Over deze norm
Is applicable to switches for use in equipment for telecommunications and in electronic devices employing similar techniques. The switches covered have a rated voltage and a rated current not exceeding 500 V and 5 A, respectively. Specifies the terminology, climatic categories, creepage and clearance distances, ratings, marking, type designation and type tests.
||Thermal time delay switches for use in equipment for telecommunication and in electronic applications employing similar techniques. Part 1: General requirements and measuring methods