Rockwell Automation Allen-Bradley 7712, User Manual

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Rockwell Automation Publication 7712-UM001D-EN-P - October 2017 71
Mechanical Interlock for 7712 and PowerFlex 7000 Drive Appendix D
To Run Bypass
• Open Drive Input contactor and Drive Output contactor
Note: Use electrical interlock to prevent Bypass and Drive Output
contactors being closed at the same time for manual bypass, not
synchronous. Optional - withdraw Drive Output cart with electrical
interlock to Bypass.
• Rack-in Bypass cart
• Start motor in Bypass
The Drive can now be tested in DC mode with Drive Input contactor
closed and Drive Output contactor open
To open Drive for Service
• Open Drive Input contactor, withdraw cart.
• Lock open, remove KA and KB keys and place them in transfer block
• Remove KC keys, use to open doors
To open Output Cabinet
• Open Bypass contactor and withdraw cart.
• Close earth switch
• Lock closed, remove KD key
• Put KD and KC keys in door to open
Interlock Operation Sequence (Two Motors)
In order to operate M1 and M2 motors we use the interlock sequence
described for one motor configuration.
The only difference is that the Output Cables Cabinets do not require a KC
Key. To open the Output Cables Cabinet the appropriate earthing switch
interlock key is required.