GE Magne-Blast AM-13.8-1000-3H - Troubleshooting Guide; Failure to Trip Issues

GBJ
-
88766
5
*
Check
the
stationary
arcing
contacts
to
assure
that
the
arcing
contacts
are
in
good
condition
and
that
their
connections
are
tight
.
6
.
Insulating
material
that
is
carbonized
and
cannot
be
satisfac
-
torily
cleaned
should
be
replaced
.
7
.
Any
parts
damaged
or
severely
burned and
/
or
eroded
from
arc
action
should be
replaced
.
8
.
Note
;
Fine
cracks
may
develop
in
the
fins
of the
arc
chute
sides
.
This
is
to
be
expected
with
ceramic
materials
when
sub
-
jected
to
the
high
heat of
an arc
and
may
be
disregarded
unless
they
are
long
and
present
a
possibility
of
fin
sections
break
-
ing
off
completely
.
Small
broken
corners
on
the
exhaust
end
of
the
arc
chute
will
not
interfere
with
its
performance
and
can
also
be
disregarded
.
9
.
The
trip
roller and
trip
shaft
bearings
in
the
operating
mecha
-
nism
should be
disassembled
,
,
cleaned
*
and
repacked
with
G
.
E
.
Lubricant
D
50
H
15
as
described
under
LUBRICATION
*
page
14
.
10
.
The
cup
bearing
at
the
hinge
point
of
the
contact
blade should
be
disassembled
*
cleaned
*
and
relubricated with
G
.
E
.
Contact
Lubricant
D
50
H
47
,
Contact
rings
at
the
hinge
point
between
the
contact
blade
and
bushing
may
be
lubricated
for
prolonged
life
.
The
contact
rings
should
be
inspected
for
wear
and
re
-
placed
when
reduced
in
thickness
to
less than
l
/
32
lf
•
11
.
The
stationary primary
contact
fingers
should
be
disassembled
and
the
silver
-
plated
pivot
area
of the
contact
and
contact
support
cleaned and
relubricated
with
G
.
E
,
Contact
Lubricant
D
50
H
47
.
ft
§
1
»
i
|
12
.
The
breaker
and
operating
mechanism
should be
serviced
as
de
-
scribed
for
every
1000
operations
and
properly
adjusted
before
being
put
back
into
service
.
TROUBLE
SHOOTING
Failure
of
a
breaker
to
operate
properly
will
generally
fall
within
four
general
classes
^
failure
to
trip
*
failure
to
close
or
latch closed
*
clos
-
ing
springs
will
not
recharge
*
and
overheating
.
The
following
is
a
brief
outline
showing particular
types
of
distress
that
might
be
encountered
*
together
with
suggestions
for
remedying
the
trouble
;
Failure
to
Trip
1
.
Mechanism
binding
or
sticking
caused
by
lack of
lubrication
,
REMEDY
;
Lubricate
complete
mechanism
.
.
a
19
Courtesy of NationalSwitchgear.com