利用单片微机保护交流电动机的原理分析与计算

The Principle Analysis and Calculation to Protect AC Motor by Monolithic Microcomputer

电动机综合保护器 SPEM可以完成对电动机过载、短路 (瞬动 )、断相、电压不平衡、接地等多种故障的保护 ,本文对德国 ABB公司生产的电动机综合保护器 SPEM的测量原理。

The synthetic protective equipment of a motor can carry out various fault protections of motor overload,short (ircuit cinstantaneous action),open phase,unbalance voltage,earth etc.The paper carries out analysis and calculation for the measuring principle and sampled data of the synthetic protective equipment of the motor SPEM which is made in ABB company of Germany.