Research On Intelligent Protective Unit For Electrical Equipment Used In Coal Mine

In this paper, both electronic technique and microprocessor technique are used in intelligent protection. Drawing on ripe experience of microprocessor relay protection in power system, a new intelligent protective unit provided with protection, control, measuring, display, setting, self-diagnosis and communication function and so on has been developed. The device also have protective steps of leakage locking, short-circuit, overload, phase-failure, under-voltage, over-voltage and so on. And it also could display operation and fault complexion using liquid crystal display and it also could have the system for inquiring about fault and communication. Software programming has used modularization configuration for upgrading easily. And anti-interference of the protective device has also been studied in the paper.