GE AKR User Manual

Derating
Factors
Class
A
insulation
.
Continu
-
ous
current
ratings
of
AKR
breakers
must
be
derated
for
ambient
temperatures
above
40
°
C
.
(
If
MicroVersaTrip
pro
-
grammer
is
used
,
the
pro
-
grammer
ambient
is
limited
to
70
°
C
.
)
Temperature
Derating
Factors
The
continuous
current
rating
of
AKR
breakers
is
based
on
their
use
in
an
enclosure
in
a
40
°
C
ambient
and
on
a
maximum
breaker
temperature
of
105
°
C
for
Table
29.1
Continuous
Current
Derating
Factors
Ambient
Temperature
Derating
Factor
40
°
C
1.00
45
°
C
.
95
50
°
C
.
89
55
°
C
.
84
(
MicroVersaTrip
Maximum
)
60
°
C
.
77
65
°
C
.
71
70
°
C
.
63
the
lower
dielectric
strength
.
The
short
-
time
and
short
circuit
current
ratings
are
not
affected
by
altitude
.
How
-
ever
,
the
short
circuit
current
rating
shall
not
exceed
that
of
the
voltage
class
prior
to
derating
.
Rating
correction
factor
for
low
voltage
power
circuit
breakers
are
as
listed
in
ANSIC
37.13
.
1981
.
Altitude
Correction
Factors
When
applying
low
voltage
power
circuit
breakers
at
altitudes
greater
than
6600
ft
.
,
their
continuous
current
rating
must
be
modified
because
a
higher
tempera
-
ture
use
will
be
experienced
for
a
given
current
rating
.
The
voltage
ratings
must
also
be
modified
because
of
Table
29.2
Altitude
Correction
Factors
Rating
Correction
Factor
Altitude
Continuous
Current
Meters
Feet
Voltage
2000
6600
(
and
below
)
1.00
1.00
2600
8500
0.99
0.95
3900
13000
0.96
0.80
pliance
with
the
referenced
ANSI
standards
.
The
test
circuit
X
/
R
ratio
and
power
factor
required
by
ANSI
C
37.13
for
unfused
breakers
is
6.6
with
15
%
power
factor
;
for
fused
breakers
is
4.9
with
20
%
power
factor
.
Standards
and
Testing
Type
AKR
low
voltage
power
circuit
breakers
are
designed
to
meet
ANSI
standards
C
37.13
and
C
37.16
and
are
tested
to
ANSI
C
37.50
and
C
37.14
.
The
breakers
are
UL
listed
and
labeled
certifying
com
-
Table
29.3
Interrupting
Capacity
Multiplying
Factors
for
Power
Factor
Lower
than
Test
Values
Multiplying
Factor
for
Breaker
Short
Circuit
Rating
System
Short
Circuit
Power
Factor
°
/
o
System
X
/
R
Ratio
Unfused
LVPCB
Fused
LVPCB
20
4.9
1.00
1.00
15
6.6
1.00
0.938
12
8.27
0.966
0.902
10
9.95
0.938
0.875
8.5
11.72
0.920
0.847
7
0.902
0.826
14.25
5
20.0
0.875
0.794
Humidity
and
Fungus
Ferrous
parts
are
cadmium
or
zinc
plated
for
corrosion
protection
with
the
exception
able
and
consists
of
the
of
some
parts
that
are
made
application
of
a
fungus
from
alloy
steels
and
are
in
-
resistant
varnish
to
those
herently
corrosion
resistant
,
insulating
materials
that
are
Current
-
carrying
parts
are
not
inherently
fungus
proof
,
silver
or
tin
plated
for
corro
-
sion
protection
and
to
assure
electrical
connections
.
Tropical
treatment
is
avail
-
29
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