hager KEH31D00S3LMA, System Manual

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Glossary
Technical changes reserved 89
Parts of EN 61439 standard
Part of
European standard Content
EN 61439-1 Low-voltage switchgear and controlgear assemblies -
Part 1: General rules
EN 61439-2 Low-voltage switchgear and controlgear assemblies -
Part 2: Power switchgear and controlgear assemblies (PSC)
EN 61439-3 Low-voltage switching controlgear assemblies -
Part 3: Distribution boards intended to be operated by ordinary
persons
EN 61439-4 Low-voltage switchgear and controlgear assemblies -
Part 4: Particular requirements for assemblies for construction sites
(ACS)
EN 61439-5 Low-voltage switchgear and controlgear assemblies -
Part 5: Assemblies for power distribution in public networks
EN 61439-6 Low-voltage switchgear and controlgear assemblies -
Part 6: Busbar trunking systems (busways)
EN 61439-7 Low-voltage switchgear and controlgear assemblies -
Part 7: Assemblies for specific applications such as marinas,
camping sites, market squares, electrical vehicles charging stations
Supplements for parts of the EN 61439 standard
Part of
European standard Content
EN 61439-1
Supplement 1 General rules:
Guidance to specifying assemblies
EN 61439-1
Supplement 2 General rules:
A method of temperature-rise verification of low-voltage switchgear
and controlgear assemblies by calculation
EN 61439-2
Supplement 1 Power switchgear and controlgear assemblies:
Guide for testing under conditions of arcing due to internal fault
Rated diversity factor RDF
The rated diversity factor (RDF), as the characteristic properties of the switchgear
and controlgear assembly, is particularly important for the safe operation of
switchgear and controlgear assembly. The rated diversity factor is the share of
the respective rated currents that any possible combination of outgoing current
circuits can simultaneously and permanently carry without the switchgear and
controlgear assembly overloading. An essential prerequisite here is that the load
of the incoming unit must not exceed the rated current of the incoming unit.
In accordance with EN 61439-6, 5.4, a rated diversity factor of 1 is assumed for
the entire busbar trunking system BTS (unless stated otherwise). All tap-off units
may be permanently and simultaneously loaded with their rated current for this.
At the same time, the limits for the busbar trunking runs and the supply unit(s)
must be observed. The mutual interference between tap-off units is considered to
be negligible. The number of main circuits in particular must be taken into
account for the respective rated diversity factor for tap-off units with more than
one outlet-side main circuit (details in EN 61439-6, 5.4).