春晨 JBYH电机引接线 电机引出线

江苏春晨电缆有限公司生产JBYH电机引接线，JBYH电机引接线，

也称零序保护，它是利用接地产生的零序电流使保护装置动作，它主要借助专门的零序电流互感器作用于继电器来实现对接地故障的保护。可分为大电流接地系统的零序保护和小电流接地系统的零序保护两种，对大电流接地故障，实际上是单相短路，过电流保护虽能反应，但灵敏度较低，动作时限长，故需装设专门的接地保护，提高灵敏度。对小电流接地系统，单相接地只是一种不正常运行状态，发生这种故障按规定系统还可继续工作2小时。故这种接地保护一般只作用于信号。

Also known as zero sequence protection, it uses zero sequence current generated by grounding to make the protection device operate. It mainly uses special zero sequence current transformer acting on the relay to realize the protection of grounding fault. It can be divided into zero-sequence protection of large current grounding system and zero-sequence protection of small current grounding system. For large current grounding fault, it is actually single-phase short circuit. Although overcurrent protection can respond, it has low sensitivity and long operation time, so special grounding protection should be installed to improve sensitivity. For the small current grounding system, single-phase grounding is only an abnormal operation state, and the system can continue to work for 2 hours if such a fault occurs. Therefore, this kind of grounding protection generally only acts on the signal.