Three-phase wiring diagrams
Chapter 5. THREE-PHASE WIRING DIAGRAMS
Warning
•
All
the modules must be connected to the earth by a suitable terminal
• The internal high speed fuses only protect the thyristors
• According to the unit operating conditions, the supply parameters and
applicable standards, the User must install an external cut-off and
installation protection device.
5.1 4 5 1 SERIES SOLID STATE CONTACTORS
Ph 1 P h 2 P h 3 N
Installation protection
and cut-off
device
Logic control signal
451
series
5
451
series
451
series
Terminal 8 for PLF Option
PLF detection circuit power
suPpq
Three-phase load
Star with neutral
(4 wires)
Figure 5.1 Example of 451 series unit three-phase wiring diagram (non-fan-cooled).
Load in star with neutral.
5-2
451-461 User Manual
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