大型电动机高阻抗差动保护故障的分析及处理

Analysis and Treatment of High Impedance Differential Protection Faults of Large Motors

高阻抗差动继电器是反映电机及电缆接地短路故障的保护。某电厂大型电动机(电动给水泵)选用ABB公司所产SPAE010型高阻抗保护继电器作为差动主保护。文章详细介绍了该装置的保护原理,并对运行期间出现的一些故障进行了分析及处理。

High-impedance differential relay is the protection reflecting the grounding short-circuit fault of motors and cables.SPAE010 high impedance protection relay produced by ABB is selected as differential main protection for a large motor(electric feed pump)in a power plant.This paper introduces the protection principle of the device in detail,analyzes and processes some faults during operation.