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.