GE Industrial Solutions EntelliGuard TU Trip Units - Manual (Page 69)

DEH-4567B EntelliGuard TU Trip Units: UL/ANSI Models
Maintenance and Troubleshooting
©2012 General Electric All Rights Reserved 59
SECTION 11. MAINTENANCE AND
TROUBLESHOOTING
DANGER
ELECTROCUTION
Ensure the circuit breaker has been tripped, indicating
OFF, and the main springs are fully discharged when
performing circuit breaker maintenance.
Failure to comply with these instructions could result
in death or serious injury.
WARNING
IMPROPER INSTALLATION, OPERATION AND
MAINTENANCE
Ensure only qualified personnel install, operate, service
and maintain all electrical equipment.
Failure to comply with these instructions could result
in death or serious injury.
WARNING
PERSONAL INJURY
• Avoid risk of injury from moving parts while handling
the circuit breaker
• If advisable, use a cable/busbar lockable grounding
device (optional accessory) to provide additional safety
during system maintenance
Failure to comply with these instructions could result
in death or serious injury.
RATING PLUG REMOVAL AND REPLACEMENT
NOTICE
Removal of the rating plug while the breaker is carrying
current reduces the breaker's current-carrying capacity to
approximately 40% of the current sensor rating.
Interchangeable rating plugs are removed with a Rating
Plug Extractor, Catalog No. TRTOOL. (Suitable equivalents
are commercially available as "integrated circuit [DIP]
extractors.") Grasp the rating plug tabs with the extractor
and pull the plug out as shown in the figure below.
Be sure to grab the tabs and not the front cover of the
rating plug, or the plug may be damaged.
Figure 11-1: Trip Unit with Rating Plug Removed
BATTERY REPLACEMENT
WARNING
IMPROPER REPLACEMENT
• Replace the battery with 3.6 V ½ AA lithium battery
only
• Wear hardhat, gloves, and safety shoes when
replacing the battery
Failure to comply with these instructions could result
in death or serious injury.
WARNING
IMPROPER DISPOSAL
• Ensure battery is properly disposed of according to all
applicable regulations
Failure to comply with these instructions could result
in death or serious injury.
Replace the battery if it does not power up the trip unit
when any key is pressed.
Lift the battery cover on the front of the trip unit to expose
the 3.6 V ½ AA lithium cell. A suitable replacement is a
Duracell CR2.