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Zn28A-12 Indoor Hv Vacuum Circuit Breaker

Basic Info

Model No.:  ZN28A-12

Product Description

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 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.N Name Unit Data
1 Rated voltage kV 12
2 Rated frequency Hz 50/60
3 Rated current A 630 630 1250 1600
1000 1000 1600 2000
1250 1250 2000 2500



3150
4 Rated short circuit breaking current kA 20 25 31.5 40
5 Rated peak withstand current kA 50 63 80 100
6 Rated short-circuit duration S 4
7 Rated power frequency
withstand voltage
Between phases,
phase to ground
kV 42
Between gaps kV 48
8 Rated lightning impulse
withstand voltage
Between phases,
phase to ground
kV 75
Between gaps kV 85
9 Rated operating sequence
O-0.3S-CO-180S-CO
     O-180S-CO-18S-CO
             (above 40kA)
10 Rated breaking current of single capacitor bank A 630
11 Rated breaking current of bank to bank capacitor bank A 400
12 Electrical endurance class Cycle 30
13 Mechanical endurance Cycle 10000
14 Clearance between open contacts mm 11±1
15 Contact stroke of contacts mm 4±1
16 Out of simultaneity of CO operation of three poles ms ≤2
17 Contact bouncing duration at closing operation ms ≤2
18 Closing time ms 50~100
19 Opening time ms 20~60
20 Average closing speed m/s 0.6±0.2
21 Average opening speed m/s 1.1±0.2
22 Main circuit resistance of each pole μΩ ≤40 ≤30
23 DC component
50%(Max.)
Zn28A-12 Indoor Hv Vacuum Circuit Breaker
Zn28A-12 Indoor Hv Vacuum Circuit Breaker
Zn28A-12 Indoor Hv Vacuum Circuit Breaker

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