The mechanism of secondary arcextinction by high speed grounding switches (HSGS) is analyzed.
对快速接地开关（HSGS）熄灭潜供电弧的机理进行了分析。
2
NAMDQ USES domestic original compound arc suppression circuit (electronic arcextinction + mechanical arc), greatly improving the device life and stability.
NAMD Q采用国内独创复合式消弧电路电子消弧机械消弧，大大提高了装置的使用寿命和稳定性。
3
It also indicates that the accuracy and reliability of time retardation for arcextinction can be increased by replacing traditional extinction relay with electron extinction circuit.