Plus™ and
PM™
Units
1.
Introduction
memory, so sub sequent loss of power does not result
in loss or change of any settings.
CJCJ
FUNCTION
SELECT
D
BATIERY
DCJ
VALUE
ENTER
Figure
6.
Function key placement on face of Trip Unit.
The functions of the five keys are
•
FU N CTION
- selects the mode of display.
•
S ELECT
-chooses the next item for display.
•
VA L U E
-
selects the phase-to-phase display or
allows changing of set points.
•
E NTER-
stores set points.
•
B A TT E R Y
-
powers the Trip Unit from the
internal battery.
Chapter 2 describes the operation of these keys in
detail.
Battery Function
Pressing the
BATIERY
key on the face of the Trip Unit
powers the unit from its internal battery. Bat tery
power is maintained for 30 seconds after the last key
is pressed. This self-powered mode allows setting up
the Trip Unit or viewing trip targets when the
breaker is de-energized and external control power
is unavailable . All normal setup, meter, and status
functions can be performed with battery power.
The battery is intended to power the Trip Unit when
it is otherwise unpowered. At low line currents the
Trip Unit display is not active. Pressing the
BAT IE RY
key under these conditions will not power the Trip
Unit
Note that at temperatures above
40°
C, the
BATIERY
key may have to be held down for up to
5
seconds for
the Trip Unit to be powered.
Batteries
The Trip Unit uses a lithium sulfuryl chloride battery
with a typical life of two years in a normally
energized breaker. Typical usage could include one
8
half-hour of use for first-time cold setup,
1 0
Trip
Unit status checks per year on a de-energized
breaker, and one or two configuration changes per
year.
The battery is
not
required for proper operation or
protection of the breaker. It is not needed nor used
to store setpoints, configurations, or trip target
information. It provides a source of power to display
setpoints and trip information only if no other
source of power is available.
Battery Replacement
Replace the battery if it does not power up the Trip
Unit or if the low-battery symbol appears in the
display when the
BATT E RY
key is pressed. Lift the
right-side tab of the battery cover on the front of the
Trip Unit to expose the 3.9
V AA
lithium cell. A
suitable replacement is the Electrochem 3B24-XA,
which is available from industrial distributors. The
manufacturer's address is listed in Appendix
4.
WARNING:
Replace the battery with Electrochem
3B24-XA only. Use of a different battery may present
risk of fire, explosion, or dam age to equipment.
Observe proper battery polarity when installing in
the Trip Unit battery compartment.
ATTENTION:
Remplacer l a b atterie ave c
uniquement des Electrochem 3B24-XA. L'utilisation
d'autres batteries peut presenter un risque de feu,
d' explosion ou d'endommagement du materiel.
Respecter la polarite de la batterie en !'installant
dans son logement.
WARNING:
The battery may explode if mistreated.
Do not recharge, disassemble, or dispose of in fire.
Keep the battery away from children and dispose of
the used battery promptly.
ATTENTION:
La batterie peut exploser en cas de
mauvaise utilisation. Ne pas la recharger, l'ouvrir ou
la jeter dans un feu. Doit etre garder hors de portee
des enfants. Une fois usee, la batterie doit etre jete
rapidement.
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