Direct acting indicating analogue electrical measuring instruments and their accessories. Special requirements for phase meters, power factor meters and synchroscopes— 22 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories - Part 1: Definitions and general requirements common to all parts— 113 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories, Specification for special requirements for phase meters, power factor meters and synchroscopes— 16 стр.
Direct acting indicating analogue electrical measuring instruments and their accessories, Specification for special requirements for phase meters, power factor meters and synchroscopes— 16 стр.
