The distribution box, switch box is necessary to perform a "machine" "gate" "leakage", powerline end stop using the plug and socket connection to do activities.
配电箱，开关箱有必要履行“一机”“一闸”“一漏电”，电源进线端制止选用插头和插座做活动衔接。
2
It compares the pilot distance protection with powerline carrier (PLC) in the single or double frequency and the differential protection with optical fiber in the loop or chain connection.
比较单频率与双频率载波通道的纵联距离保护和环状与链状连接光纤通道的差动保护方案。
3
In this system, there is no signal lineconnection, only the power supply to the motherboard power connector.