低压电动机相间短路保护措施探讨
Moder Architecture Electric（2014）
Abstract
DL/T 5153-2005《火力发电厂厂用电设计技术规定》中第9.7.1条对低压电动机相间短路保护做出要求.长距离供电电动机的保护灵敏系数有可能不满足该条款要求.分析讨论了4种解决措施:增大电缆截面、增大变压器容量或降低变压器阻抗、供电脱扣器整定短延时及另装继电保护动作于分励线圈.推荐采用脱扣器短延时或另装继电保护方案.
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