Connection
4.1 Safety notes
32 Equipment Manual, 09/2022, L1V30415168B-03
Voltage input conductors may be damaged.
The fuses in the voltage measuring inputs are only used for cable protection. Selection of
the fuse depends on the supply cable dimensioning. All commercially available fuses and
automatic circuit breakers up to 16 A (C) or 20 A (B) can be used. Observe the applicable
regulations when selecting the fuse.
We recommend 5SY miniature circuit breakers, 3RV motor starter protectors, or 5SB/3NA
fuses, depending on the cable requirements and connection conditions.
Voltage input conductors must be protected.
The wrong system connection can damage the device.
Failure to heed this warning can result in damage to the device and the system. The
minimum and maximum limits given in the technical data and on the rating plate must not
be exceeded even during startup or testing of the device.
Grounding of current transformers optional.
Always connect the transformers and ground them on the secondary side in accordance with
the applicable regulations. Grounding of the
current transformers on the secondary side is
not necessary for use in low-voltage switchboards for performing measuring tasks.
Take the maximum possible ambient temperature into account when selecting the
connecting cables.
The cables must be suitable for operation in a temperature that is 20 K higher than the
maximum ambient temperature.
Device can be irreparably damaged
When performing an insulation test of the entire installation with AC or DC, the device
should be disconnected before starting the test.
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