GE Industrial Solutions Power Plus Control Units - Manuel (Page 12)

Power+™ Control Units
Chapter 4. Maintenance and Trouble-Shooting
4–1 Control Unit Removal and
Replacement
Rejection pins are installed on the rear of all Control
Units to prevent installation of an incorrect Control Unit
into a switch. Do not use excessive force when installing a
Control Unit.
Power Break II Insulated-Case Switches
Power Break II switches are shipped from the factory with
their Control Units installed. Removal is only necessary for
replacement.
To remove the Control Unit, perform the following pro-
cedure:
WARNING: Before beginning this procedure, turn the
switch OFF, disconnect it from all voltage sources, and
discharge the closing springs, if they are charged, by clos-
ing and then opening the switch.
AVERTISSEMENT: Avant de commencer cette
procédure, mettre l'interrupteur en position OFF, le
déconnecter de toute tension d’alimentation, et
décharger les ressorts de fermeture.
1. Loosen the four #8-32 screws on the switch trim-plate
assembly, if present, and remove the trim plate.
2. Loosen the four #10-32 screws at the corner of the
switch cover. Remove the cover from the switch face.
3. Pull the Control Unit locking lever to the right, then
hold the Control Unit near the rating plug and lift it
straight out of the switch.
To reinstall the Control Unit, perform the following pro-
cedure:
1. Pull the Control Unit locking lever to the right.
While holding the lever, carefully align the connec-
tor on the rear of the Control Unit with the connec-
tor in the switch. Press down on the Control Unit
while holding it near the rating plug. When the Con-
trol Unit is fully seated, slide the locking lever back to
the left.
2. Reinstall the switch top cover and tighten the four
#10-32 screws to 32 in-lbs.
3. Replace the trim plate, if present, and tighten the
four #8-32 screws to 20 in-lbs.
4–2 Rating Plug Removal and
Replacement
Rating plugs are removed with a rating plug removal tool,
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 illustrated in Figure 6. Be sure to
grab the tabs and not the front cover of the rating plug, or
the plug may be damaged.
Figure 6. Removing the interchangeable rating plug (a
Power+ Trip Unit is shown).
To install a rating plug, hold the plug between the thumb
and forefinger, then push it into the Control Unit. Proper
engagement is verified by a click. Rejection features are
provided on all rating plugs to prevent application mis-
matches. Never force a rating plug into place. A rating
plug must only be replaced with a unit with the identical
rating.
Do not attempt to use a rating plug from a different type
of Control Unit or Trip Unit in a Power+ Control Unit.
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