... I
!
.. ./
C.
f'4Aih7ENANCE
CLOSlNG:
During
ln$pection
prior to
Installation and
for rcutine maintenance Inspections,
the break�r
�ontacts
may
be
closed
slowly to
check
clearances, contact adjustments, and
m
o
v
e
m
e
n
t
of
l!�ks
and
l
a
t
c
h
e
s
.
The manual closing handle
is
used
for
maintenance closing
the breaker.
Electri�ally-operated breakers do
not have a manu�! closing handl�.
but
a
manual closing
handle-cam
as
s
e
m
b
ly
I s
a
v
a
i table as
a
maintenance
item.
Fig�re
5
shows
the maintenance
c
l
osi
n
g randle being in�erted
i n a�
electrically-operated breaker
after
r
em
o
v
a
l of
thf!
front
c
o
v
e
r
from
th�
bre..tker.
W
h
en
the hole
In the
maintenance closln� handle
assembly is
aligned with
the
holes in
the o
p
e
r
a
t
i
n
g
rnechanism·frame, the
pin
which
i$
attached
t
o
the chain Is
Inserted.
This
pin hqlds the
assembly In
place
and act�
as a p'vot
point for the
cam.
After insertion of the maintenance clo
s
i
n
g handle assembly on the
electrically-operated breaker, the
actual
m
a
in
t
e
n
a
n
ce
closing o
p
e
r
a
t
i
o
n
I s
the same for both the electrically-operated
breaker
and the ma��dlly
operated
breaker.
Refer
to
T
a
b
l
e
3
and
F
i
g
u
r
e
s.
TA6LE
3
1'\AINTfNANCE
CLOSING
CONTACTS:
I.
Pla�e blade
of
�crewdriver between hood and $pring
r
e
l
e
ase
lat�h. Pu�h
down
�pring relea!e
latch and
hoI d
It in
this position. ;
2.
Pull c
l
o
s
i
n
g
handle DOWN
A�L
THE
WAY
(approximately
1200)
and
SLOWLY return
to no
r
m
a
l vertical
po�ition.
a)
Contacts will close to arcing
contact tc�c
h
po5ition,
but
b
r
eak
er
� i II
net
c
l
o
$
e
completely.
OPENING
CONTACTS:
I.
Push
I
n
manual trip
r
o
d
.
CA�TION:
THE
A60VE PROCEDURE SHOULD DE
USED
FOR
MAINTENANCE
\:LOSIMi ONI.Y.
NOTE:
' '
'
Holding the
s
p
ri
n
g
release latch
down prevents
the
stored-energy·
sp
r
i
ng
s
from
propping
in
the
�harged
p
o
s
,
i
ti
o
n
.
Thus
when
the
handle is slowly
r
e
t
ur
ne
d
to
the
normal
vertical position,
the
e
n
e
r
g
y
I n
the
:�pring�
is
s
l
ow
l
y
released, against
the
clcsl11g
handle a
s�
e
m
b
l
y
cam
face.
0.
.A.DJUS
T"'HH �:
Du
ri
ng ma i ntenance insp
e
ct
i
o
n
s
,
the
following
Items
'hould
b
e
checked
to
en5ure that the original settings
are
maint
r
ined:
- 7 -
Summary of Contents for BWX-6637-5
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