosures requiring evacuation during switchgearassembly and testing on site.

4.30.3 Seller shall provide one complete set of test plugs, adapters, and connecting leadsrequired by the relay manufacturer for testing of the relays via the test blocks or testswitches indicated in Section 4.26.5.

5.0 TESTING AND INSPECTION

5.1 Test Certificates

5.1.1 Tests and test conditions shall be in compliance with the referenced IEC standardsand local codes and standards. Equipment shall be classified IAC and Type Testcertified per Annex-A of IEC 62271-200.

5.2 Customer Witness

5.2.1 The Buyer reserves the right to witness the following tests at the Seller’s facility:

• Routine tests on the switchgear as specified in the relevant standards (refer to Appendix A)

• Functional tests of control circuitry as specified in the relevant standards

• Integrated functional testing of protective relaying systems by primary injection ofcurrent and voltage as agreed. These tests may be deferred until site acceptance




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testing depending on the availability of relay/control panels at switchgearmanufacturer’s facility as agreed by the Buyer. If an integrated test cannot beperformed at Seller’s facility, a separate factory acceptance test of the relaypanels shall be scheduled by Seller at the relay panel builder’s facility.

• Type Tests if required in the Data Sheets. Type test reports shall be supplied

regardless of testing requirement, and type test reports for similar equipment shallbe supplied with the tender if such tests are not specifically required in the DataSheets.

5.2.2 Certificate(s) for witnessed tests shall be available for signature on the day of thetests.

5.3 In-Process Inspections

5.3.1 The Buyer reserves the right to inspect switchgear at the Manufacturer's works at any

time to verify compliance with this specification.

5.3.2 The completed switchgear shall be subjected to all routine tests as prescribed in theapplicable IEC standards and any special tests indicated on the Data Sheets. Thesetests shall be conducted at the Sellers facility and in the presence of the Buyer or hisrepresentative.

5.5 Type and routine testing

Tests made on representative samples that are intended to be used as part ofroutine production. The applicable portions of these “Type Tests” may also be used

to evaluate modifications of a previous design and to ensure that performance hasnot been adversely affected. All equipment proposed according to this specification must have been type tested attypical units in accordance with the latest revision of relevant IEC Standards. Anevidence of type testing shall be submitted with the proposal.

The following type tests shall have been performed:Dielectric voltage withstand testsPower frequency withstand voltageBasic Impulse withstand voltage Level (BIL)Switching Impulse withstand voltage Level (SIL) (if applicable)

Circuit breaker and disconnect switch open–gap withstand voltageMaking and breaking capability testShort time current test and peak current testMechanical and electrical endurance testContinuous current carrying and temperature rise testCurrent path resistance measurementPressure testsPartial discharge test




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Electromagnetic compatibility tests (EMC)Circuit breaker testsDisconnect switching testsInstrument transformer testsEnclosed surge-arrester tests

Grounding switch tests

5.6 Routine or Production tests

Production tests should be made in the course of components assembly and at thecomplete or shipping assembly state.Tests should include, at a minimum, the following:

5.6.1 Pressure test performed on all individual enclosures.

Circuit breakers tests :

Operation with minimum and maximum control voltageVisual checks of closing and opening operations (five each) at specified minimumand maximum control voltage.Timing test for "C","CO" and "O-CO"Measurement of closing and opening time.Measurement shall be carried out at rated stored operating energy (at pump-off)and at minimum stored operating energy (at CO block).Operating test of magnetic release: Visual check of magnetic release at minimumsupply voltage (70% of rated voltage).Operating test of pump motor (if applicable): Visual check of pump motor atminimum supply voltage (85% of rated voltage).

Hydraulic leak test: Visual check of hydraulic system. No visible leakage ispermitted.Measurement of the resistance of the main circuit (voltage drop test): Themeasurement per phase shall be made with a current of ≥ 100 A DC.Check of auxiliary and control circuitsPower frequency withstand test on control and auxiliary circuits. The test voltageshall be 2000 V for 1 min. No flashovers are permitted.Tests on disconnect switches and ground switchesVisual check of fifty operating cycles at rated supply voltageVisual check of ten operating cycles at specified maximum voltageVisual check of ten operating cycles at specified minimum voltageCurrent transformer testsPower frequency withstand tests on secondary windingsPower frequency withstand tests between sectionsPower-frequency withstand voltage test on primary winding and measurement ofpartial dischargesTest for accuracyVerification of terminal markingsVoltage transformer tests




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Power frequency withstand tests on secondary windingsPower frequency withstand tests between sectionsMeasurement of partial discharges (150% of rated max. phase voltage)Test for accuracyVerification of terminal markings

Tests on transport unitsGIS modules or components shall be assembled in the factory to transport units.The size of the transport units shall be defined by engineering and shall be aslarge as practical for shipment to the site and handling during installation. Onassembly units without support or barrier insulator dielectric tests are notnecessary.The following tests are to be carried out on each transport unit :Dielectric voltage withstand tests:Tests shall be in accordance with the IEC Standards 60694, 62271-203 and60060.For these tests, all gas compartments shall be filled with SF6 gas at minimum

operation pressure.Power frequency voltage tests of the main circuit:The transport unit shall be subjected to a test voltage of 60 Hz for 72 sec. Thetest voltage level shall be as IEC 60694 standard.Partial discharge test:

All internal portions of the GIS system shall be tested for partial discharge at150% of the rated maximum voltage on the downward excursion of voltage fromthe power frequency withstand voltage. Extinction of the partial discharge mustoccur above the 150% point. The measured value shall be lower than 5 pC.Measurement of the resistance of the main circuit:The measurement per phase shall be made with a current of ≥ 200 ADC. Thereading shall be given in "mV". The measured value depends on the arrangementof the transport unit. This value shall not exceed the calculated sum of themaximum voltage drop of the single modules and the connection units used.Gas leakage test:This test shall be carried out for each transport unit.The test unit shall be filled with the rated SF6 pressure and checked with aleakage detector. All flanges, bolted joints and gas fittings shall be checked.

5.7 Field Testing

The following tests shall be performed on the completely assembled switchgear atsite after installation. Test results as well as test conditions like ambient temperature,gas pressure, dew point and all necessary conditions shall be documented and theresults compared with the relevant instructions and factory test reports. A final sitetest report shall be supplied to the Owner within 4 weeks after the tests have beenfinished.

The following shall be inspected and verified:Conformity of the assembly with the manufacturer's drawings and instructions.




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Tightening of all pipe junctions, bolts and terminal connections.Visual check of all control circuits, PT circuits, and CT circuits.Copy de nameplate of PT’s, CT’s and lightning arrestersProper function of the control, measuring, protective and regulating equipmentincluding heating and lighting by means of the relevant commissioning reports.

Mechanical operation tests of Circuit Breaker, Disconnecting switch, earthingswitch and fault making earthing switch.Rated SF6 gas pressure and control voltage:O-CO operation, 10 times.Maximum control voltage: O-CO operation, 3 timesMinimum control voltage: O-CO operation, 3 timesMechanical test (SF6 gas leakage test)The following parts shall be checked, using a leakage detector for SF6 gasindication:Each flange connection installed on siteEach gas coupling

Each bursting discDC resistance measurement of the main circuits:The measurement per phase shall be made with a current of ≥ 200 ADC and thevalues compared with the results of the factory routine tests. The reading shall bedocumented per phase and the measuring points defined.Gas density monitor checkMeasurement of moisture content:The moisture test (dew point measuring) shall be made on > 10% of the SF6 gascompartments 3-4 weeks after gas filling. The moisture level shall then be withinthe specified level.Interlock testOperational TestsManual operating check of circuit breaker, disconnect switch, earthing switch andfault making earthing switch.High voltage dielectric test of main circuit:

After the completion of installation and filling with SF6 gas at its rated density, theGIS shall be tested with 80% of the AC voltage applied for the factory routinetests. Test duration shall be 1 minute. During these tests, the high voltageconnections like overhead lines, HV cables or transformer connections shall bedisconnected. These tests shall be performed by means of special HV testingequipment connected to the GIS. The special testing equipment and special testadapters for flange connection (if required) shall be supplied by the manufacturerfor temporary use during the tests. Each switching condition during the testsincluding the connection point of the test transformer shall be documented in copyof the single line diagram.Inductive voltage transformer testsDielectric test of control circuit at 2 kV r.m.s. for (1 min)

5.8 Pre-commissioning and Commissioning




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The Supplier shall provide:

Competent representatives in the field to assist in the handling, assembling andinstallation equipment.Competent representatives for pre-commissioning to support in the components

and drive system testing and to assist with the commissioning.Buyer requires experienced field representatives with prior projects on gearlessdrives. Buyer will have the right to require a replacement in case of irresolvabledifferences.Quote per diem rates and conditions for services for qualified installationsupervisors and commissioning engineers, along with their recommendations asto the number of people and the length of time needed.

6.0 TRAINING

For operation and maintenance of the electrical systems, it is Buyer’s intent to rely on

their own personnel to the maximum extent possible. Training is required to bring theBuyers qualified operators and engineers up to date in the operating, troubleshootingand servicing of the equipment covered by this specification. It will be the jointresponsibility of the Buyer and Supplier to implement this requirement.

Supplier shall state in proposals, what kind of formal training courses are available inEnglish and Spanish in use at the plant, what the entrance requirements are, and thecourse durations. Recommendations shall be given along with the reasons for suchsuggestions, and whether these formal instructions shall preferably take place in theSupplier’s training centers and/or on the job-site.

The use of the integrated power and control package makes it desirable to haveBuyer’s personnel train on their own equipment during and after the pre-commissioning and testing of the containerized equipment. Supplier shall quote sucha training course, together with a brief description of training activities

7.0 QUALITY CONTROL

7.1 See section 5 of the Material Requisition “Supplier Quality Surveillance”.

8.0 PACKING AND SHIPPING

8.1 See section 7 of the Material Requisition “Packing, Marking and Shipping Instructions”.




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9.0 SPARES

9.1 See section 1 of the Material Requisition “Scope of Works”.




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APPENDIX A

INTERNATIONAL STANDARDS

IEC STANDARDS

IEC 60044 Instrument transformers

IEC 60068 Environmental testing

IEC 60073 Basic and safety principles for man-machine interface, marking and identification –Coding principles for indication devices and actuators

IEC 60137 Insulating bushings for alternating voltages above 1000V

IEC 62271 High-voltage switchgear and controlgear – Part 100: High-voltage alternating-currentcircuit-breakers

IEC 62271 High-voltage switchgear and controlgear – Part 102: Alternating currentdisconnectors and earthing switches

IEC 62271 High-voltage switchgear and controlgear – Part 200: AC metal-enclosed switchgearand control gear for rated voltages above 1kV and up to and including 52 kV

IEC 60255 Electrical relays

IEC 60269 Low-voltage fuses

IEC 60445 Basic and safety principles for man-machine interface, marking and identification -

Identification of equipment terminals and of terminations of certain designatedconductors, including general rules for an alphanumeric system

IEC 60529 Degrees of protection provided by enclosures. (IP Code)

IEC 60617 Graphical symbols for diagrams.

IEC 60694 Common specifications for high-voltage switchgear and controlgear standards.

IEC 60947 Low-voltage switchgear and controlgear

IEC 61000 Electromagnetic compatibility (EMC)

IEC 62271 High-voltage switchgear and controlgear – Part 203: (Gas insulated metal-

enclosed switchgear for rated voltages of 52 kV and above)

IEC 60427 Synthetic testing of high-voltage alternating-current circuit breakers

IEC 60129 (1984/1992) Alternating current disconnectors and earthing switches

IEC 61128 Alternating current disconnectors Bus-transfer switching by disconnector




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IEC 61129 Alternating current earthing switches Induced current switching

IEC 60859 Cable connections for gas-insulated metalenclosed switchgear for rated

voltages of 72.5 kV and above

IEC 60099-4 Metal-oxide surge arrestor without gaps for a.c. systems

IEC 60439 Factory-built assemblies of low-voltage switchgear and controlgear

IEC 60376 Specification and acceptance of new sulphur hexafluoride

IEC 60480 Guide to the checking of sulphur hexaflouride taken from electrical equipment

ANSI/IEEE STANDARDS

IEEE Std C37.2 IEEE Standard Electrical Power System Device Function Numbers and Contact

Designations

tdt gis 220 kv - antapacay 25580-220-3ps-esi1-00002

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