Rockwell Automation Allen-Bradley 7712, User Manual

Page: 28 / 74

28 Rockwell Automation Publication 7712-UM001D-EN-P - October 2017
Chapter 4 Equipment Operation
Selecting Power Source
The selector switch on the Control Switch assembly can either be turned from
Normal-Off-Test.
Connecting Test Power
1. Disconnect and lock out all feeder power supplies to the starter.
2. Rack the contactor cart to the test/withdrawn position.
3. If the unit is equipped with power factor correction capacitors, stored
energy must be dissipated before entering the power cell or dissipate the
power using the following procedure.
a. Verify the contactor cart is in test/withdrawn position.
b. Open the LV door.
c. Plug the appropriate power supply (120 or 230V) into the auxiliary
power receptacle on the control panel.
d. Move the control switch to the Test position.
e. Electrically operate the contactor by pushing the Start button on the
unit or at a remote location.
f. Disengage the contactor and turn the control switch to the Normal
position. Disconnect the external power supply.
g. Complete the Power Lockout procedure.
4. Use a 120V power cord and plug into the 120V plug on the Control
Switch Assembly (see Figure 5 on page 20 ) to test the starter without
Medium Voltage being present in the starter.
Racking Contactor Cart
To change the condition of the contactor cart,
• the main cabinet door must be closed
• earthing switch must be open
• the contactor status must read OPEN.
Test To test the starter without medium voltage present.
Normal To operate the starter in normal position.
Off To prevent the starter from operation.
ATTENTION:
The contactor cart must be racked out using tools supplied by
Rockwell Automation only. Failure to do so can cause damage to equipment,
personal injury, or death.