朱宝峰（华晨宝马汽车有限公司，沈阳市 110044）

孙文华（中国汽车工业工程有限公司，天津市 300113)

朱宝峰   孙文华

Discussion on Overcurrent Protection Settings for Distribution Transformers

ZHU Baofeng(BMW Brilliance Automotive Ltd.,Shenyang 110044，China)

SUN Wenhua(Automotive Engineering Corporation,Tianjin 300113，China)

Abstract：Suggestions for setting three‑stage overcurrent protection for distribution transformers are proposed;an inverse time overcurrent protection setting scheme is proposed for two situations where the medium voltage protection device is with or without the minimum action time setting function.

Key words：three‑stage overcurrent protection;definite time overcurrent protection;current instantaneous trip protection;time limited current instantaneaus protection;inverse time overcurrent protection;sensitivity coefficient;minimum action time;time current coordination curve

摘　要：针对配电变压器的三阶段过电流保护提出设置建议；针对中压保护装置具备最小动作时间设置功能和不具备最小动作时间设置功能两种情况，提出反时限过电流保护设置方案。

关键词：三阶段过电流保护； 定时限过电流保护；电流速断保护；限时电流速断保护；反时限过电流保护；灵敏度系数；最小动作时间；时间电流配合曲线

中图分类号：TM421                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.09.007