GE Magne-Blast AM-13.8-1000-3H User manual

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GEI
-
88766
INSTRUCTIONS
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Receiving
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Handling
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Storage
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Installation
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Description
of
Operation
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Adjustments
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12
General
Maintenance
31
Renewal
Parts
-
SWITCHGEAR
lEPliTiill
GENERAL
!
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Courtesy of NationalSwitchgear.com

OKI
-
88766
*
<
v
«
MAGNE
-
BLAST
CIRCUIT
BREAKER
AM
-
13.8
-
1000
-
3
(
A
)
A
Letter
Designation
B
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
keeping
with
these
features
the
magne
-
blast
breakers
are
designed
for
interchangeability
and
maneuverability
,
together
with
reliability
and
low
maintenance
require
-
ments
.
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
material
.
A
sturdy
,
reliable
operating
mechanism
assures
low
maintenance
and
long
life
.
The
AM
-
13.8
magne
-
blast
breaker
is
available
in
a
number
of
current
ratings
.
Refer
to
the
breaker
nameplate
for
the
complete
rating
information
of
any
particular
breaker
.
The
short
circuit
conditions
to
be
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
.
Sv
,
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
service
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
,
information
be
desired
or
should
particular
problems
arise
which
are
not
covered
sufficiently
for
the
purchaser
’
s
purposes
,
the
matter
should
be
referred
to
the
General
Electric
Company
.
Should
further
1
Courtesy of NationalSwitchgear.com

GE
1
-
88766
RECEIVING
.
HANDLING
,
AMD
STORAGE
©
Receiving
and
Handling
Each
breaker
is
carefully
inspected
,
and
packed
by
workmen
experienced
in
the
proper
handling
and
packing
of
electrical
equipment
.
Immediately
upon
receipt
of
the
circuit
breaker
*
an
examination
should
be
made
for
any
damage
sustained
in
transit
.
If
4
-
njury
or
rough
handling
is
evident
*
a
damage
claim
should
be
filed
Immediately
with
the
transportation
com
-
pany
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
careless
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
.
m
The
arc
chutes
for
this
breaker
are
packaged
separately
,
removing
the
arc
chutes
from
their
containers
*
inspect
them
completely
for
damage
before
installation
on
the
breaker
.
After
carefully
Storage
It
is
recommended
that
the
breaker
be
put
into
service
immediately
in
its
permanent
location
.
If
this
is
not
possible
*
the
following
precau
-
tions
must
be
taken
to
insure
the
proper
storage
of
the
breakers
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
raetal
-
clad
switchgear
should
be
stored
In
the
equipment
only
when
power
is
available
and
the
heaters
are
in
operation
to
prevent
conden
-
sation
.
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
foe
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
.
should
be
coated
9
$
M
:
.
k
m
#
2
Courtesy of NationalSwitchgear.com

GEI
~
88766
INSTALLATION
X
.
Remove
the
rear
barrier
,
side
barriers
,
interphase
barriers
,
and
the
front
cover
and
make
a
visual
inspection
to
ascertain
that the
breaker
and
mechanism
,
is
in
satisfactory
condition
.
Check
all
bearing
sur
-
faces
of the
mechanism
for
lubrication
.
Refer
to
section
on
LUBRICA
-
TION
(
page
15
)
.
2
.
The
arc
chutes
can
be
assembled
on
the
breaker
at
this time
.
The
arc
chutes
should
be
lifted
only by
the
use
of
hooks
in
the
lifting
holes
provided
in
the
top
of
the
arc
chute
brace
.
Refer
to
ARC
CHUTE
RE
-
MOVAL
(
page
14
}
.
Before
checking
the
breaker for
electrical
opera
-
tion
be
certain
the
upper
mounting
bolts
(
used
as an
electrical
and
mechanical connection
)
and
the
lower
electrical
connection
to
the
arc
chute
is
tight
.
3
.
Charge
the breaker
closing
springs
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
.
the
spring
(
10
)
Fig
.
4
When
tor
raised
from
the
ratchet
wheel teeth
.
Additional
turning
of
the
eccen
-
tric
will
not
advance
the
ratchet
wheel
.
s
have
reached the
fully charged
position
the
indica
-
will
read
"
CHARGED
1
'
,
and
the
driving
pawl
will
be
Insert
the
spring
blocking
device
(
4
)
Fig
.
4
and
manually
discharge
the
springs
against
the
pins
by
pushing
the
manual
release
button
(
l
)
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
larches
se
-
curely
in
the
closed
position
,
and that
it
trips
freely
when
the
man
-
ual
trip
lever
is
operated
.
The breaker should
not
be
operated
elec
-
trically
until it
has
been
operated
several
times
manually
to
insure
freedom
of
action
.
At
this
time
,
also
check
the
following
adjustments
2
a
.
Primary
contact
wipe
b
.
Arcing
contact
wipe
c
.
Primary
contact
gap
Refer
to
page
7
Refer
to
page
J
Refer
to
page
J
"
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 BLOC ICED
.
THIS PRECAUTION
IS
REQUIRED
TO
PREVENT
ACCIDENTAL
CLOSING
OR
TRIPPING
/
'
After
the
adjustments
have been
checked
,
the
springs
cart
be
unblocked
.
Rotate
the
driving
eccentric
until
the
indicator
reads
’
'
CHARGED
9
'
and
the ratchet wheel
no
longer
is
advanced
.
The
blocking
device
can
now
be
removed
.
3
Courtesy of NationalSwitchgear.com

GEI
~
88766
4
,
Attach
test
coupler
to
circuit
breaker
and
operate
electrically
sev
-
eral
times
,
POWER
CHECK
51
.
I
Check
the
control
voltage
as
described
under
^
CONTROL
If
the
breaker
secondary
wiring
is
to
be
given
a
.
h
±
~
potential
NOTE
s
test
at
1500
volts
,
remove
both
the
motor
leads
from
the
terminal
connection
,
cause
damage
to
the
winding
insulation
.
Failure
to
disconnect
the
motor
from
the
circuit
may
5
.
Remove
the
test
coupler
and
replace
the
rear
,
side
,
and
inferpha
.
se
barriers
.
6
.
If
the
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
(
page
15
)
.
7
.
Lubricate
the
silver
portion
of
the
primary
disconnect
studs
by
rub
-
bing
a
small
amount
of
contact
lubricant
D
50
H
47
to
form
a
thin
coat
-
ing
on
the
ball
contact
.
8
.
Refer
to
metal
-
clad
instruction
book
GEH
-
1802
for
final
instructions
before
inserting
the
breaker
into
the
metal
-
clad
unit
.
DESCRIPTION
OF
OPERATION
The
magne
-
blast
breaker
is
composed
of
two
major
parts
,
the
breaker
ele
-
ment
and
the
operating
mechanism
.
The
breaker
element
comprises
three
similar
pole
units
,
each
pole
unit
consisting
of
main
and
arcing
'
con
-
tacts
,
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
.
n
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
oh
a
-
c
or
d
-
c
voltage
as
indicated
on
the
breaker
nameplate
.
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
(
1
)
Fig
.
1
.
A
positive
interlock
(
2
)
Fig
.
-
3
and
interlock
switch
(
2
)
Fig
.
1
are
pro
-
vided
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
.
i
If
4
Courtesy of NationalSwitchgear.com

GEI
-
88766
Spring
Charging
«
r
The
mechanism
consists
of
a
high
speed
gear
motor
that
compresses
a
set
of
closing
springs
through
the
action
of
a
simple
eccentric
*
ratchet
*
and
pawl
assembly
.
The
rotary
action
of
the
motor
(
2
)
Fig
.
4
is
con
-
verted
to
a
short
straight
stroke
pumping
action
through
the
eccentric
(
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
)
ratchet
wheel
has
been
rotated
approximately
l
80
degrees
the
closing
springs
(
6
)
will
be
fully
compressed
.
As
the
ratchet
wheel
continues
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
(
ll
)
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
switch
-
es
(
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
,
o
locks
the
closing
power
circuits
open
and
the
relay
will
remain
energized
un
-
til
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
p
/
8
'
f
ratcnet
wrench
can
be
used
to
rotate
tne
eccentric
in
a
counter
clockwise
direction
until
the
indicator
reads
’
’
CHARGED
1
'
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
restored
without
warning
.
In
this
event
*
the
motor
drive
will
take
over
again
and
continues
to
charge
the
springs
.
When
the
m
W
Closing
Operation
Closing
the
breaker
Is
accomplished
by
energizing
the
closing
solenoid
or
by
manually
pressing
the
close
button
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
(
l
6
)
Fig
.
5
that
closes
the
breaker
through
a
simple
linkage
that
remains
trip
free
at
all
times
.
A
monitoring
switch
(
ll
)
Fig
.
6
on
the
closing
latch
will
start
the
spring
charging
motor
after
it
is
fully
reset
.
In
either
case
*
the
closing
mm
Ip
Opening
Operation
An
electrical
opening
operation
is
initiated
by
energising
the
trip
coil
.
This
is
accomplished
either
by
actuating
the
opening
cohtrol
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
.
By
energizing
the
trip
coil
*
the
trip
plunger
rotates
the
trip
latch
{
7
)
s
Fig
.
5
caus
-
ing
the
operating
mechanism
,
linkage
to
collapse
The
energy
stored
in
m
D
Courtesy of NationalSwitchgear.com

GEI
-
88766
in
the
opening
springs
is
thus
released
,
,
opening
the
breaker
.
During
this
operation
*
the
trip
coil
circuit
is
deenergized
*
and
upon
comple
-
tion
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
current
through
the
arcing
contacts
.
An
arc
forms
as
the
arcing
contacts
part
See
Fig
.
7
.
As
the
movable
arcing
nontact
(
7
)
is
moved
away
from
,
the
stationary
contact
*
the
upper
end
of
the
arc
is
transferred
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
)
tically
inserts
the
blowout
coils
into
the
circuit
*
introducing
a
mag
-
netic
field
between
the
pole
pieces
which
tends
to
draw
the
arc
away
from
the
arcing
contacts
coils
and
three
lower
blowout
coils
each
individually
connected
in
ser
-
ies
with
its
respective
section
of
arc
runner
.
As
the
arc
is
forced
outward
along
the
diverging
arc
runners
*
the
magnetic
field
is
progress
-
ively
increased
with
the
addition
of
each
coil
in
the
circuit
.
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
arc
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
resistance
reduces
both
the
magnitude
and
the
phase
angle
of
the
current
*
|
g
and
at
an
easily
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
(
ll
)
Fig
.
2
is
used
.
i
Establishment
of
the
arc
on
the
runners
automa
-
The
interrupter
contains
three
upper
blowout
The
increased
Trip
Free
Operation
If
the
trip
coil
circuit
is
energized
while
the
breaker
is
closing
,
the
trip
plunger
will
force
the
trip
latch
(
8
)
Fig
.
5
away
from
the
trip
roller
(
9
)
causing
the
mechanism
linkage
to
collapse
and
the
breaker
to
The
closing
cam
(
16
)
will
complete
its
closing
stroke
and
the
re
-
open
springs
will
re
-
charge
as
in
a
normal
closing
operation
.
i
ADJUSTMENTS
All
adjustments
should
be
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
list
-
ed
in
the
order
in
which
they
are
to
be
checked
.
First
*
however
*
remove
the
breaker
from
the
metal
-
clad
unit
and
remove
the
rear
*
side
*
and
in
-
terphase
barriers
and
front
cover
.
m
£
o
Courtesy of NationalSwitchgear.com

GEE
-
88766
"
DO
NOT WORK
ON
EITHER
THE
BREAKER
OR
MECHANISM UNLESS
THE
CLOSING
SPRINGS
fftiARE
BLOCKED
AND
THE
OPENING
SPRINGS
HAVE
BEEN
TRIPPED
OPEN OR
MECHANICALLY
'
BLOCKED
,
THIS
MEASURE
IS
REQUIRED
TO
PREVENT
ACCIDENTAL
CLOSING OR
TRIP
-
PING
.
"
Primary
Contact
Wipe
When the
breaker
is
closed
*
as
shown
in
Fig
.
8
,
,
the
stationary
primary
contacts
(
l
)
should
rise
5
/
16
”
4
»
0
—
l
/
l
6
"
on
the
1200
A
,
breaker
and
1
/
4
'
V
0
“
l
/
l
6
ff
on
3000
A
breakers
, ,
Before
checking
this
dimension
be
sure
the
mechanism is
re
-
set
so
that
the
prop
pin
(
13
)
Fig
.
5
is
resting
p
on
the
prop
.
To
obtain
the
proper
contact
adjustment
*
open
the
breaker
wand
,
referring
to
Pig
.
9
>
loosen the check
nut
(
4
)
and
turn
the
adjusting
nut
(
3
)
.
Screwing
up
on
the
adjusting
nut
will
decrease the
primary
con
-
tact
wipe
,
down
will
increase
it
.
Tighten
the
check
nut
*
close
the
break
-
er
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
,
s
or
greater
(
as
shown
in
Fig
.
8
)
when the
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
(
1
)
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
Vindication
that the
arcing
contacts
need
to
be
replaced
.
When
making
this
check
*
also
see
that the
movable
arcing
contact
(
5
)
passes
between
the
sides
of
the
arc
chute
throat
without
touching
.
Primary
Contact
Gap
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
(
5
)
and
the
movable
primary
contact
(
6
)
should be
5
-
1
/
45
/
1611
-
1
/
8
"
for
the
1200
A
breaker and
5
-
13
/
16
"
4
=
5
/
16
"
-
1
/
8
"
for the
3000
A
breaker
,
change
this
gap
*
loosen
the
check
nut
(
17
)
*
Fig
.
5
and
turn
the
adjust
-
ing
nut
(
18
)
on
stud
(
19
)
«
Screwing
the
adjusting
nut
down
will
decrease
the
primary
contact
gap
.
Tighten
the check
nut
and
re
-
measure
the
con
-
jjjjg
,
tact
gap
(
close and
trip
the
breaker before
checking
the
measurement
)
.
Trip
Latch
Wipe
TO
Refer
to
Fig
.
5
.
The
wipe
of the
trip
latch
(
8
)
on
the
trip
roller
(
9
)
should
be from
3
/
16
"
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
Inspection
is
usually
all that
is
required
.
If
this
setting
is
not
correct
*
look
for
insufficient
travel
of the
trip
shaft
(
7
)
.
ft
7
Courtesy of NationalSwitchgear.com

GEI
-
38766
WHEN
WORKING
ON
THE
MECHANISM
IN
THE
CLOSED
POSITION
,
KEEP
FINGERS
CLEAR
OF
THE
LINKAGE
,
AS
ACCIDENTAL
TRIPPING
CAN
CAUSE
SEVERE
INJURY
„
0
kr
Trip
Latch
Clearance
Refer
to
Fig
.
5
„
With
the
breaker
in
the
tripped
position
and
the
clos
-
ing
springs
charged
,
check
the
clearance
between
the
trip
latch
(
8
)
and
the
trip
roller
(
9
)
.
It
should
measure
l
/
32
u
to
1
/
16
’
*
„
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
(
l
4
)
,
the
clearance
between
the
prop
and
prop
pin
should
be
1
/
16
"
to
3
/
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
/
lor
"
to
1
/
4
”
,
If
re
-
setting
is
required
,
loosen
,
set
,
and
re
-
tighten
adjustment
nut
and
screw
(
4
)
.
Release
Latch
Monitoring
Switch
Hi
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
(
20
)
Fig
,
6
is
1
/
321
'
or
less
.
To
obtain
this
adjustment
bend
the
switch
striker
.
Be
sure
the
latch
is
fully
re
-
set
before
making
any
adjustments
.
i
/
*
•
m
Motor
and
Relay
Switches
1
)
Fig
.
6
until
has
traveled
the
maximum
amount
(
about
180
de
-
and
rotate
switch
With
the
closing
springs
blocked
rotate
the
switch
cam
the
switch
striker
grees
rotation
of
cam
)
.
Loosen
mounting
bolt
support
(
15
)
until
the
gap
between
the
striker
(
8
)
and
support
(
15
)
is
/
32
”
or
less
.
1
Interlock
Switch
Wipe
m
Refer
to
Fig
.
10
.
Rotate
the
interlock
shaft
(
l
)
manually
clockwise
to
release
the
interlock
switch
arm
(
2
)
.
The
point
at
which
the
con
?
tacts
make
can
be
determined
with
a
circuit
continuity
tester
such
as
a
light
indicator
or
bell
set
.
To
obtain
adjustment
on
the
interlock
switch
(
3
)
5
bend
the
interlock
switch
arm
(
2
)
until
there
is
a
maximum
of
I
/
32
"
clearance
to
the
switch
mounting
plate
(
4
)
.
8
Courtesy of NationalSwitchgear.com

GHX
~
88766
^
Auxiliary
Switch
The
auxiliary
switch
Fig
*
11
is
mounted
on
the
left
side
of
the
operating
mechanism
.
The
shaft
of
the
position
indicator
(
8
)
operates
tllg
dtlM
-
liary
switch
shaft
which
opens
and
closes
the
!
ia
,
!
and
!
'
b
”
con
-
tacts
.
The
ffah
contacts
are
open
when
the
breaker
is
open
and
the
iab
!
'
contacts
are
open
when
the
breaker
is
closed
„
The
t
8
at
!
contacts
should
0
To
fee
when
the
breaker
primary
contact
gap
is
a
minimum
,
of
1
!
:
.
The
"
b
,
!
contacts
need
only
to
be
checked
to
see
that
they
are
open
when
the
breaker
is
closed
.
No
adjustment
is
provided
and
a
visual
inspection
is
usually
all
that
is
required
.
%
Driving
Pawl
Adjustment
The
driving
pawl
(
5
)
Fig
.
4
must
advance
the
ratchet
wheel
(
3
)
Fig
.
3
sufficiently
on
each
stroke
to
allow
the
latching
pawls
(
l
)
to
fall
into
the
ratchet
teeth
.
This
should
be
checked
with
the
maximum
closing
spring
load
against
the
driving
members
.
With
the
mechanism
unblocked
,
hand
charge
the
closing
springs
with
the
manual
charging
wrench
until
they
are
slightly
more
than
half
charged
.
Slowly
rotate
the
'
charging
wrench
until
the
driving
pawl
(
5
)
Fig
.
4
has
traveled
through
its
return
stroke
and
check
the
maximum
clearance
between
the
pawl
and
the
ratchet
tooth
.
Rotate
the
charging
wrench
until
the
driving
pawl
has
advanced
the
ratchet
tooth
to
its
maximum
travel
.
Now
check
the
clearance
between
the
ratchet
tooth
and
the
latching
pawl
(
1
)
Fig
.
3
.
The
clearance
should
^
be
approximately
equal
for
both
the
driving
and
latching
pawls
and
not
less
than
*
015
,
?
in
either
case
.
If
adjustment
is
required
for
either
pawl
the
springs
must
first
he
fully
charged
and
blocked
.
Loosen
seven
motor
support
bolts
(
l
)
Fig
.
15
and
move
entire
motor
assembly
to
the
rear
if
the
clearance
is
under
the
minimum
,
at
the
latching
pawls
,
and
to
the
front
if
the
clearance
is
un
-
der
the
minimum
,
at
the
driving
pawl
.
Move
the
motor
assembly
approxi
-
mately
twice
the
dimensional
Increase
required
at
the
pawl
.
Be
certain
the
motor
assembly
is
moved
straight
forward
or
rearward
and
tighten
the
one
bolt
on
the
right
side
of
the
mounting
frame
first
to
assure
proper
alignment
.
After
tightening
the
remaining
bolts
the
springs
should
foe
released
and
the
clearance
again
checked
as
described
above
.
AUXILIARY
DEVICES
I
&
W
Latch
Checking
Switch
Refer
to
Fig
.
12
,
Rotate
the
trip
latch
(
4
)
clockwise
(
looking
at
the
left
side
of
the
mechanism
)
by
pressing
the
manual
trip
lever
to
open
the
latch
checking
switch
operating
am
(
3
)
.
Allow
the
trip
latch
to
reset
slowly
and
determine
the
point
at
which
the
contacts
make
by
using
a
circuit
continuity
tester
,
such
as
a
light
indicator
or
bell
set
9
The
contacts
of
the
latch
checking
switch
should
just
make
when
the
gap
be
-
tween
the
trip
latch
(
4
)
and
the
stop
pin
(
5
)
located
on
the
crank
(
?
)
is
l
/
l
6
”
.
There
should
be
a
minimum
of
l
/
b
4
S
!
between
the
operating
arm
|
(
3
)
Fig
.
12
and
the
switch
support
(
l
)
.
To
obtain
adjustment
of
the
latch
checking
switch
(
2
)
bend
the
latch
checking
switch
operating
arm
(
3
)
o
9
Courtesy of NationalSwitchgear.com