Mining Explosion Proof Dual Power Multi-loops Combination Switch

Purposes

QBZ series of mine explosion-proof double-power-supply and double-blower wind and electricity interlocking assembly switch is ideal for use in AC 50Hz, 1140V, 660V or 380V power supply system in coal mines for automatic switching of double-power-supply and double-blower to realize that the two power supplies work together, and to ensure both working blower and standby blower are available for switching in operation, in order to a long-period ventilation in mines. Therefore, it is an ideal ventilation and power supply equipment for coal mines, especially for mines with high concentration of gases.
Protective functions

1) Two independent power supplies and two independent explosion-proof chambers;
2) Double-channel indication of power supply working, stop and examination;
3) During examination, the other chamber shall not be electrified;
4) Protective functions of overload, short-circuit, phase loss, current leakage, undervoltage and overvoltage etc;
5) Switching time: 0~10s adjustable;
6) Protective function of gas, wind and electricity interlocking;
7) Number of branches: 2 branches (The blower is a common axially circulating type blower, and user can select switch according to type of blower).