GE POWER/VAC GEK 86132A - Page 7

r
'
:
\
4
,
2.4
.
POSITIVE
INTERLOCK
BAR
This
interlock
will
prevent
the
racking
of
a
closed
breaker
into
or
out
of
a
metalclad
compartment
.
A
linkage
connected
to
the
cross
shaft
extends
a
detente
angle
(
3
,
Fig
.
II
)
out
through
the
left
side
of
the
mechanism
frame
when
the
breaker
contacts
are
in
the
closed
position
.
If
the
breaker
is
fft
;
the
“
CONNECT
”
or
“
DISCONNECT
/
TEST
”
position
in
the
metalclad
the
detente
angle
locks
into
the
racking
mechanism
to
prevent
access
to
the
hex
section
of
the
racking
screw
.
;
Closing
and
opening
springs
are
now
in
their
discharged
positions
.
Check
this
by
first
pressing
the
manual
close
button
,
then
the
manual
trip
button
.
The
indicator
flags
on
the
front
of
the
breaker
should
show
“
OPEN
"
and
“
DIS
-
CHARGED
"
.
All
mechanical
and
electrical
checks
should
be
completed
before
putting
breakers
in
service
.
4.2
.
INTERLOCKS
Each
Power
/
Vac
*
vacuum
circuit
breaker
is
provided
with
the
following
interlocks
.
i
4.2
.
5
,
CLOSING
SPRING
GAG
INTERLOCK
This
interlock
is
provided
to
prevent
a
breaker
that
has
a
gagged
closing
spring
from
entering
a
metalclad
unit
,
This
function
is
accomplished
by
projecting
an
angle
(
1
,
Fig
.
II
)
out
of
the
left
front
side
of
the
mechanism
when
the
closing
spring
is
gagged
,
This
angle
will
interfere
with
the
racking
mee
.
lj
anism
and
block
entry
into
the
metalclad
unit
when
the
Closing
Spring
Gag
Access
Door
is
open
.
4.2
,
1
.
RATING
INTERFERENCE
PLATE
This
interlock
(
l
.
Fig
.
l
)
permits
only
a
breaker
with
a
matching
continuous
current
,
voltage
and
interrupting
rating
to
be
inserted
into
a
metalclad
compartment
of
identical
rating
.
The
combination
1200
/
2000
ampere
breaker
can
be
used
in
either
a
1200
or
a
2000
ampere
compartment
,
The
rating
interference
plate
must
be
adjusted
to
match
the
current
rating
of
the
compartment
.
This
adjustment
is
done
by
positioning
the
outer
interference
plate
so
that
the
edge
of
the
plate
lines
up
with
the
current
indicated
on
the
label
attached
,
to
the
breaker
just
above
the
rating
interference
plate
.
*
•
•
•
:
*
,
•
5
.
OPERATION
The
Power
/
Vac
*
vacuum
circuit
breaker
uses
a
sealed
vacuum
power
interrupter
to
establish
and
interrupt
a
pri
-
mary
circuit
.
Primary
connections
to
the
associated
metalclad
\
’
4.2
.
2
,
CLOSING
SPRING
DISCHARGE
INTERLOCK
This
interlock
(
4
,
Fig
,
12
)
prevents
racking
into
or
out
of
the
metalclad
compartment
a
breaker
that
has
the
closing
spring
charged
.
This
action
is
accomplished
by
a
roller
on
the
right
side
of
the
breaker
mechanism
which
contacts
the
racking
mechanism
and
discharges
the
closing
spring
unless
the
breaker
is
in
the
“
DISCONNECT
/
TEST
”
position
or
the
“
CONNECT
”
position
in
the
metalclad
compartment
.
This
interlock
also
opens
the
CL
/
M
§
j
|
witch
in
the
motor
circuit
to
prevent
electrical
charging
of
the
closing
spring
when
the
breaker
is
between
the
"
DISCONNECT
/
TEST
"
and
the
“
CONNECT
"
position
in
the
metalclad
compartment
.
switchgear
are
made
by
horizontal
bars
and
disconnect
fingers
,
electrically
and
mechanically
connected
to
the
vac
-
uum
interrupters
.
Molded
supports
,
one
per
pole
oh
a
'
three
pole
breaker
,
provide
interchangeable
mountings
for
primary
bars
,
interrupters
,
current
transfer
fingers
,
and
heat
dissipation
fins
(
where
used
)
.
The
operating
mec
^
aAl
'
^
provides
vertical
motion
at
each
pole
location
in
order
to
JiH
-
move
the
lower
contact
of
the
vacuum
interrupters
front
ap
open
position
to
a
spring
-
loaded
closed
position
and
then
back
to
the
open
position
on
command
The
ML
-
18
mechanism
(
Fig
,
9
)
is
of
the
stored
-
energv
type
and
uses
a
gearmotor
to
charge
a
closing
spring
.
During
a
closing
operation
,
the
energy
stored
in
the
closing
spring
is
used
to
close
the
vacuum
interrupter
contacts
,
charge
the
wipe
springs
which
load
the
contacts
,
charge
the
opening
springs
,
and
overcome
bearing
and
other
frictional
forces
,
The
energy
then
stored
in
the
wipe
and
opening
springs
will
open
the
contacts
during
an
opening
operation
,
Closing
and
opening
operations
are
controlled
electrically
by
the
control
switch
on
the
metalclad
door
or
remote
relaying
.
Mechanical
control
is
provided
by
manual
close
and
4
,
2.3
.
NEGATIVE
INTERLOCK
ROLLER
The
function
of
this
interlock
(
5
,
Fig
,
II
)
is
to
remove
the
trip
latch
from
the
trip
roller
thereby
preventing
a
closing
operation
.
The
interlock
also
opens
the
LCS
switch
in
the
closing
circuit
thereby
removing
the
close
circuit
.
power
,
The
negative
trip
interlock
is
functional
while
the
breaker
is
being
moved
between
the
“
DISCONNECT
/
TEST
"
and
the
“
CON
-
NECT
"
position
in
the
metalclad
and
upon
withdrawal
from
the
metalclad
compartment
,
s
'
h
'
3
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