GE AKR User Manual

Trip
Devices
MicroVersaTrip
®
RMS
-
9
Tripping
Functions
Long
-
Time
Function
Moving
from
left
to
right
on
the
current
axis
,
Figure
16.1
,
the
upper
part
of
the
time
current
curve
is
the
long
-
time
pickup
.
This
is
the
func
-
tion
used
to
protect
a
circuit
against
low
magnitude
over
-
currents
.
The
breaker
trips
because
the
current
has
exceeded
the
long
-
time
setting
.
If
a
breaker
is
pro
-
tecting
a
motor
,
the
start
-
up
surge
(
in
-
rush
current
)
can
be
accommodated
by
setting
the
breaker
to
allow
for
a
momentary
delay
while
the
motor
has
a
chance
to
reach
its
normal
operating
speed
or
full
load
current
.
CURRENT
SETTING
7
X
8
X
LONGTIME
PICKUP
.
S
t
7
.
1.1
1
DELAY
MO
MO
MO
to
*
>
g
Tim
#
Delay
Bands
t
>
>
/
MO
7
400
7
MO
Maximum
Total
Clearing
Tim
#
WO
l
2
T
OUT
Minimum
Toial
Clearing
Tim
#
IDO
?
A
10
TO
10
5
C
90
Short
-
Time
Function
The
middle
portion
of
the
curve
is
the
short
-
time
func
-
tion
.
It
is
used
to
protect
against
higher
magnitude
overcurrents
and
low
-
level
short
circuit
faults
.
Overcur
-
rent
due
to
short
circuits
is
generally
in
the
order
of
10
or
more
times
full
-
load
cur
-
rent
,
and
is
measured
as
symmetrical
RMS
(
root
mean
square
)
short
-
circuit
current
.
40
M
v
w
20
VM
SHORT
TIME
/
0
UT
SHORT
TIME
VI
l
PICKUP
<
2
i
DELAY
10
M
9
Short
Tm
*
WlJfJfL
li
'
oK
VK
in
g
§
‘
•
4
.
'
.
^
Pt
IN
56
UJ
VI
3
2
i
'
*
•
i
I
I
I
Instantaneous
Function
At
the
bottom
of
the
time
current
cun
/
e
is
the
protect
-
ive
device
’
s
instantaneous
function
.
The
instantaneous
trip
point
determines
the
level
at
which
the
breaker
will
trip
without
an
intentional
time
delay
.
This
immediate
interruption
occurs
only
as
a
result
of
a
severe
overcur
-
rent
condition
,
such
as
a
high
-
level
short
circuit
,
that
would
damage
the
electrical
system
if
not
interrupted
.
An
instantaneous
trip
can
be
adjustable
,
depending
upon
the
application
.
i
.
9
'
BL
8
>
z
.
01
0
*
0
T
04
M
A
[
HMirai
.
04
Deifm
.
ir
'
End
ol
Cur
*
4
03
03
ZZ
/
Z
/
/
y
/
.
5
.
»
?
MULTIPLES
OF
INSTANTANEOUS
PICKUP
MUlTlPl
ES
OF
CURRENT
SETTING
(
C
)
Fig
.
16.1
Time
Current
Curve
Definition
—
Overload
and
Short
Circuit
i
f
16
Courtesy of store.ips.us

GE AKR Specifications

General

Standards	UL489, IEC 60947-2
Voltage Rating	600V
Mounting	Fixed, Drawout
Poles	3
Trip Unit	Electronic
Operating Temperature	+70°C