GE Magne-Blast AM-13.8-1000-3H - General Maintenance Procedures; Periodic Inspection Guidelines

GEI
-
88766
Before
the
breaker
Is
finally
raised
into
position
In
the
metal
-
clad
unit
*
§
rub
a
small
amount
of
G
E
contact
lubricant
D
50
H
47
on
the
silvered
por
-
tion
of
the
breaker
studs
to
form
a
thin
coating
for
contacting
purposes
,
GENERAL
MAINTENANCE
Dependable
service
and
safer
power
equipment
are
contingent
upon
the
un
-
failing
performance
of
the
power
circuit
breaker
.
To
maintain
such
ser
-
vice
*
it
is
recommended
that
a
definite
inspection
and
maintenance
sched
-
ule
be
set
up
and
followed
*
as
serious
shutdowns
can
often
be
avoided
by
locating
potential
sources
of
trouble
in
an
early
stage
.
A
periodic
lubrication
of
parts
subject
to
wear
is
also
vitally
important
for
the
successful
operation
of
the
breaker
.
I
BEFORE
ANY
MAINTENANCE
WORK
IS
PERFORMED
*
MAKE
CERTAIN
THAT
ALL
CONTROL
CIRCUITS
ARE
OPENED
AND
THAT
THE
BREAKER
IS
REMOVED
FROM
THE
METAL
-
CLAD
UNIT
.
DO
NOT
WORK
ON
THE
BREAKER
OR
MECHANISM
WHILE
IN
THE
CLOSED
POSI
-
TION
UNLESS
THE
PROP
AND
TRIP
LATCH
HAVE
BEEN
SECURELY
WIRED
OR
BLOCKED
TO
PREVENT
ACCIDENTAL
TRIPPING
.
DO
NOT
WORK
ON
THE
BREAKER
OR
MECHANISM
WHILE
THE
SPRINGS
ARE
CHARGED
UNLESS
THEY
ARE
SECURED
IN
THAT
POSITION
BY
THE
MAINTENANCE
SPRING
BLOCICING
DEVICE
.
Periodic
Inspection
The
frequency
of
periodic
inspection
should
be
determined
by
each
opera
-
company
on
the
basis
of
the
number
of
operations
(
including
switch
-
the
magnitude
of
currents
Interrupted
*
and
any
unusual
operations
ting
ing
)
*
which
occur
from
time
to
time
.
Operating
experience
will
soon
establish
a
maintenance
schedule
which
will
give
assurance
of
proper
breaker
con
-
dition
.
On
installations
where
a
combination
of
fault
duty
and
repeti
-
tive
operation
is
encountered
*
an
inspection
is
recommended
after
any
severe
fault
operation
.
The
following
instructions
list
the
main
points
to
be
included
in
an
inspection
and
*
a
number
of
general
recommendations
.
I
Arc
Chutes
It
is
not
necessary
to
inspect
the
arc
chutes
unless
there
is
evidence
of
damage
or
if
the
arc
chutes
are
removed
for
any
reason
.
When
inspect
-
ing
an
arc
chute
*
it
should
be
disassembled
and
the
following
points
noted
:
1
.
Scale
formed
over
the
surface
of
the
arc
chute
must
not
be
removed
*
but
loose
particles
collected
in
the
chute
should
be
blown
out
.
2
.
Cracks
which
have
formed
in
the
fins
of
the
arc
chute
are
to
foe
ex
-
pected
in
ceramic
materials
of
this
type
when
subjected
to
the
severe
heat
of
an
arc
.
These
cracks
do
not
interfere
with
the
operation
of
the
device
in
any
way
and
should
be
disregarded
.
4
12
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