May Cat 110kv

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HCMC PC SPECIFICATION

HIGH VOLTAGE CIRCUIT BREAKER

I. SCOPE :

This specification is applicable to high voltage circuit breaker forouutdoor installation.

II. STANDARD OF MANUFACTURE AND TEST :

IEC 56 : High voltage AC circuit breakers

III. DESCRIPTIONS :

A. SERVICE CONDITIONS :

The circuit breaker shall be designed and fabricated, suitable for outdoorservice in Ho Chi Minh City, Vietnam under the following conditions:

+ Altitude : Up to 40m above sea level

+ Maximum ambient air temperature : 40C

+ Mean annual ambient air temperature : 30C+ Maximum relative humidity : 95%+ Climate : Tropical, salty atmosphere, industrial contamination.+ Solar radiation : 1000W/m2

+ Maximum wind velocity : 30m/s+ Lightning stroke expectancy : 120 thunderstorm days per year.

B. CONSTRUCTION :

- Type of circuit breaker : SF6 type, outdoor service.

- Rated voltage : 123KV

- Rated continuous current : 1250 A

- Rated frequency : 50 Hz

- Rated short-circuit symmetrical breaking current : 31.5 KA

-Rated power frequency withstand voltage :+ Dry for 1 minute : 230 KV

+ Wet for 10 seconds : 230KV

- Rated lightning impulse (1.2/50s wave) withstand voltage : 550KV

- Rated short time withstand current for 3 seconds : 31.5KA

- Rated withstand peak current : 80KA.

- Rated short circuit making current : 80 KA

- Rated operation duty cycle : O-0.3s-CO-3min.-CO

- First-pole-to-clear factor : 1.5

- Rated out-of-phase making or breaking line charging current : 31.5A

- Maximum opening time : 0.05s

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- Maximum closing time : 0.1s

- Operating mechanism type :

+ Closing : spring+ Opening : spring

- Method of manual charging of closing spring for checking andmaintenance : Hand crank

- Protection class : IP54

- Rated voltage of trip and opening coil : 220VDC

- Rated voltage of motor : 220VAC

- Motor protective device : Miniature circuit breaker.

- Number of operations before interrupter maintenance required : 50times at rated short circuit current of 31.5KA

- Auxiliary contacts : 10NO+10NC

- The circuit breaker is equipped with anti-pumping device.

- Maximum dimension as the attached drawing :

+ A : 3300mm

+ B : 3900mm

- Accessories for 01 circuit breaker :+ 06 Pcs of straight bolted terminal connectors for connection ACSR of

400mm2 to circuit breaker terminals

+ 02 Pcs of copper bolted clamps for earthing with 120mm2conductor

+ 01 Set of SF6 gas bottle for first filling+ 01 Set of spring charger motor+ 01 Set of auxiliary contacts 10NO+10NC+ 01 Set of SF6 density gauge

+ 01 Operating handle.+ 01 trip coil 110VDC.+ 01 opening coil 110VDC.+ 01 Set of steel supporting structure

-Accessories for all circuit breakers :

+ 23 set of SF6 gas bottle 10Kg+ 01 set of valves+ 01 set of pressure gauge

IV. TESTING REQUIREMENTS :

1. Testing items :

a. Routine tests :

- Power frequency voltage withstand dry tests on the main circuit- Voltage withstand tests on control and auxiliary circuits


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- Measurement of the resistance of the main circuit- Mechanical operation tests- Design and visual checks

b. Type tests :

- Dielectric tests- Radio interference voltage (RIV) tests- Temperature-rise tests- Measurement of the resistance of the main circuit- Short-time and peak withstand current tests- Mechanical and environmental tests- Miscellaneous provisions for making and breaking tests- Test circuit for short circuit making and breaking tests- Short-circuit test quantities- Short-circuit test procedure- Basic short-circuit test-duties- Critical current tests- Single-phase short-circuit tests- Short-line fault tests- Out-of-phase making and breaking tests- Capacitive current switching tests- Magnetizing and small inductive current switching tests

2. Requirements :

In order to ensure the quality of supplied goods , in case of bidwinning , the Tenderer shall supply routine test and copies of type testreports met the following requirements :

a. Routine test shall be performed for each equipment.b. Type test report shall be approved by an lawful, reputable,

independent testing laboratory with the following content :

- Testing sample : the same as the supplied item (manufacturer,country of origin, manufactures code as specified in tender document).

- Testing items : Including at least testing items as specified inSection IV.1 of this specification.

- Testing values shall be corresponding values as stated in Section IIIof this specification. If in section III, there are no corresponding values,testing values will be selected according to the standard specified insection II of this specification.


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V. REQUIREMENT OF TENDER TECHNICAL DOCUMENTS :

- Detailed summary of deviations to inquiry specification.

- Completed inquiry data sheet expressed at section VI of thisspecification.- Catalogues containing outline dimensions, electrical data andinstallation details.- Certificate of quality management.- The following drawings :

+ Dimension.+ Straight bolted terminal connectors for connection ACSR of 795MCMto disconector terminals+ Bolted clamps for earthing with 120mm2 copper conductor+ Stainless steel structure for 3-pole DS

- The proposal bidding has Type Test Report which meets therequirements as specified in item IV 2.b will be preferable .

VI. DATA SHEET :

No

SPECIFICATION UNIT REQUIREMENTS TENDER

1. Item No.2. Manufacturer3. Country4. Manufacturers code5. Standards of factory and

testIEC 56

6. Standards of qualitymanagement

7. Member approve ofcertificate of management8. In case of bid winning , the

Tenderer shall supplyroutine test and copies oftype test report met therequirements of section IV .

Yes

A. SERVICECONDITIONS :

The circuit breaker shall bedesigned and fabricated,

suitable for outdoor servicein Ho Chi Minh City, Vietnamunder the following


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conditions :9. + Altitude : Up to 40m above

sea level10. + Maximum ambient air

temperatureC 40

11. + Mean annual ambient airtemperature

C 30

12. + Maximum relativehumidity

% 95

13. + Climate Tropical, saltyatmosphere,

industrialcontamination.

14. + Solar radiation W/m2

100015. + Maximum wind velocity m/s 3016. + Lightning stroke

expectancy120 thunderstorm

days per year.B. CONSTRUCTION :

17. Type of circuit breaker : SF6 type, outdoorservice.

18. Rated voltage KV 12319. Rated continuous current A 125020. Rated frequency Hz 50

21. Rated short-circuitsymmetrical breakingcurrent

KA 31.5

22. Rated power frequencywithstand voltage :+ Dry for 1 minute+ Wet for 10 seconds

KVKV

230230

23. Rated lightning impulse

(1.2/50s wave) withstandvoltage

KV 550

24. Rated short time withstand

current for 3 seconds

KA 31.5

25. Rated withstand peakcurrent

KA 80

26. Rated short circuit makingcurrent

KA 80

27. Rated operation duty cycle O-0.3s-CO-3min.-CO28. First-pole-to-clear factor 1.529. Rated out-of-phase (making

or breaking) capacity :+ Line charging current

+ Cable charging current+ Capacitor current

A

AA

31.5

Tenderer mustdescribe these

parameters


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30. Maximum opening time s 0.0531. Maximum closing time from

energisation of close coil tolatching of circuit breaker infully closed position

s 0.1

32. Circuit break operatingmechanism type :+ Closing+ Opening

springspring

33. Method of manual chargingof closing spring forchecking and maintenance

Hand crank

34. Protection class IP54

35. Rated voltage of trip andopening coil

VDC 220

36. Rated voltage of motor VAC 22037. Motor protective device Miniature circuit

breaker38. Number of operations

before interruptermaintenance required

50 times at ratedshort circuit current

of 31.5KA39. Auxiliary contacts 10NO+10NC40. The circuit breaker is

equipped with anti-pumpingdevice

Yes

41. Maximum dimension as theattached drawing :+ A+ B

mmmm

33003900

42. Accessories for 01 circuitbreaker :+ Straight bolted terminalconnectors for connection

ACSR of 400mm2 to circuitbreaker terminals+ Copper bolted clamps forearthing with 120mm2conductor+ SF6 gas bottle for firstfilling+ Spring charger motor+ Auxiliary contacts10NO+10NC+ SF6 density gauge

+ Hand crank+ Trip coil 110VDC.+ Opening coil 110VDC.

Pcs

Pcs

SetSetSet

SetPcs

PcsPcsSet

06

02

010101

0101

010101


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+ Stainless steelsupporting structure

43. Accessories for all circuitbreakers :

+ SF6 gas bottle 10Kg+ Valves+ Pressure gauge

SetSetSet

230101


Documents

May Cat 110kv