Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 298)

5-30 Functional Description
7000A-UM150F-EN-P – June 2013 7000 “A” Frame
PF7000 MOTOR
Input contactor Output contactor
Bypass contactor
Bypass bus
Input bus
PF7000
CONTROL
PF7000 MOTOR
Input contactor Output contactor
Bypass contactor
Bypass bus
Input bus
PF7000
CONTROL
Figure 5.11 – A typical synchronous transfer set up using PF7000
For single motor applications, the drive is capable of performing
synchronous transfer without the need for a Programmable Logic
Controller (PLC). The command to close the bypass contactor and
the status of the bypass contactor are realized using the digital IO on
machine side SCB while the command to close the drive output
contactor and the status of the drive output (DO) contactor are
realized using the digital IO on the line side SCB. In addition to a
DO contactor, an application may require an output (OP) contactor.
This is controlled via machine side SCB. The run time commands
Request to Bypass (Synch) and Transfer to drive (De-synch) are
wired to the standard XIO board. Synchronous transfer will not be
performed if the phase sequence of the bypass voltage is not positive.
A T T E N T I O N A T T E N T I O N If the phase rotation and phase angle of the
bypass voltage compared to the drive input
voltage are not correct, damage may occur to the
drive, motor, couplings and driven equipment if a
transfer to bypass is attempted.