MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 1. Introduction
9
Liquid Crystal Display
Figure 7 illustrates the LCD with all segments illumi-
nated. The various segments are energized in
response to conditions sensed by the Trip Unit.
1-8 MicroVersaTrip Plus and
MicroVersaTrip PM Accuracies
The accuracy data in Table 7 represent the average
expected performance of MicroVersaTrip Plus and
MicroVersaTrip PM Trip Units. These data are valid
for setup, metering, and status mode displays. These
data 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.
Refer to the trip-time curves listed in Table 8 for
characteristics and accuracies of overcurrent protec-
tion.
VV
VV
aa
aa
ll
ll
uu
uu
ee
ee
FF
FF
uu
uu
ll
ll
ll
ll
--
--
SS
SS
cc
cc
aa
aa
ll
ll
ee
ee
AA
AA
cc
cc
cc
cc
uu
uu
rr
rr
aa
aa
cc
cc
yy
yy
RR
RR
ee
ee
ss
ss
oo
oo
ll
ll
uu
uu
tt
tt
ii
ii
oo
oo
nn
nn
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 7. Protective relay and metering accuracies and
resolutions.
BB
BB
rr
rr
ee
ee
aa
aa
kk
kk
ee
ee
rr
rr
TT
TT
yy
yy
pp
pp
ee
ee
TT
TT
rr
rr
ii
ii
pp
pp
--
--
TT
TT
ii
ii
mm
mm
ee
ee
CC
CC
uu
uu
rr
rr
vv
vv
ee
ee
ss
ss
GG
GG
rr
rr
oo
oo
uu
uu
nn
nn
dd
dd
--
--
FF
FF
aa
aa
uu
uu
ll
ll
tt
tt
CC
CC
uu
uu
rr
rr
vv
vv
ee
ee
ss
ss
AKR GES-9910 GES-9911
Power Break® and
R-Frame
GES-9909 GES-9911
Power Break® II GES-9989 GES-9990
Table 8. Trip-time curves for breaker types covered in this
guide.
Figure 7. Liquid crystal display segments.
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