GE AK-1-15 Maintenance Instructions

GEK
-
7303
Low
Voltage
Power
Circuit
Breakers
I
*
I
I
J
1
2
a
Figo
5
(
8019408
)
Disassembled
arc
quencher
-
AKF
outer
poles
.
1
.
Muffler
Assembly
2
.
Spacer
Block
3
o
Inner
Barrier
4
.
Cap
5
.
Intermediate
Barrier
6
.
Outer
Barrier
7
.
Side
Plate
Steel
springs
(
5
)
shunt
travel
of
the
contacts
,
the
pivot
pin
to
prevent
possible
pitting
at
the
pivot
point
when
interrupting
high
currents
.
On
earlier
model
breakers
flexible
braid
leads
were
used
.
In
order
to
function
properly
,
a
definite
amount
of
contact
pressure
and
contact
wipe
must
exist
between
the
movable
and
stationary
contacts
.
Table
I
gives
the
figures
for
contact
pressure
and
contact
wipe
.
Both
wipe
and
pressure
should
be
checked
during
the
regular
inspection
period
.
MEASURING
CONTACT
WIPE
(
Fig
.
6
)
1
.
Remove
arc
quenchers
(
see
REPLACEMENT
under
ARC
QUENCHER
)
.
2
.
With
the
breaker
open
,
measure
the
hori
-
zontal
distance
from
the
edge
of
the
stationary
contact
to
the
stationary
block
behind
it
.
(
"
B
”
dim
.
for
arcing
contacts
,
”
C
"
dim
.
for
main
contacts
)
.
The
movable
arcing
-
contact
assembly
consists
of
parallel
contact
arms
(
4
)
carried
on
two
mov
-
able
pivot
pins
(
8
)
and
(
19
)
.
The
arcing
contacts
interleave
the
main
contacts
and
pivot
with
them
about
pin
(
19
)
.
This
relative
motion
is
obtained
by
linkages
from
the
upper
pin
(
7
)
to
the
breaker
mechanism
.
The
stationary
main
contact
assembly
includes
main
and
intermediate
contacts
.
The
intermediate
-
contact
surface
extends
beyond
the
main
contacts
and
will
,
therefore
,
make
before
the
main
contacts
and
break
after
the
main
contacts
.
The
number
of
contacts
for
each
breaker
rating
is
given
in
Table
I
.
Close
the
breaker
and
repeat
item
2
.
The
difference
between
the
readings
in
items
2
and
3
determines
the
wipe
of
the
contacts
.
For
safety
reasons
be
extremely
careful
not
to
trip
the
breaker
.
3
.
The
movable
main
contacts
pivot
around
a
stationary
pin
(
18
)
,
which
holds
them
to
the
lower
block
.
Motion
is
obtained
from
a
second
pin
(
7
)
,
connected
by
an
insulated
link
(
12
)
to
th
.
e
breaker
mechanism
.
In
addition
to
steel
springs
shunting
the
current
from
the
contact
directly
to
the
lower
contact
block
,
steel
springs
(
17
)
force
the
contacts
against
the
pins
to
prevent
pitting
at
the
pivot
point
.
The
movable
main
contact
assembly
also
contains
main
and
intermediate
contacts
.
MEASURING
CONTACT
PRESSURE
(
Fig
.
6
)
1
.
Remove
arc
quenchers
(
see
REPLACEMENT
UNDER
ARC
QUENCHER
)
.
2
.
Close
the
breaker
and
measure
dimension
”
BTT
.
3
.
Open
the
breaker
.
Place
a
push
-
type
scale
9
Courtesy of NationalSwitchgear.com

GE AK-1-15 Specifications

General

Brand	GE
Model	AK-1-15
Category	Circuit breakers
Language	English