Publication 2100-IN012C-EN-P - April 2009 97
Maintenance Chapter 9
2. If there are no signs of overheating, but thermal infrared tests
indicate service is required, check the power connections for
proper torque.
a. On disconnect switches, service the knife blades with a
Scotch-Brite cleansing pad.
b. Remove all hardened grease.
Care should be taken not to distort the disconnect jaw
(stationary contact).
c. Lubricate with a fine film of NO-OX-ID (catalog number
2100H-N18 for a 0.47 L (1 pt) can, or catalog number
2100H-N18T for a 29.5 ml (1 oz) tube).
Should the disconnect be subject to environmental conditions
causing chronic tarnishing, it may be necessary to determine
if there is an incompatibility in the plating material, for
example, hydrogen sulfide and silver plating.
On fuses and fuse clips, service by polishing with a Scotch-Brite
cleansing pad. Do not lubricate the fuses or the fuse clips.
3. If overheating has occurred as indicated by severe tarnishing,
infrared test results, crystallization of insulation on conductors,
discoloration of the components, darkening of the molding
materials, brittle conductor insulation, or deformation and
melting of parts, replace the components that are suspect.
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
If servicing a plug-in unit, remove it from the MCC to
facilitate servicing. Refer to Chapter 2
of this publication
for unit removal guidelines.
When plugging units back in, refer to
CENTERLINE 2100
Motor Control Centers (MCC) Units with Vertical Operating
Handles Installation Instructions,
publication 2100-IN014,
and
CENTERLINE 2100 Motor Control Center (MCC) Units
with Horizontal Operating Handles Installation Instructions,
publication 2100-IN060.
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