EN IEC 60947-4-1:2025

IEC 60947-4-1:2023 is applicable to the following equipment:- electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD);- actuators of contactor relays;- contacts dedicated exclusively to the coil circuit of the contactor or the contactor relay;- dedicated accessories (e.g. dedicated wiring, dedicated latch accessory);intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC.This fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:a) objective in the scope;b) instantaneous only motor protective switching device IMPSD (3.5.33);c) kinds of equipment (5.2.1);d) methods of overload protection of motors (5.2.6);e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2);f) separately mounted overload relay of a starter (in 5.7.3 b));g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w));h) reference to IEC TS 63058 for environmental aspects (in 6.4);i) wiring subject to movement (in 8.1.3);j) use of voltage transient limiting device (8.1.18);k) accessible parts subject to temperature limits (in 8.2.2.3);l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4);m) reference to IEC TR 63216 with different EMC environments (8.3.1);n) reference to IEC TR 63201 for the embedded software design (8.4);o) reference to IEC TS 63208 for cybersecurity aspects (8.5);p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2);q) update of Annex C including rational about AC-3e;r) determination of the critical load current for photovoltaic applications (M.8.7).