janitza UMG 103-CBM, Руководство пользователя и технические данные

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UMG 103-CBM www.janitza.com
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7.5 Current measurement
The device:
·Measures current exclusively via current trans-
formers.
·Does not measure DC currents.
·Allows the connection of current transformers
with a transformer ratio of ../1 A and ../5 A for
current measurement inputs.
·Is factory-set to a current transformer ratio of
5/5 A and must be adapted to the current trans-
formers employed using the GridVis
®
software if
necessary.
·Each current measurement input can be loaded
with 6 A continuously or with 60 A for 1 second.
The current transformers require a basic insu-
lation according to IEC 61010-1:2010 for the
nominal voltage of the circuit.
Fig. Connection example, “Current measurement via current
transformer”.
WARNING
Risk of injury due to electrical voltage at current
transformers!
Current transformers which are operated
exposed on the secondary side can carry haz-
ardous live high voltage peaks which can lead to
serious bodily injury or death.
Therefore please abide by the following:
· Switch off your installation before commenc-
ing work! Check to be sure it is de-energized!
· Avoid exposed operation of the current
transformers.
· Short circuit unloaded current transformers.
· Before interrupting the supply of power, it is
essential to short the secondary connections
of the current transformers.
· If there is a test switch which automatically
short-circuits the secondary current trans-
former lines, it is sufficient to set it to the
“Test” position, provided that the short-cir-
cuiters have been checked beforehand.
· Only use current transformers with basic
insulation according to IEC 61010-1:2010.
· Fix the attached screw terminal to the device
with the two screws.
· Even current transformers rated as safe for
exposed operation are dangerous to touch if
they are operated exposed.
· Observe the documentation for the current
transformers!
WARNING
Risk of injury due to high currents and high
electrical voltages!
Severe bodily injury or death can result from:
·Touching bare or stripped leads that are ener-
gized.
·Dangerous live current measurement inputs of
the device and at the current transformers.
Therefore, please note for your system:
·
Disconnect the supply of power before start-
ing work!
·
Secure it against being switched on!
·
Check to be sure it is de-energized!
·
Ground and short circuit! Use the ground
connection points with the ground symbol for
grounding!
·
Cover or block off adjacent live parts!
L2
L3
L1
S2 S1
S2 S1
S2 S1
B A C