GE AKR-75 Installation Instructions Manual page 10
Low voltage power circuit breakers
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Also See for AKR-75:
- Maintenance manual (102 pages) ,
- Installation instruction (5 pages) ,
- Manual (63 pages)
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I
5.4
.
1
BREAKER INSERTION
( CODE B )
5
.
Lower the breaker
over
the
tray
until it is about
one
-
half
inch above the two dowel pins
on
the
tray
. Push the breaker
back into the
compartment
until the
rear
bottom flange of the
breaker rests against the guides behind the dowel pins
.
6
.
Slowly lower and guide the breaker onto the
tray
so the
holes in the rear flange fit
over
the
two
dowel pins . When
correctly positioned on the dowel pins ,
the breaker
'
s rear
and
side bottom flanges will
rest
firmly
on
the tray .
7
.
Secure the breaker to the
tray by inserting
and tighten
-
ing two
-
%
inch hex head
screws
into the front holes of its side
flanges
.
8
.
Push the breaker into
the compartment until the spring
discharge stop engages , preventing further movement
.
This
is the DISCONNECTED position . At this point the racking
cams are
positioned to
engage the fixed racking pins in the
compartment
,
ready to begin the racking motion
.
It is
to be
noted that manually operated breaker models do
not employ
a spring discharge interlock
.
It is unnecessary
because their operating mechanism
never
statically posi
-
tions the springs in
a
fully
-
charged state
.
However
,
to provide
necessary means for mechanically securing the breaker in
the
DISCONNECTED
position
,
a position
stop is employed
.
It has a release lever marked
"
Push
to
Withdraw " and is
located in the same place as the spring discharge release
lever
on
electrically operated breakers
—
see Fig
.
4
.
1
.
Prior
to lifting
a breaker
to
its intended
compartment
location
,
observe the following precautions :
a . Check
the
compartment to
insure that it is free of
foreign objects
.
b
. Verify
that the breaker is the correct type
for that
compartment
.
c . Insure that the breaker is OPEN
.
d
.
Apply
a thin
,
fresh
coat
of D 50 HD 38 lubricant
to
the
breaker
'
s
primary disconnects
.
e . Insure that the racking cams on the breaker are
correctly positioned for initial engagement with the
pins in the compartment . To do this , insert the rack
-
ing handle and
rotate
it fully
counterclockwise
.
2
.
Using
a suitable lifting mechanism and spreader rig ,
position lifting hooks
at
the
cutout
notches in the
top
wrap
-
around frames of the breaker . Exercise care
to
avoid damage
to the
control wiring
.
3
.
Open the
compartment
door
.
Keeping the rollout tray
positioned inside the compartment , raise the breaker above
the elevation of the
tray
.
4
.
Pull the tray all the way out to its WITHDRAWN limit
.
i
FINGER
-
TYPE
PRIMARY
DISCONNECTS
"
PUSH TO
WITHDRAW
"
RELEASE LEVER
I
Fig
.
4 AKR
-
9 F - 75 manually operated
( substructure type )
10
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