This series mine explosion-proof type reversible vacuum electromagnetic starter isapplicable in AC 50Hz distribution system of three-phase indirect neutral-point earthingwith rated voltage of 1140V, 660V or 380V in underground coal mines with explosive anddangerous gas(methane) and coal dust. It is used to control remote forward and reversalrotation of three-phase squirrel-cage asynchronous motor with rated current of 60A, 30A.Meanwhile, it also offers protection to motor and relative circuit.
It adopts dialing and lever combined setting, which can modify and set rated current.
Various protective functions like overload, short circuit, under voltage, over voltage, lossof phase, leakage lockout, phase imbalance etc.
Remote control of forward and reverse rotation(reversible)
4. Technical Parameter
Rated voltage (V): 660, 380
Rated current (A): 60, 30
Rated frequency (Hz): 50
Power of controlled motor: 50kW(60A, 660V) 28kW(60A, 380V) 25kW(30A, 660V) 14kW(30A, 660V)
Start voltage: 75%Ue-110%Ue
Leakage lockout value (kΩ): 40+20%(1140V); 22+20%(660V); 7+20%(380V)