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IEC 61812-1 2nd Edition, May 1, 2011
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Time relays for industrial and residential use – Part 1: Requirements and tests
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This part of the IEC 61812 applies to time relays for industrial applications (e.g. control, automation, signal and industrial equipment).

It also applies to time relays 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 standard comprises all types of relays with specified time functions, other than measuring relays.

NOTE Depending on the field of application of these relays (for example automatic electrical controls for household and similar use, switches for household and similar fixed electrical installations), further standards may be applicable, for example IEC 60730-2-7 or IEC 60669-2-3.