
102
Rockwell Automation Publication 2100-IN012G-EN-P - August 2016
Chapter 9
Maintenance
Disconnect Switch and
Contact Lubrication
If a switch that is used frequently becomes difficult to operate or is in a highly
corrosive or caustic environment, it can require lubrication. The lubricant to be
used is NO-OX-ID Compound (catalog number 2100H-N18 for a 1 pt can or
catalog number 2100H-N18T for a 1 oz tube). To obtain the lubricant, contact
your local Allen-Bradley distributor or Rockwell Automation sales
representative.
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.
ATTENTION:
Follow NFPA 70E safety guidelines when working on energized
equipment.
To prevent injury or death to personnel lubricating disconnect switch contacts,
make sure any MCC power sources are disconnected and the respective
disconnects are locked in the OFF/O position. For plug-in units, remove the unit
from the MCC.
To prevent personal injury or damage to equipment, make sure that the unit
handle operator is in the OFF/O position before removing the unit.
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.