GE AKR User Manual

Trip
Devices
EC
Trip
Devices
DC
Applications
is
mounted
in
each
breaker
pole
and
contains
functional
adjustments
,
overcurrent
detection
and
tripping
hard
-
ware
.
EC
trip
devices
are
availa
-
ble
as
type
EC
-
2
A
(
standard
for
frames
through
2000
A
)
,
EC
-
1
(
optional
for
frames
through
2000
A
)
and
EC
-
1
B
(
standard
for
4000
and
6000
A
frames
)
.
Trip
charac
-
teristics
are
described
in
the
table
below
.
Instantaneous
tripping
is
obtained
when
a
tension
spring
yields
to
the
force
exerted
on
the
magnetic
armature
at
short
circuit
Long
-
Time
Delay
accomplished
with
a
positive
-
displacement
oil
piston
.
Sealing
of
the
assem
-
bly
eliminates
variations
caused
by
atmospheric
con
-
tamination
,
and
silicone
oil
minimizes
variations
in
time
delay
due
to
changes
in
ambient
temperature
.
Short
-
Time
Delay
is
accomplished
with
a
rugged
mechanical
escapement
.
General
Type
EC
overcurrent
trip
devices
are
magnetically
operated
,
using
a
series
coil
(
or
single
conductor
and
an
associated
magnetic
struc
-
ture
)
to
provide
tripping
force
.
Three
basic
character
-
istics
:
long
-
time
delay
,
short
-
time
delay
and
instantane
-
ous
,
can
be
used
in
various
combinations
to
suit
the
application
.
current
levels
,
permitting
the
armature
to
move
indepen
-
dently
of
the
time
delay
pis
-
ton
.
AKR
breakers
with
EC
trips
are
for
use
on
DC
sys
-
tem
voltages
,
and
are
avail
-
able
in
ratings
of
40
-
6000
amperes
.
One
EC
trip
device
in
Type
EC
-
1
B
Type
EC
-
1
Type
EC
-
2
A
Trip
Device
for
4000
and
6000
amp
frame
breakers
.
Combines
long
-
time
and
short
-
time
elements
for
intentional
delay
up
to
the
short
-
time
rating
of
the
breaker
.
Instantaneous
may
be
added
.
Trip
Device
for
600
-
2000
amp
frame
breakers
.
Combines
long
-
time
and
short
-
time
elements
for
intentional
delay
up
to
the
short
-
time
rating
of
the
breaker
.
Instantaneous
may
be
added
.
Trip
Device
for
600
-
2000
amp
frame
breakers
.
Available
in
combinations
of
long
-
time
and
instantaneous
elements
,
or
instantaneous
alone
.
Table
22.1
Adjustment
Ranges
for
EC
Trip
Devices
Long
-
Time
Short
-
Time
Instantaneous
Pickup
Trip
Pickup
Delay
®
Delay
©
Pickup
©
Device
(
1
A
)
MAX
-
adj
15
-
38
sec
4
-
9
X
or
6
-
12
X
9
—
15
X
or
80
-
250
%
X
©
EC
-
2
A
80
-
160
%
X
(
±
10
%
)
(
1
B
)
INTER
-
adj
7.5
-
18
sec
or
(
1
C
)
MIN
-
adj
33
-
82
sec
(
2
A
)
MAX
-
23
sec
(
1
A
)
MAX
-
30
sec
High
Set
up
to
15
X
Non
-
Adjustable
2
-
5
X
or
or
3
-
7
X
or
4
-
1
OX
(
2
B
)
INTER
-
15
sec
EC
-
1
80
-
160
%
X
(
±
10
%
)
(
1
B
)
INTER
-
15
sec
or
(
1
C
)
MIN
-
5
sec
or
(
2
C
)
MIN
-
07
sec
(
2
AA
)
MAX
-
20
sec
4
-
9
X
2
-
5
X
(
1
BB
)
MAX
-
45
sec
or
(
1
CC
)
MIN
-
2
sec
or
3
-
7
X
or
4
-
1
OX
(
2
BB
)
INTER
-
13
sec
6
-
12
X
9
-
15
X
or
80
-
250
%
X
®
EC
-
1
B
80
-
160
%
X
(
±
15
%
)
or
(
2
CC
)
MIN
—
07
sec
©
X
=
Trip
device
ampere
rating
.
If
trip
devices
are
set
above
100
%
for
coordination
purposes
,
such
settings
do
not
increase
the
breaker
’
s
continuous
current
rating
.
®
At
lower
limit
of
band
at
6
times
pickup
setting
.
©
At
lower
limit
of
band
at
2
Vi
times
pickup
setting
.
©
Low
-
set
instantaneous
.
Not
available
in
combination
with
long
time
delay
.
22
\
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