ITE K-3000 - Maintenance and Inspection Procedures; Safety Notes for Maintenance; Periodic Maintenance Inspection

IB
-
9.1
.
7
-
4
LOW
-
VOLTAGE
POWER
CIRCUIT
BREAKERS
PAGE
10
\
If
closing
springs
are
discharged
,
manually
charge
mg
springs
by
means
of
the
manual
charge
lever
\
12
)
then
pull
the
manual
close
lever
(
6
)
by
a
lanyard
from
a
safe
distance
.
c
.
If
springs
are
charged
,
poll
the
manual
close
lever
(
6
)
by
means
of
a
lanyard
from
u
safe
distance
.
d
.
For
partially
charged
closing
springs
,
should
clos
-
ing
not
Occur
upon
pulling
the
manual
close
lever
,
con
-
tinue
charging
until
closing
springs
are
completely
charged
(
heard
to
snap
)
and
by
visual
indicator
(
1 4
)
,
then
pull
manual
close
lever
(
6
)
by
means
of
a
lanyard
from
<
»
s
«
ife
distance
.
250
no
load
or
load
current
switching
operations
.
If
250
operations
are
not
completed
in
the
first
year
of
service
,
the
circuit
breakers
should
be
inspected
re
-
gardless
.
The
circuit
breaker
should
also
be
inspected
after
a
short
circuit
or
severe
overload
interruption
,
regardless
of
time
period
or
number
of
operations
.
Where
unusual
service
conditions
,
as
covered
by
AN
Standard
C
37.13
,
exist
,
it
must
be
assumed
that
these
conditions
were
considered
at
the
time
of
order
;
that
the
equipment
supplied
was
designed
for
the
special
application
,
-
and
that
an
appropriate
supplemental
maintenance
program
lias
been
developed
These
main
-
tename
mstim
fions
only
«
over
<
in
oit
hteakers
used
uniji
-
4
tin
:
JUliUU
!
d
Nie
m
»
pe
*
turn
dniuld
in
;
hide
opening
and
•
toMng
the
l i f t
nit
breaker
elec
tricall
/
and
manual
!
/
fhe
unit
should
be
visually
inspec
ted
tui
loose
oi
duimitjed
pints
Arc
chutes
,
contacts
and
insulation
structure
should
be
inspected
as
described
below
.
f
rid
<
h
t
/
ii
CIRCUIT
BREAKER
REMOVAL
tUrawout
iypei
(
See
Figure
I
)
a
.
Trip
circuit
breaker
by
any
tripping
means
b
.
Open
front
compartment
door
.
c
.
Engage
racking
crank
{
1 3
)
in
opening
(
1 7
)
and
push
drawout
lever
(
1 5
)
down
.
Rotate
racking
crank
counterclockwise
until
racking
mechanism
automatically
stops
at
“
TEST
”
position
.
Lower
track
extensions
.
d
.
Repeat
step
"
C
"
to
rack
circuit
breaker
to
“
DIS
-
CONNECT
‘
position
e
.
Depress
drawout
lever
(
1 5
)
and
continue
rank
-
ing
counterclockwise
as
far
as
stops
will
allow
.
(
Do
not
force
beyond
stops
.
)
f
.
Pull
circuit
breaker
forward
to
fully
extended
posi
-
l
.
(
Should
the
circuit
breaker
be
charged
,
closing
mgs
will
automatically
be
discharged
at
this
point
.
)
g
.
Remove
circuit
breaker
from
tracks
with
lifting
yoke
,
then
raise
tracks
into
compartment
and
close
door
.
ARC
CHUTES
If
the
circuit
breaker
has
a
solid
state
overcurrent
trip
device
,
it
is
necessary
to
remove
two
/
<
"
diameter
screws
fastening
die
solid
state
control
assembly
,
so
that
the
control
assembly
con
be
mover
!
to
peimit
removal
of
the
arc
chute
.
a
.
Remove
two
arc
chute
mounting
screws
(
3
,
Figure
1
)
and
retainer
molding
(
2
)
.
Lift
arc
chute
(
I
)
up
and
draw
out
.
b
.
Inspect
for
breakage
to
side
moldings
,
center
moldings
,
arc
plates
and
liner
plates
.
Check
for
pres
-
ence
of
foreign
particles
such
as
chips
of
moldings
and
metal
.
(
MAINTENANCE
AND
ADJUSTMENTS
INSULATION
STRUCTURE
SAFETY
NOTES
De
-
energize
both
primary
and
control
circuits
before
making
any
inspections
,
adjustments
or
replacements
of
parts
.
Make
certain
breaker
is
open
by
observing
indicator
(
5
,
Figure
I
)
,
and
closing
springs
are
not
charged
by
observing
indicator
(
1 4
,
Figure
1
)
.
When
it
is
necessary
that
the
charging
springs
be
charged
,
or
the
circuit
breaker
be
closed
,
make
sure
to
stay
clear
of
operating
parts
.
Stationary
breakers
should
be
checked
for
operation
with
the
control
circuit
energized
and
the
primary
power
de
-
energized
.
Drawout
breakers
should
be
withdrawn
to
“
TEST
*
'
position
for
checking
the
breaker
operation
.
For
further
inspection
,
adjustments
,
cleaning
or
replace
-
ment
of
parts
,
the
drawout
circuit
breaker
should
be
withdrawn
and
moved
to
a
suitable
area
.
Stationary
breakers
should
likewise
be
removed
,
but
,
if
removal
is
not
possible
,
then
the
primary
and
control
circuit
sources
MUST
BE
DE
-
ENERGIZED
.
Insulated
putts
should
he
i
IUM
ke
<
l
for
damage
Dust
and
dirt
should
be
removed
by
an
or
wiped
with
a
clean
lintless
cloth
.
Do
not
use
any
oil
base
solvents
CONTACTS
a
.
Remove
dirt
or
grease
on
contacts
with
a
clean
lintless
cloth
.
b
.
Discoloration
of
the
main
contacts
does
not
ne
<
es
sarily
indicate
damage
.
However
,
this
condition
may
be
removed
by
opening
and
closing
the
circuit
breaker
under
no
-
load
conditions
.
CONTACT
PITTING
a
.
A
moderate
amount
of
pitting
will
not
interfere
with
the
operation
of
Ihe
arcing
contacts
.
Should
it
be
necessary
to
dress
the
arcing
contacts
to
remove
small
burrs
,
cover
the
mechanism
with
a
cloth
.
Follow
the
contour
of
the
contacts
with
light
wipes
of
a
fine
file
and
do
not
attempt
to
eliminate
pitting
entirely
.
When
finished
,
remove
cloth
and
wipe
off
any
remaining
dirt
or
filings
.
Do
not
use
emery
cloth
or
the
like
for
sanding
contacts
.
The
material
deposits
affect
contin
-
uous
current
ability
adversely
.
b
.
Should
the
main
contacts
show
more
than
moder
-
ate
pitting
,
check
the
contact
pressure
.
PERIODIC
MAINTENANCE
INSPECTION
The
safety
and
successful
functioning
of
the
con
-
cted
apparatus
depends
upon
the
proper
operation
of
the
circuit
breaker
.
Therefore
,
it
is
recommended
that
a
maintenance
program
be
established
that
will
pro
-
vide
for
a
periodic
inspection
of
the
circuit
breaker
after
(
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