Alternating-current watt-hour meters (for connection through instrument transformer) -- Part 2: Measuring instruments used in transaction or certification
This Standard specifies the induction type and electronic normal watt-hour meters and DC watt-hour meters which are used for measurement in transaction or certification in Japan, and used in combination with instrument transformers in single-phase two-wire system, single-phase three-wire system ,three-phase three-wire system and three-phase four-wire system circuits(hereafter referred to as "meters").