Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019 193
Maintenance Chapter 10
Periodic Inspection
Industrial control equipment should be inspected periodically. Inspection
intervals should be based on environmental and operating conditions, and
adjusted as indicated by experience. An initial inspection, within 3 or 4 months
after installation, is suggested. Applicable parts of the following guidelines should
be used:
Contamination
If inspection reveals that dust, moisture or other contamination has reached the
control equipment, the source must be eliminated. This could indicate an
incorrect or ineffective enclosure, unsealed enclosure openings (conduit or other)
or incorrect operating procedures. Dirty, wet or contaminated parts must be
replaced unless they can be cleaned effectively by vacuuming or wiping.
Some parts of other devices are factory lubricated – if lubrication during use or
maintenance of these devices is needed, it will be specified in their individual
instructions. If in doubt, consult the nearest Rockwell Automation sales office for
information.
Vacuum Bottles
The contacts in a vacuum bottle cannot be seen or examined directly. They rely
on the high vacuum to operate properly and to interrupt current. Visually inspect
the wear of the main contacts with the contacts closed. When any part of the
wear indicator, located on the front side of the hex shaft, moves up into the
bearing, replace all three vacuum bottles (see Vacuum Contactor User Manual).
The vacuum level should be tested periodically by applying high voltage
alternating current across the open bottle using a vacuum tester or Hi-Pot
equipment (see Vacuum Contactor User Manual).
TIP For OEM-supplied components, refer to documentation provided by the OEM
for recommended periodic maintenance procedures.
ATTENTION: Allen-Bradley magnetic starters, contactors and relays are
designed to operate without lubrication – do not lubricate these devices since
oil or grease on the pole face (mating surfaces) of the operating magnet may
cause the device to stick in the “ON” mode. Erratic operation can result with
injury or death.
To Next Page
Loading...
Need help?
General
