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Shaanxi Longxiang Electrical Co., Ltd.

Vacuum Circuit Breaker, Circuit Breaker, Switch manufacturer / supplier in China, offering Zn28A-12 Indoor Vacuum Circuit Breaker, Vib Series Indoor High Voltage Vacuum Circuit Breaker with Embedded Poles, 40.5kv Insulation Housing with ISO9001-2000 and so on.

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Supplier Homepage Product 12kv-Vacuum Circuit Breaker Zn28A-12 Indoor Vacuum Circuit Breaker

Zn28A-12 Indoor Vacuum Circuit Breaker

FOB Price: Get Latest Price
Min. Order: 1 Piece
Production Capacity: 16000sets/Year
Transport Package: Non-Solid Wooden Case for Export Shipment
Payment Terms: L/C, T/T
Basic Info
  • Model NO.: ZN28A-12
  • Operation: Electric Type
  • Arc-extinguishing Medium: Vacuum
  • Structure: ACB
  • Type: Circuit Breaker
  • Certification: VDE, ISO9001-2000, CE, CB, CCC
  • Rated Frequency: 50/60Hz
  • Trademark: Longxiang Electric
  • Origin: China Baoji
  • Breaking Capacity: High Voltage Circuit Breakers
  • Speed: High-Speed Circuit Breaker
  • Installation: Open Frame
  • Poles Number: 3
  • Function: Circuit-Breaker Failure Protection
  • Rated Voltage: 12kv
  • Rated Current: 630/1250/1600/2000/2500/3150A
  • Specification: IEC: M2-E2-C2
  • HS Code: 85389000
Product Description
ZN28A-12 Series of Indoor HV Vacuum Circuit Breaker

General Description
ZN28A-12 fixed type indoor HV vacuum breaker is used for many kinds of switchgear like GG-1A(F),XGN2-12 (Z).It is widely used for 12kV voltage systems which is accordance with GB1984-2003 standards Structural characteristics:
1.This vacuum circuit breaker adopts air insulation ,it can meet air distance and creepage under nomal run condition.
2.The operating mechanism can use CD10,CD17A,ct19A or CT17G type mechanism,the outlet curve has good adaptation for the requirements of vacuum interrupters.It has high reliable with characteristic of long life and easy maintenance.
3.Suitable for varies sites and the work places which have rigorous run condition,especially suitable for reconstruction of old-fashioned oil switch.  
 
Applying ambient conditions

1.Ambient temperature:-15~+40ºC.
2.The height above sea level:≤1000m(besides the special requirements).
3.Relative humidity:the average humidity of a day should be no more than 95%;the average humidity of a month should be no more than 90%.
4.Saturated vapor pressure:the average pressure of a day should be no more than 2.2kPa:the  average pressure of a month should be no more than 1.8kPa.
5.Earthquake intensity:not exceed 8 degrees.
6.It should be installed in the places without fire,explosion,serious filth,and chemical erosion and violent vibration.

  Main Technical Specification
S.NNameUnitData
1Rated voltagekV12
2Rated frequencyHz50/60
3Rated currentA63063012501600
1000100016002000
1250125020002500

 

 

 
3150
4Rated short circuit breaking currentkA202531.540
5Rated peak withstand currentkA506380100
6Rated short-circuit durationS4
7Rated power frequency
withstand voltage
Between phases,
phase to ground
kV42
Between gapskV48
8Rated lightning impulse
withstand voltage
Between phases,
phase to ground
kV75
Between gapskV85
9Rated operating sequence
 
O-0.3S-CO-180S-CO
     O-180S-CO-18S-CO
             (above 40kA)
10Rated breaking current of single capacitor bankA630
11Rated breaking current of bank to bank capacitor bankA400
12Electrical endurance classCycle30
13Mechanical enduranceCycle10000
14Clearance between open contactsmm11±1
15Contact stroke of contactsmm4±1
16Out of simultaneity of CO operation of three polesms≤2
17Contact bouncing duration at closing operationms≤2
18Closing timems50~100
19Opening timems20~60
20Average closing speedm/s0.6±0.2
21Average opening speedm/s1.1±0.2
22Main circuit resistance of each poleμΩ≤40≤30
23DC component
 
50%(Max.)
Zn28A-12 Indoor Vacuum Circuit Breaker
Zn28A-12 Indoor Vacuum Circuit Breaker
Zn28A-12 Indoor Vacuum Circuit Breaker
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Mr. Boxuan Li
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