Rockwell Automation CENTERLINE Motor Control Center Servicing Flooded Equipment - Manual (Page 3)

Publication 2100-IN063A-EN-E—October 2005
CENTERLINE® Motor Control Centers Servicing Water Damaged Equipment 3
3. Wash down (hose down under moderate pressure) the motor control
center and the various parts with clean water. Do not use any cleaning
solvents.
4. Dry out the motor control center. It is recommended that heated dry air
be used. The temperature of the air should not exceed 85 o C
(approximately 190 o F).
Additional assistance is available from service companies that specialize
in airing and drying out water damaged equipment.
5. Reassemble the motor control center after it has been thoroughly dried
out. For additional assistance in reassembling the motor control center,
contact Rockwell Automation Global Manufacturing Solutions to
arrange for field service or others who specialize in water damaged
equipment restoration or replacement. Contact the Low Voltage Motor
Control Center Post Shipment Support for replacement parts.
6. Conduct an electrical bus insulation resistance test to make sure the
motor control center and field wiring are free from short circuits and
grounds. Conduct this test using an insulation resistance tester (megger)
with a potential of 500-1000 volts.
This test should be conducted phase-to-phase, phase-to-ground and
when applicable, phase-to-neutral. Typical insulation resistance values
are 50 megohms or greater. Next, check the field wiring; for example,
motor cables and/or incoming line cables.
NOTE: The insulation resistance values are affected by dampness
which may cause a considerably lower insulation resistance reading. If
this is the case and insulation resistance values are below one megohm,
it is recommended that the equipment be dried out a second time. Dry
out the motor cables by injecting a low voltage current. When the
equipment is dry, repeat the insulation resistance test. The minimum
accepted value for insulation resistance is one megohm.
7. Install the replacement plug-in units. (For installation of units, refer to
the Installing and Removing Plug-in Units section of CENTERLINE Motor
Control Center Instruction Manual, publication number
2100-IN012x-EN-P.)