GE AK-1-15 Series - Page 20

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.
•
r
'
TW
'
fW
PAGE
04
!
aEH
-
1807
Air
Circuit
Breakers
Type
AK
»
1
~
1
B
IHHI
AK
-
1
-
2
G
’
’
Drop
out
'
;
and
aubsaquent
tripping
of
Uw
breaker
is
a
ivnctiori
of
the
tonmion
of
ruffing
(
4
)
,
TM
#
in
a
factory
adjustment
.
It
should
,
necasaary
to
ever
react
tlda
adjustment
in
the
REPLACEMENTS
,
TO
.
10
&
not
be
Li
The
only
part
of
the
uadervolt
&
gedevice
that
in
field
,
likely
to
require
replacement
during
the
life
of
the
breaker
i
$
the
coil
(
lB
)
.
The
replAceimentprocedure
follows
;
INSTANTANEOUS
MNDEKVOLTAGE
TRIPPING
DEVICE
1
.
Disconnect
coll
leads
.
,
,
,
,
.
,
.
?
„
Remove
two
screws
(
10
)
*
freeing
magnet
This
uncle
rVoltage
tripping
device
la
constructed
(
14
)
and
coll
(
16
)
from
device
.
(
It
may
be
similarly
to
tile
Umo
delay
imdervoltagc
tripling
more
convenient
to
remove
the
entire
device
device
with
Lite
exception
th
&
t
the
cylinder
x
-
.
„
from
its
nupporting
bracket
(
23
)
before
plunger
(
12
)
,
connecting
rod
(
U
)
,
clevis
(
7
)
,
bracket
removing
the
magnet
and
coil
*
If
the
device
(
1
)
»
and
adjusting
nut
(
ft
)
,
afi
shown
In
Fig
.
10
are
is
of
the
time
-
delay
tvoe
.
bracket
U
)
will
omitted
,
also
have
to
be
remove
/
before
the
device
time
“
delay
type
,
bracket
(
l
)
will
to
bo
removed
from
bracket
(
3
J
;
8
)
,
)
3
.
Straighten
laminations
which
were
bent
to
lace
.
O
The
adjustments
and
replacements
for
this
device
arc
also
the
same
as
those
for
the
time
delay
uuderveltage
tripping
device
.
hold
shading
ring
(
5
)
in
i
>
4
.
Remove
shading
ring
(
Bj
*
5
.
Straighten
end
of
coil
clamp
(
13
)
*
6
.
Remove
coil
,
install
new
coil
*
and
assemble
device
by
reversing
disassembly
procedure
.
(
Note
;
-
It
is
advisable
to
re
*
place
,
the
taaguet
and
coil
assembly
ao
nearly
as
jjosstele
In
its
exact
original
position
in
relation
to
the
device
frame
.
Before
removing
the
magnet
,
note
or
mark
its
position
relative
to
the
frame
.
Doing
this
will
result
in
having
the
name
open
air
gap
between
armatur
e
and
magnet
and
Will
Insure
the
device
’
s
picking
up
at
the
same
voltage
value
)
*
SERIES
OVEItqURRJENT
TRIPPING
DEVICE
Thorn
arc
two
types
of
over
our
rent
trip
devices
Willi
which
the
1
breaker
may
be
equipped
.
These
arc
the
KOI
and
the
EC
-
2
devices
.
The
principal
difference
between
those
two
is
that
the
former
may
have
time
’
delay
characteristics
which
Include
a
short
;
time
Maly
.
The
hitter
IB
used
Only
for
long
time
delay
and
instantaneous
characteristics
,
or
combinations
'
of
those
two
.
For
a
description
ox
the
operation
;
and
adjustments
of
the
EC
-
2
device
,
refer
to
bxslructlem
Book
GEI
-
B
021
G
,
•
i
Each
series
overcurrent
tripping
device
is
enclosed
in
a
molded
case
and
mounted
by
three
screws
and
a
bracket
to
the
lower
part
of
the
polo
unit
base
.
.
#
device
if
the
entire
device
is
replaced
,
simply
remove
hardware
fastening
the
frame
of
the
device
to
supporting
bracket
(
23
)
.
if
a
time
-
delay
device
bracket
(
l
)
must
also
bo
removed
from
(
$
8
)
«
.
the
>
j
The
EC
-
j
-
lj
device
can
be
provided
with
the
following
tripping
combinations
}
ADJUSTMENTS
1
.
Long
time
delay
,
short
time
delay
and
instantaneous
tripping
.
2
.
X
<
png
time
and
snort
time
delay
tripping
only
.
.
>
8
.
Long
itjlmc
delay
and
huriantsmeoxm
tripping
-
4
.
Short
time
delay
and
instantaneous
tripping
*
5
.
Short
tiJm
delay
tripping
only
.
C
.
Instantonemw
tripping
,
(
a
)
’
Adjustable
:
(
b
;
!
Noimdjustablo
SHORT
TIME
BELAY
TRIPPING
,
FIG
.
17
When
the
armature
(
3
)
is
open
,
(
coil
deeper
-
it
must
push
the
trip
paddle
(
82
)
at
least
of
an
^
Inch
beyond
the
point
at
which
tee
breaker
tripe
.
This
may
be
checked
by
placing
a
1
/
32
"
feeler
gauge
between
the
armature
and
tee
head
of
screw
(
2
)
with
the
breaker
;
position
and
tee
ajr
maters
held
closed
against
the
magnet
When
the
armature
is
released
,
it
should
move
under
the
action
of
spring
(
4
)
just
far
enough
tc
;
trip
the
breatar
.
Tills
will
ensure
positive
tripping
of
tee
breaker
by
tiie
device
.
Adjustment
is
obtained
by
means
of
screw
(
20
)
which
may
be
advanced
towards
the
armature
or
retarded
.
88
»
In
the
closed
#
The
armature
(
7
)
is
retained
by
calibrating
spring
(
8
)
,
After
the
magnetic
force
,
produced
by
The
armature
pickup
point
is
a
function
of
tee
an
overcurrent
condition
,
overcomes
this
restrain
-
open
air
gap
of
the
armature
.
The
air
gap
is
set
;
by
tag
force
,
the
ifromturo
movement
is
further
means
of
adjusting
screw
(
2
)
*
This
gap
should
he
tainted
by
an
escapement
mechanism
which
produces
set
so
that
the
armature
will
"
pick
up
"
at
80
%
of
an
inverse
time
delay
characteristic
.
The
mocha
*
rated
voltage
*
In
order
to
check
tide
adjustment
,
a
nism
Is
shown
in
tec
left
side
view
of
Fig
,
17
.
variable
voltage
source
is
necessary
.
The
;
gap
.
;
Should
Jbe
inoreawed
if
"
pick
ujp
"
occurs
at
lmu
The
pickup
lor
tela
device
can
be
field
out
4
h
^
30
n
80
%
of
voltage
or
decreased
if
it
occurs
at
between
ftmlta
liaving
a
ratio
of
2
-
1
/
2
to
1
in
the
w
more
than
80
%
.
range
of
200
to
1000
%
Of
tte
coil
rating
*
20
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