janitza UMG 509, Руководство по эксплуатации и технические данные

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UMG 509
c
Please note!
O p e r a t i n g e q u i p m e n t c o n n e c t e d
to the analogue inputs must feature
r e i n f o r c e d o r d o u b l e i n s u l a t i o n
to the mains supply circuits!
Example - temperature sensor:
A temperature sensor in close proximity
to
non -isolated mains cables should measure
within a 300V CAT III network.
Remedy:
The temperature sensor must be equipped
with reinforced or double insulation for 300V
CAT III. This equates to a test voltage for the
temperature sensor of 3000V AC (duration
1 min.).
Example - residual current transformer:
A residual current transformer should measure
on isolated mains cables within a 300V CAT III
network.
Remedy:
The insulation of the mains cables
and the insulation of the residual current
transformer must fulfil the basic insulation
requirements for 300V CAT III. This equates to
a test voltage of 1500V AC (duration 1 min.) for
the insulated mains cables and a test voltage
of 1500 V AC (duration 1 min.) for the residual
current transformer.
Failure monitoring
The UMG 509 monitors the ohmic resistance at the
residual current measurement inputs.
If the ohmic resistance is greater than 300 Ohm, there
is a failure (e.g. cable breakage) with the residual current
monitoring.