CEI EN 62626-1

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:

a) different classes;

b) characteristics of each class;

c) minimum test requirements;

d) information to be marked on the equipment or made available
by the manufacturer, for example in the catalogue.

NOTE 2 This standard does not specify additional requirements
that are necessary for the application of these switches, for
example, in explosive atmospheres (e.g. ATEX in Europe).