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Vacuum Circuit Breaker, Breaker, Circuit Breaker manufacturer / supplier in China, offering Zn28-12k Fixed Type of Indoor High-Voltage 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 Zn28-12k Fixed Type of Indoor High-Voltage Vacuum Circuit Breaker

Zn28-12k Fixed Type of Indoor High-Voltage Vacuum Circuit Breaker

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Min. Order: 1 Piece
Port: Shanghai, China
Production Capacity: 16000sets/Year
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: Fixed
Structure: ACB

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Basic Info

Model NO.: ZN28-12K
Poles Number: 3
Type: Circuit Breaker
Function: Circuit-Breaker Failure Protection
Certification: VDE, ISO9001-2000, CE, CB, CCC
Rated Voltage: 12kv
Rated Current: 630/1250/1600/2000/2500/3150A
Rated Frequency: 50/60Hz
Trademark: Longxiang Electric
Transport Package: Non-Solid Wooden Case for Export Shipment
Specification: IEC: M2-E2-C2
Origin: China Baoji
HS Code: 85389000

Product Description

Fixed Type of Indoor High Voltage Vacuum Circuit Breaker

General Description
 ZN28A-12 fixed type indoor HV vacuum breaker is used for many kinds of switchgear like 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 CD17or CT19 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.Convenient for matching with switchgear;convenient and reliable operation:compulsive mechanical interlock way is adopted:meet the "Five Preventions"function.
  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, chemical erosion and violent vibration.

  Main Technical Specification
1Rated voltagekV12
2Rated frequencyHz50/60
3Rated currentA630630  1250  1600



4Rated short circuit breaking current   kA  20   25   31.5   40
5Rated peak withstand current   kA  50   63    80   100
6Rated short-circuit duration    s                            4
7Rated power frequency withstand voltageBetween phases,
phase to  ground
   kV                           42
Between gaps   kV                           48
8Rated lightning impulse withstand voltageBetween phases,
phase to ground
   kV                            75
Between gaps   kV                            85
9Rated operating sequence
10Rated source voltage of opening and closing circuit   V~220/-110;-220/110
11Rated breaking current of single capacitor bank   A                           630
12Rated breaking current of bank to bank capacitor bank   A                           400
13Electrical endurance classCycle                             30
14Mechanical enduranceCycle                          10000
15Operating mechanism type
16Clearance between open contactsmm11±1
17Contact stroke of contacts  mm4±1
18Out simultaneity of CO operation of three poles  ms≤2
19Contact bouncing duration at closing operation  ms≤2
20Closing time   ms50~100
21Opening time   ms20~60
22Average closing speed   m/s0.6±0.2
23Average opening speed   m/s1.1±0.2
24Main circuit resistance of each pole   μΩ≤40≤40   ≤40   ≤30
25DC component

  Overall outline drawing
Zn28-12k Fixed Type of Indoor High-Voltage Vacuum Circuit Breaker
Zn28-12k Fixed Type of Indoor High-Voltage Vacuum Circuit Breaker
Zn28-12k Fixed Type of Indoor High-Voltage Vacuum Circuit Breaker

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