摘要
介绍了目前国内电动机保护所采用过流保护的情况,认为其判据已不能满足用户安全生产需要。通过对电动机电流特性的分析,提出了负序电流分量闭锁过流保护的新逻辑判据,并用实例进行了验证。
The over-current protection adopted in domestic motor protection at present was introduced,and it is considered that the criteria of the protection can not meet the requirement of user safety production.According to the analysis of the motor current characteristics,a new over-current protection logic criterion with negative sequence current latch was proposed and verified by practical example.
出处
《华电技术》
CAS
2012年第12期6-8,79,共3页
HUADIAN TECHNOLOGY
关键词
电动机
电流特性
负序电流
过流保护
判据
motor
current characteristics
negative-sequence current
over-current protection
criterion
