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Rockwell Automation Publication 2100-IN012D-EN-P - September 2010
Chapter 9
Maintenance
1.
Determine your unit type.
Plug-in Units
If a disconnect switch requires lubrication and is housed in a plug-in unit,
remove the plug-in unit from the MCC (For removal of unit, refer to
,
Installing and Removing Plug-in Units
, before lubricating the switch).
Frame Mounted Units
If a disconnect switch requires lubrication and is housed in a frame
mounted unit, turn off the power sources to the MCC so the switch can be
lubricated.
Save all parts for reinstallation.
2.
Remove the line guard from the disconnect.
3.
For access to the disconnect's stationary contacts, remove the arc hood.
4.
Generously apply the NO-OX-ID compound (sufficient enough to cover
with a noticeable film) to both sides of the movable contact blades and to
the adjacent insides stationary contacts and the hinge.
5.
Reinstall the arc hood that was removed in
step 3
.
6.
Reinstall the line guard cover that was removed in
step 2
.
7.
If the lubricated disconnect switch is housed in a plug-in unit, reinstall the
unit.
For installation of unit, refer to Installing Units with Vertical Operating
Handles, publication
If the unit requires lubrication because of corrosion (for example, a sulfuric
environment), replacing the unit disconnect may be required to avoid overheating
conditions. Lubrication may temporarily resolve overheating, however replacing
the disconnect switch would be the ideal, long-term solution.
ATTENTION:
To prevent injury or death to personnel lubricating
disconnect switch contacts, make sure that the MCC remote
power sources are disconnected and the respective disconnects
are locked in the OFF/O position.
