GE Industrial Solutions WavePro Low-Voltage Power Circuit Breakers - Manual (Page 14)

MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 1. Introduction
6
Batteries
The Trip Unit uses a lithium manganese dioxide battery
with a typical life of two years in a normally energized
breaker. Typical usage could include one half-hour of use
for first-time cold setup, 10 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 protec-
tion of the breaker. It is not needed nor used to store set-
points, 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
BATTERY key is pressed. Lift the right-side tab of the
battery cover on the front of the Trip Unit to expose the
3.0 V lithium magnesium dioxide cell. A suitable replace-
ment is the Duracell DL123A, which is available from
industrial distributors.
WARNING: Replace the battery with Duracell DL123A
only. Use of a different battery may present risk of fire,
explosion, or damage to equipment. Observe proper bat-
tery polarity when installing in the Trip Unit battery
compartment.
ATTENTION: Remplacer la batterie avec uniquement des
Duracell DL123A. L’utilisation d’autres batteries peut
présenter un risque de feu, d’explosion ou
d’endommagement du matériel. Respecter la polarité de
la batterie en l’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 bat-
tery promptly.
ATTENTION: La batterie peut exploser en cas de
mauvaise utilisation. Ne pas la recharger, l’ouvrir ou la
jeter dans un feu. Doit être garder hors de portée des
enfants. Une fois usée, la batterie doit être jeté
rapidement.
Liquid Crystal Display
Figure 4 illustrates the LCD with all segments illuminated.
The various segments are energized in response to condi-
tions sensed by the Trip Unit.
1-7 MicroVersaTrip Plus and
MicroVersaTrip PM Accuracies
The accuracy data in Table 6 represent the average
expected performance of MicroVersaTrip Plus and
MicroVersaTrip PM Trip Units. These data are valid for
setup, metering, and status mode displays. They include
the effects of Trip Unit ambient-temperature variation
from 0
° C to 70 ° C.
All percentages are based on full-scale values. Full-scale
current is xIn, the rating of the breaker’s rating plug. Full-
scale voltage is the potential transformer primary voltage
rating. These data do not include the accuracy rating of
any measuring instrument.
For characteristics and accuracies of overcurrent protec-
tion, refer to DES–001 for long- time delay, short-time
delay, and instantaneous time-current curves and DES–
002 for ground-fault time-current curves.
Value
Full-Scale
Accuracy Resolution
Current (A, kA) ± 2% ± 0.5 digit
Voltage (V) ± 1.5% ± 0.5 digit
Energy (kWh, MWh, GWh) ± 3.5% ± 0.5 digit
Real power (kW, MW) ± 3.5% ± 0.5 digit
Total power (kVA, MVA) ± 3.5% ± 0.5 digit
Frequency (Hz) ± 1 Hz ± 1 Hz
Time delay (sec) ± 1 sec ± 1 sec
Table 6. Protective relay and metering accuracies and resolutions.