Commonly used mobile substation high voltage isolation, low feed control mode

With the development of mining automation technology for coal mine power system reliability, security and continuity of the increasingly high demand . However, the original use of coal mine mobile substation high and low side switches with many problems . First of all, high and low voltage flameproof existing domestic leakage  mcb circuit breaker  malfunction different levels prevailing situation , not only caused a lot of unnecessary face power outage , but also to find the point of failure workers bring great trouble , serious affected production . Secondly, the original use of domestic coal mine with a commonly used mobile substation high voltage isolation , low feed control mode. High pressure switch is load switch , not breaking fault current ; low pressure side of the vacuum feed switch , breaking current is large . As well as to the low voltage winding transformer  Voltage stabilizer  failure can not be breaking the dead zone . Again, most do not have an existing switch network communication function , the workers only for high-voltage switch for close viewing and operation. To solve the above problems, the design and development project based on PLC control intelligent protection  electric meter  substation with high and low side switches. High voltage distribution switchgear with vacuum circuit breakers, low-voltage side of the feeder switch is not installed electrical protection box . High voltage distribution switch with overload, short circuit, phase , overvoltage , undervoltage, overtemperature protection function