采用相敏短路保护,短路电流设定值比传统计算方法计算值要小的多。传统计算方法计算出短路电流的整定值后,而现在采用相敏短路保护只要取其系数整定就行了,而且确保短路时保护动作,电机起动时,即使线路中的电流大于整定值,保护也不可能动作,提高了对短路保护的可靠性和安全性。 Using phase-sensitive short-circuit protection, short-circuit current set value is much smaller than the traditional calculation method to calculate the value. Traditional calculation method to calculate the short-circuit current setting value, and now use phase-sensitive short-circuit protection as long as its coefficient setting on the line, and to ensure short-circuit protection action, the motor starts, even if the current line is greater than the set value, the protection is not May act, improve the reliability and safety of short circuit protection.