Table of Contents
Advertisement
1
0
levering handle
,
which is pivoted immedi
-
ately above the
"
T
"
handle
.
breaker
starts
to move
it is
not
necessary
to
push
.
(
b
)
Push down
on
the curved end
of
the
levering handle
as
far
as
it will
go
.
This
adds leverage
for
the necessary force for
final full
makeup
of
contacts
.
(
d )
Continue
cranking until crank
turns
freely and breaker
stops
moving
.
When
breaker is fully engaged
,
front
steel
bar
-
rier
should
be about 1
/
4 inch
or
less
from
cell frame angles
.
To
Disengage :
To Withdraw Breaker from Energized
Position
to
Test Position :
8
.
(
a
)
Lift up on
the levering handle for
initial break of
contacts
.
CAUTION
:
See Note Under
( 6 )
.
(
b ) Pull
"
T
"
handle
out as
far
as
it will
go and let it
drop
to
the vertical position
.
(
a
)
Engage crank
on
levering device
shaft
and
turn
counterclockwise until crank
rotates
freely
.
OPERATION OF STORED ENERGY
MECHANISM
(
b
) Pull
breaker toward
front of cell
until
rail latch
e n g a g e s slot
in rail
.
Breaker is then secured in
test
position
.
1
.
With breaker in cell
and secondary
contacts
engaged
,
motor
normally charges
closing spring
as soon as
control voltage is
applied
to
control circuit
.
9
.
To Withdraw Breaker from Cell
:
2
.
Normally spring is charged immedi
-
ately after each closing operation
.
(
a
)
Press down on rail latch
to
free
breaker from rail
.
3
.
Breaker is closed electrically by
ap
-
plying voltage
to
the spring release coil
,
marked
"
Lift
to
Close
" ,
through the
con
-
trol switch
.
(
b ) Pull breaker
out
of
cell
.
NOTE
:
On stored
energy
mechanisms ,
the breaker
may
close and
open as
it is
withdrawn
,
depending
on
whether
breaker
was
leftclosed
or open
,
or
whether
spring was
leftcharged ordischarged while stand
-
ing in
the
test
position
. This
is
to
discharge
closing and
opening springs
as a
safety
measure
.
4
.
Breaker is tripped electrically by
ap
-
plying voltage
to
the
trip coil
,
marked
"
Lift
to
Trip
"
,
through the control switch
.
5
.
To
Charge Closing Spring by
Hand
(
See
Fig
.
5
)
:
(
a
) Place
special ratchet wrench
on
hexagonal end of crank
shaft
.
On 5 KV
breakers this
projects
from the R
.
H
.
side
of
breaker chassis
.
On
15 KV breakers
this
is inside the chassis panel opening
,
to
the left of the maintenance closing handle
socket
.
(
b
) Charge spring with
several
down
-
ward
movements
of ratchet wrench
until
10
.
To Engage Secondary Contacts with
Breaker
in Test Position
(
See Figs
.
4
a
and 4
b )
:
(
a
)
Lift
"
T
"
handle
on L
.
H
.
side
at
front of chassis
to
a horizontal
position
.
Lift
further to
disengage
notch in rod
from
top
edge
of
panel and push
toward
rear
of
breaker
.
The small horizontal pin in
"
T
"
handle should
engage
the 2 slots in the
Advertisement
Table of Contents
