Design of Mine-used Small Current Grounding Selector of High-voltage Based on Transient Signal and FPGA

Through analyzing defects and its causes of existing small current grounding selector of high-voltage in coal mine,the paper introduced a new type of small current grounding line selection principle in high-voltage based on transient signal.And based on the principle,a mine-used small current grounding selector of high-voltage was developed with FPGA chip.The test result showed that the selector has high reliability and quick respond speed.