GE AKR-50 Installation Manual

GEI
-
86150
-
A
RECEIVING
,
HANDLING
AMD
STORAGE
Before
installing
or
operating
these circuit
breakers
,
carefully
read
these
instructions
.
the
breaker
parts
.
Be
sure
that
no
loose
parts
are
missing
or
left
in
the
packaging
material
.
Blow
out
any
dirt
or
loose
particles
of
packaging
material
remaining
on or
in
the
breaker
.
If
the circuit
breaker
is
not to
be
placed
in
service
at
once
,
store
it
in
a
clean
,
dry
location
in
an
upright
position
.
Support
it
to
prevent
bending
of
the studs
or
damage
to
any
of
the breaker
parts
.
Do
not
cover
the breaker
with
packing
or
other material
which absorbs
moisture
that
may
cause
corrosion
of
breaker
parts
.
A
covering
of
kraft
or
other
non
-
absorbent
paper
will
prevent
dust
from
settling
on
the breaker
.
Upon
receipt
of
a
circuit breaker
,
immediately
examine
for
any
damage
or
loss sustained
in
shipment
.
If
injury
,
loss
or
rough handling
is evident
,
file
a
damage
claim
at
once
with
the
transportation
company
and
notify
the
nearest
General
Electric
Sales
Office
.
Unpack
the circuit breaker
as
soon as
possible
after
it
has
been
received
.
Exercise
care
in
unpacking
to
avoid
damage
to
INSTALLATION
MOTE
:
Before
installing
in
a
Nuclear
Class
1
E
application
,
determine that this
product
is intended
for
such
use
by
checking
the
procurement
records
.
DRAWOUT
BREAKERS
GENERAL
Drawout
breakers
are
manufactured
in
three
different
styles
identified
by
mounting
code letters
A
,
B
and
D
.
Code
A
break
-
ers are
employed
in AKD
-
6
switchgear
and
feature
closed
-
door drawout
operation
.
Code
B
breakers
provide
an
alternate
closed
-
door drawout
arrangement
with
the
stationary
element
furnished
as a
preassembled
“
substructure
”
.
Code
D
break
-
ers are
employed
in AKD
-
8
or
substructure
type
gear
and
feature
closed door drawout
.
The construction and
operation
of
each
of
these drawout
styles
is covered under
respective
headings
in
the
following
text
.
As
a
general
rule
,
breakers
of
the
same
drawout
type
,
voltage rating
and
ampere
frame
size
are
physically
inter
-
changeable
.
However
,
to
be
electrically interchangeable
with
respect
to
secondary
and
control
circuits
,
they
must
have
duplicate
wiring
.
The
degree
of
interchangeability
and
the
mechanisms
for
controlling
it
are
discussed
separately
on
page
(
14
)
-
Mote
:
The
three drawout
types
are
mutually
nonin
-
terchangeable
;
before
insertion
is
attempted
,
verify
that
the
breaker
model
matches its
intended
com
-
partment
.
LOCATION
In
choosing
a
location
for
the installation
of
these breakers
there
are
two
factors
to
be considered
.
The
first
is
the
location
’
s
environmental
impact
on
the breaker
.
Much better
perfor
-
mance
and
longer
life
can
be
expected
if
the
area
is clean
,
dry
,
dust
-
free
and well ventilated
.
The
second is convenience
for
operation
and
maintenance
.
The breaker should be
easily
accessible
to
the
operator
and
there should
be
sufficient
space
available
for
maintenance
work
.
STATIONARY BREAKERS
These breakers
are
designed
for
mounting
in
a
switchboard
or
enclosure
designed
and
constructed
by
others
.
Mounting
consists
of
bolting
the breaker
frame
to
a
supporting
structure
within
the switchboard
or
enclosure
,
connecting
the
power
buses
or
cables
,
and
making
any
necessary
control
connec
-
tions
.
The
front
cover
of
the breaker enclosure
may
be
a
hinged
door
or a
plate
bolted
to
the
panel
,
including
a
cut
-
out
opening
through
which the
front
escutcheon
of
the breaker
can
protrude
.
The
surface
on
which
the breaker is
mounted
must
be
flat
to
avoid internal distortion
of
the breaker
.
The
supporting
struc
-
ture must
be
rigid enough
to
avoid
any
possibility
of
the breaker
studs
supporting
the
weight
of
the
breaker
.
Minimum
cutout
dimensions
as
given by
the
appropriate
outline
drawing
must
be
maintained
to
provide adequate
electrical clearance
.
Con
-
necting
bus and
cables
must
be
rigidly
supported
to
prevent
undue
stress
on
the breaker terminals
.
The outline
drawings
in
Table
2
provide
basic
dimensional
information for
designing
the
pan
©
]
or
enclosure
mounting
.
TABLE
2
CODE
A
(
AKD
-
6
SWITCHGEAR
) (
Fig
.
2
)
This
type
drawout breaker
is
supported
by
two
protruding
pins
on
each side
of
its
frame
;
these
engage
slots
in
telescoping
slide
rails
(
tracks
)
mounted
to
each sidewall
of
the breaker
compartment
.
The door
of
the
compartment
is
hung
on
a
telescoping
inner
housing
also attached
to
the
movable tracks
.
These elements
are
arranged
so
that
the
door
moves
in
unison
with
the breaker between
the
CONNECTED
and
DISCON
-
NECTED
positions
,
allowing
the
breaker
to
be
racked without
opening
the
door
.
This
feature
is
referred
to
as
“
closed
-
door
drawout
”
.
Outline
Stationary
Breaker
Type
The
in
and
out
movement
of
the
breaker between the
CONNECTED
-
TEST
-
DISCONNECTED
positions
is
per
-
formed
by
a
breaker
-
mounted
apparatus
called the
drawout
or
“
racking
”
mechanism
.
It
comprises
a
transversely
-
mounted
,
jackscrew
-
driven
crankshaft
with
a
slotted
crank
arm
at
each
end
.
As the
crankshaft
is rotated
,
each
crank
arm
fulcrums
about
a
fixed
pin
in
the
compartment
to
move
the breaker
in
or
6
V
3
anuaSSy
Operated
Electrically
Operated
AKR
-
( )
S
-
30
/
30
H
139
C
4300
139
C
4301
AKR
-
( )
S
-
50
/
50
H
AKRT
-
(
)
S
-
50
/
50
H
139
C
4761
139
C
4762
out
.
4
Courtesy of NationalSwitchgear.com

GE AKR-50 Specifications

General

Brand	GE
Model	AKR-50
Category	Circuit breakers
Language	English