Connection Examples - Siemens SENTRON PAC4200 Manual

Connection

4.3 Connection examples

Protection of the supply voltage and voltage measuring inputs
Protection of the supply voltage and voltage measuring inputs
The fuses in the supply voltage and 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.
4.3 Connection examples
The connection examples below show connection in:
● 2, 3 or 4-wire systems
● With balanced or unbalanced load
● With/without voltage transformer
● With current transformer
The device can be operated up to the maximum permissible voltage values with or without
voltage measuring transformers.
It is only possible to measure the current with current transformers.
All input or output terminals not required for measuring remain free.
In the connection examples, the secondary side of the transformer is grounded at the "l"
terminal as an example. It can be grounded at either the "k" or the "l" terminal.
The wiring method must be made known to the device in the device settings. The connection
types given below refer to the device parameterization.
NOTICE
Grounding of current transformers optional
The connection of the transformers and thus also the grounding of the transformers on the
secondary side must always be carried out according to 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.
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CAUTION
System Manual, 05/2019, A5E02316180B-05
PAC4200