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Fie.
9
Closing Spring Discharge
Interlock
Rack
the
circuit
breaker
into
the
connected
position.
Push
the sliding
link to
the rear and attempt
to
close
the
breaker
using
the
control
switch.
Again, nothing
should happen.
Now
attempt
to
close the
breaker by
depressing the
manual
close
button. Again, the closing
springs
will
discharge
but
the
breaker should remain
open.
If
the
interlock
does
not
function
as
indicated
in
either
of
the
above
cases
DO NOT MAKE ANY ADJUSTMENT.
COMMUNICATE
WITH THE
NEAREST GENERAL
ELECTRIC COMPANY APPARATUS AND SERVICE
ENGINEERING
OFFICE FOR ADDITIONAL
IN-
STRUCTIONS.
SPRING DISCHARGE INTERLOCK
The spring
discharge
interlock
consists of
a
notched
mem-
ber
in
the
right-side track
assembly which activates the
spring
discharge
roller on the right
side
of
the
breaker. Refer
to
Fig.
9.
The
function ofthe
spring discharge
interlock
is
to
prevent
the breaker closing spring from being
charged unless
the
breaker
is
in
the
"Connect"
or
"Disconnect/ Test" position or
removed
from
the cubicle.
In addition,
it
will
mechanically
discharge
the breaker
springs
when the breaker
is
moved
between
any
of
the above mentioned positions and
prevent
recharging
by operating
the close-latch
monitoring
switch
in
the breaker spring-charging
circuit.
To
test the
function ofthe
spring-discharge
interlock
install
a
circuit
breaker
following the
instructions given
under
BREAKER INSTALLATION AND REMOVAL. For
this
test
the
control
power circuits
in
the switchgear
must
be en-
ergized.
Place
the
breaker
in
the
"Disconnect/Test" position
and
1
l-
"|
3-
4-
5-
6-
7-
Racking
Nut
Bearing
"
Jack
Screw
Rail
Disconnect/Test
Operating
Cam
Connect Slot
connect the secondary disconnect device by
pulling down
on
the
breaker handle and inserting
the
level
arm
fully in
the
breaker. This
will
actuate
the
spring-charging
motor
and
charge
the breaker-closing
springs.
Rack
the breaker
toward
the connected
position
using the
manual racking handle.
The
springdischarge interlock
should
discharge
the breaker springs
in
three
to five turn'
Continue
to
rack the
breaker
to
the
connected position.
Just before reaching
the
connected
position,
the
spring charg-
ing motor will
be re-energized
to
charge the
closing
springs.
Rack the breaker toward the
disconnected
position.
The
spring
discharge
interlcok should discharge the
breaker
closing springs
in
3
to
5
turns.
Continue
to rack
the
breaker
to
the
disconnect
position.
Re-energize
the
secondary
discon-
nect
device
as before
to
cause
the spring
charging
motor
to'charge the breaker closing
springs. Raise
the
racking
arms
to
the
release
position
and
roll
the
breaker
forward.
The
spring
discharge
interlock should
discharge
the
breaker
closing
springs
before
traveling
.50
inch
(l2.7MM).
If
the interlock
does
not function
as
indicated
DO NOT
MAKE ANY ADJUSTMENT. COMMUNICATE WITH
THE NEAREST GENERAL ELECTRIC COMPANY AP-
PARATUS
AND
SERVICE ENGINEERING OFFICE
FOR INSTRUCTIONS.
KEY LOCK
On
the
lefthand
breaker
racking
mechanism
track
is a
pro-
vision
for
a key lock. The
purpose
of this lock is to
keep
the breaker
from
closing
in
the
"Test"
and
"Connect"
posi-
tions
by
operating the
negative
interlock,
see
Fig. 8. T
remove key (3), push slide
(l)
to
the rear and extend the b
(4) of the
lock into
slot. This allows
the key
to
be
removed
an(r
prevent
the breaker
from
closing. The key
lock
does
not
pre-
vent
motion of
the racking
mechanism.
Slot
6
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