Allis-Chalmers BWX-6637-5, Instruction Book

Page: 9 / 88

E.
INSTALLATION
The
11LA11
al r cl rcul t breaker Is cQmpletely adjusted,
�
t e
sted ,
and
Inspected at the f
a
c t o ry before shipment, but careful check
sho�.tld be made to be certain that shipment or storage has not resulted
in damage or c
h
a
n g e of adjustment. Circuit breaker� should be Installed
In a
c
l e
a
n
,
dry, well-ventf lated place
In
wh
i
ch the atmosphere Is free
from destructive acid or alkali
fumes. Stationary-type
breakers
should
be
m o un
t
e
d
high
e n
ou gh to
prevent I
n
j
u ry to personn�l
either from circuit
Interruption
or from moving part$ d ur i
n
g automatic opening
of
the b r e
a
k e r
.
Allow
sufficient space to
pe
r mit access
for
c l e a
n
i
n
g and
Inspection
and
adequate clearance to insulating barrier
above
the breaker
to
prevent
damage f r om arcing during int
e
r
r
up t
i
o
n
. Before i
n s � a ll l
n
g
,
make certain
that the breaker co n t a c t s are in
the open
position.
;
1.
After the breaker Is inst all e d In position, close I t manually by the
maintenance
closing method (See
S
e c ti o n Ill) to 'check p r o
p
er
functioning
of the mechanism and c
o
n
t
a
c
ts
.
(CAUTION: MAKE SURE
CIRCUIT
IS
NOT
ENERGIZED). During the
closing
operation, observe
that
the
contacts m o ve freely without Interference or r u
b
b
i n
g between
movable arcing contacts and
parts of
the arc chutes. Then refer
to
S ec t
i o
n II of
the
I
n
s t
r
uct i o
n
Book
for
a
d et
a
i
l e d description of the
circuit
b r e a ke r operating chara.cteristics befor� putting the breaker
In 5ervlce.
2.
Trip units and accessory devices should receive a thorough check
prior to placing the b r e ak er
in
s e rv i c e to be certain that adjustments
ere p r
o
p e
r
and parts are not d
a
m
a
g e d
.
J.
C
u
b i c l
e
-m
ount e d breakers of the drawout type are equipped with a draw-
.
,
out
i
n t
e
r l o
c
k to prevent movement o f a
c
l
o
s
e
d br�aker Into or out of
(
the connected position. See Section II of the lpstruction Book for a
description of the I n t e
r
l o
c
k
.
Its operation should be checked before
the breaker Is
energized.
:
4.
Upon
C9ffipletion of the installation Inspection, �he breaker is ready
to be
e
ne r g i
z
ed after the control wiring, if any, Is checked and the
(nsuJation
tested.
f. STORAGE
When breakers are not to be put Into Immediate use, they s h ou l d
be wr
a
p
p e d
or
covered with
a
non-absorbant material provide protection
from plaster, concrete
dust
or other foreign matter, Breakers should not be
exposed
to the action of corrosive gases or m o i s t u
re
�
I n
are'*s
of
high
humidity
or tempentture fluctuations, space heaters
i
r
the
equivalent should
be
provided.
.
G. MAINTENANCE
O c c a si o n a
l
checking and cleaning o
f
the breaker
will pr
om ot
e
long and trouble-free s er
v ic e
.
A
p
e
r
iodi
c inspection and servicing at least
every six months should be included in the
b
r
ea
k
e
r m�intenance routine.
'
i
If the circuit b r e a k e
r
is not operated during extended p er
i
od s
,
the breaker
should not remain in either the closed or open position any longer than
six
rnonths. Maintenance opening· and closing operations
should be
made to
ensure
freedoro
of
movement of alI
parts.
\
H. RENEWAL PARTS
When ordering renewal
parts, spec
fy the c om p l e te
name-
(
plat
�
la in c lu d i
n
g
breaker
serial number.
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