NBN 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).