GE AK-50 Series - Breaker Accessories; Primary Disconnects; Secondary Disconnects

GEK
-
7303
Low
Voltage
Power
Circuit
Breakers
For
the
exact
characteristics
and
setting
of
each
breaker
in
a
selective
system
,
reference
should
be
made
to
the
coordination
chart
furnished
for
the
particular
system
.
The
primary
disconnects
should
always
be
kept
lubricated
with
G
„
E
0
Co
.
D
50
H
47
grease
.
SECONDARY
DISCONNECTS
The
secondary
disconnects
for
all
breakers
serve
as
connections
between
breaker
control
cir
-
cuit
elements
and
external
control
circuits
.
They
are
are
used
only
on
drawout
breakers
and
are
mounted
on
a
horizontal
cross
-
channel
at
the
top
rear
of
the
breaker
.
A
terminal
board
serves
the
same
purpose
on
stationary
mounted
and
general
purpose
enclosure
mounted
breakers
.
These
secondary
disconnects
allow
removal
of
the
breaker
without
the
necessity
of
having
to
detach
external
connections
.
BREAKER
ACCESSORIES
PRIMARY
DISCONNECTS
AK
-
50
ONLY
The
primary
disconnects
are
attached
to
the
circuit
breaker
studs
at
the
rear
of
the
breaker
base
.
Each
disconnect
assembly
consists
of
four
pairs
of
opposed
contact
fingers
,
fingers
are
secured
to
the
breaker
stud
by
two
bolts
which
pass
through
the
assembly
and
the
stud
of
the
enclosure
,
the
disconnect
fingers
exert
a
set
amount
of
force
against
the
stationary
stud
through
the
action
of
the
compression
springs
.
Retainers
and
spacers
hold
the
contact
fingers
in
correct
alignment
for
engagement
with
the
stud
.
The
amount
of
force
which
the
fingers
exert
against
the
stud
is
determined
by
the
degree
to
which
the
springs
are
compressed
by
the
bolt
and
nut
which
hold
the
assembly
together
.
REPLACEMENT
If
for
any
reason
the
disconnects
must
be
replaced
or
removed
,
the
position
of
the
nuts
on
the
bolts
should
be
carefully
noted
and
the
number
of
turns
of
the
nuts
should
be
counted
,
so
that
in
reassembly
the
original
amount
of
compression
can
be
restored
by
replacing
the
nuts
to
their
former
position
on
the
bolts
.
The
contact
The
movable
part
of
the
secondary
disconnects
consists
of
an
insulating
body
which
holds
a
conducting
spring
-
loaded
plunger
to
which
a
flex
-
ible
lead
is
attached
,
into
its
enclosure
,
the
plunger
is
depressed
by
sliding
onto
the
stationary
disconnects
of
the
enclosure
.
As
the
breaker
moves
REPLACEMENT
1
.
Unfasten
disconnect
body
from
breaker
cross
-
channel
.
2
.
Open
tabs
which
hold
wires
on
inner
side
.
Pull
contact
tip
loose
from
hollow
tube
.
Remove
contact
tip
by
cutting
wire
at
its
base
.
3
.
4
.
42
Courtesy of NationalSwitchgear.com