GE AM-4.16-250-6 - Maintenance and Inspection

GEI
-
88761
Magne
-
blast
Circuit
Breaker
tangent
to
the lower
surface of
the
probes
on
the
upper
runner
.
Proper
servicing
and lubrication
of
the breaker and
its
operating
mechanism should
maintain
these
speeds
and
no
adjustment
is
provided
.
Control
Power
Check
Motor
and
relay
switch
:
clearance
1
/
32
"
.
Interlock switch
:
maximum
clearance
1
/
32
"
.
Driving
and
Latching
Pawl
:
minimum
clearance
to
ratchet
teeth
.
015
"
.
Latch
checking
switch
contacts
make
when the
gap
between
the
trip
latch
and
the
stop
pin
is
1
/
16
"
.
Plunger
interlock
:
16
-
19
/
32
"
to
16
-
23
/
32
"
.
Check
all
nuts
,
washers
,
bolts
,
cotter
pins
,
and
terminal
connections
for
tightness
.
Inspect
all
wiring
to
make
sure
that
no
damage
has resulted
during
installation
,
and
test
for
possible
grounds
or
short
circuits
.
maximum
h
.
i
.
j
.
k
.
After
the breaker has been
operated
several
times with the
manual
charging
wrench
and the
mechanism
adjustments
are
checked
as
described
,
the
operating
voltages
should
be checked
at
the
release
coil
,
trip
coil
,
and
motor
terminals
.
Control
Power
for
electrical
operation
of
the
breaker
may
be
from
either
an
alternating
or
direct
current
source
.
The
operating
ranges
for
the
closing
and
tripping
voltages
as
given
on
the
breaker
nameplate
,
are
as
follows
:
1
.
2
.
3
.
Closing
Range
Nominal
Voltage
Tripping
Range
4
.
See
that
all
bearing
surfaces of
the mech
-
anism
have
been lubricated
.
Refer
to
the
section
on
LUBRICATION
.
(
Page
16
and
Figure
17
)
.
5
.
Operate
the breaker
slowly
with
the manual
charging
wrench
and
note
that
there
is
no
excessive
binding
or
friction
and
that
the
breaker
can
be moved
to
the
fully
opened
and
fully
closed
positions
.
6
.
See
that
any
place
where
the
surface
of
the
paint
has been
damaged
is
repainted
immed
-
iately
.
7
.
Check
the
trip
coil
plunger
and the
release
coil
plunger
to
see
that
they
move
freely
.
Opening
and
Closing
Speeds
24
v
d
-
c
48
v
d
-
c
llOv
d
-
c
12
5
v
d
-
c
220
v
d
-
c
250
v
d
-
c
115
v
a
-
c
230
v
a
-
c
14
30
v
d
-
c
60
v
d
-
c
125
v
d
-
c
140
v
d
-
c
250
v
d
-
c
280
v
d
-
c
125
v
a
-
c
250
v
a
-
c
34
-
50
v
d
-
c
80
-
115
v
d
-
c
90
-
130
v
d
-
c
160
-
230
v
d
-
c
180
-
260
v
d
-
c
95
-
125
v
a
-
c
190
-
250
v
a
-
c
28
60
70
120
140
95
190
If
the
closed
circuit
voltage
at
the
terminals
of
the
coil
or
motor
does
not
fall
in
the
specified
range
,
check
the
voltage
at
the
source
of
power
and
line
drop
between the
power
source
and
breaker
.
When
two
or
more
breakers
operating
from
the
same
control
power
source
are
required
to
close
simultaneously
,
the closed
circuit
voltage
at
the
closing
coil
or
motor
of
each breaker
must
fall
within
the
specified
limits
.
The
closing
speed
of
the
arcing
contact
of
the
breaker
should
be
a
minimum
of
11
feetper
second
.
This
represents
the
average
speed
of
the
movable
arcing
contact
from
a
point
3
"
before
the
tip
is
tangent
to
the
lower
surface
of
the
probes
on
the
upper
arc
runner
to
the
tangent
position
.
Electrical
closing
or
opening
is
accomplished
by
energizing
the
closing
or
trip
coil
circuit
.
Control
switches
are
provided
for
this
purpose
on
the
metal
-
clad
unit
.
It
is
also
possible
to
trip
or
close
the
breaker
manually
by
pressing
the manual
trip
lever
(
8
)
Figure
5
or
the
manual
close
button
(
9
)
.
The
opening
speed
of
the
arcing
contact
should
be
a
minimum
of
12
feet
per
second
.
This
repre
-
sents
the
average
speed
over
3
"
from
the
point
when
the
tip
on
the
movable
arcing
contact
is
GENERAL
MAINTENANCE
General
every
2000
operations
,
or
once
per
year
,
whichever
comes
first
.
If
the
breaker
is
also
required
to
interrupt
fault
currents
during
this
period
of
time
additional
maintenance
and
replacement
of
parts
may
be
necessary
.
Safe
and
dependable
service
from
electrical
ap
-
paratus
and
power
systems
is
contingent
upon
re
-
liable
performance
of
power
circuit
breakers
.
To
obtain
maximum
reliability
the breaker
should
be
inspected
and maintained
on
a
regular
schedule
.
The
breakers
are
designed
in
accordance
with
ap
-
plicable
standards which
require
that
they
be
capable
of
performing
up
to
5000
operations
for
1200
ampere
breakers and
3000
operations
for
2000
ampere
breakers
switching
rated
continuous
cur
-
rent
before
any
replacement
of
parts
should
be
necessary
.
breakers
being
serviced
,
or
maintained
,
at
least
BEFORE
ANY
MAINTENANCE
WORK
IS
PER
-
FORMED
,
MAKE
CERTAIN
THAT ALL
CONTROL
CIRCUITS
ARE
DE
-
ENERGIZED
AND
THAT
THE
BREAKER
IS
REMOVED
FROM
THE
METAL
-
CLAD
UNIT
.
DO NOT
WORK
ON
THE
BREAKER
OR
MECHANISM
WHILE
IN
THE
CLOSED
POSITION
UNLESS
THE
PROP
AND
TRIP
LATCH HAVE
BEEN
SECURELY
WIRED
OR
BLOCKED
TOPRE
-
This
requirement
is
based
on
the
14
Courtesy of store.ips.us