LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES – PART 3: PARTICULAR REQUIREMENTS FOR LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES INTENDED TO BE INSTALLED IN PLACES WHERE UNSKILLED PERSONS HAVE ACCESS FOR THEIR USE – DISTRIBUTION BOARDS (IEC 60439-3:2001, IDT)
This Malaysian Standard gives supplementary requirements for such enclosed distribution boards (DBU), which are stationary, type tested assemblies (TTA) for indoor use, containing protective devices and intended for use either in domestic (household) applications or in other places where unskilled persons have access for their use. Control and/or signalling devices may also be included. They are for use on a.c.,with a nominal voltage to earth not exceeding 300V.The outgoing circuits contain short-circuit protective devices,each having a rated current not exceeding 125A with a total incoming load current not exceeding 250A.
NOTE. The nominal voltage to earth in an IT system is taken as the nominal voltage of the system.
Unskilled persons normally have access to these assemblies, e.g. for switching operations and for replacing fuse-links.
Published
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PDF
10/05/2019
46
NSC 05 - Generation, Transmission & Distribution of Energy
