Siemens SENTRON PAC4220 - 4.3 Connection Examples

4.3 Connection examples
The connection ex
amples below show connection in:
• Two, three or four-wire systems
• With balanced or unbalanced load
• With and without voltage transformer
The device can be operated up to the maximum permissible voltage values with or without
voltage measuring transformers.
Note
x/1A or x/5A curr
ent transformers are always required for current measurement.
All input or output terminals not required for measuring remain free.
NOTICE
Grounding of current transformers optional
The tr
ansformers must always be connected and therefore always grounded on the secondary
side 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.
Connection examples
(1) 3-phase measurement, 4 conduct
ors, unbalanced load, without voltage transformer,
with 3 current transformers
Connection type 3P4W
Connection
4.3Connection examples
PAC4220
48 Equipment Manual, L1V30827278B-01