Transformer neutral point overvoltage relaying protection main includs nod gap and arrestor protection . In this paper , principle of parameter choice and different function of above-mentioned protection are analysed .
Adopt overvoltage crowbar , intelligent charging , usage safe , take care of your handset .
采用过压保护电路,智能充电,使用安全,精心呵护您的手机。
The influence of zero-sequence impedance on power-frequency overvoltage of asymmetric eathing fault is researched though comparing surge impedance of different types of acsr as ground-return wires .
通过比较不同型号良导体地线的波阻抗,分析了零序阻抗对不对称接地工频过电压的影响。
Induced overvoltage withstand test and applied voltage withstand test .
感应耐压试验和外施耐压试验。
This type of overvoltage is called lightning incoming wave4 .
此类过电压称为雷电侵入波。
It is safe with overvoltage , shortcircuit and overcurrent protection .
它与过压安全,短路和过流保护。
The path that the overvoltage caused by lightning intruded into the communication equipment and the cause of the equipment damage due to lightning attack were introduced .
介绍了雷电等过电压侵入通信设备的途径以及雷击损坏通信设备的原因。
In a building , how do we provide for protection against overvoltage switching ? What are its origins and magnitude ? How do we protect against it ?