The invention relates to a mining
flame-proof type selective leakage protector. The mining
flame-proof type selective leakage protector is characterized in that the mining
flame-proof type selective leakage protector comprises a
single chip microcomputer, a
power supply unit, a
liquid crystal display module, a
signal detecting and
processing circuit, a communication module and a drive
tripping circuit. The
power supply unit is connected with the
single chip microcomputer and the
liquid crystal display module and supplies power for the
single chip microcomputer and the
liquid crystal display module, the single
chip microcomputer is connected with a zero-sequence current mutual
inductor arranged on a power supply
system through the
signal detecting and
processing circuit to achieve an electric leakage detecting function, the single
chip microcomputer is connected with a
tripping executing mechanism on the power supply
system through the drive
tripping circuit to achieve a tripping
control function, and the single
chip microcomputer is connected with a remote monitoring
host machine to achieve a remote monitoring function. The mining flame-proof type selective leakage protector is reasonable in design, achieves the function of classified selective electric leakage protection of a
trunk line and a
branch line of the power supply
system with no neutral ground in an underground
coal mine, improves the
automation degree and the power supply quality of the
coal mine, and better ensures personal safety and the safety of machinery equipment.