Rockwell Automation Allen-Bradley 7712, User Manual, Page: 21 / 74

Rockwell Automation Publication 7712-UM001D-EN-P - October 2017 21
Start-up Procedure Chapter 3
When performing any actions during testing, the plug connected to the
contactor cart must be firmly connected. If the plug is not correctly connected,
the contactor cart will not operate reliably.
Test Power Supply
Verify that the contactor cart has been racked to its test/withdrawn position.
1. Open the low voltage door.
2. Plug the appropriate power supply into the test power receptacle.
3. Move the control switch to test position so that the control circuit is
powered by the test power supply.
4. After the tests, disengage the contactor and move the control switch to
the normal position. Disconnect the external power supply.
5. Complete the Power Lockout procedure.
Operating Position
Operating position is designed only for performing normal functions of this
equipment. Any operation on the contactor will affect the MV status on the
load side.
ATTENTION:
Use suitable personal protective equipment (PPE) per local
codes or regulations. Failure to do so may result in severe burns, injury or
death.
IMPORTANT It is not possible to use any test power supply after the contactor cart has
been racked out of the test position. A set of auxiliary switches on the
contactor cart prevent the MV parts from being back fed by any low voltage
power supply through the CPT.
ATTENTION:
Use suitable personal protective equipment (PPE) per local
codes or regulations. Failure to do so may result in severe burns, injury, or
death.
ATTENTION:
The following procedure applies medium voltage to the
contactor cart and the load terminals. To avoid shock hazards, the MV and LV
doors must be closed. Failure to do so may result in severe burns, injury, or
death. Rockwell Automation assumes no responsibility for injuries to
personnel who do not follow the safety procedures prior to servicing or
operating the equipment.