IEC 60947-5-1 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies to control circuit devices having a rated voltage not exceeding 1 000 V AC (at a frequency not exceeding 1 000 Hz) or 600 V DC.
This edition of IEC 60947-5-1 includes the following significant technical changes:
a) update of the scope structure and exclusions,
b) requirements for control circuits,
c) update of the normal service conditions (e.g. shock and vibration),
d) update of information and marking requirements including environmental information requirements referencing IEC TS 63058:2021,
e) update of the constructional requirements and the corresponding tests considering safety aspects (e.g. artificial optical radiation, security aspects, limited energy source, stored charge energy circuit),
f) update of the EMC requirements according to the generic documents,
g) new requirements for reed contact magnetic switches in Annex D,
h) requirements for class II circuit devices achieved by double or reinforced insulation in Annex F,
i) update of pull-out tests in Annex G,
j) information requirements for audible signalling device in Annex J,
k) insertion of new Annex O.
IEC 60947-5-1:2024 text has been approved in Europe as EN IEC 60947-5-1:2025 without any changes.
