Rockwell Automation 21G PowerFlex 750-Series AC Drives User Manual
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Rockwell Automation Publication 750-IN001N-EN-P - April 2014
PowerFlex 750-Series AC Drives
120/240V AC Power Supply Connections - Common DC Input Drives
The drive-supplied 120/240V AC is wired through a circuit breaker mounted in
the Common DC Input drive cabinet. The circuit breaker is connected to TB2-3
and TB2-4 on the Common DC Input drive control panel.
Figure 114 - 120V Connection Terminals - Floor Mount Frames 8…10
This 13 A circuit breaker provides branch-circuit short-circuit and overcurrent
protection for the wiring on the primary side of the control transformer, and
protection of the transformer primary. Transformer secondary protection (240V
output) is provided through a 5 A, 600V, Class CC, time delay fuse.
ATTENTION: To avoid an electric shock hazard when servicing the drive, a means for
Lockout/Tagout of an external 120/240V power source must be provided. Or the circuit
breaker SW5 must be locked and tagged. Locking and tagging the common bus
precharge disconnect switch SW2 alone does not provide sufficient protection when
servicing the drive.
IMPORTANT
The transformer primary wiring is internally wired through the DC input drive
disconnect switch SW2 ahead of the control transformer primary terminal connections.