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Time Current Tripping
Characteristics
AKR low voltage power cir
-
cuit breaker time current
curves are the engineering
documents which define
technical performance char
-
acteristics of the devices
.
Information provided
on the time
current curve
includes the following :
•
Product family
type (
s )
.
•
Specific device
type (
s
)
.
•
Ampere ratings covered
on curve
.
•
Overcurrent characteris
-
tics
—
long time
,
short
-
time
,
instantaneous
,
etc
.
•
Maximum total clearing
time
.
•
Maximum and minimum
temperature
limits
.
•
Frequency ratings
.
•
Voltage ratings
.
•
Specific trip unit ratings
.
•
Trip unit adjustment
ranges
.
•
Tolerances
.
Multiples of circuit breaker
trip rating are shown on the
top and bottom horizontal
axis
,
with time in seconds
on the vertical axis . Approx
-
imate minimum and maxi
-
mum clearing time is readily
determined from the charac
-
teristics curves
.
Tripping characteristics
meet
ANSI
,
NEMA and UL
standards for rating and
calibration
.
Table 39.1
AKR Low Voltage Power Circuit Breakers Time Current Curves
Trip Device
Trip Elements
Curve
LSI
GES
-
6227
MicroVersaTrip
®
RMS
-
9
G
GES
-
6228
LSI
GES
-
6199
MicroVersaTrip
®
G
GES
-
6195
EC - 1
LSI
GES
-
6000 A
LI
-
1 BB
-
3
GES
-
6003
EC -
1 B
LI - 1 CC - 3
GES
-
6004
LSI
GES
-
6005
LI -
1 A
- 3
GES
-
6010
EC - 2
/
2 A
LI - 1 B
-
3
GES
-
6011
LI -
1
C - 3
GES
-
6012
39
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