I.B. 29C891B
Page 54
Effective 11/98
Figure 5-3 Battery Shown Installed in Battery/Program-
ming Port Compartment
Figure 5-4 Battery Shown Installed Behind Rating Plug
Hinged Cover
5-4.2 RATING PLUG REPLACEMENT
Notice:
Mechanical rejection means will prevent the
installation of a rating plug in a trip unit for
which it was not intended.
The fixed type interchangeable rating plugs used in
OPTIM Trip Units can be simply removed and replaced
using a small common flathead screwdriver. Refer to
Figures
5-5
and
5-6
and proceed with the following steps:
Step 1:
Make sure that the circuit breaker in which the
trip unit is installed is open.
Step 2:
Figure
5-5
shows the rating plug location in
OPTIM Trip Units used with Series C L and N-
Frame circuit breakers. If Figure
5-5
is applica-
ble, proceed with Step 3. If not, proceed to
Step 5.
Step 3:
Remove the rating plug by turning the small
positioning screw in a counterclockwise direc-
tion until it is loose. Use two fingers to remove
the rating plug by pulling out on the small mold-
ed top and bottom lips.
Step 4:
Install a new rating plug by pushing it gently
into the rating plug cavity until it is seated.
Secure the rating plug in position by turning the
positioning screw in the clockwise direction
until it is snug. Do not over tighten the screw.
Step 5:
Figure
5-6
shows the rating plug location in
OPTIM Trip Units used with Series C R-Frame,
SPB Pow-R and all DSII/DSLII circuit breakers.
If Figure
5-6
is applicable, proceed with Step 6.
Step 6:
Lower the rating plug’s hinged cover to access
the positioning screw. Remove the rating plug
by turning the screw in a counterclockwise
direction until it is loose. Use two fingers to re-
move the rating plug by pulling out on the plug.
Step 7:
Install a new rating plug by pushing it gently
into the rating plug cavity until it is seated.
Secure the rating plug in position by turning the
positioning screw in the clockwise direction
until snug. Do not over tighten the screw. Close
the hinged cover.
Notice:
• For the Series C R-Frame trip unit, the
rating plug screw is engaged/disen-
gaged with only a 1/4 turn.
• For the SPB and DSII/DSLII trip unit,
the rating plug screw is engaged/disen-
gaged with several turns.
Summary of Contents for Digitrip OPTIM 1050
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