1 Scope
This part of IEC 62626 applies to enclosed switches-disconnectors with rated voltages up to 1 000 V a.c. for repair and maintenance work or cleaning
work in load circuits. Devices within the scope of this standard are derived from
switch-disconnectors according to IEC 60947‑3 . Enclosed switch-disconnectors in this standard are suitable for isolation according to IEC 60947 series and are not supposed to be equipped with means for remote control or automatic switching
to avoid unexpected or accidental start. These devices are not intended to be used
for operational switching, quick start and stop or jogging.
NOTE 1 However, these kind of devices can provide the possibility to switch off electrical
equipment (even in a critical situation or not).
Devices within the scope of this standard provide isolation of electrical equipment,
especially in motor circuits, during repair and maintenance or cleaning works.
Enclosed switch-disconnectors for various applications to provide isolation of electrical equipment during repair
and maintenance work, named “maintenance switches”, are designated hereafter as devices
with:
different classes;