scope:

This standard states general requirements for the insulation of electrical relays used in many of the electrotechnical fields covered by the IEC. This standard applies also to associated ancillary devices such as shunts, series resistors, transformers, etc., used and tested together with electrical relays as above, except where the devices are covered by other IEC publications. The object of this standard is: - to define the terms used which relate to the insulation of electrical relays; - to specify requirements for voltage tests (including impulse withstand tests) and insulation resistance tests; - to provide guidance for the selection of degrees of severity for clearances and creepage distances and other aspects related to the insulation of electrical relays.