
Var-hour meters Part 1: General measuring instrument
出版:Japanese Standards Association

专家解读视频
This Japanese Industrial Standard specifies the var-hour meters for general use, namely, var-hour meters used in combination with instrument transformers, var-hour meters for summation measurement of multi circuits of the current composing system, transmitter-incorporating var-hour meters, and transmitter-incorporating var-hour meters for summation measurement of multi circuits of the current composing system, that are in three-phase three-wire system and three-phase four-wire system circuits.