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INSTALLATION
AND
OPERATION
OF
TYPE AK POWER CIRCUIT
BREAKER
RECEIVING
,
HANDLING AND STORAGE
Tf
the
circuit breaker is not
to
be plac
e
in
service
at once
,
store
It
tn a
clean
,
dv
location
in
an upright
position
.
Support
l
Unpack the circuit breaker
as
soon
as
to
prevent
bending
of
the studs
or
damag
possible
after
it has been
received
.
Exer
-
to any of
the
breaker
parts
.
Do
not
cove
else
care
in the unpacking
to
avoid
damage
the
breaker
with
any
packing
or
otbe
Upon receipt
of
a circuit breaker
,
im
-
to
the
breaker parts
.
Be
sure
that
no
loos
*
material which
absorbs
moisture
,
that
ma
mediately
make an
examination for
any
parte
are
missing
or
left
in
the
packaging
cause
corrosion
of
breaker
parte
. .
damage
or
loss sustained
In
shipment
,
u
material
.
Blow
out
any dirt
or
loose
parti
-
covering of
kraft
or
other
non
-
absorbei
injury
,
loss
or
rough handling
li
evident
,
cles
of packaging
material
remaining
on
/
or
paper will prevent dust from
settling
on
th
file a
damage
claim
at once
with
the trans
-
In
the
breaker
.
breaker
.
Before installing
,
or
operating these
portatlon company
and
notify
the
nearest
circuit breakers
,
make a
careful
reading
General Electric Sales Office ,
of the sections of these instructions which
are
pertinent
to the
anticipated work
.
INSTALLATION
Typical Outline
Drawing
No
,
are bolted
solidly
to
the
enclosure
frac
and need
not
be removed
from the
ei
closure
.
LOCATION
Breaker
266 C
753
256
C
754
695 C
116
248 C
703
238 C
123
846
C 281
238 C
192
238
C 193
26 BC
220
8450284
289
C 227
845 C
290
AK
-
1
-
15
AK
-
1
-
25
AX
-
2
-
15 and
25
AK
-
1
-
50 Man
.
Oper
*
AK
-
l
-
60
Elec
.
Oper
.
AK
-
2
-
50 S
.
£
.
Man
.
Oper ,
AX
-
1
-
76
AX
-
1
-
100
AJK
-
2
-
75 Klee
.
Oper
.
AJC
-
2
-
75
S
.
E
.
Man
.
Oper
.
AX
-
2
-
100
Elec
.
Oper
.
AK
-
2
-
100
S
.
E
.
Man
.
Oper
.
The surface
cm
which the breaker
is
mounted must be
flat
throughout
in order
not to
impose any
Internal
distortion
on
the breaker unit . The
supporting
must
be
rigid enough
to avoid
stbUlty 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
.
INDIVIDUALLY ENCLOSED BREAKERS
In
choosing
a location
for
the
installa
-
tion
of
an AK Circuit
Breaker
,
there
are
two
factors
to
be
considered
.
The
first
of these is the
effect of the
location
on
the breaker itself
,
igrmance
and
longer life may be
expected
if
the
area
is clean
,
dry
.
duet
-
free
,
and
well
ventilated
,
than il the opposites
to
these
conditions exist
The second
con
-
sideration
is convenience for operation
and
maintenance
.
The breaker
should
be
easily
accessible
to
the
operator
,
and
there should be sufficient space
allowed
for
maintenance work
to
be done
if
this
becomes necessary
.
2
.
Remove cover
plates
of snclosu
:
and
prepare them
to
accommodate whatev
<
power
entrance
means
is used
.
Much better
per
-
3
.
Mount
enclosing
case
to
support
!
structure
.
4
.
Replace
cover
plates and
ma
power connections
to
stationary tormina
In
enclosure
.
5
,
If
the breaker
.
is
a type
AX
-
1
AK
-
25
or
AX
-
50 and
-
has been
reinov
from the enclosure
,
It may now
be
r
placed
.
Control power connections to
t
terminal board
should
be madeasrequirf
(
See
CONNECTIONS
)
.
structure
any pos
-
MOUNTtNG
AX Circuit Breakers
are
designed to
be mounted In any
one of
three ways
.
These
are dead
front mounting
,
individual
mounting with the enclosurebeingprovided
,
and drawout mounting
In which
the
breaker
is
designed
for
Insertion into
a
cubicle
to
drawout
equipment
ouch
as a substation
or eofitrol board
.
6
.
Before
energizing
the power
ci
cult
,
operate the
breaker several times
be
sure that
it Is functioning
proper
(
See
OPERATION )
.
Individually
enclosed
breakers
are
supplied
with several types of enclosures
,
most common
Is the
general
purpose
type
or
the weather resistant
type
.
The former is
used for
favorable
indoor locations and
These breakers
are
designed for
mount
-
the latter for outdoor locations
or
indoor
mg
in
a
switchboard
or
enclosing
case
of
'
locations that may be subject
to
unfavorable
the
customer
' s design and construction
.
conditions
.
All of
the enclosures
are
pro
-
Mounting
in
this instance consisted bolting
vtded with suitable
means
for mounting
on
the
breaker
frame
to a
supporting
structure
walls
or
supporting
framework
.
Removable
within
,
the
switchboard
or
enclosure
,
con
-
cover
plates
are spirited
with the
en
-
nectlng the power
buses or
•
cables
,
and
closures which may be
drilled
or machined
making
any necessary control connections
.
to
accommodate the
entrance
of
bus
ducts
,
Tue front
cover
of the breaker enclosure
condutts
or
cables
.
Steps
in the
procedure
may be a hinged door
or a
plate
bolted
to
for installing enclosed
the
panel
.
In
either
case
,
it
should have
a
section
cut
out ,
through
which
the front
escutcheon of the breaker may protrude
*
Outline drawing numbers giving
the dimen
-
sions
needed for preparing a suitable
enclosure
or cubicle
for the various
types
of AX breakers
are
given
below
.
These
axe
for standard 2
or S
pole
breakers
.
DRAWOUT BREAKERS AXD
EQUIPMEN
DEAD FRONT BREAKERS
Mounting
drawout
breakers
consists
placing
the
breaker in the
proj
simply
position
with
respect
to
its enclose
sliding
or
rolling
tl
by
means
of
a
racking
handle
and
me
?
anism
,
racking it through the last
part
of
movement
during
which the stationary
<
movable
halves of the disconnect
eng
&
Large drawout breakers
are
fastened
t
telescoping tray which extends out from
enclosure
to
receive the breaker
.
Snj
breakers
have
guides
on
their side
pla
which slide in channels
in
the
encloaur
Both
large
and small
breakers have
a
t
posttion
in which the
secondary discourse
are
engaged
,
but the
primary discount
are not
.
In
this position
,
the breaker a
be operated electrically
without energiz
the
load cable or
bus
.
to a
stop
position
,
a :
breakers follow
:
1
.
If
the
breaker
is
an
AX
-
15
,
AK
- 25
or an
AK
-
SO
,
remove
It from the enclosure
.
With AK
-
50 breakers
,
a
handle
and
cam
arrangement
is used for that
part of
the
breaker
movement
that involves the dis
-
engagement or
engagement
of the
primary
disconnect
.
AK
-
76 and AK
-
100 breakers
These instructions
do
not purport to cover all details
or
Variations
in equipment
nor
to provide for
ovary
possible
contingenvy
to
be
mot
in
connection with
installation
,
operation
or
maintenance
.
Should
farther information
be
desired
or dteuld porttcoter
prob
/
*
m
»
arise which are
not
covered sufficiently
for
the purchaser ' s purposes
,
the
matter
ihou
/ d
he
referred
to
the
General
Bee
trie Company
.
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