Mining explosion-proof permanent magnetic mechanism high voltage vacuum distribution device
The device is used in coal mines containing explosive gas (methane) and coal dust. It is suitable for the circuit of AC 50Hz, voltage 660V or 1140V, ungrounded three- phase center. To local control or remote control the start and stop of three-phase asynchronous motor, and can be reversed at the stop.
The device adopts control and protection system composed of the programmable controller(PLC) and text display screen. There is a liquid crystal display window to show the operation status and various fault conditions of the protection box. The device with flexible parameter setting, stable quality, sensitive and reliable action performance, intuitive and concise operation and fault picture, has an intrinsically safe control interface, which is convenient for external control of equipment, and compose joint control. The main circuit adopts self- developed VSM-12/1250-25 permanent magnet mechanism high voltage vacuum circuit breaker, with the characteristics of high control current and high breaking short-circuit current level, which is stable to operate and easy to maintain.
With the multiple protection functions as short circuit, overload, leakage and open-phase.