www.janitza.com UMG 103-CBM
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10.2 Measured current
The device:
· Is designed for the connection of current trans-
formers with secondary currents of ../1 A and
../5 A.
· Does not measure DC currents.
The factory-set current transformer ratio is 5/5 A
and must be adapted to the current transformers
used as needed.The current transformers require a
basic insulation according to IEC 61010-1:2010 for
the nominal voltage of the circuit.
1. Short-circuit all current transformer outputs
except one.
2. Compare the current measured by the device
(if necessary via the GridVis software) with the
applied input current.
- The currents must match after taking the cur-
rent transformer ratio into account.
- At the short-circuited current measurement
inputs, the value measured must be approx.
0 amperes.
CAUTION
Risk of injury or damage to the meter due to
high measurement currents at the connections
of the current transformers!
High measurement currents can cause tempera-
tures of up to 80 °C (176 °F) on the connections of
the current transformers
· Use wiring that is designed for an operating
temperature of at least 80 °C (176 °F)!
· The current transformers can be hot even af-
ter the power supply has been switched off.
Allow the connections of the current trans-
formers and the connecting cables to cool
down before touching them!
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