This part of the IEC 61812 series applies to time relays and coupling relays for industrial applications (e.g. control, automation, signal and industrial equipment) and for automatic electrical controls for use in, on, or in association with equipment for residential and similar use. The term relay as used in this document comprises all types of relays with specified time functions and coupling relays, other than measuring relays. This document defines type test and routine test to confirm the service condition.