Rockwell Automation 2500 CENTERLINE Motor Control Centers Installation Manual User Manual
Page 70
70
Rockwell Automation Publication 2500-IN001C-EN-P - April 2014
Chapter 7
Commissioning
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.
Verify vents are free from obstructions.
16.
Check that fans used for forced air cooling have:
a. Shafts that rotate freely
b. Blades with no dust or debris build-up
17.
Check that all filters are in place and clean.
18.
Check all current transformers for proper polarity.
Verify transformer secondaries are NOT open, and are either connected to
their respective devices or shorted. Reference individual unit wiring
diagrams and schematics for proper installation.
19.
Verify all barriers and parts removed during the installation process
have been reinstalled
.
We recommend that a barrier checklist is developed including such items
as, unit location, and barrier location. This checklist should be saved for
future reference.
20.
Before closing the enclosure and/or individual units, remove all tools,
metal chips, scrap wire, and other debris from the MCC interior.
If there is an accumulation of dust or dirt, clean out the MCC by using a
brush, vacuum cleaner, or a clean, lint-free rag. DO NOT use compressed
air—it redistributes contaminates on other surfaces
.
21.
Verify all withdrawable units are in the Connected position.
Close and latch unit and wireway doors, ensuring that wires are not
pinched. Column closing plates must be in place.
TIP
We recommend that you set up an inhouse program for scheduled
cleaning or replacement.
ATTENTION: Current transformer secondaries should not be “open.” To
avoid possible injury and electrical shock to personnel, do not energize
a current transformer with its secondary open.
ATTENTION: When conducting an electrical insulation resistance test,
isolate equipment sensitive to high test voltages, such as meters, solid
state devices, motor winding heaters, capacitor units, and transformers.