I.B. 29C891B
Page 53
Effective 11/98
type or equivalent 3 volt lithium battery. Refer to Table
2.2
for acceptable battery replacements.
Notice:
Care should be exercised when replacing the
battery to insure that the correct polarities are
observed.
Series C K, L and N-Frame Replacement
- The battery
is located behind the access cover for the battery and
programming port compartment of OPTIM Trip Units
used with Series C K, L and N-Frame circuit breakers
(Figure
5-3
). To remove the access cover, pull down on
the release tab located in the center of the cover while
pulling out on the cover. Pull out on the battery tab to
remove the battery. When replacing the battery, be cer-
tain that the negative side is pointing to the left when fac-
ing the front of the trip unit. Replace the access cover.
Series C R-Frame, SPB and DSII/DSLII Replacement
-
The battery is located behind the hinged cover of the
rating plug (Figure
5-4
). Lower the cover and remove
the battery by pulling out on the battery tab. When
replacing the battery, be certain that the negative side is
pointing left when facing the front of the trip unit. Polarity
markings are also shown on the inside of the hinged
cover. Close the rating plug’s hinged cover.
Figure 5-1 Battery Test Pushbutton and LED Shown on
Face of OPTIM Trip Unit
Figure 5-2 Battery Test Pushbutton and LED Shown on
OPTIM Rating Plug
5-4.1 LOCAL INDICATOR BATTERY CHECK AND
REPLACEMENT
The battery is a 3 volt lithium battery. Following a trip
operation and with no supplementary control power
available, the battery should maintain the mode of trip
LED for approximately 60 hours continuously. The ready
status of the battery can be checked at any time by
depressing the battery check/test pushbutton and
observing the battery test LED. If the LED does not light
with the pushbutton depressed, the battery should be
replaced. The correct polarity should, however, first be
checked (Figure
5-1
and
5-2
). The battery test pushbut-
ton and LED are located on the face of OPTIM Trip Units
used with Series C K, L and N-Frame circuit breakers,
and in the rating plug of OPTIM Trip Units used with
Series C R-Frame, SPB Systems Pow-R, and DSII/DSLII
circuit breakers.
Notice:
The battery can be replaced at any time with
the circuit breaker in service without affecting
the operation of the circuit breaker and its pro-
tection function.
The battery can easily be replaced from the front of the
trip unit. The replacement battery should be the same
Summary of Contents for Digitrip OPTIM 1050
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