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Rockwell Automation Publication 2100-IN012D-EN-P - September 2010
Chapter 7
Final Checklist Before Energizing
Perform the Pre-energizing
Check Procedure
1.
Remove all blocks or temporary holding means used for shipping all
component devices in the MCC.
2.
Inspect the enclosure and units for damage.
If structural damage is present, contact MCC technical support a
t
1.440.646.5800 and follow the prompts to Allen-Bradley>Low Voltage
Motor Control Centers>Post Shipment Support. If no structural damage
is visible, the electrical spacings should be intact. Refer to the tables starting
on
page 82
for the required minimum electrical spacings.
3.
Check and verify that the MCC is properly installed, as described in
, and inspect and verify that it is level, supported, and anchored.
4.
For MCCs with the 100 ms arc-resistant rating, check that clearance
height is at least 12 in. (305 mm).
5.
Check the integrity of the bus splice connections.
Recommended torque values can be found on the information label on the
interior of the vertical wireway door or on the interior right-hand side plate
of frame mounted units. See Joining and Splicing Vertical Sections,
publication
, for splicing information.
ATTENTION:
To ensure the safety of personnel performing the pre-
energizing check, make sure the MCC remote power sources are
disconnected and locked in the OFF/O position.
Using a voltmeter, verify that the MCC remote power sources are
disconnected.
ATTENTION:
Power factor correction capacitors (PFCCs) should be
applied correctly. For application instructions refer to Power Factor
Correction Capacitors for Bulletin 2100 MCC Starter Units Application
Techniques, publication
. When PFCCs are connected to the
motor circuit and the start-up procedure requires the respective motors to
be jogged, inched, or bumped (rotation direction check), temporarily
disconnect PFCCs. For more information contact, Rockwell Automation LV
MCC Technical Support at 1.440.646.5800 and follow the prompts to
Allen-Bradley>Low Voltage Motor Control Centers>Post Shipment
Support.
ATTENTION:
Verify that motor acceleration times are within specific
application specifications.
Excessive starting currents and/or acceleration times may cause inverse time
circuit breakers, power fuses, overload relays, and other components to
overheat and/or shutdown equipment.
