janitza UMG 512, Руководство по эксплуатации и технические данные

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UMG 512
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Please note!
Operating equipment connected to the
analogue inputs (residual current and tem-
perature measurement) must feature rein-
forced or double insulation 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.
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.
Failure monitoring
The UMG 512 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.