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Connection
4.1 Safety information
Some of the following tasks are carried out when hazardous voltage is present. For this
reason, they must only be carried out by qualified personnel who are familiar with and
follow the safety regulations and precautions.
Wear the prescribed protective clothing. Observe the general equipment regulations and
safety regulations for working on high-voltage installations (e.g. DIN VDE, NFPA 70E as
well as national or international regulations).
The limits given in the technical data must not be exceeded even during commissioning or
testing.
The secondary connections of intermediate current transformers must be short-circuited at
the transformers before the power supply lines to the device are interrupted.
The polarity and phase assignment of the instrument transformers must be tested. Before
connecting the device, you must check whether the system voltage matches the voltage
specified on the type plate.
Check that all connections are correctly made before startup.
Before power is applied to the device for the first time, it must have been located in the
operating area for at least two hours in order to reach temperature balance and avoid
humidity and condensation.
Condensation on the device is not permissible during operation.
18
WARNING
Expansion module I(N), I(Diff), analog
Manual, 04/2017, L1V30408520AG-01
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