Mining Explosion proof Starter (QBZ-80)

1. Function
This series mine explosion-proof type vacuum electromagnetic starter is applicable in AC
50Hz distribution system of three-phase indirect neutral-point earthing with rated voltage
Of 1140V, 660V or 380V in underground coal mines with explosive and dangerous
Gas(methane) and coal dust. It is used to control direct start, stop and reversal of threephase
Squirrel-cage asynchronous motor with rated current of 120A. Meanwhile, it also
Offers protection to motor and relative circuit.

2. Characteristics

2.1It adopts dialing and lever combined setting, which can modify and set rated current.
2.2 Various protective functions like overload, short circuit, under voltage, over voltage,
Loss of phase, leakage lockout, phase imbalance etc.

3. Technical Parameter

Rated voltage(V): 660, 380
Rated current(A): 120
Rated frequency(Hz): 50
Power of controlled motor: 100kW(120A, 660V); 55kW(120A, 380V)

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