- Model NO.: ZN28-A
- 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 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
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
|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|
phase to ground
|8||Rated lightning impulse|
phase to ground
|9||Rated operating sequence||O-0.3S-CO-180S-CO|
|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|
|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|
|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|