Siemens SENTRON PAC4220 - Page 55

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1)
The fuses are only used for cable protection.
All commerciall
y available miniature circuit breakers up to 20A(C) can be used.
2)
Connection of supply voltage
3)
Install a short-circuit device. Protection against overvoltage when the secondary transformer
cir
cuit is open.
4)
Cir
cuit breaker
Figure4-8 Connection type 3P3W, with voltage transformer, with 2 current transformers
(9) 3-phase measurement, 3 conductors, balanced load, without voltage transformer,
with 1 curr
ent transformer
Connection type 3P3WB
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1

)
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,/
,/,/,/,/,/
/19

9

9

9
1
NONONO
1)
The fuses are only used for cable protection.
All commerciall
y available miniature circuit breakers up to 20A(C) can be used.
2)
Connection of supply voltage
3)
Install a short-circuit device. Protection against overvoltage when the secondary transformer
cir
cuit is open.
4)
Cir
cuit breaker
Figure4-9 Connection type 3P3WB, without voltage transformer, with 1 current transformer
(10) 3-phase measurement, 3 conductors, balanced load, with voltage transformer,
with 1 curr
ent transformer
Connection type 3P3WB
Connection
4.3Connection examples
PAC4220
Equipment Manual, L1V30827278B-01 53