Siemens SENTRON PAC4220 - Page 52

Connection type 3P4WB
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9
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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4-3 Connection type 3P4WB, without voltage transformer, with 1 current transformer
(4) 3-phase measurement, 4 conductors, balanced load, with voltage transformer, with
1 current tr
ansformer
Connection type 3P4WB
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1
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)
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)
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)
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)
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)

)
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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4-4 Connection type 3P4WB, with voltage transformer, 1 current transformer
Connection
4.3Connection examples
PAC4220
50 Equipment Manual, L1V30827278B-01