
Rockwell Automation Publication 2100-IN012G-EN-P - August 2016
83
Final Checklist Before Energizing
Chapter 7
Allen-Bradley AC drives and soft starter units are shipped with preset
factory settings such as ramp speed, current limits, switch positions, and
readouts. Preset factory settings are not be suitable for many
applications. Refer to instruction manuals, supplied with the MCC for
specific startup guidance.
13. Manually exercise all switches, control auxiliary switches, circuit
breakers, their respective operators, unit interlocks, trip mechanisms
(test by pushing the ‘Push to Trip’ button), and any other operating
mechanisms to verify proper operation.
14. Check timing relay settings as required.
15. Check the vents and fans.
a. Check all vents to ensure they are free from obstructions.
b. Check all fans, used for forced air cooling to ensure the shaft rotates
without obstructions.
c. Check that filters are in place and clean, and set up an in-house
program for scheduled cleaning or replacement.
If you have an MCC with arc-resistant design features, if a unit has
been provided with arc resistant baffles over door vents and fans,
these baffles must be fastened securely in place to maintain the arc
resistant capabilities of the MCC. Do not install any type of filter in
place of, or in addition to, the arc resistant baffles.
16. Check all current transformers for proper polarity and ensure their
secondaries are not ‘open’, but are either connected to their respective
devices or ‘shorted.’
17. Recheck that all barriers and parts that have been removed during
installation have been reinstalled.
Refer to your barrier checklist, see step
7
.
18. Before closing the enclosure and/or individual units, remove all tools,
metal chips, scrap wire and other debris from the MCC interior.
ATTENTION:
Verify that the parameters of configurable devices, such
as drives, soft starters, and overload relays, are suitable for the
specific application and change them as needed for the specific
application.
ATTENTION:
Current transformer secondaries are to be ‘closed’. To
avoid possible injury and electrical shock to personnel, do not
energize a current transformer with its secondary open.