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GEt-86151 B
Before inst'alling or
operating these circuit
breakers,
care-
fully read these
instructions.
Upon receipt
of
a
circuit
breaker, immediately examine
for
any damage or loss sustained in shipment.
lf
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.
Unoack the
circuit breaker
as
soon as possible after it has
been
received.
Exercise
care
in unpacking to avoid
damage
to
the
breaker
parts.
Be
sure
that
no loose
parts
are missing
RECEIVING, HANDLING
AND
STORAGE
INSTALLATION
or left
in
the packaging material. Blow out any
dirt
or
loose
particles
of
packaging material remaining
on
or
in
the
breaker.
lf
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.
NOTE: Before installing
in a
Nuclear C/ass
7E
application, verify that
this
product
is intended for
such
use
by
checking
the
procurement
records.
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
performance and longer life can be expected if the area
is
clean,
dry,
dust-free
and
well ventilated. The second
is
con-
venience
for
operation
and
maintenance.
The
breaker
should be easily accessible
to
the
operator
and
there
should
be
sufficient space available for maintenance
work.
MOUNTING TYPES
AKR-75
and
-100 breakers
are
furnished in
both
drawout
and
stationary construction. The mounting type
is identified
by
the second middle
digit
in
the
breaker's
nameplate desig-
nation as
follows:
AKR-4(f)-75,
where
(t)
:
mounting type code letter per
Table 2
STATIONARY BREAKERS
These breakers are designed
for
mountlng
in a
switch-
board
or
enclosure
designed and
constructed
by
others.
Mounting
consists
of bolting
the
breaker frame to
a
support-
ing
structure within
the
switchboard
or
enclosure,
connecting
the power
buses
or
cables,
and
making
any
necessary
con-
trol
connections.
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
thb
breaker.
The
supporting
structure 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
draw-
ing must
be
maintained
to
provide adequate
electrical
clear-
ance.
Connecting
bus and
cables must
be
rigidly supported
to
prevent undue stress on
the
breaker terminals.
Outline
drawing
numbers giving
dimensions
for
designing
a
suitable enclosure
for
the
stationarv
AKR-75 and AKR-100
types are given
below.
TABLE
2
MOUNTING TYPE CODES
AKR-75/100
(25"
wide)
AKR-100
(33"
wide)
TABLE
3
Stationary
Breaker
Type
Breaker
widrh
Outline Drawing
Manually
Operated
Electrically
Operated
AKR-(
)S-75
25"
1
39C456C
AKR-(
)S-100
25"
139L;4561
AKR-(
)W-100
33"
1
39C456i
139C4563
4
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