1 Scope
This standard applies to low-voltage switchgear and controlgear assemblies with a
rated voltage not exceeding AC 1 000 V or DC 1 500 V. It sets out the requirements
for the provision of additional features to provide protection against electric shock
from direct contact with hazardous live parts only for skilled and instructed persons when they are required to manually actuate
devices within the assembly and where a level of protection for the operating face
of not less than IPXXB cannot be achieved. These devices are those only accessible
via a door or cover requiring a key or tool to open it or in an assembly located in
an area set apart and where the access to that area is restricted solely to skilled
or instructed persons.
This standard does not apply to
-
– manually operated devices and their locations where access is available to ordinary
persons,
-
– low-voltage switchgear and controlgear assemblies where the operating voltage does
not exceed AC 50 V or DC 120 V and there is protective separation, in accordance with
EN 61140, between these circuits and any other circuits,
NOTE Voltages generated by means of auto-transformers, potentiometers, semiconductor components
etc. do NOT meet these requirements.
-
– low-voltage switchgear and controlgear assemblies where protection of persons is provided
by limitation of steady-state touch current or charge in accordance with EN 61140.