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Vacuum Circuit Breaker, High-Voltage Vacuum Circuit Breaker, Indoor High Voltage Vacuum Circuit Breaker manufacturer / supplier in China, offering Zn28-a Series of Indoor Hv Vacuum Circuit Breaker, Zw20-12kv Outdoor High Voltage Vacuum Circuit Breaker, Vib-24 Indoor Vacuum Circuit Breaker (common insulated cylinder) and so on.

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Supplier Homepage Products 12kv-Vacuum Circuit Breaker Zn28-a Series of Indoor Hv Vacuum Circuit Breaker

Zn28-a Series of Indoor Hv Vacuum Circuit Breaker

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Min. Order: 1 Piece
Production Capacity: 16000sets/Year
Transport Package: Non-Solid Wooden Case for Export Shipment
Payment Terms: L/C, T/T
Breaking Capacity: High Voltage Circuit Breakers
Operation: Electric Type
Speed: High-Speed Circuit Breaker
Arc-extinguishing Medium: Vacuum
Installation: Open Frame
Structure: ACB

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Basic Info

Model NO.: ZN28-A
Poles Number: 3
Type: Circuit Breaker
Function: Circuit-Breaker Failure Protection
Certification: VDE, ISO9001-2000, CE, CB, CCC
Rated Voltage: 12kv
Rated Frequency: 50/60Hz
Rated Current: 630/1250/1600/2000/2500/3150A
Trademark: Longxiang Electric
Specification: IEC: M2-E2-C2
Origin: China Baoji
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
1Rated voltagekV12
2Rated frequencyHz50/60
3Rated currentA63063012501600

4Rated short circuit breaking currentkA202531.540
5Rated peak withstand currentkA506380100
6Rated short-circuit durationS4
7Rated power frequency
withstand voltage
Between phases,
phase to ground
Between gapskV48
8Rated lightning impulse
withstand voltage
Between phases,
phase to ground
Between gapskV85
9Rated operating sequence
             (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
Zn28-a Series of Indoor Hv Vacuum Circuit Breaker
Zn28-a Series of Indoor Hv Vacuum Circuit Breaker
Zn28-a Series of Indoor Hv Vacuum Circuit Breaker

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