According to relative standards “GB18802.1 and GB50057”, the front return circuit of Surge Protective Device(short for SPD) must be in series connection with current protector. Since the fuse and circuit breaker can’t coordinate and cooperate, it may lead to fire and accident of Equipment damage from lightning stroke when the SPD breaks down or occurs short circuit. Special Circuit Breaker(short for SCB) is specially designed for SPD. It doesn’t disconnect under high impulse current and can disconnect quickly when there is power current after SPD breaks down, which can eliminate the associated potential risks.
Rated Working Voltage
Impact Endurance Capacity
Power Frequency Action Current In(50/60Hz)
Rated Limit Short-circuit Capacity Icu
Power Frequency Short-circuit Current Break-time
Shell Protection Class
Temperature: -25～+70℃ Humidity: ≤95%
1.DK-T1 Special Circuit Breaker is suitable for Surge Protective Device(SPD) of the Class I Testing.
2.DK-T2 Special Circuit Breaker is suitable for Surge Protective Device(SPD) of the Class II Testing.
3.DK-T3 Special Circuit Breaker is suitable for Surge Protective Device(SPD) of the Class III Testing.