Current balance type current differential relay 电流平衡式差动电流继电器;差动平衡式电流继电器 Current changer 换流器 Current compensational ground distance relay 电流补偿式接地远距继电器 ..
Frequency changer by means of electric current for calculation limitation.
因变频器以电流为计算限制。
2
The paper introduces a transformation by PLC and frequency-changer in the light of current lashing problem of drawing-oil tube cleaning machine in oil field enterprises.
本文针对油田企业中抽油管清污机中存在的冲击问题，用PLC、变频器等对其控制进行了改造。
3
After illustrating the operation theory of six pulse converter, author gives the calculating method of UHVDC transmission parameters such as operating power, voltage, current and tap changer range.