GE AKR-3-50 User manual

GEK
-
7310
C
(
Includes
Supplement
GEI
-
86134
)
Maintenance
Manual
Power
Circuit
Breakers
Types
AKR
-
3
/
3
A
-
50
and
AKRU
-
3
/
3
A
-
50
i
(
ELECTRIC
GENERAL
W
Courtesy of NationalSwitchgear.com

CONTENTS
Page
GENERAL
DESCRIPTION
General
.
Breaker
Types
Mounting
Fused
Breakers
.
..
Breaker
Ratings
.
.
.
.
Breaker
Description
.
3
3
3
4
4
4
4
5
RECEIVING
,
HANDLING
,
AND
STORAGE
Receiving
and
Handling
Storage
5
5
5
BREAKER
OPERATION
Putting
the Breaker
in
Service
Dr
aw
out
Breakers
Breaker
Insertion
(
Fig
.
3
)
Breaker
Withdrawal
Stationary
Breakers
Pre
-
service
Check
Operating
the
Breaker
Manual
Closing
Electrical
Closing
Opening
the
Breaker
Interlocks
Closing
Spring
Interlock
(
Figs
.
6
A
and
6
B
)
Racking
Mechanism
Interlocks
(
Fig
.
8
)
.
.
Optional
Interlocks
Accessories
Shunt
Trip
Undervoltage
Device
Static
Time
-
delay
Undervoltage
Electric Lockout Device
Auxiliary
Switch
Bell
Alarm
*
....
5
)
5
5
7
7
8
8
8
10
10
10
10
11
11
12
12
13
13
\
(
)
13
14
14
15
BREAKER
MAINTENANCE
Safety
Precautions
General
Arranging
the
Breaker
for
Slow
Closing
.
..
Lubrication
.
'
Replacement
and
Adjustment
of
Components
and
Accessories
Mechanism
(
Figs
.
12
,
13
,
and
14
)
.
.
.
.
Mechanism
Replacement
(
Figs
.
15
and
16
)
Latch
Adjustment
Manual
Handle
Adjustment
Contact
Maintenance
Contact
Replacement
(
Fig
.
17
)
Contact
Adjustment
Components
and
Accessories
.
.
.
Auxiliary
Switch
(
Fig
.
18
)
Shunt
Trip
and
Undervoltage
Device
(
Figs
.
19
and
20
)
Maintenance
of
Static
Delay
Device
for
Undervoltage
(
Figs
.
21
and
22
)
Electrical
Control
Components
‘
..
Bell
Alarm
/
Lockout
(
Fig
.
26
)
.
..
Drawout
Mechanism
and
Interlocks
AKRU
-
50
Fused
Breaker
Fuse
Replacement
..
Open
Fuse
Lockout
Device
(
Fig
.
32
)
Power
Sensor
Overcurrent
Trip
Device
False
Tripping
Caused
by Faulty
Ground
Fault
Operation
Testing
Current
Sensors
Replacement
Magnetic
Trip
Device
(
Figs
.
33
and
38
)
Selective
Tripping
Time
-
current
Curves
15
15
15
16
16
16
18
19
19
19
19
20
)
21
21
22
24
25
27
28
29
29
31
31
34
I
34
i
34
36
36
37
,
38
Courtesy of NationalSwitchgear.com

/
)
LOW
-
VOLTAGE
POWER
CIRCUIT
BREAKERS
TYPES
AKR
-
3
/
3
A
-
50
AND
AKRU
-
3
/
3
A
-
50
GENERAL
DESCRIPTION
GENERAL
Low
-
voltage
power
circuit
breakers
are
used
for
controlling
and
protecting
power
circuits
in
the
low
-
voltage
range
(
usually
up
to
600
volts
)
.
In
serving
this
function
,
they
are
a
means
of
safely
switching
loads
and
automatically
clearing
circuits
when
ab
-
normal
conditions
occur
.
Among
these
conditions
,
the
more
common
are
short
circuits
and
sustained
overloads
and
undervoltages
.
The
proper
use
,
care
,
and
maintenance
of
these
breakers
is
a
prime
safety
consideration
for
the
protection
of
personnel
,
as
well
as
a
means
of
mini
-
mizing
equipment
damage
when
faults
occur
.
Per
-
sons
who
apply
,
use
,
and
service
these
breakers
will
acquire
the
knowledge
they
need
by
gaining
the
information
contained
in
these
instructions
.
BREAKER
TYPES
l
All
of
the
subject
breakers
are
of
the
"
quick
-
make
,
quick
-
break
"
description
,
having
the
feature
of
storing
energy
in
a
closing
spring
for
quick
re
-
lease
in
closing
.
In
closing
,
some
energy
is
trans
-
ferred
to
an
opening
spring
to
be
used
subsequently
for
fast
tripping
.
Fig
.
1
.
(
8041849
)
AKR
-
50
Manual
breaker
Individual
breakers
may
vary
in
how
they
are
mounted
,
how
they
operate
,
how
they
are
applied
and
in
other
categories
as
shown
in
Table
1
.
TABLE
1
Drawout
Stationary
Mounting
t
Manual
,
Fig
.
1
Quick
-
close
Electrical
,
Fig
.
2
Operation
Type
of
Overcurrent
Trip
Device
Power
Sensor
AC
Application
Fused Breakers
Fig
.
2
(
8041919
)
AKRU
-
50
Electrically
operated
breaker
‘
V
Thesm
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
to
provide
for
every
possible
contingency
to
be
met
in
connection
wrth
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

GEK
-
7310
,
Power
Circuit
Breakers
(
Short
circuit
ratings
vary
with
the
system
voltage
on
which
they
are
applied
and
whether
they
are
equipped
with
direct
-
acting
instantaneous
over
-
current
trip
devices
.
See
Table
2
.
MOUNTING
v
Most
breakers
produced
are
of
the
"
drawout
”
type
.
These
breakers
are
equipped
with
features
which
make
them
easy
to
install
in
or
withdraw
from
their
associated
switchgear
equipment
.
These
features
are
a
racking
mechanism
(
which
facilitates
inserting
and
withdrawing
the
breaker
unit
)
and
pri
-
mary
and
control
power
disconnects
which
connect
and
part
automatically
.
Inter
locking
devices
are
included
.
Drawout
breakers
of
the
same
rating
and
type
are
interchangeable
in
their
various
locations
in
the
equipment
.
This
helps
breaker
maintenance
in
that
spare
breakers
can
be
"
plugged
in
"
while
breakers
are
being
inspected
or
serviced
.
The
"
stationary
"
breakers
are
designed
to
be
mounted
on
a
framework
or
panel
,
with
mechanical
fasteners
being
used
to
secure
the
breaker
frame
and
make
power
connections
.
If
control
power
con
-
nections
are
needed
,
a
suitable
terminal
board
is
supplied
.
TABLE
2
Rated
Maximum
Voltage
60
Herte
,
AC
Three
-
phase
Short
-
circuit
Rating
Without
Instantaneous
Trips
With
Instantaneous
Trips
*
)
)
42
,
000
amps
50
,
000
amps
50
,
000
amps
42
,
000
amps
50
,
000
amps
65
,
000
amps
635
508
254
BREAKER
DESCRIPTION
Knowledge
of
how
the
breaker
is
designed
and
how
it
operates
will
enable
the
purchaser
to
make
proper
use
of
the
breaker
and
to
avoid
mistakes
in
its
operation
.
Specific
directions
on
adjustments
and
maintenance
procedures
will
be
treated
later
.
FUSED
BREAKERS
The
three
main
functional
components
of
a
breaker
are
its
mechanism
,
an
assembly
compris
-
ing
the
conductive
members
,
and
the
interrupter
.
Fused
breakers
are
given
the
extra
letter
"
U
"
in
their
model
identification
number
.
Type
AKRU
breakers
are
not
interchangeable
with
standard
gen
-
eral
-
purpose
drawout
breakers
since
their
enclos
-
ures
must
be
modified
to
provide
the
extra
space
required
for
the
fuses
.
(
)
The
mechanism
unit
is
designed
to
receive
en
-
ergy
,
store
it
,
and
later
(
when
called
upon
to
do
so
)
deliver
it
to
close
the
breaker
'
s
contacts
.
It
must
be
able
to
reverse
its
commitment
to
close
the
breaker
at
any
point
upon
the
activation
of
an
auto
-
matic
trip
device
(
i
.
e
.
,
be
"
Trip
-
Free
"
)
.
Finally
,
it
also
must
be
able
to
trip
open
a
closed
breaker
quickly
enough
to
minimize
arc
erosion
and
in
such
a
manner
as
to
effect
proper
arc
transfer
to
the
arc
runner
.
All
fused
breakers
are
equipped
with
an
opened
fuse
lockout
device
(
OFLO
device
)
.
This
automa
-
tically
trips
the
breaker
open
when
any
of
the
three
fuses
open
.
It
also
latches
the
breaker
in
the
opened
position
until
a
resetting
device
is
manually
oper
-
ated
.
This
should
not
be
done
until
the
expended
fuse
is
replaced
.
This
arrangement
eliminates
the
possibility
of
allowing
the
circuit
to
have
only
one
phase
energized
.
The
current
-
carrying
members
of
the
breaker
are
assembled
on
the
back
frame
,
which
provides
the
mechanical
support
required
and
also
the
in
-
sulating
structure
needed
.
The
conductive
mem
-
bers
are
the
studs
for
external
connections
,
mova
-
ble
and
stationary
contact
sets
,
pivots
for
the
mov
-
able
contacts
,
and
provision
for
mounting
the
cur
-
rent
transformers
.
BREAKER
RATINGS
Type
AKR
-
50
breakers
are
1600
-
ampere
frame
size
breakers
.
This
represents
the
maximum
con
-
tinuous
current
they
may
carry
.
This
current
value
is
modified
by
the
rating
of
the
overcurrent
trip
device
with
which
the
breaker
is
equipped
.
The
lowest
available
rating
of
the
Power
Sensor
trip
device
is
200
amperes
.
As
to
voltage
ratings
,
the
breakers
may
be
ap
-
plied
up
to
600
volts
,
ac
.
t
The
interrupter
components
are
,
in
addition
to
the
arcing
contacts
,
the
arc
runners
mounted
on
the
back
base
and
the
removable
arc
quencher
assem
-
blies
.
In
addition
to
these
basic
components
,
a
breaker
may
be
equipped
with
any
combination
of
many
ac
-
cessories
and
interlocking
devices
.
4
Courtesy of NationalSwitchgear.com

Power
Circuit
Breakers
,
GEK
-
7310
RECEIVING
,
HANDLING
,
AND
STORAGE
0
RECEIVING
AND
HANDLING
1
.
The
breaker
should
be
carefully
protected
against
condensation
,
preferably
by
storing
it
in
a
warm
dry
room
,
since
water
absorption
has
an
ad
-
verse
effect
on
the
insulation
parts
.
Circuit
break
-
ers
for
outdoor
switchgear
should
be
stored
in
the
equipment
only
when
power
is
available
and
the
heaters
are
in
operation
to
prevent
condensation
.
Each
breaker
is
carefully
inspected
and
packed
before
shipment
.
Immediately
upon
receipt
of
the
circuit
breaker
,
an
examination
should
be
made
for
any
damage
sustained
in
transit
.
If
damage
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
.
2
.
The
breaker
should
be
stored
in
a
clean
lo
-
cation
free
from
corrosive
gases
or
fumes
.
Par
-
ticular
care
should
be
taken
to
protect
the
equipment
from
moisture
and
cement
dust
,
as
this
combination
has
a
very
corrosive
effect
on
many
parts
.
i
It
is
expected
that
due
care
will
be
exercised
during
unpacking
and
installation
of
the
breaker
so
that
no
damage
will
occur
from
careless
or
rough
handling
,
or
from
exposure
to
moisture
or
dirt
.
Check
all
parts
against
the
packing
list
to
be
sure
that
no
parts
have
been
overlooked
.
CAUTION
:
IF
THE
BREAKER
IS
STORED
FOR
ANY
LENGTH
OF
TIME
,
IT
SHOULD
BE
INSPECTED
PERIODICALLY
TO
SEE
THAT
RUSTING
HAS
NOT
STARTED
AND
TO
ASSURE
GOOD
MECHANICAL
CON
-
DITION
.
SHOULD
THE
BREAKER
BE
STORED
UNDER
UNFAVORABLE
AT
-
MOSPHERIC
CONDITIONS
,
IT
SHOULD
BE
CLEANED
AND
DRIED
OUT
BEFORE
BEING
PLACED
IN
SERVICE
.
STORAGE
It
is
recommended
that
the
breaker
be
put
into
service
immediately
in
its
permanent
location
.
If
this
is
not
possible
,
the
following
precautions
must
be
taken
to
insure
the
proper
storage
of
the
breaker
:
BREAKER
OPERATION
I
screw
is
turned
in
an
internally
threaded
trunnion
supported
by
a
centrally
located
crank
on
the
crank
-
shaft
.
The
power
screw
,
or
jackscrew
,
is
turned
by
means
of
an
external
handle
in
the
form
of
a
crank
.
This
has
,
on
its
end
,
a
square
socket
which
will
engage
the
square
end
of
the
power
screw
in
the
breaker
.
A
sliding
cover
in
the
escutcheon
must
be
moved
aside
so
that
the
handle
may
engage
the
screwshaft
end
.
Turning
the
crank
handle
in
a
clockwise
direction
moves
the
breaker
into
the
con
-
nected
position
.
The
reverse
of
this
causes
the
breaker
to
move
out
.
PUTTING
THE
BREAKER
IN
SERVICE
DRAWOUT
BREAKERS
The
mechanism
used
to
provide
th
6
mechanical
force
required
to
overcome
the
resisting
force
of
the
disconnects
on
Type
AKR
breakers
is
mounted
on
the
breaker
rather
than
in
the
drawout
enclosure
.
This
mechanism
is
referred
to
as
the
"
drawout
”
mechanism
or
the
"
racking
"
mechanism
.
It
is
a
unit
sub
assembly
and
can
be
added
to
a
completely
assembled
breaker
without
doing
any
disassembly
work
on
the
breaker
.
«
BREAKER
INSERTION
{
FIG
.
3
)
This
drawout
mechanism
consists
of
a
crank
-
shaft
and
a
power
screw
which
operates
it
.
Rigidly
fastened
to
each
end
of
the
crankshaft
is
a
crank
arm
having
an
open
slot
which
engages
a
fixed
pin
in
the
equipment
enclosure
.
As
the
crankshaft
ro
-
tates
,
the
crank
arms
,
acting
on
the
stationary
pin
,
cause
the
breaker
to
move
with
respect
to
the
breaker
enclosure
.
The
crankshaft
is
driven
as
the
power
The
procedure
for
inserting
a
breaker
into
its
drawout
enclosure
is
as
follows
:
1
.
Before
inserting
the
breaker
,
apply
a
light
,
even
coating
of
D
50
H
47
grease
to
the
silver
-
plated
bars
in
the
enclosure
which
engage
the
primary
dis
-
connects
of
the
breaker
.
JL
5
Courtesy of NationalSwitchgear.com

GEK
-
7310
,
Power
Circuit
Breakers
5
.
Extend
the
second
rail
.
6
.
Align
the
pins
on
the
breaker
with
the
slots
in
the
rails
and
carefully
lower
the
breaker
,
allow
-
ing
the
pins
to
enter
their
slots
.
Make
sure
the
pins
go
all
the
way
down
to
the
bottom
of
the
slots
;
re
-
move
the
lifting
device
.
7
.
Make
sure
the
breaker
is
open
by
pushing
in
the
trip
button
.
While
holding
in
the
trip
button
,
move
the
sliding
cover
aside
and
then
engage
the
racking
handle
.
)
8
.
If
it
is
possible
to
turn
the
handle
in
a
counter
-
clockwise
direction
,
do
so
until
the
stop
is
reached
and
remove
the
handle
.
If
the
handle
does
not
turn
,
remove
it
.
This
step
is
taken
to
align
the
arms
on
the
ends
of
the
racking
shaft
so
that
they
will
engage
the
pins
in
the
housing
.
If
the
racking
mechanism
has
not
been
operated
while
the
breaker
is
out
of
the
enclosure
,
the
arms
will
be
in
the
right
position
to
engage
the
pins
and
this
step
will
notbe
necessary
.
9
.
Make
sure
that
latches
on
the
ends
of
the
ex
-
tended
rails
are
in
the
unlatched
position
,
and
by
pushing
on
the
breaker
,
roll
it
as
far
as
it
will
go
into
the
enclosure
.
10
.
Put
the
latches
on
the
ends
of
the
rails
into
their
locked
position
.
)
11
.
Push
in
on
the
trip
button
,
move
the
sliding
cover
to
the
right
,
and
engage
the
racking
handle
.
1
.
Spreader
2
.
Drawout
Rail
3
.
Breaker
Rail
Pins
4
.
Slots
in
Rail
5
.
Trip
Button
6
.
Racking
Shaft
Arms
7
.
Housing
Racking
Pin
8
*
Rail
Latch
Link
9
.
Racking
Position
Indicator
10
.
Movable
Inner
Housing
12
.
Rotate
the
handle
clockwise
.
After
about
five
revolutions
,
the
breaker
will
be
in
the
test
position
.
The
indicator
in
the
left
upper
side
of
the
compart
-
ment
will
show
when
this
position
is
reached
.
If
the
control
circuits
are
energized
and
the
breaker
is
electrically
operated
,
the
motor
will
run
when
the
secondary
disconnects
engage
.
This
will
occur
on
about
the
third
turn
of
the
handle
.
The
motor
will
run
,
charging
the
closing
spring
,
until
the
cut
-
off
switches
are
actuated
.
Fig
.
3
.
(
8041582
)
Inserting
the
breaker
2
.
Position
the
breaker
in
front
of
the
cubicle
intended
to
receive
it
and
engage
the
lifting
device
.
A
special
"
spreader
"
is
provided
as
shown
in
Fig
.
3
.
The
hooks
of
the
spreader
are
placed
in
the
forward
square
-
shaped
holes
in
the
breaker
side
sheets
for
standard
breakers
,
and
in
the
holes
near
-
est
the
back
for
AKRU
fused
breakers
.
13
.
In
the
test
position
,
the
secondary
discon
-
nects
,
which
carry
the
control
voltage
,
are
con
-
nected
;
however
,
the
primary
disconnects
,
which
connect
the
power
circuits
,
are
still
widely
separ
-
ated
.
At
this
point
,
electrical
control
devices
on
the
breaker
may
be
operated
for
the
purpose
of
testing
.
)
I
3
.
Open
the
door
of
the
breaker
enclosure
,
and
unlatch
and
pull
forward
one
of
the
rails
in
the
sides
of
the
cubicle
.
14
.
Further
clockwise
rotation
of
the
racking
handle
causes
the
breaker
to
travel
to
the
connected
position
,
which
also
will
be
shown
on
the
indicator
in
the
equipment
compartment
.
During
this
phase
of
the
racking
operation
,
the
spring
-
loaded
fingers
of
the
primary
disconnects
on
the
breaker
will
en
-
4
.
Raise
the
breaker
until
the
rail
pins
in
the
breaker
sides
are
a
few
inches
above
the
slots
in
the
extended
rail
.
i
6
Courtesy of NationalSwitchgear.com

Power
Circuit
Breakers
,
GEK
-
7310
gage
the
stationary
bar
in
the
equipment
enclosure
.
The
opening
of
these
fingers
against
the
force
of
the
springswill
cause
a
noticeably
higher
load
require
-
ment
in
the
racking
effort
.
This
will
very
quickly
fall
off
to
a
lesser
force
requirement
to
the
end
of
travel
,
at
which
point
a
stop
will
be
encountered
.
About
three
handle
turns
will
be
required
between
the
peak
force
requirement
and
reaching
the
stop
which
ends
the
movement
.
Upon
reaching
the
stop
,
the
handle
should
be
removed
without
any
rever
-
sal
of
the
handle
motion
.
Approximately
24
turns
on
the
handle
are
required
for
the
complete
rack
-
ing
cycle
.
15
.
The
first
time
the
breaker
is
introduced
into
the
enclosure
,
it
should
be
completely
withdrawn
and
the
marks
of
the
disconnect
fingers
on
the
grease
on
the
stationary
bars
examined
.
These
tracks
marks
should
indicate
no
less
than
1
/
4
-
inch
engagement
.
The
maximum
amount
that
can
be
attained
is
9
/
16
-
inch
.
ers
.
They
should
be
situated
so
that
they
can
be
easily
reached
for
operation
and
maintenance
,
with
enough
surrounding
free
space
so
that
working
in
the
area
is
not
troublesome
.
If
it
is
possible
,
the
location
chosen
should
be
dry
and
clean
and
not
sub
-
ject
to
extreme
variations
of
temperature
.
m
Mounting
the
breaker
involves
bolting
the
frame
of
the
breaker
to
its
supporting
structure
within
the
switchboard
or
enclosure
,
making
power
connec
-
tions
to
the
breaker
studs
,
and
making
control
power
connections
to
the
breaker
terminal
board
and
aux
-
iliary
switch
terminals
,
if
these
are
required
.
Four
mounting
holes
are
required
for
the
hardware
which
fastens
the
frame
to
its
support
.
These
mounting
holes
must
all
be
in
the
same
vertical
plane
.
If
they
are
not
,
strain
may
be
im
-
posed
on
the
breaker
structure
which
could
ad
-
versely
affect
the
operation
of
the
breaker
.
The
outline
drawing
which
is
furnished
with
the
breaker
gives
information
on
preparing
a
mounting
structure
and
a
cover
or
door
suitable
for
preventing
access
to
live
parts
of
the
breaker
.
BREAKER
WITHDRAWAL
1
.
Trip
the
breaker
open
,
hold
in
the
trip
but
-
ton
,
and
move
the
sliding
cover
in
the
escutcheon
aside
to
the
right
.
Another
requirement
of
the
supporting
structure
for
the
breaker
is
that
it
be
rigid
enough
to
with
-
stand
the
forces
that
result
from
high
momentary
and
short
-
circuit
currents
to
which
the
breaker
may
be
subjected
.
Connectingbus
or
cable
must
also
be
supported
adequately
to
resist
these
forces
.
Joints
of
support
for
buswork
or
cable
must
be
close
enough
to
the
breaker
so
that
no
appreciable
strain
is
imposed
on
the
breaker
’
s
studs
.
f
2
.
Engage
the
racking
handle
and
crank
in
a
counterclockwise
direction
.
I
3
.
Approximately
24
turns
of
the
handle
will
complete
the
racking
-
out
operation
and
bring
the
breaker
to
the
disconnected
position
.
This
will
be
shown
on
the
indicator
in
the
compartment
and
will
be
evident
to
the
person
operating
the
mechanism
because
a
stop
will
be
encountered
beyond
which
no
further
movement
can
be
made
.
Towards
the
end
of
the
racking
cycle
,
the
"
closing
spring
interlock
"
will
be
activated
.
This
will
cause
the
closing
spring
to
discharge
,
but
will
not
close
the
breaker
.
Manual
breakers
must
be
located
so
that
clear
-
ance
is
provided
for
the
sweep
of
the
handle
when
it
is
operated
.
This
requirement
will
be
11
inches
to
the
right
from
the
centerline
of
the
breaker
,
or
2
-
1
/
2
inches
beyond
the
right
edge
of
the
breaker
frame
.
Since
each
upper
stud
of
the
breaker
is
composed
of
two
separate
members
,
the
connections
to
the
stud
must
provide
a
solid
connection
across
the
two
parallel
stud
members
,
as
well
as
an
external
con
-
nection
.
All
stationary
breakers
will
be
shipped
with
connector
bars
already
fastened
to
both
upper
and
lower
studs
.
These
bars
will
accommodate
cable
connectors
or
busbars
.
If
an
external
bar
connects
across
both
halves
of
the
upper
studs
,
the
connector
bars
may
be
dispensed
with
.
In
this
case
,
the
end
of
the
connecting
bus
should
extend
in
to
-
wards
the
breaker
base
no
more
than
5
/
8
-
inch
be
-
yond
the
centerline
of
the
fastener
hole
.
4
.
To
withdraw
the
breaker
completely
,
open
the
latches
on
the
ends
of
the
rails
,
and
pull
the
breaker
out
of
the
compartment
.
The
breaker
may
now
be
lifted
off
the
rails
by
the
lifting
device
.
<
STATIONARY
BREAKERS
Stationary
breakers
are
intended
for
separate
mounting
on
a
framework
or
switchboard
panel
,
or
in
an
enclosure
of
the
customer
'
s
own
design
and
construction
.
They
are
the
same
breaker
unit
as
the
drawout
type
;
however
,
they
do
not
have
the
drawout
features
,
namely
,
the
racking
mechanism
and
automatic
disconnects
and
interlocks
.
Control
connections
on
stationary
breakers
are
made
to
a
terminal
board
located
in
the
upper
left
front
area
of
the
breaker
(
front
view
)
.
The
terminal
board
may
have
6
,
10
or
14
points
.
This
will
be
governed
by
the
requirements
of
the
control
scheme
.
X
Careful
consideration
should
be
given
to
the
se
-
lection
of
a
location
for
mounting
stationary
break
-
7
Courtesy of NationalSwitchgear.com

GEK
-
7310
,
Power
Circuit
Breakers
I
move
in
(
’
’
wipe
"
)
at
least
1
/
16
inch
.
If
they
do
not
seem
to
do
so
,
and
careful
measurement
confirms
this
,
refer
to
the
section
of
these
instructions
en
-
titled
"
CONTACT
MAINTENANCE
.
"
If
the
breaker
has
an
auxiliary
switch
,
external
connections
may
be
made
directly
to
the
terminals
of
the switch
.
PRE
-
SERVICE
CHECK
5
.
Make
sure
that
all
the
devices
used
for
trip
-
ping
the
breaker
open
are
operable
.
Manually
ac
-
tivate
these
with
the
breaker
closed
to
establish this
.
Devices
in
this
category
are
the
manual
trip
,
the
overload
devices
,
the
shunt
trip
,
and
the
under
-
voltage
device
.
Before
putting
the
breaker
into
service
for
the
first
time
,
it
would
be
well
to
make
a
cursory
ex
-
amination
and
a
preliminary
check
of
the
operation
of
the
breaker
.
This
may
be
carried
out
with the
breaker
on
a
workbench
or
on
the
extended
rails
of
an
equipment
drawout
compartment
.
The check
should
consist
of
the
following
:
1
.
Attach
the
drawout
racking
handle
to
the
shaft
on
the
breaker
after
pushing
the
trip
button
and
slid
-
ing
the
cover
aside
.
Turn
the handle clockwise
un
-
til
it
stops
.
This
will deactivate
the
various
inter
-
locks
which
otherwise
would
keep
the
breaker
from
closing
.
6
.
If
the
breaker
is
a
drawout
breaker
,
check
the
operation
of
the
interlock
devices
.
Make
sure
that
lifting
interlock
pin
(
3
)
,
Fig
.
4
,
will
trip
the
breaker
and
that
the
sliding
cover
(
1
)
,
Fig
.
8
can
-
not
be
opened
if
the
breaker
is
closed
.
Check
that
the
closing spring
will
discharge
automatically
if
it
is
charged
,
and
the
drawout
racking
handle
is
cranked
as
far
as
itwillgo
in
the
counterclockwise
direction
.
NOTE
:
Remember
,
later
,
that this
me
-
chanism
must
be
set
back
to
its
original
position
before
the
breaker
can
be
in
-
serted
in
the
equipment
.
7
.
Replace
the
arc
quenchers
,
clamping
them
securely
.
8
.
The
electrical
operation
of
electrical
break
-
ers
should be
checked when
control
power
is
avail
-
able
,
with the breaker
in
the
"
test
"
position
in
the
drawout
equipment
compartment
.
2
.
Remove
the
arc
quencher
from
each
pole
and
examine
it
for
the
possibility
of
broken
or
missing
parts
.
Do
not
replace
the
arc
quenchers
until
after
the
preliminary
examination
is
completed
.
I
tit
3
.
Charge
the
closing
spring
.
If
the
breaker
is
manually
operated
,
turn
the
handle
counterclockwise
as
far
as
it
will
go
(
140
degrees
)
,
then
reverse
the
motion
and
return
it
to
the
vertical
position
.
If
the
breaker
is
electrically
operated
,
use
the
mainte
-
nance
handle
,
Fig
.
5
,
to
turn
the
camshaft
which
charges
the
closing
spring
.
OPERATING
THE
BREAKER
A
breaker
may
be
equipped
to
operate
either
manually
or
electrically
.
Both
types
of
operation
result
in
the
same
fast
-
closing
movement
as
far
as
the
contact
action
is
concerned
.
The
variation
is
in
the
way
energy
is
stored
in
the
closing spring
,
and
how
it
is
released
.
NOTE
:
It
probably
will
be
necessary
to
align
the
triangular
socket
in
the handle
to
make
it
go
on
the
end
of
the
shaft
.
MANUAL
CLOSING
Manually
operated
AKR
breakers
are
constructed
with
front
-
mounted
handles
.
Handle
operation
re
-
sets
the
mechanism
and
fully
charges
the
closing
spring
.
A
complete
charge
is
accomplished
in
either
cranking
the
handle
through
one
cycle
(
135
-
degree
swing
)
or
three
cycles
(
50
-
degree
swing
)
.
The
CLOSE
button
,
mounted
on
the escutcheon
,
is
used
to
close
the
breaker
contacts
and
the
TRIP
button
to
open
them
.
/
4
.
Close
the
breaker
.
The
manual
breaker
is
closed
by
pushing
the
CLOSE
button
in
the
escutch
-
eon
.
The
"
quick
-
close
"
electrical
breaker
may
be
closed
by pulling
forward
on
the
armature
of
the
closing
solenoid which
is
located
beneath
the
me
-
chanism
and
may
be reached
through
the
large
rec
-
tangular
opening
in
the
lower end
of
the
escutcheon
.
This
may
be
done
safely
since
none
of
the
parts
that
move
in
closing
are
in
this
area
.
(
See
Fig
.
6
A
.
)
If
equipped
with
a
closing
solenoid
,
a
manual
breaker
may
be closed
remotely
by
a
control
switch
or
relay
.
Before
this
can
be
done
,
however
,
the
Observe
the
difference
between
the
position
of
the
stationary
contacts
when
the
breaker
is
opened
and
when
it
is
closed
.
The
main
contacts
should
J
8
Courtesy of NationalSwitchgear.com

Power
Circuit
Breakers
,
GEK
-
7310
4
I
1
Fig
.
4
.
(
8041848
)
Breaker
with
barriers
and
arc
quenchers
removed
«
Fig
.
5
.
(
8041831
)
Using
maintenance
handle
to
turn
camshaft
Courtesy of NationalSwitchgear.com

GEK
-
7310
,
Power
Circuit
Breakers
I
closing
spring
has
to
be
charged
by
hand
.
The
closing
solenoid
is
an
optional
accessory
and
is
not
supplied
unless
specified
in
the
breaker
order
.
6
ELECTRICAL
CLOSING
Applying
control
power
immediately
energizes
the
closing
motor
on
electrical
breakers
.
Cutoff
of
the
motor
circuit does
not
occur
until
after
the
spring
is
completely
charged
and
overcenter
.
The
spring
is
mechanically
held
from
discharging
until
the
closing
circuit activates
a
solenoid
which
re
-
leases
the
holding
latch
.
A
push
-
button
closing
switch
may
be
provided
on
electrical breakers
.
This
feature
,
however
,
is
pro
-
vided
only
if
specified
in
the
breaker order
.
If
sup
-
plied
,
it
is
located
in
the
right
side
of
the escutcheon
.
When
in
service
,
all
electrical
breakers
are
closed
either
by energizing
the
closing
circuit
re
-
motely
,
or
at
the
breaker
location
by
operation
of
the
push
button
switch
in
the
escutcheon
(
if
the
breaker
is
so
equipped
)
.
:
o
^
T
3
V
\
*
/
lye
Jr
)
)
>
•
—
'
5
2
3
4
8
Fig
.
6
A
.
(
227
A
8290
)
Closing
spring
interlock
•
'
SN
r
*
i
>
—
i
/
OPINING
THE
BREAKER
A
closed breaker
will
open
(
trip
)
whenever
the
trip
latch
(
11
)
,
Fig
.
12
,
is
moved
off
the
roller
on
the
secondary
latch
(
14
)
.
A
number
of
trip
paddles
are
mounted
on
the
trip
shaft
,
one
for
each
tripping
device
.
I
i
)
Ni
«
0
*
~
\
INTERLOCKS
9
10
Some
interlock
devices
are
required
by Industry
Standards
and
Certifying
Authorities
;
others
are
optional
and
intended
only
for
special
applications
.
The
standard
interlock
devices
described
in
the
fol
-
lowing
paragraphs
are
used
only
on
drawout
break
-
ers
.
Stationary
breakers
have
no
required
inter
-
locks
.
6
.
Roller
on
Ratchet
7
.
Closing
Spring
8
.
Adjustable
Link
9
-
Blocking
Plate
10
.
Sliding
Cover
1
.
Racking
Arm
2
.
Crank
3
.
Lever
4
.
Spring
Release
Lever
5
.
Closing
Solenoid
Fig
.
6
B
.
(
227
A
8289
)
Blocking
plate
0
)
CLOSING
SPRING
INTERLOCK
(
FIGS
.
6
A
AND
6
B
)
Closing
spring
interlocks
help
to
provide
pro
-
tection
against
the
hazard
of
a
completely
charged
and
overcenter
spring
being
accidentally
released
after
the
breaker
has
been
withdrawn
from
its
en
-
closure
.
Drawout
breakers
have
their
closing
springs
fully
charged
prior
to
closing
and
thus
re
-
quire
this
safety
feature
.
through
connecting linkage
,
causes
lever
(
3
)
to
ro
-
tate
clockwise
,
acting against
the
closing
spring
re
-
lease lever
(
4
)
.
This
is
the
same
lever
which
is
operated
by
the
closing
solenoid
(
5
)
.
When
the
closing
spring
is
automatically
dis
-
charged
by
the
interlock
,
it
does
not
cause
the
breaker
to
close
.
The
contact
arms
remain
mo
-
tionless
because
the
mechanism
is held
"
trip
-
free
"
by
plate
(
9
)
,
Fig
.
6
B
,
which
blocks
the
return
of
the
sliding
cover
(
10
)
to
its
normal
position
unless
Figure
0
A
shows
how the
interlock
is
activated
by
the
racking
mechanism
.
As
racking
arm
(
1
)
approaches
the
"
disconnect
"
position
,
crank
(
2
)
,
10
Courtesy of NationalSwitchgear.com