DD862 single phase watt-hour meter is an inductionmeter which is applicable to measure the rated frequency of 50 Hz, and power loss of single-phase intercourse grid.
Structures of induction electric energy meter and electron electric energy meter are introduced in chapter two, and operation principles are specially explained in detail.
本文第二章介绍了感应式和电子式电能表的结构，说明了这两种电能表的计量原理。
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The influence of frequency deviate or harmonics to the traditional kilowatt hour meter of electromagnetic induction type is analysed in the paper.