GE AM-4.16-250-6C User manual

GEI
-
88761
E
INSTRUCTIONS
SUPERSEDES
GEU
88761
D
AND
RENEWAL
PARTS
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4
PM
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MAGHE
-
BLAST
CIRCUIT
BREAKER
TYPES
AM
-
4.16
-
250
-
6
C
AM
-
4.16
-
250
-
6
H
AM
-
4.16
-
250
-
7
c
AM
-
4.16
-
250
-
7
H
;
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CONTENTS
1
t
-
i
.
-
*
Introduction
1
•
•
•
N
-
>
?
'
Receiving
,
Handling
and
Storage
-
V
1
Installation
2
-
?
•
Description
of
Operation
4
Adjustments
General
Maintenance
12
©
•••
•
••
•
•
•
•
28
Renewal
Parts
%
f
t
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I
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&
;
SWITCHGEAR
DEPARTMENT
i
$
GENERAL
^
)
ELECTRIC
PHILADELPHIA
.
PA
.
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*
>
%
{
*
Courtesy of NationalSwitchgear.com

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Courtesy of NationalSwitchgear.com

I
GEI
-
88761
1
1
3
MAGNE
-
BLAST
CIRCUIT
BREAKER
S
AM
-
4.16
-
250
-
6
AM
-
4.16
-
250
-
7
A
Letter
Designation
-
B
,
C
,
and
H
,
used
immediately
following
the
model
number
xndicates
basic
design
features
.
ft
3
i
;
1
INTRODUCTION
1
Vmagne
-
blast
circuit
breaker
is
the
removable
interrupting
element
f
\
use
in
vertical
-
lift
metal
-
clad
switchgear
,
to
provide
reliable
co
\
ol
and
protection
of
power
systems
.
Among
the
many
advantages
of
met
^
clad
switchgear
are
added
protection
to
equipment
and
personnel
,
com
^
fcness
,
simplified
installation
and
reduced
maintenance
.
In
keep
-
ing
i
h
these
features
the
magne
-
blast
breakers
are
designed
for
in
-
terclri
geability
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
mainten
-
w
ance
and
long
life
.
t
"
—
1
The
AM
-
4.16
magne
-
blast
breaker
is
available
in
a
number
of
current
ratings
.
Refer
to
the
breaker
nameplate
for
the
complete
rating
in
-
formation
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
o
>
given
on
the
nameplate
.
Since
this
book
is
written
to
cover
several
o
ratings
of
breakers
that
are
of
the
same
general
design
,
all
instruc
-
0
tions
will
be
of
a
general
character
and
all
illustrations
will
be
typical
,
unless
otherwise
specifie
m
VI
«
PROPER
INSTALLATION
AND
MAINTENANCE
ARE
NECESSARY
TO
INSURE
CONTINUED
SATISFACTORY
OPERATION
OF
THE
BREAKER
.
The
following
instructions
will
provide
complete
information
for
placing
the
magne
-
blast
breaker
in
service
and
for
maintaining
satisfactory
operation
.
RECEIVING
,
HANDLING
-
AND
STORAGE
M
Receiving
and
Handling
Each
breaker
is
carefully
inspected
and
packed
by
workmen
experienced
in
the
proper
handling
and
packing
of
electrical
equipment
,
diately
upon
receipt
of
the
circuit
breaker
,
an
examination
should
be
Imme
-
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
to
provide
for
every
possible
contingency
to
be
met
Should
in
connection
with
installation
,
operation
or
maintenance
,
further
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
.
'
i
!
j
1
Courtesy of NationalSwitchgear.com

GEI
-
88761
If
injury
or
rough
handling
made
for
any
damage
sustained
in
transit
,
is
evident
,
a
damage
claim
should
be
filed
immediately
with
the
trans
-
portation
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
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
.
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
,
preferably
by
storing
it
in
a
warm
dry
room
,
since
water
absorption
has
an
adverse
effect
on
the
insulation
parts
.
Circuit
breakers
for
outdoor
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
corro
-
sive
gases
or
fumes
;
particular
care
should
be
taken
to
protect
the
equipment
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
5
should
be
coated
•
;
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
14
)
Charge
the
breaker
closing
springs
manually
using
a
5
/
8
"
ratchet
wrench
to
turn
the
driving
eccentric
(
6
)
Fig
.
(
4
)
.
Turning
the
eccentric
counter
clockwise
will
advance
the
ratcher
wheel
and
compress
tne
springs
.
When
the
springs
have
reached
the
fully
charged
position
the
indi
-
cator
(
3
D
)
Fig
.
(
4
)
will
read
"
CHARGED
"
,
and
the
driving
pawl
will
be
raised
from
the
ratchet
wheel
teeth
.
Additional
turning
of
the
eccentric
will
not
advance
the
ratchet
wheel
.
1
.
1
2
.
i
.
)
2
$
Courtesy of NationalSwitchgear.com

GEI
-
88761
Insert
the
spring
blocking
device
(
4
)
Fig
.
(
4
)
and
manually
dis
-
charge
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
,
and
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
:
i
Primary
contact
wipe
Arcing
contact
wipe
Primary
contact
gap
Refer
to
page
7
Refer
to
page
7
Refer
to
page
7
"
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
PRECAUTION IS
REQUIRED
TO
PREVENT
ACCIDENTAL
CLOSING
OR
TRIPPING
.
"
a
.
b
.
c
.
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
.
*
S
&
4
3
.
Attach
test
coupler
to
circuit
breaker
and
operate
electrically
several
times
.
TROL POWER
CHECK
"
.
Check
the
control
voltage
as
described
under
"
CON
-
H
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
.
Remove
the
test
coupler
and
replace
box
barrier
.
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
(
page
13
)
.
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
.
4
.
1
«
s
»
3
Courtesy of NationalSwitchgear.com

f
;
GEI
-
88761
DESCRIPTION
OF
OPERATION
The
inagne
-
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
.
i
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
(
1
)
Fig
.
(
1
)
.
!
j
A
positive
interlock
(
2
)
Fig
.
(
3
)
and
interlock
switch
(
2
)
Fig
.
(
l
)
are
provided
between
the
breaker
and
metal
-
clad
unit
to
prevent
rais
-
ing
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
.
When
the
breaker
is
interchangeable
with
MS
-
13
solenoid
operated
breakers
in
M
-
26
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
.
>
m
In
case
when
breakers
with
ML
-
13
operating
mechanisms
must
match
and
line
up
with
breakers
having
ML
-
11
mechanisms
the
spring
charg
-
ing
circuit
should
be
fused
with
Buss
Company
Fusetrons
as
follows
Control
Voltage
Fuse
Size
Cat
.
No
.
48
v
-
d
-
c
llOv
125
v
-
d
-
c
115
v
-
a
-
c
220
v
-
d
-
c
250
v
-
d
-
c
230
v
-
a
-
c
10
A
FRN
10
FRN
4
FRN
4
FRN
4
FRN
2.5
FRN
2.5
FRN
2.5
4
A
d
-
c
4
A
4
A
\
2.5
A
2.5
A
2.5
A
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
)
.
5
f
3
*
3
I
4
3
Courtesy of NationalSwitchgear.com

GEI
-
88761
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
180
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
.
(
l
)
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
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
restored
without
warning
.
In
this
event
,
the
motor
drive
/
will
take
over
again
and continues
to
charge
the
springs
.
Ill
Closing Operation
m
*
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
(
ll
)
Fig
.
(
6
)
on
the
closing
latch
will
start
the
spring charging
motor
after
it
is
fully
reset
.
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
.
By
energizing
the
trip
coil
,
the
trip
plunger
rotates
the
trip
latch
(
j
)
,
Fig
.
(
5
)
J
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
.
i
II
sm
0
\
5
.
Courtesy of NationalSwitchgear.com

T
-
rvj
.
1
/
I
i
I
i
GEI
-
88761
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
Pig
.
(
7
)
.
As
the
movable
arcing
contact
(
27
)
is
withdrawn
through
the
slot
or
between
the
arcing
probes
on
the
arc
runner
,
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
(
28
)
and
forces
the
arc
onto
the
lower
arc
runner
(
10
)
.
Establish
-
ment
of
the
arc
on
the
runners
automatically
inserts
the
blowout
coils
into
the
circuit
,
introducing
a
magnetic
field
between
the
pole
pieces
which
tends
to
draw
the
arc
away
from
the
arcing
contacts
.
The
inter
-
rupter
contains
one
upper
magnetic
blowout
coil
and
one
lower
blowout
coil
each
individually
connected
in
series
with
its
respective
arc
run
-
ner
.
The
arc
is
forced
outward
along
the
diverging
arc
runners
by
the
magnetic
field
.
At
the
same
time
,
the
arc
is
being
forced
into
the
arc
chute
(
8
)
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
ser
-
pentine
path
,
so
that
the
electrical
resistance
in
the
path
of
the
arc
is
rapidly
increased
and
the
heat
from
the
arc
is
absorbed
.
The
in
-
creased
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
produced
by
the
arc
so
cooled
that
the
arc
cannot
reestablish
itself
,
and
interruption
occurs
.
*
Manual
tripping
follows
the
same
procedure
except
that
instead
of
energizing
the
trip
circuit
,
the
manual
trip
(
ll
)
,
Fig
.
(
2
)
is
used
.
•
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
re
-
open
.
The
closing
cam
(
l
6
)
will
complete
its
closing
stroke
and
the
springs
will
re
-
charge
as
in
a
normal
closing
operation
.
1
:
!
;
S
i
V
I
i
&
I
.
'
8
s
:
i
1
;
s
m
;
V
1
1
ADJUSTMENTS
All
adjustments
should
be
checked
during
periodic
inspections
and
whenever
it
becomes
necessary
to
repair
or
replace
parts
that
have
be
-
come
worn
or
defective
while
in
service
.
The
following
adjustments
are
listed
in
the
order
in
which
they
are
to
be
checked
.
First
,
how
-
ever
,
remove
the
breaker
from
the
metal
-
clad
unit
and
remove
the
box
barriers
and
front
cover
.
i
$
$
x
i
vi
"
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
ACCI
-
DENTAL
CLOSING
OR
TRIPPING
.
"
i
$
3
a
ft
%
m
%
6
4
Courtesy of NationalSwitchgear.com

GEI
-
88761
5
Primary
Contact
Wipe
When
the
breaker
is
closed
,
as
shown
in
Fig
.
(
8
)
,
the
stationary pri
-
mary
contacts
(
.
1
)
should
rise
5
/
16
"
-
f
-
0
—
l
/
l
6
.
Before
checking
this
dimension
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
adjust
-
ment
,
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
and
the buffer
block
should
be
l
/
l
6
"
or
greater
(
as
)
when
the
breaker
is
fully
closed
.
m
1
!
contact
arm
shown
in
Fig
B
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
indication
that
the
arcing
contacts
need
to
be
replaced
.
When
making
this
check
,
also
see
that
the
movable
arcing
contact
(
5
)
passes
between
the
slots
or
the
arcing probes
on
the
upper
arc
runner
with
-
out
touching
,
whichever
is
applicable
.
Primary
Contact
Gap
IP
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
3
-
13
/
16
"
+
1
/
8
"
—
3
/
16
"
.
To
change
this
gap
,
loosen
the
check
nut
(
17
)
*
Fig
*
(
5
)
(
18
)
on
stud
(
19
)
.
Screwing
the
adjusting
and
turn
the
adjusting
nut
nut
down
will
decrease
the
primary
contact
gap
.
Tighten
the
check
nut
and
remeasure
the
contact
gap
(
close
and
trip
the
breaker
before
check
-
ing
the
measurement
)
.
Trip
Latch
Wipe
Refer
to
Fig
.
(
5
)
*
The
wipe
of
the
trip
latch
(
8
)
on
the
trip
roller
(
9
)
should
be
from
3
/
l
6
"
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
vis
-
ual
inspection
is
usually
all
that
is
required
.
If
this
setting
is
not
correct
,
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
.
!
isi
7
s
Courtesy of NationalSwitchgear.com

GEI
-
88761
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
)
(
9
)
.
It
should
measure
1
/
32
"
to
l
/
l
6
"
.
and
the
trip
roller
Prop
Clearance
Refer
to
Fig
.
(
5
)
.
With
the
breaker
closed
as
far
as
possible
,
that
is
,
with
the
springs
blocked
and
the
cam
(
16
)
rotated
so
that
the
prop
pin
(
13
)
is
at
its
maximum
height
over
the
prop
(
l
4
K
tween
the
prop
and
prop
pin
should
be
l
/
l
6
"
to
5
/
32
.
No
adjustment
is
provided
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
/
16
"
to
1
/
4
"
.
If
re
-
setting
is
required
,
loosen
,
set
,
and
re
-
tighten
adjustment
nut
and
screw
(
4
)
.
Release
Latch
Monitoring
Switch
the
clearance
be
-
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
/
32
"
or
less
.
To
obtain
this
adjustment
bend
the
switch
striker
.
Be
s
re
the
latch
is
fully
re
-
set
before
making
any
adjustments
.
Motor
and
Relay
Switches
g
.
(
6
)
(
about
and
rotate
and
support
With
the
closing
springs
blocked
rotate
the
switch
cam
(
l
)
Fi
until
the
switch
striker
(
8
}
has
traveled
the
maximum
amount
180
degrees
rotation
of
cam
)
.
Loosen
mounting
bolt
(
14
)
switch
support
(
15
)
until
the
gap
between
the
striker
(
8
)
(
15
)
is
1
/
32
"
or
less
.
Interlock
Switch
Wipe
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
sucn
as
a
light
indicator
or
bell
set
.
To
obtain
adjustment
on
the
interlock
(
3
)
,
bend
the
interlock
switch
arm
(
2
)
until
there
is
a
maximum
of
1
/
32
"
clearance
to
the
switch
mounting
plate
(
4
)
.
SI
I
3
switch
I
,
r
£
Auxiliary
Switch
§
The
auxiliary
switch
(
9
)
,
Fig
.
(
ll
)
Is
mounted
on
the
left
side
of
the
operating
mechanism
.
The
shaft
of
the
position
indicator
(
8
)
operates
the
auxiliary
switch
shaft
which
opens
and
closes
‘
the
"
a
"
and
"
b
"
con
-
tacts
.
The
"
a
"
contacts
are
open
when
the
breaker
is
open
and
the
"
b
"
contacts
are
open
when
the
breaker
is
closed
.
The
"
a
"
contacts
should
close
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
.
I
%
%
I
1
i
*
3
n
n
.
8
I
I
Courtesy of NationalSwitchgear.com