IEC 60051-5 (1985) BS EN 60051-5 (1989) Specification for special requirements for phase meters, power factor meters and synchroscopes
简介:IEC 60051-5 (1985) BS EN 60051-5 (1989)
Direct acting indicating analogue electrical measuring instruments and their accessories —
Part 5: Specification for special requirements for phase meters, power factor meters and synchroscopes