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MINISTRY OF ELECTRICITY & WATER

SUPPLY AND INSTALLATION OF

PART- A- RAWDTAN "X" 300/132/11 KV SUBSTATION

PART- B- EXTENSION OF THE EXISTING 132KV SWITCHGEAR

AT SALMIYH"AX" 300/132/11 KV

.

PART- C : EXTENSION OF THE EXISTING 132KV SWITCHGEAR

AT SLWT "A" 132/33/11 KV

PREFACE

SPECIAL CONDITIONS AND NOTES

Attention of all tenderers is drawn to the following:

1. The prospective tenderers must submit their offers complete for the above parts of this tender. Partially submitted offers will not be accepted.

2. All the specified equipment and as detailed under this specification shall be fully in

compliance with the technical specification and which forms an integral part of this

tender.

3. All the electrical equipment and civil works shall be guaranteed for a period of one

year from the date of energizing (or as stated in Schedule A-1) against any failures,

faults, defects, poor workmanship and repairs, etc.

4. It is not allowed to change the Kuwaiti Agent from the closing date of tender till the

date of signing of the contract.

5. The tenderers are allowed to submit materials from sub-suppliers for only those items listed in Schedule "A-1*". Offers not complying with these conditions will be

rejected.

a. The main equipment shall be manufacturers from approved list in Schedule A- 1. Therefore the work in this equipment shall be under the direct supervision

of this manufacturer and should be included in the tender price.

b. The erection companies (non-manufacturers) are requested to extend the maintenance and guarantee periods for main equipment to three years instead

of one year.

c. The manufactures should submit their quotations to the erection companies two weeks prior to the closing date and their prices quoted to the erection

companies must be compatible with their prices offered to the ministry in case

they are participating in the same tender. Otherwise their offers can be

rejected if there is a big difference in their prices quoted to the erection

companies and the prices offered to Ministry or not submitting quotation to

the erection companies.

However, the erection companies must attach the manufactures quoted price with the tender.

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6. Every page of technical and price schedules must be signed and stamped by local agent and their principals.

7. Tenderers are advised to refer to Schedule "V" erection rates relating to interim payments and Schedule "E" for detailed drawings to be submitted with the offer

8. Materials made in Kuwait are acceptable provided they fully comply with these specifications.

9. For 300 KV switchgear SF6 tubing shall be provided for all feeder circuits from the switchgear to the outside of the wall of the switchgear room.

The above SF6 tubing shall be fitted with cable sealing ends suitable for single core,

300 KV 1600 mm. XLPE cables (2 per phase) as detailed in the Details of

Equipment.

Provision shall be made for cable testing, sun shielding, fire retardant, coating of

cables, fire zoning if required, all the above shall be subject to MEW approval.

The above cable sealing ends and arrangement outside the switchgear rooms walls is

referred to below as cable corridor. The 300 KV outdoor bushings shall comply with

the following:

- System highest voltage 300 KV

- Minimum creep age distance 10900 mm.

- Impulse withstand voltage 1.2/50 ms 1050 KV

10. The 132 KV XLPE 800 sq.mm. cable tails of the four 300 MVA transformer shall be

routed from the 132 KV SF6 sealing ends of the 132 KV switchgear under the

substation building and up to transformers rooms through PVC ducts. These ducts

shall be encased in concrete. The depth of ducts, construction, grouping of circuits,

etc. shall be subject to the purchasers approval. Tenderers are allowed to propose alternative route of these cables, this however if

accepted by the purchaser will not entitle the contractor for any extra charges to the

contract price.

11. If 33 KV circuit breakers are SF6 insulated are offered the tenderer should fill the

respective particulars and guarantees in Schedule D of this tender. However, SF6

C.Bs should comply with the requirements of clause 4.4. of Volume I. 12. For the new 11 KV switchgear, 11 KV circuit breakers shall be of the SF6 insulated or

vacuum type, switchgears with minimum oil circuit breakers are not acceptable. The

tenderers who wish to offer SF6 or vacuum circuit breakers shall submit with the offer

an evidence to show that the circuit breaker which they offer is from sub-suppliers

listed in Schedule A-1 and is in service for at least three years. The tenderers should

fill the respective particulars and guarantees in Schedule D of this tender with

complete and clear technical data. Also they have to attach with their offers technical

literature, description and instructions for operation and maintenance. However, the

offered circuit breakers should comply with the requirements of clause 4.4 of Vol. I.

At approval stage detailed calculations of the strength of the C.B. components shall be

subject to MINISTRY approval.

13. All tenderers are required to quote for equipment/materials manufactured abroad and

for equipment/materials manufactured locally by approved suppliers

The C.I.F. prices and other charges of these items to be entered in Schedule "J-1"

(column"3"+ column 4) shall be based on the cheapest of the above two makes (C.I.F.

price and other charges (FRANCO) for foreign make and ex-factory and transport to

stores prices for locally made items) and the total of Schedule "J-1" shall be carried

over to the Schedule "J-3" (Summary of Prices).

All tenderers should submit with their offer the original quotation as received from

local manufacturers. When quoting in Schedule "J-1" for locally manufactured

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equipment, the prices of "Other charges" in column "4" are to be filled for

"transportation cost from factory to stores.

14. All tenderers should note that when filling the price schedules, the requirements of Ministerial decree No.(6) of 1987. This applies to the locally manufactured equipment

and materials approved by MEW. For example: Gulf Cables (Kuwait) manufacturer of

PVC, XLPE insulated cables up to 11 KV and pilot cables and York Gulf

manufacturer of Air conditioning units and Al-Ahlia Co. manufacturer of relay and

control panels, L.T. distribution boards, battery chargers, 33 KV Switchgear and 11

KV Switchgear ,pilot cable marshaling cabinet , telemetry terminal transfer cabinet ,

transformer tap changer control panels and local control panels for 300 & 132 KV

switchgear and 20MVA 33/11.5KV and cast resin 11/0.433 KV transformer and

EBOMAC manufacturer of L.T. Distribution boards (A.C and D.C), 132 kV & 11 kV

Control & Relay panel, Telemetry Terminal Transfer Cabinet & Transformer tap

changer control panel and IPEC Co. manufacturer of relay and control panels, L.T.

distribution boards (AC & DC), pilot cable marshaling cabinet, telemetry terminal

transfer cabinet, transformer tap changer control panel.

The CIF prices and other charges for each of the items to be entered in Schedule J-1

shall be based on the cheapest of the above two makes (CIF price and other charges

for foreign make (FRANCO) and ex-factory and transport to stores prices for locally

made) taking into consideration the preferential percentage given to similar products

of national products and products of national origin given in Ministerial Decree No.

(6) of 1987. The total of Schedule J-1 shall be carried over to the Schedule J-3 Summary of prices.

15. This is for all tenderers that if they propose more than one supplier in Schedule A for the items mentioned in Schedule D, then the make and type mentioned in Schedule D

will be considered final, and in case more than one make and type are mentioned in

Schedule D for the same item, then the MINISTRY has the right to select one and

tenderer has to comply with MINISTRYs decision without any objection. Tenderers offers must not contradict with the decree No.6 for national products otherwise their offers will be rejected.

16. Tenderers are not allowed to retype and replace the original tender documents, non compliance to which will result in rejection of their offers.

17. All material type test certificates will be submitted where these are not available, type tests in accordance with specifications and in presence of our appointed

inspector shall be carried out with no extra cost.

18. Spare parts, tools and accessories that will be delivered shall be in accordance with

make/type finally installed in site and the prices of the same are to be actual for

future reference in case of order during contract running period until the end of

contract guarantee period.

19. If any material fails during the test as per the test report of our appointed inspector,

then such material shall be re-tested. Repeating the test for the same material for any

reason whatsoever (i.e. due to failure during test, material damaged for any reason)

will be on the contractor's account and to be deducted from your tender price and to

be paid for our appointed inspector.

20. If any Site test result show difference with factory test results and the variation is

beyond compliance with IEC the contractor will return the equipment to the factory

for a retest and submit a complete result report for MEW approval without any

additional cost.

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21. Supply & installation of telemetry equipment will be done by others. Accordingly all

the telemetry works which will be done by telemetry contractor to be coordinated

with substation contractor.

22. Training of five engineers from the Ministry for not less than 2 weeks in the Main

equipment Factory (for each of GIS, Transformers, Protection relays, Fire fighting and

Battery Chargers

23. The contractor shall submit for study and approval the relay settings calculation from

the relay manufacturer based on required parameters collected from MEW for each

substation in the project at least six (6) months before commission shall be

contractors own responsibility.

24. The contractor after successfully completing the substation will hand over all the

remaining articles of the following to MEW stores.

a. All left over cables, pcs. of power cables/control cables.

b. Empty or filled gas cylinders of Nitrogen, SF6 etc.

c. Metal beams Pcs of beams used for transportation of heavy items like

transformers, switchgear etc.

d. All empty packing cases (wooden, card board, etc) used for transportation of

parts and equipments.

e. Empty oil drums and tanks used for transformers oil etc.

25. Current transformers should preferably not be housed in SF6 circuit breaker chamber.

26. The necessary manpower has to be provided on the tenderers / contractors

sponsorship.

27. The contractor shall submit relays based on the latest version of digital / numerical relays

from MEW approval list. All protection relays to be provided under this project are to be

latest design and state of the art for which specific approval is to obtained from MEW

including Battery Chargers relays.

28. The contractor should submit 2 no. laptop with specified design to operate the above

protection relays & battery charger relays complete with original soft copy and all cable

connection, configuration setting, etc. These to be handed over to Maintenance

Department. In additional to the above 4 nos. of laptops with 6 nos. of softcopy and

hardcopy to be handed over to MEW.

29. Suitable Intelligent Digital Energy Meters measuring active & reactive energy calibrated

and sealed by MEW testing laboratory are to be provided for all transformers on LV side.

30. The contractor shall submit one original and three copies of all the relevant and latest IEC

standards for GIS and transformer and their components i.e. manufacturing, testing, etc.

Battery & battery chargers, L.T. equipment, firefighting and all other components. The

contractor shall update the above standards during the contract period and should submit

the new version of the same.

31. The contractor shall submit the Spare Parts lists (Schedule C) in soft copy & hard

copy during two months after the approval of the equipment, these spare parts have

been not handed over unless the contractor get a written request from MEW.

- The Ministry has the right to deduct the spare parts according to the requirement.

32. The contractor should submit technical details for MEW study and separate approval

for each of:-

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Gauges, terminal block, MCBs, bushings, instrument, pressure relief device,

Buchholz, free maintenance breather taking into consideration the slcagel material to

be grey color and not blue color, motor fans, motor pump, deluges valve showing the

name, place manufacture, transducer, battery charge, insulation level for any motor.

These materials to be good quality and have useful long life expectancy.

33. The approved power transformer tap changer to be vacuum type otherwise you have

to use filter system if the tap changer is oil type.

34. The tenderers should arrange the technical familiarization in detail and give lecture

for 12 engineers about IEC standards by specialist of IEC for 5 working days for each

of switchgear and transformers, this will be held in Kuwait and all expenses shall be

included in the tender price.

35. Contractor shall submit 10 major books for electrical power system.

36. Dummy panels for each of transformer and switchgear to be submitted to MEW

engineers during the approval stage.

37. The Ministry has the right to accept any contractor or subcontractor which complete

the prequalification conditions before the tender closing date.

38 - transformer oil used to be an inhibited insulating high class oil with extremely good

electrical and excellent ageing properties meeting IEC 60296 (03), special application

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DETAILS OF EQUIPMENT

SUPPLY AND INSTALLATION OF

RAWDTAN "X" 300/132/11 KV SUBSTATION

This substation shall consist mainly of the following:

1. Seventeen (17) bays 63 KA 275/300 KV double busbar totally enclosed, metal clad, SF6 gas insulated switchgear suitable for indoor installation in brick built building.

The switchgear shall be complete with operation cubicles, 300 KV SF6 tubing, and

isolators, earthling switches, voltage and current transformers, local control cubicles

and all accessories to complete.

2. Control board complete with one panel for synchronizing for the above 300 KV switchgear.

3. Relay board to accommodate the protective relays and digital disturbance recorders for the above gear.

4. Four (4) 300 MVA 300/132/33 KV power transformers with ON-LOAD tap changer 300 KV and 132 KV disconnecting link chambers suitable to receive 300 KV SF6

tubing and 132 KV XLPE on H.V. and L.V. sides respectively. The transformers

shall be of the star/star winding connection type with third tertiary winding. The

neutral of the H.V. side of the transformer shall be brought out through SF6 tubing

and shall be grounded through SF6 insulated switch which shall be installed in a

separate room in the substation. Current transformer for restricted earth fault shall

also be SF6 insulated. The neutral of the L.V. side of the transformer shall be

brought out via disconnecting link chamber, with oil immersed bolted copper link.

The current transformer for restricted earth fault protection at 132 KV side of the

transformer shall be of the ring type housed in a suitable sheet steel dust protected,

vermin proof, well ventilated box and provided with the necessary terminal block,

wiring etc. all to the satisfaction and approval of the purchaser. The H.V. side neutral shall also be provided with SF6 insulated lightning arrestors with detectors

and counters. The method proposed by the tenderers shall be clearly shown on the

drawings submitted with their offers and the cost of such shall be included in the

tender price. SF6 insulated earthing switches, C.T.s for REF protection, etc. shall be installed in a separate room of the substation, unless otherwise approved.

The surge arrestors and earth switch on H.V. side and link chamber on L.V. side

which are used for earthling of the 300 MVA transformers neutrals should be

connected to earth with adequate size of insulated cable or insulated copper bar

which shall be subject to the approval of the purchaser. Detailed calculations to

prove the adequacy of size insulation shall be submitted by the contractor for

approval purposes.

5. Four (4) numbers 45 MVAR shunt Reactors 6. 33KV switchgear, control and relay board for 4x45 MVAR shunt reactors. 7. Thirty-Four (34) bays 10.000MVA 132/145 KV double busbar totally enclosed,

metal clad,SF6 gas insulated switchgear suitable for indoor installation in brick built

building. The switchgear shall be complete with operation cubicles, 132 KV cable

end sealing boxes, and isolators, earthling switches, voltage and current

transformers, local control cubicles and all accessories to complete.

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8. Remote control and relay panels for the above 132 KV switchgear. 9. Thirty (30) panels, 750MVA 10. 40 KA at 11 KV indoor switchgear. 11. Remote control and relay panels for the 11 KV switchgear. 12. Four (4) 30 MVA, 132/11.5 KV power transformers with ON-LOAD tap-changers

three design for parallel operation, the fourth transformer is standby.

13. Tap change remote control panels for the above transformers. 14. four 8 ohms neutral earthling resistor and associated change over switch cabinets

with current transformers for REF and standby E/F protection.

15. Water fire fighting system for the above transformers and shunt reactors. 16. Two 750 KVA 11/0.433 KV cast resin station transformers. 17. Low voltage distribution board. 18. 2 Nos. 220 volts and one 110 volts batteries, associated charging, control equipment

and auxiliary D.C distribution boards.

19. All necessary control and power service cables for connections between all the substation equipment. This also covers cables for substation lighting, power sockets,

air conditioning and any other auxiliaries, inside or outside the substation building.

The price of all the necessary trays, racks, bridges, covers, etc. has to be included in the tender price.

1 KV single core 300 sq.mm. XLPE insulated PVC sheathed cable for connection

between L.T. board and wall mounted switch fuse for emergency diesel unit.

20. Station earthling system. 21. All transformers (300 MVA and 30 MVA & 750 KVA transformers) and 4x45

MVAR shunt reactors, power cables connecting the above transformers and shunt

reactors to their respective switchgears (132 KV, 33 KV, 11 KV and 1000 volts

cables).

22. All civil works associated with the substation (main building and external civil works).

23. Overhead traveling crane for the 300 KV and 132 KV switchgear rooms elec/ motors.

24. Air conditioning associated with the substation building for the 300 & 132 kV switchgear room, control room, office, communication room, one spare room and

battery charger room. Ventilation of the basement and battery rooms.

25. Lighting fittings, power outlet sockets, and building wiring installation inside and outside the substation buildings.

26. Substation fire fighting system (other than 14 above). It is to be noted that all wiring is required for substation fire fighting should be concealed.

27. Pilot cable marshalling cabinets for 11KV switchgear. 28. Substation special auxiliary and sundry equipment. 29. Support steel structures for power cable tails in the basement and at the transformer

side, this covers all incoming and outgoing and future circuits.

30. Supply and installation of transfer telemetry terminal blocks cabinets. 31. Feeder differential protective relays type Solker RN (5 KV & 15 KV insulation) M/s

Reyrolle are discontinuing manufacture of cable differential relay type "Solkor "R"

both 5 KV and 15 KV and instead producing new version of cable differential relay

called Solkor "RN" for both 5 KV and 15 KV insulation.

It is therefore required to provide Solkor "RF" relays instead of Solkor "R". This is

also applicable to Schedule -C- Spare Parts -.

For 11 KV feeder circuits the existing Solkor "R" 5 KV relays can be used with the

new type Solkor "N" relays by means of changing four links in front of the Solkor N

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(5 KV relay) to switch to R mode and these changes shall be carried out by the

contractor of this tender without any extra cost.

Meanwhile, for the far end of 132 KV feeder circuits, the existing Solkor R 15 KV

relay to be dismantled and handed over with proper packing to MINISTRY stores (if

necessary) and Solkor "RF" to be provided and installed instead of the dismantled

Solkor R.

32. Inter-trip equipment for 300 KV and 132KV feeders. 33. All the specified equipment and as detailed under this specification shall be fully in

compliance with the technical specifications and which form an integral part of this

tender.

34. Phosphoric self-shining tape to be supplied and wrapped around the cable at equally interval led distances.

35. Outdoor flood lighting (photo-electric cell controlled) on poles as erected inside the substation boundary wall at the four corners and shall be subject to MEW's approval.

36. The offer price must cover the cost of supply and installation to the satisfaction of MEWs Engineer, any minor items that may not be specifically mentioned such as clamps of various kinds, auxiliary relays and contactors, etc. which are necessary for

the completion of the project in a perfect manner. The contractor will not be entitled

to extra charges for such items or due to lack of knowledge. This also includes any

work or material for testing, tuning and commissioning the equipment at the far end

substation.

37. All necessary works for making of ducts using thrust boring method and/or open cut method for 6 and 8 or above UPVC ducts shall be carried out under the scope of

work of this tender.

38. It has been decided to use fiber optic cable instead of pilot cable for 300KV and 132KV systems, there for all the tenderers are requested to study these requirements

and include in their offers any interface equipment/ fiber optic compatible relays.

39. Under Frequency Load Shedding Relays are necessary in new and running substation projects for 300 & 400 kV level.

NB: 1) SF6 insulated, metal enclosed, metal oxide type surge arrestors shall be

provided for feeders and SF6 tubes. These arrestors shall be capable to protect

the HV equipments from lighting and switching surge. Further they shall be

designed to prevents any oscillating over voltage during normal/abnormal switching conditions. Such surge arrester shall be submitted for MEW

approval, supply and erection of the same to be included in the tender price

off the above substation.

Arrestors shall be designed and tested in accordance with requirements of

the relevant parts off IEC 60099 and in the case of zinc oxide arrestors they

shall be type tested in accordance with IEC 60099-4. Routine tests shall be

carried out in accordance with the requirements of this specification.

In additional to the above , the contractors shall study whether or not the

line arrestor located at the SF6 switchgear stations will fully protect the

transformers and switchgears against lighting surges and switching surges ,

the contractor shall perform the necessary calculations. If such calculations

reveal insufficient protection level then additional lighting arrestors directly

connected to the transformer, feeders and busbar tubs line terminals have to

be provided for the above substations without extra cost.

2) All cable ducts including feeder circuits inside and outside the substation

building and within the boundary wall shall be supplied and installed by the

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contractor and the price of such shall be included in the offer. The ducts for

the future circuits are included in this tender.

3) Stability test on Solkor RF for 132 KV spare feeder and 11 KV feeders are

not required to be carried out since far end equipment are not available.

4) Commissioning test for inter-trip equipment and relay setting of 132 KV

spare feeder are not required to be carried out since far end equipment are not

available

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Details of Equipment

1. 300 KV Switchgear:

1.1 : Bus bars :

Two sets

Of three phase main busbars of 3000 amps Kuwait rating extending over

Seventeen (17) bays complete with four sets of 3-phase busbar earthing

The above shall include all copper connections, piping, earthing connections, electrical

and mechanical interlocks, auxiliary switches, multi-core cable glands and all other items

necessary to complete including synchronizing facility. Galvanized Steel Supporting

Structure for 300 kV Cables with non-ferrous cable cleats and clamps shall be provided.

1.2 Ten (10) OHL Feeders Bays Nose: 1,3, 16,17 spare Bay no. 4 to SBPS Bay no. 5 to JAHR "AX" Bay no.14 to JAHR "AX" Bay no. 7 to RDTN "W"

Bay no.12 to RDTN "W

Bay no. 13 6 to SBPS

Each bay comprising:

Two sets 2000 amps 3-phase busbar connections complete.

One set

2000 amps three single phase 300 KV feeder isolator complete with

operating mechanism

Two sets 2000 amps three single phase 300 KV busbar selector switches

complete with operating mechanism

One set Feeder earthing switch complete with interlocks.

One set 2000 amps three single phase 63 KA, 300 KV SF6 gas insulated

circuit breaker, complete with earthing switches, operating

mechanism, connecting cables, oil pipes, etc. The circuit breaker

shall be suitable to break charging currents not less than 300 amps at

zero power factors.

One set Three single phase 300 KV metering C.T.s ratio 2000/1 amps. Class I with adequate output for metering and connection to disturbance recorder.

One set Three single phase 300 KV C.T.s class X 2000/1 amp with adequate output for high speed distance protection relay approved

type with fiber optic compatibility.

One set Three single phase 300 KV C.Ts class X 2000/1 amps for distance protection relay approved type in case of OHL or Solkor Cable

differential protection for UGC both protection should have fiber

optic compatibility.

One set Three single phase 300 KV C.T.s of 2000/1 amps ratio class 5P

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with adequate output for directional O/C and E/F relays and also for

connection to the disturbance recorder.

One set Three single phase 300 KV C.T.s of 3000/1 amps. Ratio class X for busbar zone protection.

One set Three single phase indoor 275000 / 110 /110 / 110/110

V3 V3 V3 V3 V3

Volts Star/star/star/open delta/open, delta voltage transformers,

Class 3P accuracy of adequate VA capacity for instruments,

directional over current and earth fault relays and synchronizing.

The V.T. shall have two tertiary winding for connection to each

distance protection relays separately. The value of voltage factor

which is 1.9 Un 30S.

One set Three single phase 300 KV isolator to be installed on the primary

side of the voltage transformers where necessary.

Three SF6 tubing from switchgear to cable corridor adjacent to

300kV switchgear room, will 300 kV 6-single core cable sealing end

boxes shall be installed (two per phase) complete with necessary

galvanized steel supporting structure.

One set

One set

Local control cubicles located in 300 KV switchgear room as

specified.

Six single core (2 cables per phase), cable sealing end boxes to

receive minimum 1600 sq.mm. oil filled cable. These cables end

boxes are located in the concrete corridor so that no 300 kV cable is

laid in the basement.

The above shall include all copper connections, piping, earthing

connections, electrical and mechanical interlocks, auxiliary switches,

multi-core cable glands and all matching current transformers and all

other items to complete including synchronizing facility. Galvanized

steel supporting structure for 300 kV cables together with non-ferrous

cables, cleats and clamps shall be provided.

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1.3 Four (4) circuits bays for four (4) 300 MVA 300/132kv power transformers Bays

Nos. 2, 6, 11 & 15.

Each bay comprising:

Two sets 1000 amps 3-phase busbar connections complete.

One set 1000 amps three single phase 300 KV feeder

isolator complete with operating mechanism.

Two sets 1000 amps three single phase 300 KV busbar isolator

switches complete with operating mechanism.

One set Feeder earthing switch complete with interlocks.

One set 1000 amps three single phase 63 KA, 300 KV SF6 gas

insulated circuit breaker, complete with earthing switches,

operating mechanism, connecting cables, oil pipes, etc.

The circuit breaker shall be suitable to break charging

currents not less than300 amps at zero power factors.

One set Three single phase 300 KV current transformer, class

10p10 ratio 800/1 amps and of adequate output

For backup over current and earth leakage protection,

metering instruments and disturbance recorders.

Two set Each three 1- phase 300 KV current transformers class X ratio

suitable to match with 1400/1 amps on 132 KV side, of

adequate output for biased differential protection.

One set Three single phase 300 KV C.Ts class X 800/1 amps with adequate burden restricted earth fault protection.

One set Three single phase 300 KV C.T.s of 3000/1 amps. Ratio class X for busbar zone protection.

One set Three single phase 300 KV SF6 tubing connected at the other end

to the 300kv disconnecting link chamber on the 300MVA

transformers.

One set Local control cubicle in 400kv switchgear room as specified.

The above shall include all copper connections, piping, earthing connections,

electrical and mechanical interlocks, auxiliary switches, multi-core cable glands and all

matching current transformers and all other items to complete including synchronizing

facility. Galvanized steel supporting structure for 300 kV cables together with non-ferrous

cables, cleats and clamps shall be provided.

1.4 One (1) bus-coupler circuit bay No. 10:

Comprising of:

Two sets 3000 amps, three 1-phase bus-connections complete.

One set 3000 amps, three 1-phase 63 KA 300 KV busbar complete circuit breaker

complete with earthing switches, operating mechanism, connecting cables,

pipes, etc. All necessary earthing connections, multi-core cable glands,

auxiliary switches, interlocks, etc. and all other items necessary to complete.

Two sets 3000 Amps three single phase 300 KV busbar isolator switch complete with

driving mechanism.

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One set Local control cubicle in the 300 KV switchgear room as specified.

Two sets One set on each side of the circuit breaker of three single phase current

transformers, Class X with 3000/1 amps ratio and burden for busbar zone

protection.

One set Three single phase 300 KV current transformers, class 10P10 ratio 3000/1

amps and of adequate output for over current and earth leakage protection and

metering instruments.

The above shall include all copper connections, piping, earthing connections, electrical and

mechanical interlocks, auxiliary switches, multi-core cable glands and all other items

necessary to complete.

1.5 Two (2) Bus Section circuit bay Nos. 8 & 9 :

Each of these bays is basically of the same components as for bay No. 8&9 of the bus-

coupler bay except for configuration and arrangement to suit the function it is designed for.

NB:

The four sets of busbar earthing switches specified under clause 1.1 above shall be

installed adjacent to these bays Nos. 8 & 9 one set of 3 single phase earthing

switches, one each side.

1.6 300 KV power Cables and SF6 Tubing Supporting Structures:

The necessary galvanized steel work for supporting the 300 KV cables or SF6/air

bushings in the concrete corridor adjacent to the switchgear room as the cable

arrangement may be but complete with non-ferrous cable cleats, bolts, nuts, etc to

be supplied.

Four sets Galvanized steel supporting structures and wall frames for the 300 KV

SF6 tubing of the four 300 MVA transformers.

One set Permanent and portable steel platforms complete with ladders and rails

for erection, testing, periodical maintenance and repair. This is required

to cover the whole gear.

1.7 Synchronizing:

Synchronizing is required on the 300 KV feeders, B/C & B/S circuits. Thus the tender price

shall cover the supply and installation of all the necessary materials as described under

technical specifications.

1.8 under frequency:

Under frequency is required on the 132 KV feeders , B/C & B/S circuits. Thus the tender

price shall cover the supply and installation of all the necessary materials as described under

technical specifications.

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2. Details of Transformers and Shunt Reactors:-

2.1 :Power Transformers and Associated Equipment:

Four 300/132/33 KV three winding power transformer with nominal capacity of

secondary star and delta windings of 300MVA and 45 MVAR respectively

complete with ON-LOAD tap changers. For load combination, see clause 2.3

of Volume II of the specifications.

However, the transformers shall be complete with current transformer for

restricted earth fault protection. The C.Ts on the neutral connection at high voltage side shall be SF6 insulated, and at L.V. side shall be of the ring type

housed in an arrangement. The final arrangement shall be subject to MEW at

no extra cost.

Four sets Transformer neutral earthling arrangement. Each 300MVA transformer neutral

shall be provided as follows:

It is required to provide SF6 tubing from the neutral of the 300MVA

transformer at H.V. side to the neutral earthling isolators. The isolators at

H.V. side shall be SF6 gas insulated switchgear. The neutral of each

transformer shall be brought through SF6 tubing to the neutral earthling switch

together with its control shall be provided and installed. The H.V. side neutral

shall also be provided and SF6 insulated lightning arrestors. The tenderers

shall submit detailed drawings showing their counter proposals to achieve the

above requirements. The cost of all the above mentioned tubing, earthling

switch, current transformer and control, .etc, shall be included in the tender price.

It is to be noted that separate 300KV neutral earthing enclosures shall be

provided when proposing the substation layout arrangement and shall be

considered as included in the civil scope of work covered by this tender.

Details shall be subject to MEWs approval. The L.T. side neutral shall be connected to ground via the disconnecting link

chamber.

The surge arrestor and earth switch on H.V. side and link chamber of L.V.

side which are used for earthing of the 300MVA transformers neutrals should

be connected to earth with adequate size of insulated cable which shall be

subject to the approval of the Purchaser. Detailed calculations to prove the

adequacy of size and insulation shall be submitted by the Contractor for

approval purpose.

15

Four sets Delta Windings terminations:

The terminations of the delta winding shall be brought out through 33KV

disconnecting link chamber provided with oil immersed copper bolted links.

The links chamber shall be followed by a H.V. cable box suitable to receive

three (3) single core 33KV 1000 sq.mm. XLPE

300MVA power transformers shall be designed that when no blower and

cooling pumps are running, the transformer is capable to give continuous

output of not less than 60% of its rated capacity in addition to the 45 MVAR

shunt reactor load.

The supply and erection of the power cables for the above transformers and

reactors are included in the scope of supply of this tender.

In the layout arrangement of the substation provisions shall be made for the

necessary civil opening, trays, structures, etc. for laying of the power and

control cables in connection with the above reactors. The cost of these works

shall be included in the tender price.

For the four numbers of 45 MVA reactors, the tenderers shall include for the

construction of the necessary civil rooms and foundation which shall be of the

same design as specified for the power transformers room in this tender and

which shall form part of the substation building and included in the tender

price.

Provision shall also be made in the substation building to accommodate 33

KV switchgear (4) panels to control the above shunt reactors. The cost of civil

works for the above shall be included in the tender price.

NB: 1) The neutral of the H.V. side of 300 MVA transformers shall be brought through

SF6 tube in a room and termination in the neutral gear which shall be in the

form of a cubicle with mimic diagram, indication lights and the isolators shall

have necessary auxiliary contacts for interlocking with the C.B. and for remote

indications.

2) Alternatively, the SF6 insulated isolator, L/A, C.Ts , etc for the neutral of the H.V. side of 300 MVA transformers can be located in the separate enclosures

providing adequate span for maintenance of all equipment. However, in this

case also, a cubicle is to be provided in the control room with mimic diagram

and semaphore indications, annunciator window, ..etc. complete with wiring for

specified interlocking and remote indications for the above. The entire

arrangement should be subject to the approval of the purchaser.

16

2.2 Details of Transformers:

Note: All ratings are minimum ratings under worst Kuwait conditions.

No Details of Transformers 300MVA Transformers

1. Quantity required Four

2. Continuous maximum rating (CMR)

Kuwait with blowers and pumps Running

of Star secondary winding

300MVA

3. Type of Installation Outdoor

4. Nominal transformation ratio 300/132/33/KV

5. Method of Cooling:

(OF- Oil Forced)

(AB- Air Blast)

ONAN/OFAF

6. External cooling medium and Oil circulating

pump.

Air Blast, oil forced.

7. Phase Connections:

a) H.V. winding

b) L.V. winding

c) Tertiary winding

d) Neutrals (H.V. &

L.V. brought out)

Star

Star

Delta

Yes

8. Vector Group YN Yno +d

9. Percentage impedance voltage:(HV/LV

Star) 18%

10. Transformer designed for impulse testing Yes

11. Type of tap-change equipment ON-LOAD automatic

remote electrical and manual

12. Total range of variation of

transformer ratio:

- Increasing ratio %

- Decreasing ratio %

30%

+15%

-15%

13. Number and size of step %

20 x 1.5%

14.

Type of insulation Class A to BSS 171

15. Insulation Level Standard I to BSS 171

16. Systems highest voltage of:

a- H.V. winding

b- L.V. winding (Star)

c- L.V. winding (Delta)

300KV

145KV

36 KV

17. Transformer designed for parallel operation

Yes

18. Dummy master-group follower control Yes

19. Marshalling Kiosks Yes

20. Conservator for two portions Yes

21. Explosion vents Yes

17

No Details of Transformers 300MVA Transformers

22. Breathers Yes

23. Buchholz protection relays (two) Yes

24. Tap-change gas devices (three) Yes

25. Disconnecting link chambers gas relays Yes

26. Winding temperature indications Yes

27. Oil temperature indications Yes

28. Low oil level indication main tank Yes

29. Low oil level indication tap tank Yes

30. Terminations:

a) H.V. side

b) L.V. side

c) Delta connected tertiary d) Filling medium:

- H.V. Side

- L.V. side

3 single phase compartments for connections to

300KV SF6 gas tubing and neutral brought out

and connected to SF6 gas

insulated gear through SF6 tubing

as described.

Six (6) cable 132KV 800 sq.mm.

XLPE sealing end boxes (2 per

Phase and one for neutral with suitable size)

Suitable to receive 3 single core Winding 33KV

1000 sq.mm. XLPE cables

Oil

Oil

31. High Voltage side with SF6 tubing Yes

32. Low voltage cable disconnecting link Yes

33. Voltage to earth for which star Point of

transformer winding is to be insulated (H.V &

L.V)

Phase Voltage

34. Equipment to be supplied with transformer

for mounting on control panels or desks:

a

)

Remote step-by-step tap position

indicator flush mounting tube with

black bezelle 6 diameter.

b

)

Voltage control relay with time

delay (1.5%)

c

)

Remote control switches Raise/lower

d

)

Change over switches

e

)

Out-of-step relay with hand reset

f

)

Tap change in progress, warning

lamp240 volts A.C.

g

)

Volt-meter flush mounting type

with black bezel.

Yes

Yes

Yes

Yes

Yes

Yes

Yes

35. Remote Supervisory & control Yes

36. High pressure fire fighting system Yes

18

3. Remote Control board for 300 KV Switchgear:

3.1 TEN( 10) feeder circuit control panels:

Each circuit is equipped as follows:

Three sets Ammeters scaled for C.T's ratio 2000/1 amps.

One set Voltmeter scaled 0-300 KV range with a selector switch to select phase

to phase and phase to neutral voltages.

Three sets Voltage failure indication lamps or (LED) light emitting diodes for red,

yellow and blue phases using colored glass lenses.

One set

One set

Auto-trip indication lamp, amber color using glass lenses

SF6 gas low pressure alarm/trip with flag indications. One set 300 KV SF6 low gas pressure alarm/trip for SF6 tubing connection

between 300 KV switchgear and outdoor bushings.

One set Healthy trip indication lamp with test button and resistance.

One set Mega-watt meter (for export/import)

One set MVAR meter (for export/import)

One set Power factor meter (lead/lag)

One set Of control switches with semaphore indication and mimic diagram

colored Yellow. One set Selector switch for supervisory/local control

One set Test terminal block for measuring circuit

One set Of necessary contactors and/or auxiliary relays for supervisory remote

control.

One set Of busbars, control m.c.b. labels, test links, small wiring instrument m.c.b.

fittings, etc. to complete including check synchronizing facility and any

other alarms and indications associated with the 300 KV equipment.

Remote Supervisory & Control:

a) Auxiliary relay Remote supervisory tripping of the circuit breaker with a separate set of contacts to interrupt the auto-trip indication and alarm circuits.

b) Auxiliary relays for remote supervisory closing of the circuit breaker with separate sets of contacts as may be necessary.

c) Status indication: i-

ii-

Circuit breaker open closed Selector switch Supervisory local.

iii-

iv-

v-

Busbar selector isolator: open/closed.

Line isolator " open" /" closed "

Earthing switches . open closed d) Alarms

i- Driving mechanism trouble.

ii- Arcing chamber low SF6 gas pressure (alarm/trip)

iii- Isolation SF6 gas low pressure (alarm/trip)

iv- Circuit breaker poles discrepancy

v- Circuit breaker failed to trip

19

vi- Over current trip, earth fault trip, high speed distance relay alarm and trip with

(separate signals for each step).

vii-

viii-

Busbar fault trip

inter-trip receive alarm.

ix- inter-trip equipment auxiliary supply fail.

e) Any other necessary auxiliary relays and/or contactors.

f) Necessary terminal blocks. Wiring from these terminal blocks to the transfer

terminal cabinet shall be 1.5 sq mm. control cables.

g) Supply, installation and wiring of the following equipment:

i- Two auxiliary relays, one for opening and one for closing the circuit breaker.

ii- One MW and one MVAR transducers

NN.B: All contactors for remote supervisory control should be clean contacts (potential

free) and fleeting (also for air pressure, gas pressure and oil pressure of driving

mechanism) but with a holding time not less than 25 m.s. All alarms to be signaled

separately.

3.2 Four (4) 300 MVA Transformer Circuits Control Panels: Each circuit equipped as follows:

Three sets Ammeters scaled for C.Ts ratio 600/1 amps. One set Control switches with semaphore indication and mimic diagram

colored Yellow showing the neutral isolators and arrestors. One set Selector switch for supervisory/local control.

One set Auto-trip indication lamp, amber color.

One set Healthy trip indication lamp with test button and resistance.

One set 300 KV SF6 low gas pressure alarm/trip relays with flag indication

for tubing connection and also for SF6 tubing for transformer neutral.

One set Test terminal block for measuring circuit.

One set Inter-tripping relays with flag indication (sending and receiving)

One set Of necessary auxiliary relay and/or contactors for supervisory remote

control.

One set Of busbars, control, m.c.b.s, test links, labels, small wiring instrument m.c.bs fittings, any other alarms and indications associated with 300 KV equipment and sundries to complete.

Remote Supervisory & Control

a) Auxiliary relay for remote supervisory tripping of the circuit breaker with a separate set of contacts to interrupt the auto trip indication and alarm circuits.

b) Auxiliary relay for remote supervisory closing of the circuit breaker with separate sets of contacts as may be necessary.

c) Status indication i-

ii-

Circuit breaker open Closed Selector switch Supervisory local.

iii-

iv-

vii-

Busbars selection isolators: open/closed.

Line isolator " open" - " closed "

Earthing switches. open closed

20

d) Alarms.- i) Drive mechanism trouble.

ii) Arcing chamber SF6 gas low pressure (Alarm/trip)

iii) Isolation SF6 gas low pressure (alarm/Trip)

iv) Circuit breaker poles discrepancy

vii) Circuit breaker failed to trip

viii) Over current trip, earth fault trip. ix) Differential and restricted E/F relay trip

d. Busbar fault trip e. Inter-trip receives alarm.

e) Any other necessary auxiliary relays and/or contactors.

f) Necessary terminal blocks. Wiring from these terminal blocks to the transfer terminal cabinet shall be 1.5 sq.mm.

g) Supply, installation and wiring of two auxiliary relays, one for opening and one for closing the circuit breaker.

NB: All contacts for remote supervisory and control should be clean contacts

(potential free) and fleeting (except for gas pressure, air pressure and oil

pressure of driving mechanism) but holding time not less than 25 m.s.

All alarms to be signaled separately.

3.3 One (1) Bus-coupler & Two(2) Bus-section Control Panels: Each equipped as follows:

Three Sets Ammeters scaled 0 3000 amps range. One Set Control switches with semaphore indication and mimic diagram

colored Yellow including the control and indication of all isolators and circuit breakers.

One set Selector switch for supervisory/local control.

One set Auto-trip indication lamp, amber color using glass lens.

One set Health trip indication lamp with test button and resistance.

One set SF6 gas low pressure alarm/trip with flag indications.

One set Alarm/trip indication of busbar protection for each of the four zones of

the switchgear. This may be mounted on the bus coupler panel.

One set Busbar low gas pressure alarm/trip (one for each bus-section) with flag

indications.

Remote Supervisory And Control:

a) Auxiliary relay for remote / supervisory tripping of the circuit breaker with a separate set of contacts to interrupt the auto trip indication and alarm

circuits.

b) Auxiliary relay for remote supervisory closing of the circuit breaker with separate set of contacts as may be necessary.

c) Status Indication:

i) Circuit breaker open closed ii) Busbar selection isolator Open Closed iii) Busbar live for each busbar section. iv) Busbar earthing switches open closed

d) Alarms: i) Drive mechanism, trouble ii) Arcing

chamber SF6- gas low Pressure alarm/trip

iii) Busbars low gas pressure

v) Isolation SF6 gas low pressure alarm/trip

21

vi) Circuit breaker failed to trip vii) Circuit breaker poles discrepancy viii) Over-current trip, earth fault trip. ix) Inter-trip receives alarm, busbar protection supervision alarm

and busbar protection trip for each zone of the main busbars.

3.4 One Synchronizing Panel having:

- Synchronizing voltmeters - Synchronizing frequency meters

- Synchronous scope (Draw able and rotating type)

- Synchronizing relay

- By pass switch for synchronizing relay and all other items necessary to complete.

e) Any other necessary auxiliary relays and/or contactors.

f) Necessary terminal blocks, wiring from these terminal blocks to the transfer

terminal cabinets shall be 1.5 sq.mm.

g) Supply, installation and wiring of the following equipment.

i) Two auxiliary relays one for opening and one for closing the circuit breaker.

ii) One amp transducer

iii) Four KV transducers (one for each busbar section).

N.B:

http://www.eqla3-soft.com

GRAMMAR

Prepared by: Mulla (2002)May 2002 (version 0)

Reference: Grammar For All Levels By Adnan Naim

All contacts for remote supervisory and control should be clean

contacts (potential free) and flatting (except for gas pressure

and oil pressure of driving mechanism) but with holding time

not less than 25 m.s.

- All alarms to be signaled separately.

- All cable low oil pressure alarm gauges (if applicable) must be fitted with two sets of contacts, one for alarm and one for

tripping of the corresponding circuit.

The gauge contacts must be of the snap action type and rated to

suit the connected annunciator.

- The busbar live indication and the KV transducer shall be fed from the auxiliary bus-wires of synchronizing running voltage

where sequence of connection is from 300 KV feeders and

132KV feeders from left to right order when viewed from

front.

- Attention of all tenderers is drawn that the control of all 300 KV isolators must be provided locally and remotely

from the control room. But for the earthing switches to be

controlled from the local control panels only. Further, the

earthing switches for feeders (underground or O/H line

circuits) shall be interlocked with the associated voltage

transformers.

However, position indication ON/OFF for isolator and

earthing switches shall be provided on the local and remote

control panels. Position indication ON/OFF for V.T. isolators

shall be provided on the local control panel.

- The two relays (50V DC) for tele-control (one for closing and one for opening the circuit breaker) from the supervisory

centre shall be Siemens V23009/SR15 type or equivalent

subject to MEW approval

22

A comprehensive scheme for synchronizing, busbar live and busbar voltage measurement

for control centre measurement shall be subject to the purchasers approval.

4.1: Protection Relay Board for 300KV Switchgear

Ten (10) panels for overhead line circuits: Each panel equipped as follows:

One set Three directional over current and earth leakage IDMT relay with auxiliary relay,

etc. as specified complete with the necessary contacts for supervisory alarm indication

for all panels.

One set 3-phase solid state distance relay approved type complete with all auxiliaries

including under voltage starting relays, transient blocking, power swing blocking,

auto-re-closing signal block, etc. and arranged in a permissive over reaching

(unblocking) scheme. This type RE93 with inter-tripping through separate channel.

One set Three phase high speed distance relay of approved type consists of permissive under

reaching type (second main protection) with three steps complete, alarm indicators,

disturbance, event recorder, fault locator and switches and supervisory alarm

indications as specified.

One set Protective relays with time lag for circuit breaker fail to trip.

One set Auxiliary relays for connection to disturbance recorders.

One set Service/test position switches for each relay circuits.

One set Inter-tripping auxiliary relays at this substation (PLC & Inter-trip equipment

are included under telemetry clause of this tender)

4.2 300 KV O/H line circuits:

1. Separate current transformer core of suitable accuracy and burden shall be provided

in the 300 KV switchgear for each distance protection.

2a) Main I - ABB type REL670,ver. 34 distance protection complete as specified.

b) Main II Siemens type 7SA522 all auxiliaries as above but arranged in a permissive under-reaching (carrier acceleration) scheme.

3. Separate trip coils shall be provided for connecting independently the trip circuit of the

above mentioned two relays or high speed distance protection.

4. In the 275000 / 110 / 110 / 110 / 110 voltage transformers.

V3 V3 V3 V3 V3

Separate tertiary winding shall be provided to connect separately double protection

scheme.

5. It shall be noted that completely separate screened secondary wiring is to be provided

for each protection scheme described above.

6. 220 VDC supply from two different sources shall be connected to each of the double

protection scheme. One 220 V D.C. supply from the tripping battery and the other

from 220 V DC control battery.

NB : It has been decided to use fiber optic cable instead of pilot cable for 300kV and

132kV therefore all the tenderers are requested to study this requirements and include in their offers any

interface equipment/fiber optic compatible relays.

23

4.3 Four(4) Panels for the Four 300 MVA Transformers:

Each equipped as follows:

One set Three phase non-directional over current and earth leakage relays as

specified.

One set Three phase differential relay similar to duo-bias relay of M/s

Reyrolle of England as specified. This relay should be suitable for 3

winding transformers.

One set Restricted earth fault relay for the high voltage winding of the trans

former

with auxiliary contacts for indication at National Control Centre.

One set Protection relays with time lag for circuit breaker fail to trip

Two

sets

Auxiliary relays for connection to disturbance recorder one

connected to H.V. line side and one to the H.V. neutral current

transformer.

One set Service/test position switch for each relay circuit or testing sockets

and plugs as per Vol. I.

One set Of any auxiliary relay for the specified inter-tripping and interlocking

schemes and all other items necessary to complete.

4.3.1 Double differential protection of 300 MVA Transformers:

4.4

Generally the scheme is to be prepared based on the above requirement.

However, in this case two trip coils are also provided in the 132 kV switchgear

controlling the L.V. side of the 300 MVA transformers.

One (1) panel for Bus-coupler and two(2) panels for bus-section circuits: Each equipped with:

One set Three phase non-directional over current and earth fault relays as

specified.

One set Auxiliary relays for connection to disturbance recorder.

One set Protective relays with time lag against circuit breaker fail to trip.

One set Service/test switch for each relays or testing sockets and plugs as per

volume I.

4.5 Busbar protection panel: comprising:

One set Protective relays of the electronic fully digital type, for each busbar zone (section)

with automatic testing continuous monitoring and diagnostics facilities and as

specified, complete with check zone & discriminative zones.

One set Auxiliary relays, matching current transformers, contactors, alarm indication

relays, complete with auxiliary contacts for indication at the National control Centre.

One set Supervisory relays for the secondary C.T. control cables to avoid mal-tripping with

auxiliary relays for local and remote alarm indication.

One set Testing facility for periodical checking but on the board (i.e. for secondary

injection testing). Test links and test sockets both are to be provided.

24

4.6 Disturbance Recorder panel: One set Of the latest modern version of digital fault recorder for recording of system

disturbance and fault monitoring by acquisition and analysis of power system

disturbance as in clause 8.4, vol. II The digital disturbance recorder shall be

with the following functions and capabilities.

High sampling rate

High recording capacity

Power and frequency recorder

Power grid system quality

Event recorder.

Time synchronizing by GPS receiver.

Remote data transformer facilities

NB : 1) All A.C. and D.C. miniature circuit breakers used for 300 KV switchgear and 300

KVcontrol and relay board shall be fitted with auxiliary contacts wired and

grouped to give remote supervisory alarm indication, in case tripped or opened.

(one local alarm indication for each 300 KV circuit and one signal for whole 300

KV board to N.C.C.).

2) All relays shall have individual flag local indication.

3) If testing sockets and plugs are offered for withdrawal relays, then two plugs

complete with leads, terminals, etc. shall be provided for each substation.

4) General notes clause 6.7.14 of Volume I is also applicable.

5. Transformer Tap-change Control panels:

The arrangement of tap change control panels with reference to300 KV remote control

panels is subject to approval. These panels shall be arranged to read from left to right as

follows:

Panel No.1 300 MVA transformer No.1

Panel No.2 300 MVA transformer No.2

Panel No.3

Panel No.4 300 MVA transformer No.3

300 MVA transformer No.3

300 MVA transformer No.4

NB: Alternatively the tap change control panels may be arranged to form part of the

300 KV remote control panels, in which case the panel number will be :

25

2A, 6A, 11A & 15A on300 KV control board.

5.1 Each panel shall be equipped as follows:

Operation a) Tap change raise and lower control

switches.

b) Tap change control selector switches

for:

- Hand or automatic

- Individual parallel operation.

- Leader or follower regulations control.

Indication

a)

Tap change position indicator

b) Tap change in progress.

Instruments One voltmeter

Relays One voltage regulator relay with time delay.

One out-of-step relay

Alarm Out-of-step alarm

Drive mechanism motor trouble.

Remote supervisory & Control:

a) All necessary contactors and/or auxiliary relays

b) Status indication:

supervisory/parallel

Tap positions.

Tap changer in progress.

NB: The supervisory/local selection shall be arranged by supervisory/local selector switches

for the 300 KV circuit breakers controlling the corresponding 300 MVA transformers

respectively.

c ) Alarms :

Tap change in progress, upper limit and lower limit positions of tap

changer, out of step, fans running, buchholz main tank alarm, buchholz

main tank trip, tap changer buchholz trip, winding temperature alarm,

winding temperature trip, oil temperature alarm, oil temperature trip, low

oil level, fan trouble oil pumps running, oil pump trouble and O.L.T.C.

motor trouble.

d) Supply, installation and wiring of the following:

1. Two auxiliary relays for tap control one for raise-tap and one for lower-tap.

2. All the 21 tap positions to be wired separately for remote supervisory and not as

measurement through transducer.

NB : a) All contacts for remote supervisory and control shall be clean contacts (potential-free)

and of the fleeting type with holding time not less than 25 m.s.

26

b) In location, dimension and design of tap change panels is subject to MEW approval.

Possibility of designing and placing the tap change control panels of all transformers at

one place will be considered.

c) Sundries:

All contactors, terminal blocks, label fixtures, wiring ferrules, m.c.b.s links connections rear access doors multi-core cable glands and all other necessary apparatus

connected with the tap change equipment.

6. Equipment Associated with the transformer:

The neutral of H.V. and L.V. of the transformer is brought out by SF6 insulated tubing and direct

earthing by cable respectively. The H.V. side shall be earthed through SF6 insulated earthing

switch and lightning arrestors with detectors and counters. The C.T. for restricted earth fault

protection shall be SF6 insulated at H.V. side and ring type at L.V. side however through bolted oil

immersed link box.

7. 33 KV Switchgear for controlling of 4x45 MVAR Shunt Reactors:

The scope of work covers supply and erection of four panels 33 KV 3-phase 1000 A Kuwait Rating

switchgear. The 3-phase symmetrical short circuit rating shall be as obtained from detailed

calculations based on network and transformer reactance however not less than 24 KA at 36 KV.

Each of these panels shall be provided with two cable end sealing boxes, one for cable from power

transformer, and the other to the shunt reactor from the other side, i.e. in each panel the 33 KV

cable will be connected in and out. The 33 KV switchboard shall be designed when viewed from

front and counted from left to right as below:

Panel no. 1 Controlling shunt reactor No.1 and fed by 300 MVA transformer no.1

Panel no.2 Controlling shunt reactor No.2 and fed by 300 MVA transformer no.2

Panel no.3 Controlling shunt reactor No.3 and fed by 300 MVA transformer no.3

Panel no.4 Controlling shunt reactor No.4 and fed by 300 MVA transformer no.4

This board shall be erected in a separate room and shall comprise the following:

7.1 33 KV Switchgear 45 MVAR shunt Reactor: Breaking capacity : 24 KA minimum at 36 KV

Nominal rating 1000 amps

Operation Remote controlled automatic motor charged spring close

Trip coil D.C. shunt trip

Spring release coil D.C. supply

The switchboard shall be provided with pressure switches for arcing fault protection for

each compartment to trip the circuit breaker in case of faults and this shall be signaled to

the local control room as well as to the supervisory Control Centre. The panels shall have

flap covers with spring assistance to release gases in case of internal faults and this shall be

signaled to the local control room as well as to the supervisory control centre. Each panel

shall be completely separate from the adjacent panels. However, the 4 panels board shall

be rigid, sturdy and shall be of the same design as recently erected in MEW Network.

27

Circuit breaker Shall be of the horizontal withdrawal type provided with the

necessary screen shutters, guide rails, pressure switches, earthing

switches complete with internal lighting for each panel for visual

checking of the proper engagement of the isolating contacts.

Cable box Cable end sealing boxes with brass wiping glands, earthing clamps and

bonding strips to receive three 1000 sq.mm. 1/core 33 KV XLPE cables

complete with cable lugs, insulating compounds, etc. (Two sets of boxes for

each panel).

Labels One circuit label of adequate dimensions located in a prominent position,

when viewed from the front

One small label at the rear of the panel.

Protection: a- Buchholz trip, oil and winding, high temperature trip, low oil level

alarm.

b- Over current and earth leakage and REF protection.

c- Differential protection (common for 300 MVA transformer).

d-

e-

Inter-tripping and interlocking.

Over voltage relay with V.T for earth fault at 33KV tertiary

winding.

Current Transformers

One set

3single phase current transformer for the over-current and earth

leakage protection and instrument ratio 1000/1 amps.

Two sets each 3 single phase current transformers for differential protection.

One set 3 single phase C.T.s and one phase neutral C.T. for restricted earth fault of the shunt reactor.

Local control Emergency trip button suitably shrouded or recessed.

Indication a) Auto-trip lamp with cancellation push button.

b) Closed state and open state indication.

c) Spring charged state and uncharged state indication.

d) ON/OFF lamp indication using glass lenses colored red and green 240 volts A.C.

One set Galvanized steel supporting structure for 33 KV cables in the basement, complete

with necessary clamps, cleats, earthing, etc.

7.2 33 KV Surge Arrestors

For the safe switching respectively, tripping operation of the 33 KV circuit breakers.

Tenderers are requested to consider that based on the 300 MVA transformer, 45 MVAR

shunt reactor, connecting power cables and network constants, if the calculations show that

33 KV surge arrestors are necessary to avoid excessive over voltage, these arrestors shall be

supplied complete with counters and shall be installed at no extra cost to the contract price,

the detailed design of which and rating shall be subject to MEW approval prior to

manufacture of the 300 MVA transformers.

The contractor must submit detailed calculations, type test reports to show the maximum

rate of rise of recovery voltage and the amplitude of that voltage together with reference

international standards for checking and approval by the purchaser.

28

8. Remote Control & Relay Board for 45 MVA Reactors: Each panel is equipped as follows:

Purpose Remote control of 45 MVAR reactors

Panels To be located in a prominent place in the control room.

Operation a) Control switch trip and close D.C. supply b) Supervisory/local control selector switch.

Indication: a) Mimic diagram colored red with semaphore indications (normally de-

energized) D.C. supply.

b) One healthy trip indication lamp with resistance and test push button.

c) One auto-trip lamp indication d) Buchholz, oil and winding temperature fan motors, low oil level,

any other services on the reactors.

e) Pressure switches operated with flag indication. Instrument Three ammeters rectangular dial, flush mounting type scaled to suit C.T.

ratio.

Relays :

a. Restricted earth fault relay. b. Differential protection c. Over current and E/F relay. d. One winding temperature alarm/trip relay. e. One oil temperature alarm/trip relay f. Buchholz alarm-trip relay g. Low oil level alarm

Remote Supervisory & Control: a) Auxiliary relay for remote supervisory tripping of the circuit breaker with a separate

set of contacts to interrupt the auto-trip indication and alarm circuits.

b) Auxiliary relay for remote supervisory closing of the circuit breaker with separate sets of contacts may be necessary.

c) Status indication (circuit breaker open , closed withdrawn selector switch (supervisory local).

d) Alarms:

i. Driving mechanism trouble. ii. Over current trip, earth fault trip and REF relay trip.

iii. Buchholz alarm, buchholz trip, winding temperature alarm/trip oil temperature alarm, oil temperature trip, law oil level alarm.

e) Any other necessary auxiliary relays/ and/ or contactors. f) Necessary terminal blocks. g) Supply, installation and wiring of the following equipment:

i. Two relays of M/s Siemens type V2300 g/SR15 rated at 50 VDC equivalent are to be used one for opening and one for closing the circuit breakers.

ii. One amp transducer.

29

NB: All contacts for remote supervisory and control should be clean contacts

(potential free) and fleeting with holding time not less than 25 m.s.

Labels:

- One circuit label located on a prominent position at the front of the control board. - One small circuit label located on the rear door.

Small wiring

The cubicle should be completed with all small wiring, m.c.b.s terminal blocks , cable glands,

etc. Test Switch

One test switch (service/test connected in over current and earth leakage protection circuit.

Test switch

As above for REF relay.

9. Supply & installation of 4x45 MVAR Shunt Reactors. The technical details of the shunt reactors are given below:

9.1 Specifications for Shunt Reactors: For compensation of capacitive reactive power consumed by the existing cable

networks, it has been decided to install shunt reactors each 45 MVAR and connect to

33 KV Switchgear as described earlier in power transformers and 33 KV switchgear

clauses respectively. These reactors shall be of the outdoor type. However, these

reactors shall be installed in rooms separately as in the case of 300 MVA power

transformer included in this specification.

The technical specifications of the required reactors shall be basically the same as those

described and detailed for power transformers. The iron core which shall be of non-

aging cold-rolled grain-oriented silicon steel shall have air gaps which must be set by

preliminary tests before varnishing or treating the entire assembly. These gaps must be

provided by suitable spacers and treatment to avoid noise. The core cross sectional

area must be sufficient to have maximum flux density in core or yoke of 14,000 gauss.

The magnetic circuit construction shall be such that removal and replacement of

windings will limit removing of laminations to a minimum. The required reactors shall

be of the core-type or shell type of oil-immersed and with class A insulation.

Since shunt reactors do not experience heavy short time currents due to short circuits or

heavy load, current densities higher than those specified for the 300MVA transformers

can be used. However, the attention of tenders is drawn to the fact that for evaluation

and comparison purpose of the reactors offered in tender analysis; the cost of losses

shall be capitalized based on KD.500/- per each kilo watt.

The reactor winding shall be fully insulated, with the end coils having additional

protection against abnormal line disturbances. Among other facilities provided for

moving and handling the reactors, directions shall be provided. The cooling radiators

shall be mounted on the tank and these shall be of detachable type with isolating valve

for each radiator element. The oil shall be of the same type as that of the power

transformers.

The shunt reactors shall be equipped with an oil conservator, breather, piping, valves

and monitoring facilities for local and remote supervisory indications as specified for

the power transformers but as applicable to the reactors.

For connection to the 33KV switchgear 33 KV three single core, 1000 sq.mm. XLPE,

cable termination boxes complete with all primary connections, bushings, supports, etc.

shall be provided. The cable boxes shall be suitable to receive these cables. For

30

earthing of neutral point of the reactor a separate cable box shall be provided complete

with cable connection to outdoor earthing ring. The noise level measured from the

reactor at a distance of 20 meters shall not exceed 50 db measured in open space and

necessary noise level test shall be carried at works as far as practicable in the presence

of the inspector. Otherwise measurement can be carried out at a distance of one meter

and calculations shall be submitted by the Contractor to show that the specified limit at

20 meters is fulfilled. Neutral current transformer for REF protection shall be of the

ring type suitably mechanical protected subject to MEW approval.

9.2 Details of Shunt Reactors:

The main technical data of the shunt reactors shall be as detailed below:

1. Rated Power 45MVAR

2. Rated frequency 50 Hz.

3. Rated voltage 33KV

4. Vector group symbol Star

5. Number of Phases Three

6. Magnetic Circuit

Construction

Core type or shell

type

7. Magnetic flux density at nominal

ratings (in yoke and core)

1.4 tesla

8. Type of installation Outdoor

9. Method of cooling ONAN

10. Maximum ambient temperature 55 C

11. Limit of winding temperature rise 50 C

12. Limit of oil temperature 40 C

13. Impedance voltage 95%

14. Designed for impulse testing Yes

15. Type of insulation Class A to BSS171

16. Insulation level Standard 1 to BSS 171

17. Highest system voltage 36 KV

18. Marshalling Kiosk Yes

19. Conservator Yes

20. Pressure Relief device Yes

21. Breather (s) Yes

22. Buchholz protection Yes

23. Winding and oil temperature

indications.

Yes

24. Low oil level indicator Yes

25. Remote supervisory indications Yes

26. Water fire fighting Yes

31

Details of Equipment contd 10. 132 KV Switchgear:

10.1 Busbars:

Two set of three phase main busbars of 3000 amps, Kuwait rating extending over 32

bays complete with four sets of 3-phase busbar earthing switches

10.2 Twenty Two (22) OHL Feeders bays Nos:,2,4,5,7, 9,10,12, 14,15,16,21,23,25 27,28,29,32,33

And 1, 8,24&34 are spare.

Bay No.2 to bay No.

Bay No.4 to bay No.

Bay no. 5 to bay No.

Bay No.7 to bay No.

Bay No.9 to bay No.

Bay No.10 to " bay No.

Bay No.12 to bay No.

Bay No.14 to bay No.

Bay no. 15 to bay No.

Bay No.16 to bay No

Bay No.21 to bay No

Bay No.23 to bay No.

Bay No.25 to bay No

Bay No.27 to bay No

Bay No.28 to bay No

Bay No.29 to bay No

Bay No.32 to bay No.

Bay no. 33 to bay No.

Each consisting of :

One Set : 800 Amps 3-single phase busbar connections complete

One Set : 800 Amps, 3 single phase 132KV busbar isolator complete with

operating mechanism

One Set : 800 Amps, 3 single phase 132KV feeder isolator complete with

operating mechanism.

32

One Set : 800 Amps 3 single phase10000 MVA 132KV SF6 gas insulated

circuit breaker complete with earthing switches, operating

mechanism connecting cables, oil pipes, etc. The circuit breaker

shall be suitable to break charging current not less than 160 Amps

capacitive at zero power factor.

One Set : Three single phase 132KV C.TS ratio 800-500/1 or 5 amps class

1 with adequate output for metering

One Set : Three single phase 132KV C.T.S class 5P15 ratio 800/1 with

adequate output for directional overcurrent and earth fault relays

One Set : Three single phase 132KV C.T.S class X, ratio 800-500/1 amps

with adequate output for high speed distance protection and shall

match the C.T.S at the other end. (This C.T. should also be

suitable for connection to Solkor RF relay).

One Set : Three single phase 132KV C.T.S class 5P20 with ratio 800/1A

and adequate output for busbar zone protection and shall match

the C.T.S at the other end and be located on the busbar side.

One Set : Three single phase indoor 132/V3 / 110/V3 / 110/V3 volts

star / star / open delta voltage transformers, class 3P accuracy of

adequate VA capacity for instruments directional overcurrent and

earth fault relays .

One Set : Three single phase 132KV isolator to be installed on the primary

side of the V.T.S or other suitable arrangement as per paragraph

3 of clause 3-12 of Part I of specifications.

One Set : Three single phase 132KV SF6 tubing from the switchgear to the

basement.

One Set : Local control cubicle located in the 132KV switchgear as

specified.

One Set : power carrier equipment (indoor and outdoor equipment)

including wave traps, coupling condensers, steel supporting

structures, civil foundation, jumpering, etc. (if applicable)

One Set : Three single phase 132 kV cable sealing end box suitable to

receive 1000 sqmm. XLPE cables.

One Set : The above shall include all copper connections, piping, earthling

connections, electrical and mechanical interlocks, intercropping

auxiliary switches, multicore cable glands and all other items

necessary to complete. Also the necessary supporting galvanized

steel works and non-magnetic cleats for supporting the 132KV

cables shall be supplied and included in the tender price.

33

10.3 Four (4) Circuit, 300 MVA 300/132 KV power Transformers Bays Nos: 6,13,26,30

Each consisting of :

Two sets 1400 amps 3-single phase busbar connections complete.

One set 1400 amps 3-single phase 132 KV transformer isolator complete with

operating mechanism, necessary interlocks, etc.

Two sets 1400 amps, 3-single phase, 132 KV busbar isolator complete with operating

mechanism, necessary interlocks, etc.

One set Feeder earthing switch (of the fault making type) complete with operating

mechanism, interlocks, etc.

One set 1400 amps 3 single phase 10,000 MVA 132 KV SF6 gas insulated circuit

breaker, complete with earthing switches, operating mechanism, connecting

cables, oil pipes, etc. the circuit breaker shall be suitable to break capacity

charging current not less than 160 amps at zero power factor and inductive no

load current of 300 MVA transformers.

Two sets Three single phase 132 KV current transformers class X ratio 1400/1 amps and

of adequate output for biased differential protection.

One set Each three single phase 132 KV current transformers, class 5P20 ratio 1400/1

amps for directional over current and earth leakage protection.

One set Three single phase current transformers, class 1 ratio 1400/1 or 5 amps for

instruments and metering.

One set Three single phase 132 KV 1400/1 amps current transformers, class X for

restricted earth fault protection.

One set Three single phase 132 KV C.T.s class 5P20 3000/1 A ratio and output for busbar zone protection.

One set Three single phase voltage transformers class 3P, ratio 132000 / 110 / 110

volts for tap change V3 V3

V 3

Control protection, metering and synchronizing.

One set

One set

Three single phase SF6 tubing from switchgear to substation cable corridor

adjacent to the substation building.

Three single phase 132kv isolator to be installed on the primary side of the

voltage transformers where necessary.

One set Six (6) single phase cable sealing end to receive six 1/core 800. sq.mm. 132 KV

XLPE cables (two per phase)

One set Local control cubicle (located in the 132 KV switchgear room) complete with

interlocks, alarms, operating switches, auxiliary relays, contactors, etc.

One set Earthing link boxes and earthing conductors, etc. This includes earthing link

boxes with S.V.L. at the transformer side.

S The above shall include all copper connections, piping, earthing connections,

electrical and mechanical interlocks, auxiliary switches, multi-core cable glands

and all other items necessary to complete including synchronizing facility. Steel

supporting structures for cable tails have to be provided.

NB:

132 KV CB controlling 300 MVA transformer is required to have double

monitoring for NCC and DCC for CB status indication and MW and MVAR

measurements. The burden of the measuring CT and VT should be adequate for

this purpose. Two MW and two MVARs transducers will be connected to CT and

VT of each bay.

34

10.4 Four circuits, 30 MVA 132/11.5 KV Power Transformers Bays Nos: 3, 11,22 &31

Each pay comprising :

Two sets 800 amps 3 single phase busbar connections complete.

One set: 800 amps, 3 single phase, 132 KV busbar isolator, complete with

operating mechanism.

One set: 800 amps, 3 single phase 132 KV transformer isolator, complete with

operating mechanism.

One set: Transformer earthing switch ( of fault making type) complete with

interlocks and driving mechanism.

One: 800 amps, 3 phase, 10000 MVA, 132 KV SF6 gas insulated circuit

breaker complete with earthing switches, operating mechanism,

connecting cables, and piping, etc. The circuit breaker shall be suitable

to break charging current not less than 160 amps capacitive at zero

power factors.

One set: Three single phase, 132 KV current transformers class 10P10, ratio

200/1 or 5 amps and of adequate output for backup over current and

earth leakage protection and metering instruments.

One set: Three single phase, 132 KV current transformers, class 5P20 ratio

200/1 or 5 amps and of adequate output for biased differential

protection

One set Three single phase 132 KV C.T.s of ratio 3000/1A and adequate output for busbar zone protection class 5P20

One set Three single phase SF6 tubing from switchgear to substation corridor

adjacent to substation building.

One set Three single phase 132 KV sealing end boxes suitable to receive three

single phase 132 KV 240 sq.mm. XLPE cables.

One set Local control cubicles located in the 132 KV switchgear room as

specified.

The above shall include all copper connections, piping, earthing

connections, necessary interlocks, inter-tripping, auxili