GE Magne-Blast AM-13.8-1000-3H - Insulation Test Procedure

GEI
-
88766
If
the
contacts
are
burned
and
pitted
,
they
should
,
be
made
smooth
with
a
fine
file
.
ft
After
completing
inspection
of
contacts
,
check
the
contact
adjustments
as
specified
under
ADJUSTMENTS
.
Mechani
stu
A
careful
inspection
should
be
made
to
check
for
loose
nuts
or
bolts
and
broken
retaining
rings
.
All
cam
,
roller
,
and
latch
surfaces
should
be
inspected
for
any
evidence
of
damage
or
excessive
wear
.
Lubricate
the
mechanism
as
outlined
below
,
then
,
using
the
manual
charging
wrench
,
and
close
the
breaker
several
times
to
make
certain
that
the
mechanism
operates
freely
throughout
its
entire
stroke
.
Check
the
mechanism
ad
-
justments
as
specified
under
ADJUSTMENTS
.
Check
all
terminal
connections
.
open
ij
VYI
Bushings
and
Insulation
The
surface
of
the
bushings
should
be
kept
clean
and
unmarred
to
prevent
moisture
absorption
.
If
the
insulation
surface
should
become
damaged
,
it
should
be
sanded
and
cleaned
,
and
should
be
refinished
with
either
clear
varnish
or
clear
resin
insulation
parts
on
the
breaker
should
be
kept
clean
and
dry
.
Smoke
or
dust
collected
between
inspection
periods
should
be
wiped
off
,
and
if
dampness
is
apparent
,
heaters
should
be
installed
to
insure
dryness
.
All
other
Allow
to
dry
smooth
and
hard
.
Insulation
Test
When
insulation
has
been
repaired
or
replaced
,
or
when
breaker
has
been
stored
under
adverse
conditions
,
it
is
recommended
that
the
insulation
be
checked
before
the
breaker
is
placed
in
service
.
A
standard
60
cycle
high
potential
test
at
27
,
000
volts
RMS
will
normally
indicate
whether
the
breaker
is
satisfactory
for
service
.
With
the
breaker
contacts
in
the
fully
open
position
,
apply
the
high
potential
to
each
terminal
of
the
breaker
individually
for
one
minute
with
all
other
terminals
and
the
breaker
frame
grounded
ganic
insulating
materials
,
these
materials
should
be
inspected
for
visible
leakage
current
paths
,
and
necessary
action
must
be
taken
to
re
-
place
insulation
that
may
have
been
affected
by
moisture
absorption
.
If
the
breaker
secondary
wiring
is
to
be
given
a
hi
-
potential
test
at
1500
volts
,
remove
both
of
the
motor
leads
from
the
terminal
boards
.
Failure
to
disconnect
the
motor
from
the
circuit
may
cause
damage
to
the
winding
insulation
.
After
high
potential
tests
are
made
on
or
-
m
LUBRICATION
In
order
to
maintain
reliable
operation
,
it
is
important
that
all
cir
-
cuit
breakers
be
properly
lubricated
at
all
times
.
Most
of
the
bearings
and
rolling
surfaces
utilize
a
new
type
of
dry
insulation
that
will
re
-
quire
no
maintenance
and
will
last
the
life
of
the
equipment
.
Only
few
#
14
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