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The functions,characteristics and different kinds of loss-voltage timers are described in this paper,It introduces the questions in actual use,gives some advices on technical management of electric energy metering.

主要介绍了失压计时器的功能、特点、种类,并对实际使用过程存在的问题和在电能计量装置技术管理工作中应注意的问题进行了分析。