QJZ series mine explosion-proof and intrinsically safe intelligent double-speed, doublecircuitvacuum electromagnetic starter is ideal for coal mines in AC50Hz. 1140V, 660V powersupply circuits, it can be used to control start, stop, reserve rotation and double-speedswitching etc of 3-phase squirrel-cage AC asynchronous motors and AC double-winding anddouble-speed motors, it is attached KJ2000 mine electric power automatic control andcomprehensive measurement and monitor system to realize telemetry, telecommunication remote control and remote regulation and that no person on duty is available.
All English blue backlight LCD display;
16-bit single-chip microcomputer as central controller;
Various protective functions for overload, short-circuit, over-voltage. under-voltage,current leakage lockout and temperature protection of the motor;
Available as a double-speed switch or a double-circuit switch;