GE AM-13.8-500-5A User manual

GEI
-
88764
A
INSTRUCTIONS
SUPERSEDES
GEI
-
88764
AND
RENEWAL
PARTS
AM
-
13.8
-
500
-
5
A
AM
-
13.8
-
500
-
5
AB
AM
-
13.8
-
500
-
5
C
AM
-
13.8
-
500
-
5
CB
AM
-
13.8
-
500
-
5
H
AM
-
13.8
-
500
-
5
HB
<
CONTENTS
1
Introduction
Receiving
,
Handling
2
and
Storage
2
Installation
Description
of
4
Operation
7
Adjustments
12
General Maintenance
Renewal
Parts
30
SWITCHGEAR
DEPARTMENT
GENERAL
m
VM
'
j
ELECTRIC
PHILADELPHIA
,
P A
.
Courtesy of NationalSwitchgear.com

;
r
Courtesy of NationalSwitchgear.com

GEI
-
88764
MAGNE
-
BLAST
CIRCUIT
BREAKER
AM
-
13
•
8
-
500
-
5
(
A
)
A
Letter
Designation
A
,
B
,
C
,
and
H
,
used
immediately
following
the model
number
indicates
basic
design
features
.
INTRODUCTION
The
magne
-
blast
circuit breaker
is the
removable
interrupting
element
for
use
in
vertical
-
lift
metal
-
clad
switchgear
,
to
provide
reliable
control
and
protection
of
power
systems
.
Among
the
many
advantages
of
metal
-
clad
switchgear
are
added
protection
to
equipment
and
personnel
,
compactness
,
simplified
installation
and
reduced
maintenance
.
In
keep
-
ing
with
these
features
the
magne
-
blast breakers
are
designed
for
in
-
terchangeability
and
maneuverability
,
together
with
reliability
and
low
maintenance
requirements
.
The
magne
-
blast circuit
breaker
operates
on
the
principle
that
an arc
can
be
interrupted
in
air
by
sufficiently
elongating
and
cooling
it
.
This
is
accomplished
by
means
of
a
strong
magnetic
field
that
lengthens
the
arc
and
forces
it
into
intimate
contact
with
cool
dielectric
ma
-
terial
.
A
sturdy
,
reliable
operating
mechanism
assures
low
maintenance
and
long
life
.
0
magne
-
blast
breaker
Is
available
In
a
number of
current
Refer
to
the
breaker
nameplate
for
the
complete
rating
mation
of
any
particular
breaker
,
imposed
on
the
breaker
must not
exceed
its
rating
,
nor
should
it be
called
upon
to
operate
at
voltages
or
currents
greater
than
those
given
on
the
nameplate
.
Since
this book is
written
to
cover
several
ratings
of
breakers
that
are
of the
same
general
design
,
all
instructions
will
be
of
a
general
character
and
all
illustrations
will
be
typical
,
unless
otherwise
specified
.
infor
-
The
short
circuit conditions
to
be
PROPER
INSTALLATION
AND
MAINTENANCE
ARE
NECESSARY
TO
INSURE
CONTINUED
SATISFACTORY
OPERATION
OF
THE BREAKER
.
The
following
instructions
will
provide
complete
Information
for
placing
magne
-
blast breakers
in
ser
-
vice
and
for
maintaining
satisfactory operation
.
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
to
provide
for
every
possible
contingency
to
be
met
in
connection
with
installation
,
operation
or
maintenance
.
Should
further
information
be
desired
or
should
particular problems
arise
which
are
not
covered
sufficiently
for
the
purchasers
purposes
,
the
matter
should
be
referred
to
the
General
Electric
Company
.
1
Courtesy of NationalSwitchgear.com

GEI
-
88
?
64
RECEIVING
,
HANDLING
,
AND
STORAGE
Receiving
and
Handling
Each
breaker
is
carefully
inspected
and
packed
by
workmen
experienced
in
the
proper
handling
and
packing
of
electrical
equipment
.
Immediate
-
ly
upon
receipt
of
the
circuit
breaker
,
an
examination
should
be
made
for
any
damage
sustained
in
transit
.
If
injury
or
rough
handling
is
evident
,
a
damage
claim
should
be
filed
immediately
with
the
transpor
-
tation
company
and
the
nearest
General
Electric
Sales
Office
should
be
notified
.
It
is
expected
that
due
care
will
be
exercised
during
the
unpacking
and
installation
of
the
breaker
so
that
no
damage
will
occur
from
care
-
less
or
rough
handling
,
or
from
exposure
to
moisture
or
dirt
.
Loose
parts
associated
with
the
breaker
are
always
included
in
the
same
crate
.
Check
all
parts
against
the
packing
list
to
be
sure
that
no
parts
have
been
overlooked
.
Storage
It
is
recommended
that
the
breaker
be
put
into
service
immediately
in
its
permanent
location
.
If
this
is
not
possible
,
the
following
pre
-
cautions
must
be
taken
to
insure
the
proper
storage
of
the
breaker
:
1
.
The
breaker
should
be
carefully
protected against
condensation
,
pre
-
ferably
by
storing
it
in
a
warm
dry
room
,
since
water
absorption
has
an
adverse
effect
on
the
insulation
parts
.
Circuit breakers
for
out
-
door
metal
-
clad
switchgear
should
be
stored
in
the
equipment
only
when
power
is
available and
the
heaters
are
in
operation
to
prevent
condensation
.
2
.
The
breaker
should
be
stored
in
a
clean
location
,
free
from
corrosive
gases
or
fumes
;
particular
care
should
be
taken
to
protect
the
equip
-
ment
from
moisture
and
cement
dust
,
as
this
combination
has
a
very
corrosive
effect
on
many
parts
.
3
.
Machined
parts
of
the
operating
mechanism
,
etc
with
a
heavy
oil
or
grease
to
prevent
rusting
.
If
the
breaker
is
stored
for
any
length
of
time
,
it
should
be
Inspected
periodically
to
see
that
rusting
has
not
started
and
to
insure
good
mechanical
condition
.
Should
the
breaker
be
stored
under
unfavorable
atmospheric
conditions
,
steps
should
be
taken
to
dry
out
the
breaker
before
it
is
placed
in
service
.
INSTALLATION
should
be
coated
•
9
1
.
Remove
the
box
barrier
and
front
cover
and
make
a
visual
inspection
to
ascertain
that
the
breaker and
mechanism
is
in
satisfactory
con
-
dition
.
Check
all
bearing
surfaces
of
the
mechanism
for
lubrication
.
Refer
to
section
on
Lubrication
(
page
15
)
.
2
Courtesy of NationalSwitchgear.com

GEI
-
88
F
6
*
2
.
Charge
the
breaker
closing wrings
manually
using
a
5
/
8
"
ratchet
wrench
to turn
the
driving
eccentric
(
6
)
Fig
.
4
.
Turning
the
eccen
-
tric
counter
clockwise
will
advance
the
ratchet
wheel
and
compress
the
springs
.
When the
springs
have
reached
the
fully
charged
position
the
indi
-
cator
(
10
)
Fig
.
4
will
read
"
CHARGED
"
,
and
the
driving
pawl
will
he
raised
from
the
ratchet
wheel teeth
.
Additional
turning
of the
ec
-
centric
will
not
advance
the
ratchet
wheel
.
Insert
the
spring
blocking
device
(
4
)
Fig
.
4
and
manually discharge
the
springs
against
the
pins by
pushing
the
manual
release
button
(
1
)
Fig
.
4
.
The
springs
are
now
blocked
and
slow
closing
of
the
breaker
contacts
can
be
accomplished by
again
turning
the
driving
eccentric
with
a
5
/
8
ratchet wrench
.
During
the
slow
closing
operation
check
to
insure
that
the
mechanism
does
not
stick
or
bind
during
the
entire
stroke
,
that
it
latches
se
-
curely
in
the
closed
position
,
said that
it
trips
freely
when
the
man
-
ual
trip
lever
is
operated
.
The
breaker
should
not
be
operated
electrically
until
It
has
been
operated
several
times
manually
to
insure freedom
of
action
.
At
this
time
,
also
check
the
following
adjustments
:
Refer
to
page
7
Refer
to
page
7
Refer
to
page
7
a
.
Primary
contact
wipe
b
.
Arcing
contact
wipe
e
.
Primary
contact
gap
"
DO NOT WORK ON
EITHER THE BREAKER
OR
MECHANISM
UNDESS
THE
CLOSING
SPRINGS
ARE
BLOCKED
AND
THE
OPENING
SPRINGS
HAVE
BEEN
TRIPPED
OPEN
OR
MECHANICALLY
BLOCKED
.
THIS
PRECAUTION IS
REQUIRED
TO
PREVENT
ACCIDENTAL CLOSING
OR TRIPPING
.
"
1
After the
adjustments
have
been
checked
,
the
springs
can
be
un
-
blocked
.
Rotate
the
driving
eccentric
until
the
indicator
reads
"
CHARGED
"
and
the
ratchet
wheel
no
longer
is
advanced
.
The
blocking
device
can
now
be
removed
.
3
.
Attach
test
coupler
to
circuit breaker
and
operate
electrically
several
times
.
Check
the
control
voltage
as
described
under
"
CON
-
TROL
POWER CHECK
"
.
NOTE
:
If
the
breaker
secondary
wiring
is
to
be
given
a
hi
-
potential
test
at
1500
volts
,
remove
both the
motor
leads
from
the
terminal
connection
.
Failure
to
disconnect
the
motor
from
the
circuit
may
cause
damage
to
the
winding
insulation
.
4
.
Remove
the
test
coupler
and
replace
box
barrier
.
/
W
:
3
Courtesy of NationalSwitchgear.com

GEI
-
88764
5
.
If
breaker
has
been
stored
for
a
long
period
of time
,
it is
recom
-
mended
that
the
insulation
be
checked
with
a
standard
60
cycle
high
potential
test
.
Refer
to
Insulation
Test
(
pagel
5
)
.
6
.
Lubricate
the
silver
portion
of
the
primary
disconnect
studs
by
rubbing
a
small
amount
of
contact
lubricant
D
50
H
47
to
form
a
thin
coating
on
the
ball
contact
.
7
.
Refer
to
metal
-
clad
instruction
book
GEH
-
1802
for
final
instructions
before
inserting
the
breaker
into the
metal
-
clad
unit
.
DESCRIPTION
OP
OPERATION
:
/
The
magne
-
blast
breaker
is
composed
of
two
major
parts
,
the
breaker
element
and
the
operating
mechanism
.
The
breaker
element
comprises
three
similar
pole
units
,
each
pole
unit
consisting
of
main
and
arcing
contacts
,
an
interrupter
,
and
an
enclosing
box
barrier that
segregates
the
interrupting
units
from
each
other
to
provide
Insulation
between
phases
as
well
as
from
each
phase
to
ground
.
The
primary
connections
to
the
associated
metal
-
clad
equipment
are
made
through
the
primary
disconnect
studs
.
The
ML
-
13
operating
mechanism
shown
in
Figures
1
,
2
,
and
3
is
of
the
stored
energy
type
designed
to
give
high
speed
closing
and
opening
.
The
mechanism
will
operate
on
a
-
c
or
d
-
c
voltage
as
indicated
on
the
breaker
name
plate
.
Closing
and
opening
operations
are
controlled
electrically
by
the
metal
-
clad
or
remote
relaying
,
.
.
and
mechanically
by
the
manual close
and
trip
levers
on
the
breaker
.
All
secondary
connections
from
the
breaker
to
the
metal
-
clad
unit
are
made
through
the
coupler
(
l
)
Fig
.
1
.
A
positive
interlock
(
2
)
Fig
.
3
and interlock switch
(
2
)
Fig
.
1
are
provided
between
the
breaker and
metal
-
clad
unit
to
prevent
raising
or
lowering
of
the
breaker
in
the
unit while
in
a
closed
position
and
to
prevent
a
closing
operation
when
the
breaker
is
not
in
either
the
fully
raised
or
lowered
position
.
A
plunger
can
also
be
provided
to
operate
an
additional
auxiliary
switch
mounted
in
the
metal
-
clad
unit
.
The
operating
mechanism
used
on
those
breakers
designed
for
MI
-
6
metal
-
clad
equipment
differs
somewhat
from
those
designed
for
M
-
3
o
equipment
but
,
its
operation
is
principally
the
same
.
These
breakers
are
identi
-
fied
by
the
"
A
”
suffix
In
the
breaker
nomenclature
.
This
mechanism
is
controlled
by
a
relay
in
the
metal
-
clad
unit
to
make
it
computable
with
solenoid
operated
breakers
.
Two
seven
point
ter
-
minal
secondary
couplers
also
replace
the
one
sixteen
terminal
coupler
.
The
positive
interlock
between the
breaker
and
metal
-
clad
unit
is
re
-
placed
with
a
trip
interlock
that
trips
the
mechanism
before
raising
or
lowering
of
the
breaker
can
be
accomplished
.
A
fork
-
type
lever
can
be
furnished
to
operate
an
auxiliary
switch
mounted
in
the
metal
-
clad
mit
.
Motor
circuit
fuses
are
mounted
on
the
breaker
for
protection
.
4
Courtesy of NationalSwitchgear.com

GEI
-
88764
When
the
breaker
is
interchangeable
with
MS
-
13
solenoid
operated
breakers
in
M
-
36
metal
-
clad
units
,
motor
circuit
fuses
are
mounted
on
the
breaker
for
protection
.
These
breakers
are
identified
by
the
"
C
"
suffix
in
the
breaker
nomenclature
.
,
Vf
•
*
Spring
Charging
The
mechanism
consists
of
a
high
speed
.
gear
motor
that
compresses
a
set
of
closing springs through
the
action
of
a
simple
eccentric
,
ratch
-
et
,
and
pawl assembly
.
The
rotary
action
of
the
motor
(
2
)
Fig
.
4
is
converted
to
a
short
straight
stroke
pumping
action
through
the
eccent
-
ric
(
6
)
and
a
lever
that
carries
a
spring
loaded
driving
pawl
(
5
)
.
The
pawl
advances
the
ratchet
wheel
(
3
)
Fig
.
3
only
a
few
degrees
each
stroke
where it is held
in
position
by
the
latching
pawls
(
l
)
,
When
the
ratchet
wheel
has
been
rotated
approximately
loG
degrees
the
clos
-
ing
springs
(
6
)
will
be
fully
compressed
.
As
the
ratchet
wheel
con
-
tinues
to
rotate
,
the
spring
load
will
shift
over
center
and
attempt
to
discharge
.
After
only
a
few
degrees
of
rotation
,
the
closing
roller
(
10
)
Fig
.
1
will
engage
the
closing
latch
(
11
)
and
the
compressed
springs
will
be held
in
repose
until
a
closing operation
is
required
.
During
the
last
few
degrees
of the
ratchet
wheel
rotation
the
motor
and
interlock
switches
(
6
)
are
released
and
the
driving
pawl
is
raised
from
the
ratchet
wheel
surface
.
This
allows
the
motor
and
driving
mechanism
to
coast
to
a
natural
stop
expending
all
residual
energy
.
During
the
time
the
springs
are
being compressed
a
relay
(
6
)
Fig
.
6
locks
the
closing
power
circuits
open
and
the
relay
will
remain
ener
-
gized
until the
springs
are
fully
charged
and
the
control
contacts
are
re
-
set
.
The
closing
springs
may
be
charged manually
if
control
voltage
is
lost
.
A
5
/
8
”
ratchet
wrench
can
be used
to
rotate
the
eccentric
in
a
counter
clockwise
direction
until the
indicator
reads
“
CHARGED
"
and
the
driving
pawl
no
longer
engages
the
ratchet
wheel
.
The
use
of the
ratchet
wrench
provides
for
maximum
safety
in
the
event
that control
power
is
suddenly
In
this
event
,
the
motor
drive
will
take
over
restored
without
warning
again
and
continues
to
charge
the
springs
.
Closing
Operation
Closing
the
breaker
is
accomplished
by
energizing
the
closing
solenoid
or
by
manually pressing
the
close
button
.
In
either
case
,
the
closing
latch
is
removed from
the
spring
blocking
location
allowing
the
springs
to
discharge
.
The
energy
of the
springs
is
applied
to
the
rotation
of
a cam
(
16
)
Fig
.
5
that closes
the
breaker
through
a
simple
linkage
that
remains
trip
free
at
all
times
.
A
monitoring
switch
(
11
)
Fig
.
6
on
the
closing
latch
will
start
the
spring charging
motor
after
it
is
fully
reset
.
Ui
:
•
5
Courtesy of NationalSwitchgear.com

GEI
-
88764
Opening Operation
An
electrical
opening
operation
is
initiated
by
energizing
the
trip
coil
.
This
is
accomplished
either
by
actuating
the
opening
control
switch
on
the
metal
-
clad
unit
or
by
a
combination
of
relays
and
current
devices
used
to
detect
a
fault
on
the
load
side
of the
breaker
,
energizing
the
trip
coil
,
the
trip
plunger
rotates
the
trip
latch
(
7
)
,
Pig
*
5
>
causing
the
operating
mechanism
linkage
to
collapse
.
The
energy
stored
in
the
opening
springs
is thus
released
,
opening
the
breaker
.
During
this
operation
*
the
trip
coil circuit
is
deenergized
,
and
upon
completion
of
the
opening
operation
,
the
operating
mechanism
is returned
to
its
normal
position
,
ready
for
closing
.
As
the
breaker
opens
,
the
main
contacts
part
first
,
shunting
the
cur
-
rent
through
the
arcing
contacts
.
An
arc
forms
as
the
arcing
contacts
part
.
See
Fig
.
7
*
As
the
movable
arcing
contact
(
7
)
is
withdrawn
through
the
probes
in
the
arc
runner
,
the
upper
end
of
the
arc
is
trans
-
ferred
to
the
upper
arc
runner
(
4
)
.
To
assist
the
interruption
at
this
point
,
a
stream
of
air
is
emitted
from
the booster
tube
(
25
)
and forces
the
arc
onto
the lower
arc
runner
(
8
)
.
Establishment
of
the
arc
on
the
runners
automatically
inserts the blowout
coils
into
the
circuit
,
intro
-
ducing
a
magnetic
field
between the
pole
pieces
which
tends
to
draw
the
arc
away
from the
arcing
contacts
.
The
interrupter
contains
three
up
-
per
blowout
coils
and
three
lower
blowout
coils
each
Individually
con
-
nected
in
series
with
its
respective
section
of
arc
runner
.
As
the
arc
is
forced
outward
along
the
diverging
arc
runners
,
the
magnetic
field
is
progressively
increased
with
the
addition
of
each coil
in
the
cir
-
cuit
.
By
;
v
'
At
the
same
time
,
the
arc
is
being
forced
into
the
arc
chute
(
3
)
which
is
composed
of
a
series of
gradually interleaving insulating
fins
.
These
fins
,
which
project
alternately
from
the
two
opposite
inner
sur
-
faces
of
the
chute
,
elongate
the
are
into
a
gradually
deepening
serpen
-
tine
path
,
so
that
the
electrical
resistance
in
the
path
of
the
arc
is
rapidly
increased and
the
heat
from
the
arc
is
absorbed
.
The
increased
resistance
reduces
both
the
magnitude
and
the
phase
angle
of the
current
,
and
at
an
early
current
-
zero
the
arc
path
Is
so
long
and
the
gases
pro
-
duced
by
the
arc
so
cooled
that
the
arc
cannot
reestablish
itself
and
,
interruption
occurs
.
Manual
tripping
follows
the
same
procedure
except
that
instead
of
ener
-
gizing
the
trip
circuit
,
the
manual
trip
(
11
)
Fig
.
2
is
used
.
Trip
Free
Operation
If
the
trip
coil
circuit
is
energized
while
the
breaker
is
closing
,
the
trip
pi
roller
re
-
open
.
springs
will
re
-
charge
as
in
a
normal
closing operation
.
er
will
force
the
trip
latch
(
8
)
Fig
.
5
away
from
the
trip
causing
the
mechanism
linkage
to
collapse
and
the
breaker
to
The
closing
cam
(
l
6
)
will
complete
its
closing
stroke
and
the
(
§
?
try
aL
:
'
6
Courtesy of NationalSwitchgear.com

GEI
-
88764
ADJUSTMENTS
All
adjustments
should
he
checked
during
periodic
inspections
and
when
-
ever
it
becomes
necessary
to
repair
or
replace
parts
that
have
become
worn
or
defective
while
in
service
.
The
following
adjustments
are
listed
in
the
order
in
which
they
are
to
be
checked
.
First
,
however
,
remove
the
breaker
from
the
metal
-
clad
unit
and
remove
the
box
barriers
and
front
cover
.
"
DO
NOT
WORK
ON
EITHER
THE
BREAKER
OR
MECHANISM
UNLESS
THE
CLOSING
SPRINGS
ARE
BLOCKED
AND
THE
OPENING SPRINGS
HAVE
BEEN
TRIPPED
OPEN
OR
MECHANICALLY
BLOCKED
.
THIS
MEASURE IS
REQUIRED
TO
PREVENT
ACCIDENTAL
CLOSING
OR
TRIPPING
.
”
Primary
Contact
Wipe
When
the
breaker
is
closed
,
as
shown
in
Fig
.
8
,
the
stationary
primary
contacts
(
l
)
should
rise
5
/
l
6
”
-
f
0
—
l
/
l
6
”
.
Before
cheeking
this
dimen
-
sion
be
sure
the
mechanism
is
re
-
set
so
that
the
prop
pin
(
13
)
Fig
.
5
is
resting
on
the
prop
.
To
obtain
the
proper
contact
adjustment
,
open
the
breaker
and
,
referring
to
Fig
.
9
,
loosen
the
check
nut
(
4
)
and
turn
the
adjusting
nut
(
3
)
.
Screwing
up
on
the
adjusting
nut
will
decrease
the
primary
contact
wipe
,
down
will
increase
it
.
Tighten
the
check
nut
,
close
the
breaker
and
recheck
the
wipe
.
With
the
primary
contact
wipe
correctly
adjusted
,
the
clearance
between
the
contact
arm
(
6
)
and
the
buffer
block
should
be
l
/
l
6
"
or
greater
(
as
shown
in
Fig
.
8
)
breaker
is
fully
closed
.
Arcing
Contact
Wipe
Refer
to
Fig
.
8
.
Close
the
breaker
until the
arcing
contacts
just
touch
.
This
can
be
determined
with
the
use
of
a
circuit
continuity
tester
such
as a
light
indicator
or
bell
set
.
In
this
position
,
the
gap
between
the
stationary
primary
contacts
(
l
)
and
the
movable
primary
contact
(
2
)
should be
5
/
l
6
"
or
greater
.
This
setting
has
been
made
in
the
factory
and
no
adjustment
is
provided
.
A
wipe
of
less
than
5
/
16
”
is
usually
an
indication
that
the
arcing
contacts
need
to
be
replaced
.
When
making
this
check
,
also
see
that
the
movable
'
arcing
contact
(
5
)
passes
between the
probes
on
the
upper
arc
runner
without
touching
.
Primary
Contact
.
Gap
when
the
Refer
to
Fig
.
9
-
With
the
breaker
closed
,
press
the
manual
trip
button
allowing
the
breaker
to
trip
open
normally
.
Do
not
force
the
contacts
open
wider
by
hand
.
The
gap
between
the
stationary
primary
contacts
(
3
)
and
the
movable
primary
contact
(
6
)
should
be
5
-
1
/
4
”
+
5
/
16
"
—
1
/
8
”
.
To
change
this
gap
,
loosen
the
check
nut
(
17
)
,
Fig
.
5
and
turn
the
adjusting
nut
(
18
)
on
stud
(
19
)
decrease
the
primary
contact
gap
.
Tighten
the
check
nut
and
re
-
measure
the
contact
gap
(
close
and
trip
the
breaker
before
checking
the
mea
-
surement
)
.
.
Screwing
the
adjusting
nut
down
will
*
7
Courtesy of NationalSwitchgear.com

GEI
-
88764
Trip
Latch
Wipe
Refer
to
Pig
.
5
.
The
wipe
of the
trip
latch
(
8
)
on
the
trip
roller
(
9
)
should he
from
3
/
18
”
to
1
/
4
”
.
This
can
be
measured
by putting
a
film
of
grease
on
the
latch
(
8
)
,
closing
the
breaker
part
way
*
and
tripping
.
The
mechanism
has
the
proper
trip
latch
wipe
when
the
latch
rests
against
the
stop
pin
(
23
)
.
No
adjustment
is
provided
and
a
visual
,
in
-
spection
is
usually
all
that
is
required
.
If
this
setting
is
not
cor
-
rect
,
look for
insufficient travel
of
the
trip
shaft
(
7
)
.
WHEN
WORKING
ON
THE
MECHANISM
IN
THE
CLOSED POSITION
,
KEEP
FINGERS
CLEAR
OF
THE
LINKAGE
,
AS
ACCIDENTAL
TRIPPING
CAN CAUSE SEVERE
INJURY
.
Trip
Latch Clearance
Refer
to
Fig
.
5
.
With
the
breaker
in
the
tripped
position
and
the
closing springs
charged
,
check
the
clearance
between
the
trip
latch
(
8
)
and
the
trip
roller
(
9
)
.
It
should
measure
1
/
32
”
to
l
/
l
6
"
.
Prop
Clearance
Refer
to
Fig
.
5
*
With
the
breaker
closed
as
far
as
possible
,
that
is
,
with
the
springs
blocked
and
the
cam
(
l
6
)
rotated
so
that
the
prop
pin
(
13
)
is
at
its
maximum
height
over
the
prop
(
14
)
,
the
clearance
between
the
prop
and
prop
pin
should be
l
/
l
6
”
to
5
/
32
”
.
No
adjustment
is
pro
-
vided
and
a
visual
inspection
is
usually
all
that
is
required
.
Release
Latch
Wipe
Refer
to
Fig
.
6
.
The
wipe
between
the
release
latch
(
3
)
and
roller
(
2
)
should
be
3
/
l
6
"
to
1
/
4
”
.
If
re
-
setting
is
required
,
loosen
,
set
,
and
re
-
tighten
adjustment
nut
and
screw
(
4
)
.
Release
Latch
Monitoring
Switch
The
release
latch
must
be
fully
re
-
set
and
the
monitoring
switch
opera
-
ted before
the
motor
will
start
.
The
switch
should
be
wiped
by
the
striker
so
that
the
clearance
between the striker
and
switch
mounting
bracket
(
2
G
)
Fig
.
6
is
1
/
32
”
or
less
.
To
obtain
this
adjustment
bend
the
switch
striker
.
Be
sure
the
latch
is
fully
re
-
set
before
making
any
adjustments
.
Motor
and
Relay
Switches
fl
)
Fig
.
6
until
has traveled
the
maximum
amount
(
about
180
de
-
and
rotate
switch
and
support
(
15
)
is
With the
closing
springs
blocked
rotate
the
switch
cam
the
switch
striker
(
8
)
grees
rotation
of
cam
)
.
(
14
)
(
8
)
Loosen
mounting
bolt
support
(
15
)
until the
gap
between the
striker
1
/
32
”
or
less
.
'
T
-
i
-
8
Courtesy of NationalSwitchgear.com