132kV Outdoor GIS Substations and Ancillary Equipment_Volume 2
Short Description
132 kV Outdoor Gas Insulated Substations & Ancillary Equipment...
Description
ELECTRICITY AUTHORITY OF CYPRUS
132 kV Outdoor Gas Insulated Substations & Ancillary Equipment
SECTION 5
CONTRACT REQUIREMENTS
132kV Outdoor GIS Substations and Ancillary Equipment_Contract Requirements.doc
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Table of Contents 1.1
DESCRIPTION OF THE PROJECT.....................................................................................................................3
1.2
EXTENT OF CONTRACT ....................................................................................................................................3
1.3
CONTRACT TERMINAL POINTS........................................................................................................................7
1.4
PLANT ERECTION, TESTING AND COMMISSIONING.....................................................................................9
1.5
BUILDINGS..........................................................................................................................................................9
1.6
TOOLS AND APPLIANCES ..............................................................................................................................10
1.7
SPARES.............................................................................................................................................................11
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1.1
DESCRIPTION OF THE PROJECT
The Project works are to be carried out at the International Airport and Pyla substations. Both substations are situated in the southeast coast of Cyprus near the town of Larnaka. The Project includes the refurbishment of both substations with the installation of new outdoor 132kV GIS switchgear, 40MVA 132/22-11kV power transformers, earthing transformers, power cable termination work and refurbishment of the protection and control system. It also includes the supply of one 22kV Medium Voltage switchboard for Protaras substation, one 22kV Medium Voltage switchboard for Limassol Marina Primary Substation and one 40MVA 132/22-11kV power transformer for Larnaka Commercial Substation. Finally it includes the installation of protection panels at Dhekelia, Larnaka Commercial Centre, Free Industrial Zone Substations and other ancillary equipment.
1.2
EXTENT OF CONTRACT
The Contract is on a turnkey basis and provides for all parts of the work, excluding civil works, to be completed in every respect for commercial operation to the requirements of the Engineer.
1.2.1
Work Description
The Contract covers the design, manufacture, inspection and testing at the maker's works and at site, packing for export shipment, insurance, transport and delivery to site or store, unloading, customs clearance, complete erection, testing and setting to work and maintenance for a period of twelve (12) months of the works described below and detailed in the Schedules at the fixed scheduled prices: 1.2.1.1
Pyla Substation
The contract includes the following: •
Supply and installation of a double busbar 9 bay Outdoor 132kV Gas Insulated Switchboard: o
2 Transformer Bays
o
4 Line Bays
o
2 Bus Section Bays
o
1 Bus Coupler Bay
•
Supply and installation of 2 x 40MVA 132/22-11kV Power Transformers and 2 x Earthing Transformers
•
Cut, divert and terminate 2 x 800mm2 to new GIS
•
Lay and terminate 1 x 300mm2 132kV cables between power transformer and GIS (2 Transformers)
•
Lay and terminate 3 x 630mm2 medium voltage cables between power transformer and existing 11kV switchgear and 1 x 300mm2 medium voltage cable between power transformer and earthing transformer (2 Transformers)
•
Protection and Control:
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o
1 Automated System (IEC 61850)
•
Signals of existing substation to be transferred to new system from existing ABB RTU200 / COM 500 with IEC 61850-5-104. These signals shall be provided by EAC. It is the contractors’ responsibility to program the new automation system to accept these signals and also include a mimic diagram of the M.V. switchboard on the HMI.
o
2 Transformer Protection & Control Panels..
o
4 Line Protection & Control Panels
o
1 Bus Coupler & Bus Section Protection & Control Panel.
o
Busbar Protection.
o
1 Transformer Voltage Regulation Panel to include 3 AVR relays of the latest technology equipped with all the necessary modules to allow the automatic voltage control of power transformers using the minimum circulating current principle, manual step up and step down operation of tap changer, indications, communication facilities for remote and supervisory control
o
Engineering, Wiring, Testing and Commissioning of the complete system, i.e. new equipment, interconnections with existing, to deliver a complete system.
300Ahr DC Battery System.
For Transmission System operational reasons, the installation of the substation equipment shall be carried out in two consequent phases, as per the Tender Drawings, without a time delay in between. The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. 1.2.1.2
International Airport Substation
The contract includes the following: •
Supply and installation of a 7 bay outdoor 132kV Gas Insulated Switchboard o
3 Transformer Bays
o
3 Line Bays
o
1 Bus Section Bay
•
Supply and Installation of 3 x 40MVA 132/22-11kV Power Transformers and 3 x Earthing Transformers
•
Cut, divert and terminate 2 x 800mm2 to new GIS
•
Lay and Terminate 1 x 300mm2 132kV cables between power transformer and GIS (3 Transformers)
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•
Lay and Terminate 3 x 630mm2 medium voltage cables between power transformer and existing 11kV switchgear and 1 x 300mm2 medium voltage cable between power transformer and earthing transformer (3 Transformers)
•
Protection and Control o
1 Automated System (IEC 61850)
Signals of existing substation to be transferred to new system from existing ABB RTU200 / COM 500 with IEC 61850-5-104. These signals shall be provided by EAC. It is the contractors’ responsibility to program the new automation system to accept these signals and also include a mimic diagram of the M.V. switchboard on the HMI.
o
3 Transformer Protection & Control Panels.
o
3 Line Protection & Control Panels.
o
1 Transformer Voltage Regulation Panel to include 3 AVR relays of the latest technology equipped with all the necessary modules to allow the automatic voltage control of power transformers using the minimum circulating current principle, manual step up and step down operation of tap changer, indications, communication facilities for remote and supervisory control
o
Engineering, Wiring, Testing and Commissioning of the complete system, i.e. new equipment, interconnections with existing, to deliver a complete system.
For Transmission System operational reasons, the installation of the substation equipment shall be carried out in three consequent phases, as per the Tender Drawings, without a time delay in between. The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. 1.2.1.3
Larnaka Commercial Substation
The contract includes the following: •
Supply of one 40MVA 132/22-11kV Power Transformer and one Earthing Transformer. The power and earthing transformer shall be delivered to Larnaka Commercial Centre substation, where they shall be placed on their respective basis inside the transformer cells.
•
Installation of three Protection Panels. SCADA signals to be connected to existing system with IEC61850 protocol.
The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price.
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1.2.1.4
Dhekelia GIS Substation
The contract includes the following: •
Supply and Installation of two Protection Panels. SCADA signals to be connected to existing system with IEC61850 protocol.
The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. 1.2.1.5
Free Industrial Zone Substation
The contract includes the following: •
Supply and Installation of two Protection Panels. SCADA signals to be connected to existing system with conventional copper wires.
The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. 1.2.1.6
Protaras Substation
The contract includes the following: •
Supply of a 21-panel medium voltage switchboard to be delivered to EAC Larnaka Stores. This switchboard shall be installed by EAC personnel and as a result the contract includes for the training of EAC personnel so as to be certified for the installation of the switchboard. An IEC 61850 system as per drawing TK42/304 that will be able to handle all the SCADA signals as detailed in Chapter “Items of Equipment”, shall be provided. This shall manage the data exchange between the switchboard and the Control Centre. This communication shall be based on protocol IEC 60870-5-101.
The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. 1.2.1.7
Limassol Marina Primary Substation
The contract includes the following: •
Supply of a 17-panel medium voltage switchboard to be delivered to EAC Larnaka Stores. This switchboard shall be installed by EAC personnel and as a result the contract includes for the training of EAC personnel so as to be certified for the installation of the switchboard. An IEC 61850 system as per drawing TM/LIM96 that will be able to handle all the SCADA signals as detailed in Chapter “Items of Equipment”, shall be provided. This shall manage the data exchange between the switchboard and the Control Centre. This communication shall be based on protocol IEC 60870-5-101.
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The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. 1.2.1.8
Miscellaneous
The contract includes the following: •
Training Course for two people (One Engineer and one Technician) that will enable them to be qualified for the erection and commissioning of the medium voltage switchboards
•
Secondary Injection Test Set Type Omicron CMC353 with the Software Options VE002904 Advanced Protection
•
Omicron Switch Box CP SB1
•
Micafluid AG Vacuum Pump System, Type Micafluid VPU900
The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price.
1.3
CONTRACT TERMINAL POINTS
The following shall be the Contract Terminal Points:
1.3.1
Pyla Substation
1.3.1.1
132 kV GIS Switchgear - Outgoing Cable Feeders
Termination work of two “Dhekelia” outgoing circuits and two “Power Transformer” circuits is included in this contract. Termination work of all other circuits is not included. 1.3.1.2
22 kV Switchboard
The termination of two incoming 11kV feeders (Transformer Feeders) to the 11kV switchboard is included in this Contract. Control & Protection cabling required to complete the circuits is included in the contract. 1.3.1.3
Communication Panel
In the case of current differential protection relays through fibre optic media, the Contractor shall be responsible for connecting and terminating up to the multiplexer communication panel, which shall be provided by others, or the main fibre optic termination box as specified elsewhere in this Contract. 1.3.1.4
Fire Alarm and Fire Fighting Control Panels
The control cables required for the connection of the fire alarm and fire fighting control panels, which shall be provided by others, to the substation control centre for remote indication, are included in this contract.
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1.3.1.5
132 kV and 22 kV Power Cables
All 132 kV and the 22 kV power cables required for the completion of works at the substation shall be provided by the Purchaser. All accessories and works required for connecting these power cables will be the responsibility of the Supplier/Contractor. The Supplier/Contractor will not be responsible for the guarantee of the power cables but will be responsible for the guarantee of all connections.
1.3.2
International Airport Substation
1.3.2.1
132 kV GIS Switchgear - Outgoing Cable Feeders
Termination work of two “Free Industrial Zone” outgoing circuits and three “Power Transformer” circuits is included in this contract. Termination work of all other circuits is not included. 1.3.2.2
22 kV Switchboard
The termination of two incoming 11kV feeders (Transformer Feeders) to the 11kV switchboard is included in this Contract. Control & Protection cabling required to complete the circuits is included in the contract. 1.3.2.3
Communication Panel
In the case of current differential protection relays through fibre optic media, the Contractor shall be responsible for connecting and terminating up to the multiplexer communication panel, which shall be provided by others, or the main fibre optic termination box as specified elsewhere in this Contract. 1.3.2.4
Fire Alarm and Fire Fighting Control Panels
The control cables required for the connection of the fire alarm and fire fighting control panels, which shall be provided by others, to the substation control centre for remote indication, are included in this contract. 1.3.2.5
132 kV and 22 kV Power Cables
All 132 kV and the 22 kV power cables required for the completion of works at the substation shall be provided by the Purchaser. All accessories and works required for connecting these power cables will be the responsibility of the Supplier/Contractor. The Supplier/Contractor will not be responsible for the guarantee of the power cables but will be responsible for the guarantee of all connections.
1.3.3
Larnaka Commercial Substation
1.3.3.1
Protection Panels
All cables necessary for the correct operation of the protection panels shall be installed by the contractor. 1.3.3.2
Communication Panel
In the case of current differential protection relays through fibre optic media, the Contractor shall be responsible for connecting and terminating up to the multiplexer communication panel, which shall be provided by others, or the main fibre optic termination box as specified elsewhere in this Contract.
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1.3.4
Dhekelia GIS Substation
1.3.4.1
Protection Panels
All cables necessary for the correct operation of the protection panels shall be installed by the contractor. 1.3.4.2
Communication Panel
In the case of current differential protection relays through fibre optic media, the Contractor shall be responsible for connecting and terminating up to the multiplexer communication panel, which shall be provided by others, or the main fibre optic termination box as specified elsewhere in this Contract.
1.3.5
Free Industrial Zone Substation
1.3.5.1
Protection Panels
All cables necessary for the correct operation of the protection panels shall be installed by the contractor. 1.3.5.2
Communication Panel
In the case of current differential protection relays through fibre optic media, the Contractor shall be responsible for connecting and terminating up to the multiplexer communication panel, which shall be provided by others, or the main fibre optic termination box as specified elsewhere in this Contract.
1.4
PLANT ERECTION, TESTING AND COMMISSIONING
The Tenderer shall include the provision of all labour, technicians; testing and supervisory engineers to install test and commission the plant supplied under the Contract to the agreed program and shall include all costs associated with the activity including the cost of providing all necessary test equipment. The Tenderer shall fully consider the Regulations regarding the use of local labour for site works and clarify in his offer where expatriate staff will be used on site activities. Directions and instructions given by the Engineer's Representative or the Purchaser to the supervisors shall be interpreted as having been given to the Contractor. The supervisors shall be well qualified by long training and experience in the installation and operation of equipment of the type covered by the Specification. They shall liaise with the Engineer and the Purchaser's staff in respect of the installation, testing and placing into operational service of the substation equipment supplied under other contracts leading to commissioning of the complete substation or extension and for this purpose the English language shall be used.
1.5
BUILDINGS
Unless otherwise specified all substation buildings, foundations, walls, roof coverings, concrete floor fittings, ducts and pipework embedded in the foundations, trenches with floor plates for cables, etc., will be provided under other contracts. Tenderers should take into consideration the following: •
dimensions specified as per drawings.
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•
applied maximum load (including impulse load) on the floor of the GIS switchgear room should not exceed 20 kN/m2.
•
the available crane in the GIS room can carry a maximum load of 5.000 kg.
The magnitude of the loadings from plant or equipment onto foundations must be stated by the Tenderer. The loadings shall be confirmed by the dates given in the appropriate schedule. The Tender Drawings show the preferred layouts of all plant, equipment and buildings. Dimensions in these Drawings have been based on typical sizes of plant and equipment. In any case the width of Line, Cable and Transformer bays should no exit 1000mm for switchboards with 31,5kA rated short circuit withstand current and 1200mm for switchboards with 40kA rated short circuit withstand current. The Contractor should ascertain for himself during the tender stage that the plant he proposes to supply will be suitable for the arrangements shown on Tender Drawings, and the Contract Price is deemed to include the cost of any modified layout to meet the Employer's design principles. Failure of the Engineer or Employer to comment on drawings submitted by the contractor during the tender stage which show modified arrangements not complying with Tender Drawings and Design Principles shall not be accepted as approving such arrangements; any modifications proposed should be clearly stated in the Schedule of Departures.
1.6
TOOLS AND APPLIANCES
The following tools and appliances may be purchased under this Contract. The Tenderer's full list with itemized prices and details is to be given in the Schedule of Special Tools and Equipment of this Specification. (a) One set of any special tools or gauges required for the normal maintenance of the Plant and equipment covered by the Contract. (b) One set of any special lifting and handling appliances required for the normal maintenance of the Plant and equipment covered by the Contract. (c) One set of any special tools, gauges or other test equipment required for the dismantling, re-assembly, checking or adjustment (but not normal maintenance) of the whole of the Plant and equipment covered by the Contract. Each tool or appliance is to be clearly marked with its size and/or purpose. Each set of tools and appliances under category (a) above, together with the smaller items under (b) & (c) above, are to be suitably arranged in fitted boxes of mild steel construction, the number of boxes being determined in relation to the layout of the Plant and equipment in question. If the weight of any box and its content should be such that it cannot conveniently be carried it is to be supported on steerable rubber-tyred wheels. Each box is to be fitted with a lock and is to be painted black and clearly marked in white letters with the name of the Plant or equipment for which the tools and appliances therein are intended. The tools and appliances with the appropriate boxes are to be delivered to the Purchaser together with the switchgear.
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The price of such equipment as detailed in the Schedules shall remain fixed for the duration of the Contract.
1.7 1.7.1
SPARES General
The Tenderer shall complete the appropriate Schedules with a list of spares in addition to any specifically stated and provide unit prices for the spares which he recommends should be held in stock for the maintenance of the plant for at least 5 years of normal operation. 1.7.1.1
Programmed Maintenance Spares
Items for which the Contractor anticipates that demands will arise in the normal operation of the plant. The Contractor shall quote estimates of annual consumption of each item over each of the first five years. 1.7.1.2
Strategic/Breakdown Spares
Items for which the Contractor anticipates that demands may arise through breakdown which could jeopardize the availability or safety of the plant. The Contractor shall state his recommended stock holding for such items. The spares prices shall remain valid for at least twelve months after placing the contract provided also that a reasonable time will be provided after the contractor makes all necessary information available to enable determining the spares requirement. The Contractor shall indicate the items which he recommends should be manufactured at the same time as the main plant. For each of these items he must inform the Engineer the latest date by which orders are to be placed for concurrent manufacture. The Purchaser may order all or any of the spares so recommended at his discretion. The Tenderer shall state in the Schedule of Deliveries the minimum period required by him for the delivery of the spares from the date of the receipt by him of the Purchaser's order. The spares will be charged against the Provisional Sum included in the Schedule of Prices and are to be supplied at the prices listed in the Schedule of Spares subject to the qualification that, if any spares should be ordered after the dates referred to in this clause the price may be subject to adjustment. All spares supplied are to be strictly interchangeable with the parts for which they are intended to be replacements and are to be treated and packed for long storage under the climatic conditions prevailing at the Site and labeled for easy identification. Packing shall be on individual items or sets basis where appropriate. Labeling shall be such that spares can be correctly identified from reference quoted in the operation and maintenance manuals provided. All labeling shall be legible without unpacking the items.
1.7.2
Commissioning Spares
The Tenderer shall make his own provision for spares required during erection and commissioning without resorting to the use of the spares ordered and supplied under the contract.
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ELECTRICITY AUTHORITY OF CYPRUS
132kV Outdoor GIS Substations and Ancillary Equipment
SECTION 6
EAC SPECIFICATION 14-019 Transmission Substation Equipment
EAC SPEC 14-019, Issue 9 Dated 03-05-2010
Table of Contents 1.
SCOPE ............................................................................................................................................................................7 1.1
GENERAL ............................................................................................................................................................7 REFERENCES ................................................................................................................................................................8
2. 2.1
NORMATIVE REFERENCES ..............................................................................................................................8
2.2
INFORMATIVE REFERENCES ...........................................................................................................................8
2.3
LIST OF REFERENCES ......................................................................................................................................8 GENERAL TECHNICAL REQUIREMENTS ..................................................................................................................16
3. 3.1
DESIGN CRITERIA............................................................................................................................................16
3.2
COMPLIANCE WITH SPECIFICATION ............................................................................................................22
3.3
UNITS OF MEASUREMENT..............................................................................................................................26
3.4
DRAWINGS........................................................................................................................................................26
3.5
PROGRAM OF WORK ......................................................................................................................................29
3.6
PROGRESS REPORTS AND MEETINGS ........................................................................................................30
3.7
INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS.........................................................35
3.8
PACKING OR PREPARATION OF MATERIAL FOR DISPATCH ....................................................................37
3.9
CABLE DRUMS AND CABLE SEALING..........................................................................................................40
3.10
ERECTION MARKS...........................................................................................................................................40
3.11
TRANSPORT TO SITE ......................................................................................................................................40
3.12
ERECTION .........................................................................................................................................................41
3.13
CLEANING AND PAINTING..............................................................................................................................41
3.14
LABELS, NUMBER PLATES, AND PHASE IDENTIFICATION DISCS ...........................................................42
3.15
LOCKS ...............................................................................................................................................................43
3.16
TROPICALIZATION...........................................................................................................................................43
3.17
NUTS, BOLTS, STUDS, AND WASHERS ........................................................................................................44
3.18
RIVETS...............................................................................................................................................................44
3.19
FORGINGS ........................................................................................................................................................45
3.20
CASTINGS .........................................................................................................................................................45
3.21
WELDING...........................................................................................................................................................45
3.22
GALVANIZED WORK........................................................................................................................................45
3.23
PIPE WORK AND VALVES...............................................................................................................................46
3.24
OIL OR COMPOUND FILLED CHAMBERS......................................................................................................48
3.25
OIL LEVEL INDICATORS..................................................................................................................................48
3.26
THERMOMETER POCKETS .............................................................................................................................48
3.27
CHROMIUM PLATING.......................................................................................................................................49
3.28
PRESSURE GAUGES .......................................................................................................................................49
3.29
SMALL WIRING.................................................................................................................................................49
3.30
TERMINAL BOARDS ........................................................................................................................................51
3.31
ELECTRICAL INSULATION..............................................................................................................................52
3.32
EARTHING CONNECTIONS .............................................................................................................................53
3.33
ELECTRIC MOTORS .........................................................................................................................................53
3.34
CONTROL SWITCHES AND PUSHBUTTONS.................................................................................................54
3.35
INDICATING LAMPS AND FITTING .................................................................................................................55
3.36
AUXILIARY SWITCHES ....................................................................................................................................55
3.37
ENCLOSURES OF APPARATUS, HEATERS, AND VENTILATORS ..............................................................55
3.38
INSULATING OIL, COMPOUND AND GAS......................................................................................................56
3.39
CABLE BOXES AND CABLE BOX ACCESSORIES .......................................................................................56
4.
INSTALLATION ACTIVITIES ........................................................................................................................................58 4.1
UNLOADING AND STORAGE AT SITE............................................................................................................58
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
4.2
ERECTION AND CHECKING AT SITE .............................................................................................................58
4.3
CLEANING OF SITE..........................................................................................................................................58
4.4
ABNORMAL WORKING TIME ..........................................................................................................................58
4.5
CONTRACTOR'S AND SUB-CONTRACTOR'S STAFF ...................................................................................59
4.6
SAFETY FOR WORKMEN AND PUBLIC .........................................................................................................60
4.7
SAFETY RULES, CLEARANCE CERTIFICATES, AND PERMITS TO WORK ...............................................61
4.8
TAKING OVER CERTIFICATES .......................................................................................................................61
4.9
ACCESS TO SITE..............................................................................................................................................61
4.10
DAY WORK........................................................................................................................................................62
4.11
SITE REGISTER OF LIFTING TACKLE............................................................................................................62
4.12
SITE SERVICES ................................................................................................................................................62
4.13
TRAINING OF THE PURCHASER'S PERSONNEL..........................................................................................65
4.14
EXAMINATION OF WORK BEFORE COVERING UP ......................................................................................65
4.15
SYSTEM OF WORKS AND COOPERATION WITH OTHER CONTRACTORS AT SITE ................................65
132kV SF6 GAS INSULATED SWITCHGEAR ..............................................................................................................67
5. 5.1
TYPE OF SWITCHGEAR AND GENERAL REQUIREMENTS .........................................................................67
5.2
CURRENT RATINGS.........................................................................................................................................68
5.3
CONNECTIONS TO OUTGOING CIRCUITS.....................................................................................................68
5.4
DESIGN PRINCIPLES – 132 kV GIS SWITCHGEAR .......................................................................................68
5.5
SEALING ENDS.................................................................................................................................................74
5.6
LOCAL, REMOTE, AND SUPERVISORY CONTROL ......................................................................................76
5.7
CIRCUIT BREAKERS........................................................................................................................................77
5.8
LOCAL CONTROL CUBICLES .........................................................................................................................81
5.9
LOCKING FACILITIES ......................................................................................................................................81
5.10
ISOLATING AND EARTHING SWITCHES .......................................................................................................81
5.11
INTERLOCKING ................................................................................................................................................83
5.12
AUXILIARY SWITCHES AND CONTACTORS .................................................................................................84
5.13
CURRENT TRANSFORMERS...........................................................................................................................86
5.14
VOLTAGE TRANSFORMERS ...........................................................................................................................88
5.15
EARTHING SYSTEM .........................................................................................................................................89
5.16
SURGE ARRESTERS........................................................................................................................................89
5.17
GAS HANDLING EQUIPMENT .........................................................................................................................90
OUTDOOR SWITCHGEAR & EQUIPMENT .................................................................................................................92
6. 6.1
SWITCHGEAR - DESIGN AND PERFORMANCE ............................................................................................92
6.2
CLEARANCES...................................................................................................................................................92
6.3
RADIO INTERFERENCE ...................................................................................................................................92
6.4
CIRCUIT-BREAKERS........................................................................................................................................92
6.5
CURRENT AND VOLTAGE TRANSFORMERS................................................................................................98
6.6
SURGE ARRESTERS......................................................................................................................................102
6.7
ISOLATORS AND EARTH SWITCHES ..........................................................................................................103
6.8
OUTDOOR BUSBARS ....................................................................................................................................108
6.9
STEEL STRUCTURES ....................................................................................................................................113 SUBSTATION AUTOMATION SYSTEM.....................................................................................................................120
7. 7.1
SCOPE .............................................................................................................................................................120
7.2
DEFINITIONS...................................................................................................................................................120
7.3
ABBREVIATIONS............................................................................................................................................123
7.4
GENERAL REQUIREMENTS ..........................................................................................................................124
7.5
SYSTEM STRUCTURE....................................................................................................................................127
7.6
NETWORK CONTROL CENTRE COMMUNICATION ....................................................................................129
7.7
SYSTEM REQUIREMENTS.............................................................................................................................130
7.8
LOGICAL NODES............................................................................................................................................131
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
7.9
STATION CONTROL UNIT..............................................................................................................................141
7.10
OPERATOR CONSOLE ..................................................................................................................................143
7.11
BAY UNITS ......................................................................................................................................................147
7.12
SWITCHGEAR INTERLOCKING SYSTEM.....................................................................................................151
7.13
ENGINEERING PC AND SOFTWARE ............................................................................................................152
CONTROL AND RELAY PANELS FOR NON-AUTOMATED SUBSTATIONS ..........................................................153
8. 8.1
ARRANGEMENT OF FACILITIES...................................................................................................................153
8.2
CONSTRUCTION OF CUBICLES ...................................................................................................................153
8.3
CONTROLS .....................................................................................................................................................155
8.4
INDICATIONS ..................................................................................................................................................157
8.5
SUPERVISION RELAYS .................................................................................................................................157
8.6
BUSBAR VOLTAGE SELECTION ..................................................................................................................158
8.7
SYNCHRONISING ...........................................................................................................................................159
8.8
INDICATING LAMPS .......................................................................................................................................160
8.9
ALARM SCHEMES..........................................................................................................................................161
8.10
RELAYS, MINIATURE CIRCUIT-BREAKERS AND FUSES ..........................................................................162
8.11
INSTRUMENTS................................................................................................................................................163
8.12
CABLE TERMINATIONS.................................................................................................................................164
8.13
TESTING FACILITIES .....................................................................................................................................164
8.14
EARTHING.......................................................................................................................................................164
8.15
SUPERVISORY CONTROL AND TELEMETERING CABINETS....................................................................165
8.16
MULTICORE CABLES AND SCHEMATIC DIAGRAMS.................................................................................166
8.17
TRANSDUCERS ..............................................................................................................................................166
PROTECTIVE EQUIPMENT........................................................................................................................................169
9. 9.1
General ............................................................................................................................................................169
9.2
Protective IEDs ...............................................................................................................................................169
9.3
Test and Earthing Facilities...........................................................................................................................174
9.4
132 kV Feeder Protection...............................................................................................................................175
9.5
Transformer Protection..................................................................................................................................180
9.6
132 kV Busbar and Circuit Breaker Fail Protection.....................................................................................183
9.7
Auto-Reclosing Function ...............................................................................................................................184
9.8
Synchronizing Check Function .....................................................................................................................185
9.9
Intertrip Send/Receive Teleprotection Equipment ......................................................................................186
9.10
Tripping Relays...............................................................................................................................................186
9.11
Trip Circuit Supervision Schemes ................................................................................................................187
9.12
Segregation.....................................................................................................................................................187
9.13
22-11 kV Feeder Protection ...........................................................................................................................187 MEDIUM VOLTAGE GAS INSULATED SWITCHGEAR DESIGN AND PERFORMANCE ...................................190
10. 10.1
SWITCHGEAR TYPE.......................................................................................................................................190
10.2
CURRENT RATINGS.......................................................................................................................................190
10.3
DESIGN AND CONTRUCTION .......................................................................................................................190
10.4
COMPARTMENTS CONTAINING SF6 ............................................................................................................191
10.5
COMPARTMENT COUPLINGS .......................................................................................................................191
10.6
CIRCUIT BREAKER COMPARTMENT ...........................................................................................................191
10.7
OPERATING MECHANISM .............................................................................................................................192
10.8
ISOLATING FACILITIES .................................................................................................................................193
10.9
EARTHING FACILITIES ..................................................................................................................................193
10.10
GENERAL REQUIREMENTS FOR FAULT-MAKING EARTHING SWITCHES .............................................193
10.11
EARTHING OF METAL PARTS ......................................................................................................................194
10.12
CABLE CONNECTION ....................................................................................................................................194
10.13
CURRENT TRANSFORMERS.........................................................................................................................194
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
10.14
VOLTAGE TRANSFORMERS .........................................................................................................................195
10.15
CAPACITIVE VOLTAGE DETECTION SYSTEM............................................................................................196
10.16
SWITCHGEAR ENCLOSURE .........................................................................................................................196
10.17
INTERLOCKS AND CONTROLS ....................................................................................................................197
10.18
LOCKING FACILITIES ....................................................................................................................................197
10.19
AUXILIARY SWITCHES AND CONTACTORS ...............................................................................................197
10.20
BUSBARS AND CONNECTIONS ...................................................................................................................198
10.21
CIRCUIT LABELS............................................................................................................................................198
11.
POWER AND EARTHING TRANSFORMERS.......................................................................................................199 11.1
GENERAL ........................................................................................................................................................199
11.2
MAGNETIC CIRCUIT AND WINDINGS...........................................................................................................204
11.3
TANKS .............................................................................................................................................................206
11.4
COOLING PLANT............................................................................................................................................210
11.5
VOLTAGE CONTROL .....................................................................................................................................212
11.6
TERMINAL BUSHINGS ...................................................................................................................................215
11.7
CABLES AND TERMINATIONS......................................................................................................................217
11.8
TEMPERATURE AND ALARM DEVICES AND MARSHALLING CUBICLES ...............................................217
11.9
DRYING OUT ...................................................................................................................................................220
11.10
OIL....................................................................................................................................................................221
11.11
EARTHING AND AUXILIARY TRANSFORMERS ..........................................................................................222 STATION DC EQUIPMENT....................................................................................................................................225
12. 12.1
BATTERY CELLS............................................................................................................................................225
12.2
BATTERY MOUNTING, CONNECTIONS, AND ACCESSORIES...................................................................227
12.3
DC CONTROL & CHARGING EQUIPMENT ...................................................................................................228
12.4
DC DISTRIBUTION SWITCHBOARDS ...........................................................................................................235 POWER AND MULTICORE/MULTIPAIR CABLES UP TO 132kV........................................................................238
13. 13.1
GENERAL ........................................................................................................................................................238
13.2
132/66kV XLPE INSULATED POWER CABLES............................................................................................243
13.3
22 kV XLPE INSULATED POWER CABLES..................................................................................................248
13.4
AUXILIARY POWER AND MULTICORE CABLES UPTO 1.000 V ................................................................248
13.5
MULTIPAIR CABLES ......................................................................................................................................250
13.6
INSTALLATION OF CABLES AND ACCESSORIES WITHIN THE SUBSTATION BUILDING.....................251
13.7
EXCAVATION OF TRENCHES AND ANCILLARY EARTHWORKS IN TRANSMISSION SUBSTATIONS..253
13.8
TERMINATION OF AUXILIARY CABLES AND IDENTIFICATION OF CORES ............................................261
13.9
TERMINATION OF CONTROL CABLE SCREENS ........................................................................................261
13.10
TERMINAL COLOURING AND LABELLING..................................................................................................261
13.11
TERMINAL BOXES AND CABLE MARSHALLING KIOSKS .........................................................................261
13.12
DRAWINGS......................................................................................................................................................263 LV AC SWITCHBOARD .........................................................................................................................................265
14. 14.1
GENERAL CONSTRUCTION ..........................................................................................................................265
14.2
RATINGS .........................................................................................................................................................265
14.3
MAIN BUS-BARS ............................................................................................................................................266
14.4
TEMPERATURE RISE.....................................................................................................................................266
14.5
CONSTRUCTION OF ENCLOSURE ...............................................................................................................266
14.6
LV CIRCUIT BREAKERS ................................................................................................................................267
14.7
INSTRUMENTS................................................................................................................................................269
14.8
CURRENT TRANSFORMERS.........................................................................................................................269
14.9
TERMINATION CABLES.................................................................................................................................270
14.10
EARTHING.......................................................................................................................................................270
14.11
INCOMING SUPPLY CIRCUIT BREAKERS CONTROL AND INTERLOCK SCHEME .................................270
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
SUBSTATION EARTHING .....................................................................................................................................272
15. 15.1
GENERAL ........................................................................................................................................................272
15.2
BASIS OF DESIGN..........................................................................................................................................272
15.3
EARTHING OF EQUIPMENT ..........................................................................................................................272
15.4
JOINTS AND BRANCHES ..............................................................................................................................272
15.5
GUARDS ..........................................................................................................................................................273 FIBER OPTIC SYSTEMS .......................................................................................................................................274
16. 16.1
GENERAL ........................................................................................................................................................274
16.2
OPTICAL FIBERS............................................................................................................................................274
16.3
FIBER JOINTS.................................................................................................................................................276
16.4
TERMINATION CABLES.................................................................................................................................276
16.5
TESTING ..........................................................................................................................................................277 INSPECTION AND TESTING.................................................................................................................................278
17. 17.1 17.2
SUB-CONTRACTORS .....................................................................................................................................278
17.3
MATERIAL TESTS ..........................................................................................................................................279
17.4
WORKS TESTS - GENERAL REQUIREMENTS ............................................................................................279
17.5
SITE TESTS - GENERAL REQUIREMENTS ..................................................................................................280
17.6
TEST CERTIFICATES .....................................................................................................................................281
17.7
REJECTION OF PLANT ..................................................................................................................................282
17.8
LIST OF TESTS ...............................................................................................................................................282
17.9
INSPECTION PLAN AND PROCEDURES......................................................................................................303 ITEMS OF EQUIPMENT.........................................................................................................................................305
18.
19.
GENERAL REQUIREMENTS ..........................................................................................................................278
18.1
132 and 66kV OUTDOOR TYPE SWITCHGEAR ...........................................................................................305
18.2
METAL ENCLOSED GIS SWITCHGEAR .......................................................................................................310
18.3
Current and Voltage Transformers ...............................................................................................................314
18.4
POWER AND EARTHING TRANSFORMERS ................................................................................................317
18.5
22 kV SWITCHGEAR.......................................................................................................................................321
18.6
PROTECTION AND CONTROL CUBICLES ...................................................................................................330
18.7
SUBSTATION AUTOMATION SYSTEM .........................................................................................................335
18.8
REMOTE CONTROL CUBICLES AND PANELS............................................................................................336
18.9
SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) SIGNALS ...............................................345
18.10
MAIN AND AUXILIARY POWER AND MULTICORE CABLES......................................................................358
18.11
LV AC DISTRIBUTION BOARD ......................................................................................................................360
18.12
SUBSTATION DC EQUIPMENT......................................................................................................................360
18.13
FIRE EXTINGUISHERS ...................................................................................................................................362
18.14
AMBIENT TEMPERATURE SENSORS ..........................................................................................................363 SPECIFICATION DRAWING LIST .........................................................................................................................364
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
1. 1.1
SCOPE GENERAL
This specification includes the design, manufacture, inspection and testing at maker's works, packing for export shipment and delivery of 132kV, 66kV and 22kV switchgear and ancillary equipment. When specified it also includes erection and commissioning. The Contractor is responsible for making good defective material within the guarantee period. The Contract provides for all parts of the work to be completed in every respect for commercial operation to the requirements of the Engineer not withstanding that any details, accessories, etc. required for the complete installation and satisfactory operation of the Plant are not specifically mentioned in the Specification, such details are to be considered as included in the Contract Price. Test requirements and test methods are included which are intended to demonstrate the capability of the offered equipment and their compliance to the declared values in the Schedules of Particulars that are attached to this document.
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
2. 2.1
REFERENCES NORMATIVE REFERENCES
This specification incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate place in the text and the publications are listed in paragraph 2.3 below. For a dated reference, only the cited edition applies: any subsequent amendments to or revisions of the publication apply to this specification only when incorporated in the reference by amendment or revision. For undated references, any amendments to, or the latest edition of, the cited publication applies.
2.2
INFORMATIVE REFERENCES
This specification refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of the standard are listed in the paragraph below, but reference should be made to the latest editions.
2.3
LIST OF REFERENCES
Normative references
EN 197-1
Cement. Composition, specifications and conformity criteria for common cements
EN 729
Quality requirements for welding. Fusion welding of metallic materials
EN 755
Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles.
EN 837
Pressure gauges. Bourdon tube pressure gauges. Dimensions, metrology, requirements and testing
EN 1435
Non-destructive examination of welds. Radiographic examination of welded joints
EN 1559
Founding. Technical conditions of delivery
EN 1780
Aluminium and aluminium alloys. Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings
EN 1977
Copper and copper alloys. Copper drawing stock (wire rod)
EN 10025
Hot rolled products of non-alloy structural steels. Technical delivery conditions
EN 10027
Designation systems for steels
EN 10029
Specification for tolerances on dimensions, shape and mass for hot rolled steel plates 3 mm thick or above
EN 10113
Hot-rolled products in weldable fine grain structural steels
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
EN 10137
Plates and wide flats made of high yield strength structural steels in the quenched and tempered or precipitation hardened conditions
EN 10143
Continuously hot-dip metal coated steel sheet and strip. Tolerances on dimensions and shape
EN 10147
Continuously hot-dip zinc coated structural steel sheet and strip. Technical delivery conditions.
EN 10155
Structural steels with improved atmospheric corrosion resistance. Technical delivery conditions
EN 10210
Hot finished structural hollow sections of non-alloy and fine grain structural steels. Technical delivery requirements
EN 10220
Seamless and welded steel tubes. Dimensions and masses per unit length
EN 10244
Steel wire and wire products. Non-ferrous metallic coatings on steel wire. Zinc or zinc alloy coatings
EN 12540
Corrosion protection of metals. Electrodeposited coatings of nickel, nickel plus chromium, copper plus nickel and copper plus nickel plus chromium
EN 50052
Specification for high-voltage switchgear and controlgear for industrial use. Cast aluminium alloy enclosures for gas filled highvoltage switchgear and control gear
EN 50064
Specification for wrought aluminium and aluminium alloy enclosures for gas-filled high-voltage switchgear and control gear
EN 50068
Specification for wrought steel enclosures for gas filled high voltage switchgear and controlgear
EN 50069
Specification for welded composite enclosures of cast and wrought aluminium alloys for gas filled high voltage switchgear and controlgear
EN 50081
Electromagnetic compatibility
EN 50089
Specification for cast resin partitions for metal-enclosed gas filled high-voltage switchgear and controlgear
EN 50178
Electronic equipment for use in power installations
EN 50262
Metric cable glands for electrical installations
EN 50265
Common test methods for cables under fire conditions. Test for resistance to vertical flame propagation for a single insulated conductor or cable
EN 50266
Common test methods for cables under fire conditions
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
EN 50299
Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5kV to 550kV
EN 60034
Rotating electrical machines
EN 60044 – 1
Instrument transformers. Current transformers
EN 60044 – 2
Instrument transformers. Inductive voltage transformers
EN 60044 – 3
Instrument transformers. Combined transformers
EN 60044 – 4
Instrument transformers. Method for measuring partial discharges in instrument transformers
EN 60044 – 5
Instrument transformers. Capacitor voltage transformers
EN 60044 – 6
Instrument transformers. Requirements for protective current transformers for transient performance
EN 60044 – 7
Instrument transformers. Electronic voltage transformers
EN 60044 – 8
Instrument transformers. Electronic current transformers
EN 60051
Direct acting indicating analogue electrical measuring instruments and their accessories
EN 60068
Environmental testing
EN 60073
Basic and safety principles of man-machine interface, marking and identification. Coding principles for indicators and actuators
EN 60076
Power transformers
EN 60099 – 1
Surge arresters. Non-linear resistor type gapped surge arresters for a.c. systems
EN 60099 – 4
Surge arresters. Metal-oxide surge arresters without gaps for a.c. systems
EN 60099 – 5
Surge arresters. Selection and application recommendations
EN 60137
Insulated bushings for alternating voltages above 1kV
EN 60146
Semiconductor convertors
EN 60168
Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than 1000V
EN 60214
On-load tap-changers
EN 60255
Electrical Protection relays
EN 60269
Low-voltage fuses
EN 60289
Reactors
EN 60296
Fluids for electrotechnical applications – Unused mineral insulating
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
oils for transformers and switchgear EN 60372
Locking devices for ball and socket couplings of string insulator units. Dimensions and tests.
EN 60383 – 1
Insulators for overhead lines with a nominal voltage above 1000 V. Ceramic or glass insulator units for a.c. systems. Definitions, test methods and acceptance criteria.
EN 60383 – 2
Insulators for overhead lines with a nominal voltage above 1000 V. Insulator strings and insulator sets for a.c. systems. Definitions, test methods and acceptance criteria
EN 60439
Specification for low-voltage switchgear and controlgear assemblies
EN 60529
Specification for degrees of protection provided by enclosures (IP code)
EN 60599
Mineral oil-impregnated electrical equipment in service. Guide to the interpretation of dissolved and free gases analysis
EN 60617
Graphical symbols for diagrams
EN 60618
Inductive voltage dividers
EN 60623
Secondary cells and batteries containing alkaline or other non-acid electrolytes. Vented nickel-cadmium prismatic rechargeable single cells
EN 60672
Ceramic and glass insulating materials
EN 60688
Electrical measuring transducers for converting a.c. electrical quantities to analogue or digital signals
EN 60793
Optical fibres. Measurement methods and test procedures
EN 60811
Insulating and sheathing materials of electric cables. Common test methods
EN 60898
Specification for circuit-breakers for overcurrent protection for household and similar installations
EN 60947
Specification for low-voltage switchgear and controlgear
EN 61000-4-3
Electromagnetic compatibility (EMC). Testing and measurement techniques. Radiated, radio-frequency, electromagnetic field immunity test
EN 61082
Preparation of documents used in electrotechnology
EN 61131
Programmable controllers
EN 62155
Hollow pressurised and unpressurised ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000 V
EN 62271 - 1
Common specifications for high voltage switchgear and controlgear
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
standards EN 62271 - 100
High-voltage switchgear and controlgear. High-voltage alternatingcurrent circuit-breakers
EN 62271 - 102
High voltage switchgear and controlgear. High-voltage alternating current disconnectors and earthing switches
EN 62271 - 103
Specification for high-voltage switches. Switches for rated voltages above 1 kV and less than 52 kV
EN 62271 - 104
Specification for high-voltage switches. High-voltage switches for rated voltage of 52 kV and above
EN 62271 - 106
High-voltage alternating current contactors and contactor-based motor starters
EN 62271 - 200
A.C. metal-enclosed switchgear an controlgear for rated voltages above 1 kV and less than 52 kV
EN 62271 - 203
Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above
EN 62271 - 209
Cable connections for gas-insulated metal-enclosed switchgear for rated voltages above 52 kV. Fluid-filled and extruded insulation cables. Fluid-filled and dry-type cable-terminations
EN 62271 - 305
Cable connections for gas-insulated metal-enclosed switchgear for rated voltages of 72,5kV and above – Fluid-filled and extruded insulation cables – Fluid-filed and dry type cable-terminations
EN 81346
Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations
EN ISO 216
Writing paper and certain classes of printed matter. Trimmed sizes. A and B series
EN ISO 1461
Hot dip galvanized coatings on fabricated iron and steel articles. Specifications and test methods
EN ISO 4589
Plastics. Determination of burning behaviour by oxygen index
EN ISO 5455
Technical drawings. Scales
EN ISO 12944
Paints and varnishes. Corrosion protection of steel structures by protective paint systems
EN ISO 14713
Protection against corrosion of iron and steel in structures. Zinc and aluminium coatings. Guidelines
IEC 60085
Thermal evaluation and classification of electrical insulation
IEC 60120
Dimensions of ball and socket couplings of string insulator units.
IEC 60228
Conductors of insulated cables
IEC 60229
Electric cables - Tests on extruded oversheaths with a special
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protective function IEC 60273
Characteristic of indoor and outdoor insulators for systems with nominal voltage greater than 1000V
IEC 60332
Tests on electric cables under fire conditions
IEC 60354
Guide to loading of oil-immersed power transformers
IEC 60376
Specification and acceptance of new sulphur hexafluoride
IEC 60376A
First supplement: Section thirteen Mineral Oil Content
IEC 60376B
Second supplement - Clause 26 Specification and acceptance of new sulphur hexafluoride
IEC 60480
Guide to the checking of sulphur hexafluoride (SF6) taken from electrical equipment
IEC 60502
Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV)
IEC 60815
Guide for the selection of insulators in respect of polluted conditions.
IEC 60840
Power cables with extruded insulation and their accessories for rated voltages above 30kV (Um = 36kV) up to 150kV (Um = 170kV) – Test methods and requirements
IEC 61109
Composite insulators for a.c. overhead lines with a nominal voltage greater than 1000 V - Definitions, test methods and acceptance criteria
IEC 61850
Communication networks and systems in substations
ISO 1000
Specification for SI units and recommendations for the use of their multiples and of certain other units
BS B 24
Specification for copper-tin-phosphorous alloy rods and sections
BS 61
Specification for threads for light gauge copper tubes and fittings
BS 159
Specification for high-voltage busbars and busbar connections
BS 215
Specification for aluminium conductors and aluminium conductors, steel reinforced for overhead power transmission.
BS 381C
Specification for colours for identification, coding and special purposes
BS 1133
Packaging Code
BS 1376
Specification for colours of light signals
BS 1858
Electric cables. Accessories. Bitumen-based filling compounds
BS 2484
Specification for straight concrete and clayware cable covers
BS 2562
Specification for cable boxes for transformers and reactors
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BS 2569
Specification for sprayed metal coatings. Protection of iron and steel against corrosion and oxidation at elevated temperatures
BS 2765
Specification for dimensions of temperature detecting elements and corresponding pockets
BS 2950
Specification. Cartridge fuse-links for telecommunication and light electrical apparatus
BS 3288
Insulator and conductor fittings for overhead power lines
BS 3643
ISO metric screw threads
BS 3692
ISO metric precision hexagon bolts, screws and nuts. Specification
BS 3941
Specification for voltage transformers
BS 4190
ISO metric black hexagon bolts, screws and nuts. Specification
BS 4504
Circular flanges for pipes, valves and fittings (PN designated)
BS 4872
Specification for approval testing of welders when welding procedure approval is not required
BS 5000
Specification for rotating electrical machines of particular types or for particular applications
BS 5207
Specification for sulphur hexafluoride for electrical equipment
BS 5308
Instrumentation cables
BS 5467
Specification for 600/1000 V and 1900/3300 V armoured electric cables having thermosetting insulation
BS 6121
Mechanical cable glands.
BS 6231
Specification for PVC-insulated cables for switchgear and controlgear wiring
BS 6346
Specification for 600/1000 V and 1900/3300 V armoured electric cables having PVC insulation
BS 6360
Specification for conductors in insulated cables and cords
BS 6399
Loading for buildings
BS 6622
Specification for cables with extruded cross-linked polyethylene or ethylene propylene rubber insulation for rated voltages from 3.8/6.6 kV up to 19/33 kV
BS 6724
Specification for 600/1000 V and 1900/3300 V armoured electric cables having thermosetting insulation and low emission of smoke and corrosive gases when affected by fire
BS 7207
Specification for crude vegetable fats
BS 7354
Code of practice for design of high-voltage open terminal stations
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BS 7430
Code of practice for earthing
BS 7655
Specification for insulating and sheathing materials for cables
BS 7668
Specification for weldable structural steels. Hot finished structural hollow sections in weather resistant steels
BS 7884
Specification for copper and copper-cadmium stranded conductors for overhead electric traction and power transmission systems
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
3. 3.1 3.1.1
GENERAL TECHNICAL REQUIREMENTS DESIGN CRITERIA Site Operating Conditions
The climate is sub-tropical and the following meteorological information is set out for guidance only. No responsibility or any claims based on this information will be accepted. Nevertheless, the values given below shall be taken into account in designing the works. 1
Altitude of sites above sea level:
Below 1000m
2
Maximum outdoor ambient shade or indoor temperature for design purposes:
50 oC
3
Minimum temperature:
-5 oC
4
Relative humidity:
100 %
5
Thunderstorms per year:
30
6
Number of strokes to earth per km2 per year:
4
7
Earthquake loading for design purposes:
Refer to Clause 3.1.9
8
Wind Speed/pressure for design purposes
40 m/s at 10m / 575 N/m²
9
Condition of atmosphere
Occasionally dust and salt laden
For current rating calculations of busbars and busbar connections the following assumptions shall be made: Copper 1
Maximum operating temperatures
2
Wind speed
3
Aluminium
Refer to Clause 6.8.1 m/sec
0,6
0,6
Emissivity factor
0.5
0,6
4
Absorption factor
0,5
0,6
5
Solar radiation
1050
1050
3.1.2
W/m2
General Design Information
Phase Rotation and Colour-Phases shall be distinguished as Brown (L1), Black (L2), and Grey (L3) with phases reaching their maximum values in that order in an anti-clockwise rotation.
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
1
Nominal system voltage between phases (kV)
220
132
66
22/11
2
Rated voltage (kV)
245
145
72,5
24/12
3
Nominal system voltage variation (%)
+/-6
-
+10/-6
4
System nominal Frequency (Hz)
5
System nominal Frequency range(Hz)
49,5-50,5
6
System Frequency range during disturbances(Hz)
47,0-52,0
7
Rated short-circuit and throughfault capability, Vassilikos, Dhekelia and Moni S/S
40kA for 1s
40kA for 1s
25 kA for 1s
20kA for 3 s
50 kA for 1s
8
Rated short-circuit and throughfault capability, other Substations
31,5kA for 1s
31,5kA for 1s
25 kA for 1s
20kA for 3 s
50 kA for 1s
9
DC time constant at rated shortcircuit breaking current
45ms
45ms
45ms
45ms
45ms
10
DC time constant at rated shortcircuit breaking current generator circuit breakers
+/-10
0,400
50
318ms
Solid Earthing
Solid Earthing of the 22/11kV neutral or of zigzag earthing transfor mer
11
Earthing of System
12
AC supply voltage for auxiliary equipment
400/230 Vac ±10%
13
DC supply voltage for auxiliary equipment
110 Vdc 2-wire
14
Closing
110 Vdc
15
Tripping
110 Vdc
16
Initiating power supply for indications and alarms
110 Vdc
DC voltages stated are nominal battery voltages and due allowance shall be made for all connected equipment to operate safely when batteries are under normal float charge or boost charge conditions.
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EAC SPEC 14-019, Issue 9 Dated 03-05-2010
The equipment provided under this Contract is to be capable of operating reliably within the following voltage ranges: (a) DC Equipment: From 80% nominal voltage up to 110% nominal voltage (125 V for 110 V DC supply). (b) AC Equipment: From 80% nominal voltage up to 110% nominal voltage.
3.1.3
Co-ordination of Substation Insulation
1
Nominal system voltage (kV)
220
132
66
22
11
2
Rated system voltage (kV)
245
145
72
24
12
3
Assumed highest switching surge
4
Impulse withstand voltage (1,2/50 μsec) (kV)
950
650
325
125
75
5
Impulse withstand voltage (1,2/50 μsec) for transformers (kV)
750
550
325
125
95
6
Power frequency withstand voltage (1 min) (kV)
395
275
140
50
28
7
Impulse withstand level of isolator gap
8
Minimum external creepage distance (mm)
9
Minimum substation clearances (Outdoor Equipment):
Not greater than 3:1
115% of rated insulation level 7700
4620
2310
770
385
•
Phase to earth (mm)
2100
1270
685
279
200
•
Phase to phase (mm)
2400
1473
786
330
250
•
Between terminal of same phase (mm)
1783
1473
786
330
250
•
Finished concrete level to base of post insulator (mm)
2440
2440
2440
2440
2440
•
Section (mm)
4250
3500
3050
2590
2590
•
Height from ground to the nearest unscreened live conductor in air (mm)
3530
3530
3530
3530
3530
Note 1: The above clearances are applicable only to equipment not subject to impulse voltage tests. They apply for conditions of maximum swing and sag. Note 2: The minimum creepage distance measured from the metal cap to the base over the surface of the insulator shed (expressed in millimetres per unit of nominal voltage
132kV Outdoor GIS Substations and Ancillary Equipment_Specification.doc
Page 18 of 365
EAC SPEC 14-019, Issue 9 Dated 03-05-2010
between phases) shall not be less than 35mm per kV (nominal voltage) for outdoor insulators. The minimum protected creepage distance shall not be less than thirty five per cent of the total creepage distance. The protected creepage distance refers to that part of the insulator, which is protected against rain at right angles to the axis of the bushing. If the use of "Anti-fog" or "Anti-pollution" type or other insulators with deep sheds or skirts is intended the Tenderer shall include a description and fully dimensioned drawing of the insulators..
3.1.4
Surge Arrester Basic Requirements
1
Nominal discharge current
10kA crest
2
Line discharge class as per EN 60099-4
3
3
Discharge Current Withstands
4
• High Current 4/10 μs
100kA crest
• Low Current 2000 μs (minimum)
700A crest
Housing
3.1.5
Polymeric
Minimum Factors of Safety for Outdoor Switchgear and Equipment
1
Busbar or other connections based on elastic limit or 0.1% proof stress:
2,5
2
Complete insulator units based on mechanical test:
2,5
3
Insulator metal fittings based on elastic limit:
2,5
4
Steel structures based on elastic limit of tension members and on crippling loads of compression members:
2,5
5
Foundations for structures against overturning or up-rooting under maximum simultaneous working loading:
2,5
3.1.6
Characteristics of Associated Transmission Lines
1
Normal transmission voltage between phases (kV)
220
132
2
Wet power frequency withstand voltage (kV)
395
275
3
Dry lightning impulse withstand voltage (kV)
950
650
Phase conductor
Phase conductor
Earthwire
13,5 kN
9 kN
4
Maximum tension in each line conductor on the substation landing gantry (kN)
40 kN
5
220 kV feeders
Rubus
132kV Outdoor GIS Substations and Ancillary Equipment_Specification.doc
OPGW
Page 19 of 365
EAC SPEC 14-019, Issue 9 Dated 03-05-2010
6
220 kV feeders but operated 132 kV
7
132 kV feeders
UPAS or Parakeet
Willow or OPGW
8
132 kV feeders but operated 66 kV
UPAS or Parakeet
Willow or OPGW
9
Number of circuits per tower
2
2
10
Number of phase conductors per circuit
2
1
11
Number of earthwires
1
1
12
Typical impedance values:
3.1.7
Rubus
OPGW
•
Positive sequence (Z1)
N.A.
0,42 220kv
feeders/bays
1
100
220kv
feeders/bays
2
200
132kv
feeders/bays
3
300
66kv
feeders/bays
4
400
24-52kv
feeders/bays
5
500
22kv
feeders/Panels
6
600
11kv
feeders/Panels
7
700
1,2-10kv
feeders/Panels
8
800
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