GE AM-2.4/4.16-100/150- 3 User manual

GEH
-
2000
B
INSTRUCTIONS
AND
RENEWAL
PARTS
(
SUP
ERSEDE
9
SEH
-
2000
A
)
v
.
s
Types
AM
-
2.4
/
4.16
-
100
/
150
-
3
AM
-
2.4
/
4.16
-
100
/
150
A
-
3
AM
-
2.4
/
4.16
-
150
/
250
-
3
AM
-
2.4
/
4.16
-
150
/
250
A
-
3
IVlth
MS
-
13
Mechanism
eOECTSHTS
3
INTRODUCTION
RECEIVING
,
HANDLING
AND
STORAGE
3
.
. .
3
DESCRIPTION
. . .
4
INSTALLATION
.
..
.
.
9
OPERATION
.
.
11
MAINTENANCE
..
..
•
•
..
18
RENEWAL
PARTS
.
.
.
• •
MEDIUM
VOLTAGE SWITCHGEAR
DEPARTMENT
wm
L
GENERAL
PHILADELPHIA
,
P A
.
Courtesy of NationalSwitchgear.com

%
GEH
-
2000
Circuit
Breaker
Type
AM
T
1
*
A
1
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4
in
CM
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CM
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CO
W
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cn
u
_
LJCGT
;
1
.
Secondary
Coupler
J
2
.
Auxiliary
Switch
3
.
Position
Indicator
4
.
Opening
Spring
Unit
5
.
Operation
Counter
6
.
Manual
Trip
'
#
7
.
Control
Device
8
.
Control
Device
Plunger
Guide
9
.
Closing
Solenoid
10
.
Plunger
Interlock
(
Optional
)
:
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Fig
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I
MS
-
13
Operating
Mechanise
wrmw
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-
;
^
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CM
CM
if
§
4
®
>
3
3
.
Handle
4
.
Release
Valve
1
.
Closing
Armature
2
.
Maintenance
Operating
Device
Method
of
Mounting
Maintenance
Operating
Device
Fig
.
2
2
Courtesy of NationalSwitchgear.com

MAGNE
-
BLAST
CIRCUIT
BREAKER
TYPE
AM
-
2.4
/
4.16
WITH
MS
-
13
MECHANISM
c
INTRODUCTION
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
in
-
timate
contact
with
cool
dielectric
mater
-
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
gen
-
eral
character
and
all
illustrations
will
be
typical
,
unless
otherwise
specified
.
The
Magne
-
blast
Circuit
Breaker
is
the
removable
interrupting
element
for
use
in
vertical
-
lift
metal
-
clad
switchgear
,
to
pro
-
vide
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
mainte
-
nance
.
In
keeping
with
these
features
the
Magne
-
blast
breakers
are
designed
for
in
-
terchangeability
and
manueverability
,
to
-
gether
with
reliability
and
low
maintenance
requirements
.
The
Magne
-
blast
Circuit
Breaker
oper
-
ates
on
the
principle
that
an
arc
can
be
ial
.
v
The
AM
-
2.4
/
4.16
Magne
-
blast
Break
-
er
is
available
in
a
number
of
current
and
voltage
ratings
.
Refer
to
the
breaker
nameplate
for
the
complete
rating
inform
-
ation
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
PROPER
INSTALLATION
AND
MAIN
-
TENANCE
ARE
NECESSARY
TO
INSURE
CONTINUED
SATISFACTORY
OPERATION
OF
THE
BREAKER
.
The
following
instruc
-
tions
will
provide
complete
infomation
for
placing
the
magne
-
blast
breaker
in
ser
-
vice
and
for
maintaining
satisfactory
operation
.
RECEIVING
,
HANDLING
AND
STORAGE
Loose
parts
associated
of
the
breaker
,
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
.
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
equipment
from
moisture
and
cement
dust
,
as
this
com
-
bination
has
a
very
corrosive
effect
on
many
parts
.
3
.
Machined
parts
of
the
operating
mech
-
anism
,
etc
.
,
should
be
coated
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
.
RECEIVING
AND
HANDLING
Each
breaker
is
carefully
inspected
and
packed
by
workmen
experienced
in
the
nroper
handling
and
packing
of
electrical
quipment
.
Immediately
upon
receipt
of
the
circuit
breaker
,
an
examination
should
be
made
for
any
damage
sustained
in
tran
-
sit
.
If
injury
or
rough
handling
is
evident
,
a
damage
claim
should
be
filed
immediately
with
the
transportation
company
and
the
nearest
General
Electric
Sales
Office
should
be
notified
.
STORAGE
It
is
recommended
that
the
breaker
be
put
into
service
immediately
in
its
per
-
manent
location
.
If
this
is
not
possible
,
the
following
precautions
must
be
taken
to
insure
the
proper
storage
of
the
breaker
:
1
.
The
breaker
should
be
carefully
pro
-
tected
against
condensation
,
preferably
by
storing
it
in
a
warm
dry
room
,
since
water
absorption
has
an
adverse
effect
on
the
insulation
parts
.
Circuit
break
-
ers
for
outdoor
metal
-
clad
switchgear
should
be
stored
in
the
equipment
only
when
power
is
available
and
the
It
is
expected
that
due
care
will
be
exer
-
cised
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
A
nail
puller
should
be
used
to
open
the
crates
,
and
care
should
be
exercised
to
prevent
tools
from
striking
either
the
crate
or
any
part
DESCRIPTION
give
high
speed
closing
and
opening
.
The
closing
operation
is
controlled
by
the
control
device
(
7
)
.
The
control
device
also
per
-
mits
trip
free
operation
(
tripping
the
break
-
er
at
any
time
during
the
closing
operation
)
.
prevents
solenoid
pumping
(
reclosing
)
after
a
trip
free
operation
.
For
AC
closing
operation
,
rectifiers
mounted
elsewhere
in
the
metal
-
clad
unit
are
used
to
supply
the
direct
current
on
which
the
closing
coil
operates
.
The
breaker
can
be
opened
elec
-
trically
,
by
remote
control
,
or
manually
,
by
means
of
the
manual
trip
device
(
6
)
.
All
secondary
connections
from
the
breaker
to
the
metal
-
clad
unit
are
made
through
the
coupler
(
1
)
.
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
arc
-
ing
contacts
,
an
interrupter
,
and
an
enclos
-
ing
box
barrier
that
segregates
the
inter
-
rupting
units
from
each
other
to
provide
insulation
between
phases
as
well
as
from
each
phase
to
ground
.
The
primary
con
-
nections
to
the
associated
metal
-
clad
equipment
are
made
through
the
primary
disconnect
studs
.
The
MS
-
13
operating
mechanism
shown
in
Fig
.
1
is
of
the
solenoid
type
designed
to
A
positive
interlock
and
interlock
switch
are
provided
between
the
breaker
and
metal
-
clad
unit
to
prevent
the
raising
or
lowering
of
the
breaker
in
the
unit
while
in
the
closed
position
and
to
prevent
a
closing
operation
when
the
breaker
is
not
in
either
the
fully
raised
or
lowered
position
.
A
plunger
type
interlock
can
also
be
provided
to
prevent
the
closing
of
two
adjacent
breakers
at
the
same
time
or
to
operate
an
additional
auxiliary
switch
mounted
in
the
metal
-
clad
unit
.
and
The
operating
mechanism
used
on
those
breakers
designed
for
MI
-
6
metal
-
clad
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
purchaser
'
s
purposes
,
the
matter
should
be
referred
to
the
General
Electric
Company
.
3
Courtesy of NationalSwitchgear.com

GEH
-
2000
Magne
-
Blast
Circuit
Breaker
Type
AM
equipment
differs
somewhat
from
those
de
-
signed
for
M
-
26
equipment
but
its
operation
principally
the
same
.
This
mechanism
is
ntrolled
by
a
relay
scheme
mounted
in
the
metal
-
clad
unit
and
a
cut
-
off
switch
located
on
the breaker
instead
of
the
control
device
.
Two
seven
terminal
secondary
couplers
also
replace
the
one
sixteen
terminal
coup
-
ler
.
The
positive
interlock
between
the
breaker
and
metal
-
clad
unit
is
replaced
with
a
trip
interlock
that
trips
the
mech
-
anism
before
raising
or
lowering
of
the
breaker
can
be
accomplished
.
A
fork
-
type
lever
can
be
furnished
to
operate
an
aux
-
iliary
switch
mounted
in
the metal
-
clad
unit
.
For
detailed
explanation
of
the
opera
-
tion
of
the breaker and
mechanism
refer
to
the
section
OPERATION
.
I
5
A
i
V
+
O
"
.
1
MiN
16
16
22
S I
3
3
\
>
\
/
4
4
\
5
5
6
6
cc
ac
(
O
CJ
CC
to
eg
1
.
Stationary
pritnary
Contacts
2
.
Movable
Primary
Contacts
3
.
Buffer
Block
4
.
Stationary
Arcing
Contacts
Fig
.
3
Contact
Adjustaents
5
.
Movable
Arcing
Contacts
6
.
Upper
Arc
Runner
eo
oi
LL
.
INSTALLATION
The
following
instructions
explain
the
necessary
steps
to
be taken
before
the
breaker
is
placed
in
the metal
-
clad
unit
.
'
"
Ms
includes
a
complete
check
of
all
of
breaker
adjustments
,
in
addition
to
uiorough
inspection
.
For
final
installa
-
tion
instructions
refer
to
any
issue
of
the
Metal
-
clad
Switchgear
Instruction
Book
,
GEH
-
1802
.
Reference
should also
be made
to
the
connection
diagram
that
is
furnished
with
each
unit
.
upper
arc runner
(
6
)
without
touching
.
All
adjustments
should
be
checked
not
only
during
the
initial
installation
of
the
breaker
but also
during
periodic
inspec
-
V
PRIMARY
CONTACT
GAP
tioas
and
whenever
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
barrier
and
the
mechanism
cover
.
Refer
to
Fig
.
4
.
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
(
25
)
,
Fig
.
5
,
and
turn
the
adjusting
nut
(
26
)
on
stud
(
9
)
.
Screwing
the
adjusting
nut
down
will
decrease
the
primary
contact
gap
.
Tighten
the check
nut
and
remeasure
the
contact
gap
(
close
and
trip
the
breaker
before
checking
the
measurement
)
.
\
PRIMARY
CONTACT
WIPE
DO
NOT
WORK
ON
EITHER
THE
BREAKER
OR
THE
MECHANISM
WHILE
IN
THE
CLOSED
POSITION
UNLESS
THE
PROP
AND
TRIP
LATCH
HAVE
BEEN
SECURELY
WIRED
OR BLOCKED TO
PRE
-
VENT
ACCIDENTAL
TRIPPING
.
When
the breaker
Is
closed
,
as
shown
in
Fig
.
3
,
the
stationary
primary
contacts
(
1
)
.
should
rise
5
/
16
"
+
0
-
l
/
l
6
"
.
To
obtain
this
adjustment
,
open
the breaker
and
,
referring
to
Fig
.
4
,
loosen
the
check
-
TRm
T
ATPH
U
/
TDI
?
nut
(
4
)
and
turn
the
adjusting
nut
(
3
)
.
DA 1
L
WIPE
Screwing
up
on
the
adjusting
nut
will
de
-
Refer
to
Fig
.
5
.
The
wipe
of
the
trip
crease
the
primary
contact
wipe
,
down
will
latch
(
4
)
on
the
trip
roller
(
6
)
should be
from
increase
it
.
Tighten
the check
nut
,
close
3
/
16
"
to
1
/
4
"
.
This
can
be
measured
by
the
breaker
and
recheck the
wipe
.
With
putting
a
film
of
grease
on
the
latch
(
4
)
,
the
primary
contact
wipe
correctly
ad
-
closing
the
breaker
part
way
,
and
trip
-
justed
.
the
clearance
between
the
contact
ping
.
The
mechanism
has the
proper
trip
(
7
)
and the
buffer
block
should
be
latch
wipe
when the latch
rests
against
the
1
/
16
"
or
greater
(
as
shown
in
Fig
.
3
)
stop
pin
(
5
)
.
No
adjustment
is
provided
and
when
the breaker
is
fully
closed
.
a
visual
inspection
is
usually
all that
is
required
.
If
this
setting
is
not
correct
,
look
for
insufficient
travel
of
the
trip
shaft
(
3
)
.
ADJUSTMENTS
Although
the
breaker
has
been
com
-
pletely
adjusted
and
tested
at
the
factory
,
it
is
possible
that
unusually
rough
handling
during
transportation
may
have
caused
some
loosening
or
disturbance
of
parts
of
the
apparatus
.
It
is
therefore
advisable
to
review
all
adjustments
before
placing
the
breaker
in
service
,
making
readjustments
wherever
necessary
.
arm
ARCING
CONTACT
WIPE
Refer
to
Fig
.
3
.
Close
the
breaker
until
the
arcing
contacts
just
touch
.
This
can
be
determined
with
the
use
of
a
circuit
ISM
IN
THE
CLOSED
POSITION
,
KEEP
continuity
tester
such
as
a
light
indication
FINGERS
CLEAR
OF
THE
LINKAGE
,
AS
or
bell
set
In
this
position
,
the
gap
between
ACCIDENTAL
TRIPPING
CAN
CAUSE
SE
-
the
stationary
primary
contacts
(
1
)
and
the
VERE
INJURY
,
movable
primary
contact
(
2
)
should be
5
/
16
”
or
greater
.
This
setting
has been
PROP
CLEARANCE
made
in
the
factory
and
no
adjustment
is
provided
.
A
wipe
of
less
than
5
/
16
"
is
usually
an
indication
that
the
arcing
con
-
closed
as
far
as
possible
with
the
mainte
-
tacts
need
to
be
replaced
.
When
making
nance
device
,
the
clearance
between
the
this
check
,
also
see
that
the
movable
arcing
closing
pin
(
10
)
and the
prop
(
15
)
should
contact
(
5
)
passes
through
the
slot
in
the
be
l
/
32
"
to
3
/
32
"
.
Measure
the
prop
A
maintenance
operating
device is
pro
-
vided
for
operation
of
the
breaker
during
these
adjustment
checks
.
Mount the
device
as
shown
in
Fig
.
2
,
and
turn
the
release
valve
(
4
)
firmly
to
the
right
.
To close
the
breaker
,
operate
the handle
(
3
)
with
a
pump
-
ing
motion
.
By
turning
the
release valve
(
4
)
to
the
left
,
the
closing
armature
will
return
to
its
normal
position
.
Electrical
operation
must not
be
attempted
until
the
breaker
has been
operated
manually
through
complete
stroke several
times
and
1
installation
inspection
has been
com
-
WHEN
WORKING
ON
THE
MECHAN
-
Refer
to
Fig
.
5
.
With
the
breaker
pieced
.
4
Courtesy of NationalSwitchgear.com

Magne
-
Blast
Circuit
Bre
Type
AM
GEH
-
2000
clearance
with
a
feeler
gage
to
determine
whether
or
not
an
adjustment
should be
ade
,
and
if
so
,
exactly
how much
adjust
-
ent
will be
required
.
To
make
the
ad
-
justment
,
it
will
first
be
necessary
to
open
the
breaker
and
remove
the
maintenance
operating
device
.
Remove
the
stop
nuts
(
22
and
24
)
being
careful
not to
drop
the
armature
(
21
)
.
Lower
the
armature
from
the mechanism
and
remove
the
two
set
screws
(
19
)
.
Remove
the
closing plunger
(
17
)
from
the
armature
and add
or
subtract
the
necessary
thickness
of
shims
(
20
)
to
give
the
required
adjustment
,
then
replace
the
closing
plunger
,
screwing
it
down
against
the
shims
.
Using
a
small drill
,
spot
the
closing
plunger through
the
set
screw
hole
.
Replace
the
set
screws
.
To
remount
the
armature
on
the breaker
,
compress
the
piston
ring
(
18
)
.
After
reassembly
,
re
-
mount
the
maintenance
closing
device and
check the
adjustment
.
CLOSING
PLUNGER
CLEARANCE
Refer
to
Fig
.
5
.
With
the breaker
in
the
open
position
,
the
clearance
between
the
closing plunger
roller
(
14
)
should
be
obtain
this
clearance
,
the
nuts
(
22
)
two
armature
guide
bolts
(
23
)
n
raised
or
lowered
.
Both
nuts
should be
moved the
same
amount
.
After
making
an
adjustment
,
close and
open
the
breaker
and recheck
the
plunger
clearance
.
Repeat
the
adjustment
if
necessary
.
\
o
2
00
‘
175
i
and the
closing
16
"
to
3
/
16
"
.
To
i
on
the
may
be
o
QO
1
.
Operating
Rod
2
.
Operating
Rod
Pin
3
.
Adjusting
Nut
4
.
Check
Nut
5
.
Stationary Primary
Contacts
6
.
Movable
Primary
Contacts
7
.
Contact
Ana
8
.
Yoke
=
t
ct
u
.
Adjustable
Coupling
for
Making Primary
Contact
Wipe
Adjustment
Fig
.
4
1
.
Main
Oper
.
Shaft
2
.
llain
Crank
3
.
Trip
Shaft
4
.
Trip
Latch
5
.
Trip
Latch
Stop
6
.
Trip
Roller
7
.
Position
Indicator
8
.
Clevis
9
.
Adjustable
Stud
10
.
Closing
Pin
11
.
Opening Spring Housing
12
.
Opening Spring
,
Inner
13
.
Opening
Spring
,
Outer
14
.
Closing
Roller
15
.
Prop
16
.
Closing
Coil
17
.
Closing Plunger
18
.
Piston
Ring
19
.
Set
Screw
20
.
Shims
21
.
Closing
Armature
22
.
Stop
Nuts
23
.
Armature
Guide
Bolts
24
.
Stop
Nuts
25
.
Check
Nut
26
.
Adjusting
Nut
co
s
2
04
5
to
6
u
.
To
20
Y
/ / // /
/
/
/ /
A
/
/
// // //
A
21
22
23
24
Fig
.
5
Cross
Section
of
MS
-
13
Meehan
iso
5
.
t
Courtesy of NationalSwitchgear.com

<
I
2
3
I
4
5
^
1
.
Back
Auxiliary
Switch
2
.
Mounting
Screw
^
3
.
Top
Auxiliary
Switch
4
.
Plunger
5
.
Operating
Arm
6
.
Trip
Lever
7
.
Plunger
Guide
6
J
|
8
1
.
Interlock
Shaft
2
.
Latch
Check
Switch
Am
*
^
-
3
.
Latch
Checking
Switch
4
.
Trip
Shaft
5
.
Interlock
Switch
Am
v
.
6
.
Interlock
Switch
Control
Device
*
in
as
far
as
possible
.
In
this
position
the
clearance
between
the
switch
plunger
(
2
)
and
the
adjustment
screw
(
3
)
should
be
not
more
than
1
/
32
”
.
If
adjustment
is
neces
-
sary
,
add
or
remove
washers
(
4
)
as
re
-
quired
.
AUXILIARY
DEVICES
Plunger
Interlock
(
AM
-
2.4
/
4.16
-
100
/
150
-
3
and
150
/
250
-
3
)
Fig
.
6
Interlock
Switch
and
Latch
Checking
Switch
Refer
to
Fig
.
9
.
With
the
breaker
in
the
open
position
,
the
vertical
distance
"
A
"
from
the
top
of
the
interlock
bolt
(
2
)
to
the
bottom
of
the
elevating
bar
(
13
)
should
be
15
-
19
/
32
"
±
1
/
16
"
.
To
change
this
ad
-
justment
add
or
remove
washers
(
3
)
.
INTERLOCK
SWITCH
WIPE
Referring
to
Fig
.
6
,
rotate
the
interlock
shaft
(
1
)
manually
clockwise
to
release
the
interlock
switch
arm
(
3
)
.
The
point
at
which
the
contacts
make
can
be
determined
with
a
circuit
continuity
tester
such
as
a
light
indicator
or
bell
set
.
To
obtain
ad
-
justment
on
the
interlock
switch
(
6
)
,
bend
the
interlock
switch
arm
(
3
)
.
The
roller
and
crank
on
the
interlock
switch
(
6
)
should
have
1
/
32
"
to
1
/
16
"
overtravel
after
final
adjustment
.
CONTROL
DEVICE
ADJUSTMENT
Latch
Checking
Switch
Wipe
Auxiliary
Switch
Linkage
(
Furnished
Special
on
AM
-
2.4
/
4.16
-
100
/
Referring
to
Fig
.
6
,
rotate
the
trip
shaft
(
5
)
manually
clockwise
to
release
the
latch
checking
switch
arm
(
2
)
.
The
point
at
which
the
contacts
make
can
be
determined
with
a
circuit
continuity
tester
such
as
a
light
indicator
or
bell
set
.
To
obtain
adjustment
on
the
latch
checking
switch
(
4
)
,
bend
the
latch
checking
switch
arm
(
2
)
.
The
roller
and
crank
on
the
latch
checking
switch
(
4
)
should
have
1
/
32
to
1
/
16
overtravel
after
final
adjustment
150
A
-
3
and
-
150
/
25
QA
-
3
)
Refer
to
Fig
.
10
.
With
the
breaker
in
the
open
position
,
the
distance
from
the
center
line
of
the
front
bushings
(
1
)
to
the
center
of
the
slot
in
the
fork
lever
(
2
)
should
be
12
-
9
/
32
"
as
shown
.
To
change
this
setting
,
loosen
the
locking
bolts
(
3
)
and
move
the
fork
level
in
the
proper
direction
.
Tighten
the
lock
bolts
.
FINAL
INSPECTION
AND
TEST
1
.
For
ease
in
reviewing
the
adjustments
,
the
following
are
recapitulated
:
a
.
Primary
contact
wipe
:
5
/
16
"
+
0
-
1
/
16
"
.
Referring
to
Fig
.
7
,
measure
the
over
-
travel
of
the
two
auxiliary
switch
plungers
.
Manually
operate
the
control
device
by
pressing
the
operating
arm
(
5
)
the
full
extent
of
travel
to
the
rear
.
With
the
device
in
this
position
further
depress
the
plunger
(
4
)
on
the
top
auxiliary
switch
(
3
)
.
The
gap
between
the
plunger
and
operating
arm
should
be
1
/
32
"
or
greater
.
To
increase
the
overtravel
,
loosen
the
screws
(
2
)
and
move
the
switch
toward
the
rear
of
the
mounting
plate
.
Tighten
the
screws
and
recheck
the
adjustment
.
Impact
Trip
,
Current
Trip
,
Capacitor
Trip
,
and
Undervoltage
Trip
Devices
Fig
.
9
shows
the
necessary
settings
that
are
to
be
checked
when
these
devices
are
furnished
.
The
amount
of
wipe
between
the
trip
roller
(
16
)
and
the
trip
latch
(
15
)
should
be
3
/
32
"
to
5
/
32
"
.
This
can
be
altered
by
changing
the
number
of
shims
under
the
block
against
which
the
trip
plate
(
14
)
stops
.
In
order
to
trip
properly
,
the
clearance
between
the
trip
bolt
(
11
)
and
the
trip
plate
*
(
9
)
should
be
1
/
32
"
to
1
/
16
"
.
This
can
be
far
m
In
a
similar
manner
,
check
the
over
-
travel
on
the
back
auxiliary
switch
(
1
)
.
i
9
2
altered
by
releasing
the
check
nut
and
|
screwing
the
trip
bolt
(
11
)
in
or
out
of
the
i
reset
arm
(
8
)
.
^
"
'
•
2
*
When
an
undervoltage
device
is
fur
-
nished
check
the
clearance
between
the
f
?
*
'
.
trip
hammer
(
19
)
and
the
trip
plate
(
14
)
,
gy
with
the
undervoltage
coil
energized
.
This
clearance
should
be
1
/
32
"
to
1
/
16
"
and
can
be
altered
by
removing
the
connecting
pin
at
either
end
of
the
adjusting
rod
assembly
(
20
)
,
and
turning
the
clevis
at
that
end
.
&
3
BEFORE
MANUALLY
OPERATING
THE
CONTROL
DEVICE
,
MAKE
CERTAIN
THAT
ALL
CONTROL
POWER
TO
THE
BREAKER
HAS
BEEN
DISCONNECTED
.
MANUAL
OPERATION
OF
THE
CONTROL
DEVICE
WITH
CONTROL
POWER
CON
-
NECTED
WILL
ENERGIZE
THE
CLOSING
COIL
AND
PRODUCE
A
CLOSING
OPERA
-
TION
.
4
g
ry
*
:
cm
«
3
5
H
£
a
&
.
r
CUT
-
OFF
SWITCH
ADJUSTMENTS
(
AM
-
2.4
/
4.16
-
100
/
150
A
-
3
,
-
150
/
250
A
-
3
)
Refer
to
Fig
.
8
.
With
the
breaker
in
he
open
position
,
the
clearance
between
he
switch
plunger
and
the
adjusting
screw
is
obtained
by
pushing
the
switch
plunger
(
2
)
-
1
.
Cut
-
off
Switch
2
.
Switch
Plunger
3
.
Adjusting
Bolt
4
.
Washers
5
.
Lever
Ann
After
checking
all
the
mechanical
ad
-
justments
as
outlined
above
,
operate
the
devices
manually
to
make
certain
that
they
trip
and
reset
properly
.
Fig
.
8
Cut
-
off
Switch
Adjustments
6
Courtesy of NationalSwitchgear.com

rA
*
to
2
’
'
A
«
2
37
si
3
V
4
'
V
/
*
M
/
4
X
3
Magne
-
Blast
Circuit
Breaker
Type
AM
GEH
-
2000
2
3
!
'
>
1
1
.
Front
Disconnect
Stud
2
.
Plunger
Interlock
Bolt
3
.
Washers
4
.
Connecting
Rod
5
.
Reset
Plate
6
.
Reset
Roller
7
.
Main
Operating
Shaft
8
.
Reset
Arts
9
.
Trip
Plate
10
.
Spring
11
.
Trip
Bolt
12
.
Clevis
13
.
Elevating
Bar
14
.
Impact
Trip
Plate
15
.
Trip
Latch
16
.
Trip
Roller
17
.
Trip
Armature
18
.
Trip
Lever
19
.
Undervoltage
Trip
Hamer
20
.
Adjusting
Rod
21
.
Manual
Trip
Button
22
.
Trip
Setting
Plate
23
.
Undervoltege
Device
{
!
4
-
3
.
14
15
&
i
*
16
i
•
nTO
*
17
18
\
&
o
IS
!
C
HTO
;
C
.
0
20
10
m
i
o
11
-
o
c
2
2
12
-
23
X X
13
=
f
S
as
to
i
at
Fig
.
9
Adjustments
On
Current
Trip
Device and
Undervoltage
Trip
Device
,
Show
With
The Breaker
In
The
Closed
Position
c
*
u
_
2
3
4
5
6
4
.
See
that
all
bearing
surfaces
of
the
mechanism
have
been
lubricated
.
Refer
to
the section
on
LUBRICATION
.
5
.
Operate
the breaker
slowly
with
the
maintenance
closing
device
and
note
that
there is
no
excessive
binding
or
friction and
that
the
breaker
can
be
moved
to
the
fully
opened
and
fully
closed
positions
.
6
.
See
that
any
place
where the
surface
of
the
paint
has
been
damaged
during
installation
is
repainted
immediately
.
HI
-
POTENTIAL
TEST
If
the breaker
had been stored
for
a
long
period
of
time
,
it
is
recommended
that
the insulation be
checked
before the
breaker is
placed
in
service
.
A
standard
60
cycle
high
potential
test
at
14
,
000
volts
RMS
will
normally
indicate
whether
the
breaker
is
satisfactory
for
service
.
With
the
breaker
contacts
in
the
fully
opened
position
,
apply
the
high
potential
to
each
terminal
of
the breaker
individually
for
one
minute with
all
other
terminals
and
the
breaker
frame
grounded
.
After
high
potential
tests
are
made
on
organic
insulating
materials
,
these materials should
be
inspected
for
visible
leakage
current
paths
,
and
necessary
action
must
be taken
to
replace
insulation
that
may
have been
affected
by
moisture
absorption
.
The
high
potential
test
is also recommended
for
breakers which
have been removed
from
service and
stored
over
an
extended
period
of
time under
unfavorable
atmospheric
conditions
.
I
1
.
Front
Bushing
2
.
Fork
Lever
3
.
Locking
Bolts
4
.
Pin
5
.
Link
6
.
Rod
i
i
,
s
V
CO
I
\
f
OJ
n
i
If
f
8
f
\
<
£
>
O
ai
Fig
.
10
Auxiliary
Switch
Linkage
u
_
b
.
Arcing
contact
wipe
:
5
/
16
”
or
greater
(
gap
at
primary
contacts
)
.
c
.
Primary
contact
gap
:
3
-
13
/
16
+
1
/
8
"
-
3
/
16
"
.
d
.
Trip
latch
wipe
:
3
/
16
"
to
1
/
4
"
with
trip
latch
resting
against
stop
pin
.
1
/
16
"
±
1
/
32
"
.
1
/
16
"
k
.
Impact
trip
roller
wipe
:
1
/
8
"
t
1
/
32
"
.
l
.
Impact
trip
bolt
clearance
:
3
/
64
"
±
1
/
64
"
.
m
.
Undervoltage
trip
hammer
clear
-
1
/
64
"
.
n
.
Plunger
interlock
(
100
/
150
-
3
and
150
/
250
-
3
)
:
15
-
19
/
32
"
+
1
/
16
"
.
ance :
3
/
64
"
+
e
.
Prop
clearance
:
f
.
Closing
plunger
clearance
:
to
3
/
16
”
.
g
.
Interlock
switch
wipe
:
1
/
16
"
min
.
o
.
Auxiliary
switch
linkage
(
100
/
150
A
-
3
and
150
/
250
A
-
3
)
:
12
-
9
/
32
"
.
2
.
Check
all
nuts
,
washers
,
bolts
,
cotter
pins
,
and
terminal
connections
for
tightness
.
h
.
Control
device switch
overtravel
:
1
/
32
"
min
.
i
.
Cut
-
off
switch
overtravel
:
1
/
32
"
max
.
j
.
Latch
checking
switch
wipe
:
1
/
16
"
min
.
AUXILIARY
DEVICES
3
.
Inspect
all
wiring
to
make
sure
that
no
damage
has resulted
during
in
-
stallation
,
and
test
for
possible
grounds
or
short
circuits
.
On
breakers
that
are
equipped
with
auxiliary
devices such
as
a
current
trip
,
undervoltage
trip
or
capacitor
trip
,
the
device should
be
checked
for
proper
7
•
i
Courtesy of NationalSwitchgear.com

GEH
-
2000
Magne
-
Blast
Circuit
Breaker
Type
AM
electrical
operation
.
The
current
trip
de
-
vice
should
trip
the
breaker
at
3
amperes
.
The
undervoltage
trip
device
should
trip
the
breaker
when
the
control
voltage
drops
below
30
to
60
%
of
rated
voltage
,
and
it
should
pick
up
at
80
%
of
the
control
volt
-
age
or
less
.
An
adjustment
plate
is
pro
-
vided
on
the
front
of
the
undervoltage
trip
device
as
an
aid
in
obtaining
the
desired
setting
.
NOTE
:
When
checking
the
pick
-
up
value
of
the
undervoltage
device
,
apply
a
voltage
equal
to
80
%
of
normal
control
voltage
to
the
undervoltage
device
coil
.
The
device
should
pick
up
at
this
value
.
Do
not
increase
the
voltage
gradually
on
this
coil
as
it
will
overheat
the
coil
,
producing
a
false
reading
,
,
and
may
damage
the
coil
if
excessive
over
-
heating
occurs
.
The
capacitor
trip
should
be
capable
of
tripping
the
breaker
as
late
as
25
seconds
after
the
control
voltage
is
removed
.
If
the
auxiliary
devices
do
not
perform
in
accordance
with
these
specifications
,
a
careful
examination
should
be
made
for
defective
parts
.
CONTROL
POWER
CHECK
After
the
breaker
has
been
closed
and
opened
slowly
several
times
with
the
maintenance
closing
device
,
and
the
mech
-
anism
adjustments
checked
as
described
above
,
the
operating
voltages
should
be
checked
at
the
closing
coil
and
trip
coil
terminals
.
For
electrical
operation
of
the
breaker
,
the
control
power
may
be
either
an
alternating
or
direct
current
source
.
The
operating
ranges
for
the
closing
and
tripping
voltages
are
given
on
the
breaker
nameplate
.
Ordinarily
,
standard
ranges
apply
which
are
as
follows
:
4
5
6
CM
8
8
oi
u
_
%
1
.
Shunting
and
Anti
-
Pusnp
Switch
*
2
.
Seal
-
in
Switch
*
*
3
.
Operating
Coil
4
.
Crank
5
.
Stationary
Contact
Assembly
6
.
Movable
Contact
Assembly
7
.
Arm
8
.
Arc
Chute
9
.
Trip
Lever
10
.
Plunger
Guide
Fig
.
II
Control
Device
CLOSING
RANGE
NOMINAL
VOLTAGE
TRIPPING
RANGE
125
V
.
d
-
C
250
V
.
d
-
c
230
V
.
a
-
c
90
-
130
V
.
d
-
c
180
-
260
V
.
d
-
c
190
-
250
V
.
a
-
c
70
-
140
V
.
d
-
c
140
-
280
V
.
d
-
c
190
-
250
V
.
a
-
c
CO
§
8
When
repetitive
operation
is
re
-
NOTE
:
quired
from
a
direct
current
source
,
the
closed
circuit
voltage
at
the
closing
coil
should
not
exceed
115
V
.
d
-
c
and
230
V
.
d
-
c
at
the
nominal
voltages
of
125
V
.
d
-
c
and
250
V
.
d
-
c
respectively
.
CO
9
i
10
CM
I
I
ca
For
a
-
c
operation
,
two
copper
-
oxide
rectifiers
,
mounted
elsewhere
in
the
metal
-
clad
unit
,
are
used
.
A
tapped
resistor
is
provided
in
each
rectifier
circuit
to
control
the
d
-
c
voltage
.
The
resistor
setting
should
be
adjusted
so
that
the
closed
circuit
volt
-
age
at
the
breaker
closing
coil
terminals
is
110
to
120
volts
d
-
c
.
Where
repetitive
operation
is
set
at
105
to
(
2
u
_
13
14
required
,
the
voltage
should
be
115
volts
d
-
c
.
/
V
/
/
A
Resistor
Setting
,
Ohms
*
a
-
c
Volts
(
Closed
Circuit
)
Winter
Summer
1
/
4
0
190
-
196
194
-
206
204
-
216
214
-
226
224
-
236
234
-
246
244
-
250
1
.
Main
Crank
2
.
Trip
Latch
3
.
Trip
Roller
4
.
Closing
Roller
5
.
Piston
Ring
6
.
Closing
Armature
7
.
Armature
Guide
Bolts
8
.
Spring
Retainer
9
.
Opening
Spring
,
Inner
10
-
Opening
Spring
,
Outer
11
.
Closing
Pin
12
.
Prop
13
.
Closing
Coil
14
.
Qosing
Plunger
Rod
1
/
2
0
1
/
4
1
/
2
1
/
4
3
/
4
1
/
2
1
1
-
1
/
4
1
-
1
/
4
3
/
4
1
*
a
-
c
Volts
as
measured
across
the
rec
-
tifier
and
a
-
c
series
resistor
.
Fig
.
12
Cross
Section
of
MS
-
13
Operating
Mechanism
in
the
Open
position
8
Courtesy of NationalSwitchgear.com

Magne
-
Blast
Circuit
Breaker
Type
AM
GEH
-
2000
The
a
guide
•
articular
combination
of
ambient
temper
-
ture
and
a
-
c
supply
voltage
.
Summer
set
-
tings
are
used
where
ambient
temperatures
are
normally
above
freezing
(
32
°
F
)
.
It
is
necessary
to
use
winter
settings
where
the
ambient
temperature
may
drop
to
20
°
F
or
less
at
any
time
,
explanation
of
copper
-
oxide
rectifiers
for
circuit
breaker
application
,
refer
to
In
-
struction
Book
GEI
-
11306
.
preceding
tabulation
is
included
as
for
adjusting
the
resistors
for
the
and
read
the
d
-
c
voltage
at
the
closing
coil
terminals
.
relay
to
de
-
energize
the
circuit
.
required
to
close
simultaneously
,
the
closed
circuit
voltage
at
the
closing
coil
of
each
breaker
must
fall
within
the
specified
limits
.
Release
the
closing
DO
NOT
MAINTAIN
VOLTAGE
ON
THE
CLOSING
COIL
ANY
LONGER
THAN
THE
FEW
SECONDS
REQUIRED
TO
READ
THE
VOLTMETER
.
These
coils
are
designed
for
intermittent
operation
and
will
be
damaged
by
prolonged
current
flow
.
Electrical
closing
or
opening
is
ac
-
complished
by
merely
energizing
the
closing
or
trip
coil
circuit
.
Control
switches
are
provided
for
this
purpose
on
the
metal
-
clad
unit
.
It
is
also
possible
to
trip
the
breaker
manually
by
pressing
the
manual
trip
button
(
6
)
,
Fig
.
1
.
For
a
more
detailed
If
the
closed
circuit
voltage
at
the
ter
-
minals
of
the
closing
coil
does
not
fall
in
the
specified
range
,
proceed
as
follows
:
To
check
the
d
-
c
voltage
at
the
closing
coil
terminals
,
proceed
as
follows
:
When
all
the
foregoing
inspection
de
-
tails
have
been
checked
,
the
breaker
may
be
safely
placed
in
service
.
Before
the
breaker
is
finally
raised
into
position
in
the
metal
-
clad
unit
,
rub
a
small
amount
of
G
.
E
.
Contact
Lubricant
D
50
H
28
on
the
silvered
portion
of
the
breaker
studs
to
form
a
thin
coating
for
contacting
purposes
.
1
.
a
-
c
control
power
source
-
Decrease
the
series
resistance
to
increase
the
d
-
c
voltage
,
or
increase
the
series
re
-
sistance
to
decrease
the
d
-
c
voltage
.
Recheck
voltage
at
the
closing
coil
.
2
.
d
-
c
control
power
source
-
Check
volt
-
age
at
the
source
of
power
and
line
drop
between
the
power
source
and
breaker
.
1
.
Mechanism
with
a
control
device
,
Fig
.
Close
the
breaker
by
manually
operating
the
control
device
.
Hold
the
contacts
in
the
closed
position
and
read
the
d
-
c
voltage
at
the
closing
coil
ter
-
minals
.
release
the
control
device
.
11
.
To
de
-
energize
the
circuit
,
NOTE
:
This
breaker
mechanism
com
-
bination
is
designed
only
for
electrical
closing
when
in
use
.
NEVER
ATTEMPT
MANUAL
CLOSING
WITH
THE
BREAKER
IN
SERVICE
,
for
under
such
conditions
,
sufficient
closing
force
and
speed
cannot
be
applied
.
2
.
Mechanism
with
cut
-
off
switch
,
Fig
.
8
.
Close
the
breaker
by
manually
oper
-
ating
the
control
relay
located
in
the
metal
-
clad
unit
.
Hold
the
relay
closed
When
two
or
more
breakers
,
operating
from
the
same
control
power
source
,
are
OPERATION
CLOSING
OPERATION
the
trip
coil
,
the
trip
plunger
rotates
the
trip
latch
(
2
)
,
Fig
.
12
,
causing
the
oper
-
ating
mechanism
linkage
to
collapse
.
The
energy
stored
in
the
opening
springs
(
9
and
10
)
is
thus
released
,
opening
the
breaker
.
During
this
operation
,
the
trip
coil
circuit
is
de
-
energized
,
and
upon
completion
of
the
opening
operation
,
the
operating
mechan
-
ism
is
returned
to
its
normal
position
,
ready
for
closing
.
allowing
the
armature
to
return
by
gravity
to
its
original
position
.
The
control
device
plunger
also
mechanically
trips
the
seal
-
in
switch
,
de
-
energizing
the
control
device
coil
if
the
closing
control
switch
is
not
closed
.
If
the
closing
control
switch
is
held
in
the
closed
position
throughout
and
after
the
breaker
closing
operation
,
the
control
de
-
vice
linkage
will
remain
picked
up
and
be
unable
to
reset
to
prepare
for
another
breaker
closing
operation
.
This
arrange
-
ment
insures
that
"
pumping
"
of
the
breaker
will
not
occur
during
a
trip
-
free
oper
-
ation
.
The
closing
operation
of
the
breaker
is
primarily
controlled
by
the
control
device
,
Fig
.
11
,
mounted
on
the
operating
chanism
.
The
closing
sequence
is
in
-
ated
from
a
control
switch
mounted
on
the
door
of
the
metal
-
clad
unit
or
at
a
.
re
-
mote
operating
station
.
Operation
of
the
closing
control
switch
energizes
the
pick
-
up
coil
of
the
control
device
.
As
the
control
device
closes
,
seal
-
in
contacts
shunt
the
closing
control
switch
to
allow
the
opening
of
the
closing
control
switch
contacts
without
affecting
the
overall
closing
operation
.
This
type
of
arrangement
assures
complete
clos
-
ing
of
the
breaker
with
only
momentary
contact
of
the
closing
control
switch
.
As
the
breaker
opens
,
the
main
con
-
tacts
part
first
,
shunting
the
current
through
the
arcing
contacts
.
An
arc
forms
as
the
arcing
contacts
part
.
See
Fig
.
13
.
As
the
movable
arcing
contact
(
27
)
is
withdrawn
through
the
slot
in
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
)
.
Estab
-
lishment
of
the
arc
on
the
runners
auto
-
matically
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
250
MVA
interrupter
contains
one
upper
mag
-
netic
blowout
coil
and
one
lower
blowout
coil
,
each
individually
connected
in
series
with
its
respective
arc
runner
.
The
arc
is
forced
outward
along
the
diverging
arc
runners
by
the
magnetic
field
.
The
operating
sequence
for
breakers
designed
for
MI
-
6
metal
-
clad
equipment
is
similar
to
that
described
above
except
that
a
relay
mounted
elsewhere
in
the
metal
-
clad
unit
replaces
the
control
device
.
Also
,
a
cut
-
off
switch
(
Fig
.
8
)
is
used
to
replace
the
mechanical
trip
arrange
-
ment
of
the
control
device
.
The
cut
-
off
switch
energizes
an
auxiliary
relay
to
de
-
energize
the
main
relay
.
The
closing
speed
of
the
arcing
contact
should
be
7
to
10
feet
per
second
for
the
100
/
150
MVA
breakers
and
9
to
12
feet
per
second
for
the
150
/
250
MVA
breakers
with
rated
closed
circuit
voltage
at
the
closing
coil
terminals
,
the
average
speed
of
the
movable
arcing
contact
from
a
point
1
"
before
the
tip
is
tangent
to
the
lower
surface
of
the
upper
arc
runner
to
the
tangent
position
.
those
Operation
of
the
control
device
ener
-
gizes
the
breaker
closing
coil
by
closing
the
main
control
device
contacts
(
5
and
6
)
,
Fig
.
11
.
Once
the
control
device
contacts
are
picked
up
,
they
are
electrically
held
in
the
closed
position
until
the
breaker
closing
operation
is
completed
.
Energizing
the
breaker
closing
coil
raises
the
armature
(
6
)
,
Fig
.
12
which
in
turn
lifts
the
closing
roller
(
4
)
through
plunger
(
14
)
.
is
transmitted
through
the
mechanism
link
-
age
and
rotates
the
main
crank
(
1
)
,
closing
the
breaker
contacts
.
As
the
armature
reaches
the
end
of
its
travel
,
the
prop
(
12
)
rotates
beneath
the
pin
(
11
)
latching
the
breaker
in
the
closed
position
.
During
the
operation
,
the
opening
springs
(
9
are
compressed
in
readiness
for
an
This
motion
These
speeds
represent
closing
and
10
)
opening
operation
.
Air
trapped
above
the
armature
acts
as
a
dashpot
to
absorb
the
energy
of
the
mechanism
as
it
approaches
the
end
of
its
stroke
.
At
the
same
time
,
the
arc
is
being
forced
into
the
arc
chute
(
8
)
which
is
com
-
posed
of
a
series
of
gradually
interleaving
insulating
fins
.
These
fins
,
which
project
alternately
from
the
two
opposite
inner
surfaces
of
the
chute
,
elongate
the
arc
into
a
gradually
deepening
serpentine
path
,
so
that
the
electrical
resistance
in
the
paUi
of
the
arc
is
rapidly
increased
and
the
heat
from
the
arc
is
absorbed
.
The
increased
resistance
reduces
both
the
magnitude
and
OPENING
OPERATION
An
electrical
opening
operation
is
in
-
itiated
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
cur
-
rent
devices
used
to
detect
a
fault
on
the
load
side
of
the
breaker
.
By
energizing
Slightly
before
tlje
mechanism
latches
,
control
device
plunger
(
5
)
,
Fig
.
23
,
lanically
trips
the
main
control
device
.
acts
,
de
-
energizing
the
closing
coil
and
9
i
i
i
t
Courtesy of NationalSwitchgear.com

t
%
GEH
-
2000
Magne
-
Blast
Circuit
Breaker
Type
AM
14
15
16
I
—
17
$
2
-
<
0
O
3
18
CM
5
19
CO
©
1
u
.
-
20
4
21
5
-
2 2
6
23
24
8
25
26
—
27
9
28
29
10
L
.
+
.
W
II
\
I
30
12
I
\
I
I
x
I
rw
]
I
13
I
J
-
f
\
o
/
Operating
Rod
Stationary
Primary
Contacts
Movable
Primary
Contacts
Cup
Bearing
Yoke
Movable
Contact
Arm
Assembly
Movable
Arcing
Contact
Booster
Tube
Connection
Bar
Booster
Cylinder
and
Piston
21
.
11
.
Blow
-
out
Coil
12
.
Blow
-
out
Core
13
.
Muffler
14
.
Front
Bushings
15
.
Rear
Bushings
16
-
Frame
17
.
Operating
Crank
18
.
Upper
Horizontal
Barrier
19
.
Spring
Retainer
20
.
Lower
Horizontal
Barrier
Box
Barrier
Handle
Blow
-
out
Core
Blow
-
out
Coil
Arc
Runner
Pole
Piece
Stationary
Arcing
Contact
Box
Barrier
Arc
Chute
Pole
Piece
Arc
Runner
1
.
22
.
2
.
23
.
3
.
24
.
4
.
25
.
S
.
26
.
6
.
27
.
7
.
28
.
8
.
29
.
9
.
30
.
10
.
Fig
.
13
Cross
Section
Of
Breaker
Pole
Unit
10
Courtesy of NationalSwitchgear.com