Low-voltage switchgear and controlgear. Part 5-6. Control circuit devices and switching elements. DC interface for proximity sensors and switching amplifiers (NAMUR)
Safety of power transformers, power supplies, reactors and similar products. Part 2-15. Particular requirements and tests for isolating transformers for the supply of medical locations
Automatic rotational frequency control systems (ARFCS) of marine, locomotive and industrial reciprocating internal combustion engines. General specifications
