This model integrates operation mechanism with the circuit breaker, well arranged, looking beautiful and compact. 2.This model can be operated frequently, able to break and reclose fast many times. 3.Two types of installations (fixed or moved) meet the demands of different switchgears.(VS1)-12 is a HV indoor vacuum circuit breaker working as a protection and control unit of power grid equipment and industrial electric equipment in power system of rated voltage from 7.2KV to 12KV. It meets the requirements of GB/T1984-2014 (AC HV circuit breaker) and JB355-1996 (3.6KV-40.5KV indoor AC HV vacuum circuit breaker). It can be used in switchgears of KYN28(GZS1), XGN and GG-1A.
The operating mechanism is the trip-free stored energy type with independent opening and closing regardless of the operator's action. The operating mechanism is widely used in all VD4-R series circuit-breakers with frontal control.
The circuit-breaker can be remote controlled when fitted with dedicated electrical accessories (gearmotor, opening and closing release).
The operating mechanism, the three poles and the current sensors (if provided) are installed on a metal frame without wheels. The construction is particularly compact, sturdy and of limited weight.
VD4-R series circuit-breakers with lateral operating mechanisms are life-long sealed pressure devices.(Standards IEC 62271-100)
|Vacuum circuit-breaker||**4/R 12||**4/R 17||**4/R 24|
|Rated insulation voltage||Us(kV)||12||17.5||24|
|Withstand voltage at 50Hz||Ud(kV)||28||38||50|
|Impulse withstand voltage||Up(kV)||75||95||125|
|Rated thermal current||Ir(A)||630||800||1250||630||800||1250||630||800||1250|
|Rated duty breaking capacity
(symmetrical rated short-circuit current)
|Short-time withstand current(3s)||Ik(kA)||12.5||/||/||12.5||/||/||12.5||/||/|
|Closing pushbutton||**4circuit-breakers with lateral operating mechanism are available in
the following versions:
|Manually charging handle||230||230|
|Delivery terminal box||300||300|