This Korean Industrial Standard specifies the var —hour meters with or without transmitter (hereinafter referred to as the "meters") which are used in combination with instrument transformer or are used for the summation measurement of energy in multicircuits of current composing system, in three-phase 3 —wire system and three —phase 4 —wire system.
Further, matters other than specified in this standard shall be in accordance with KS C 1201 (General Rules for Electricity Meters). Also, for meters with auxiliary device, this standard shall apply to the var — hour meter under the condition where the auxiliary device is attached.
In this Standard, instrument transformers used in combination with multiciuit summation meters shall be in accordance with Appendix 1, and the combination with transformer and allowable limit of overall error shall be in accordance with Appendix 2.
Remarks 1. This Standard shall be appile when the voltage and current have appoximately sinusoidal waveform.
2. This Standard shall be applied solely to the meters with a reverse rotation or reverse measuring prebenting device.
3. The units and numerical values given in { }in this standard are in accordance with the International System of Units (SI), and appended for reference.