low Voftoge Swifchgeo r, GEK-721 0l
BREAKER
COMPARTMENTS_AKR,
AKRU, AKRT
BREAKERS-MOUNTING
CODE 3A, 4A OR
5A
These
breakers are supported on a rollout track
in
the
same
manner as the
AK breakers. However, since the
rackout mechanism is mounted on the breaker, there are
no
jackshafts
in the
enclosure. See Figure 7. Racking arms
on
both sides of the breaker
frame engage
the drawout
mechanism
pins
fastened to
both sides
of the compartment.
Note
that extra items shown
in Figures 6 and 7
(such
as
secondary
disconnects,
position
switches and
ground
sensor
secondary
disconnects) may appear in any compartment
or not
be included at all,.depending
on the equipment spec-
ified. Also note that
the bracing for the
primary
disconnects
shown in Figure
7 may be a
single
piece
of insulating
material
instead of three separate
pieces.
A stop link is located on
each
side
of
all AK
breaker
compartments.
These
links
prevent
an operator from manu-
ally
pushing
a breaker set
on
the
tracks
all the way into
the compartment
when the racking mechanism is in the
connected
position.
In a compartment made for AKR
breakers, the latches
that
rest
on the drawout
mechanism
pins prevent
the inner house from being manually
moved
all the
way into the compartment when no
breaker is
set on the tracks.
All
AK or AKR
circuit breakers of the
same type
and
SECONDARY
DISCONNECTS
KEY
INTERLOCK
TRACK
LOCK
LINK
ROLLOUT
OPERA
SHAFT
INDICATOR
CURRENT
TRANSFORMER
rating
which
have duplicate wiring may be interchanged.
Each breaker compartment has four
positions.
They are
illustrated in Figure 18
and
described below.
1.
CONNECIED POSIIION-The
breaker
is in operating
position,
both
primary
and secondary
contacts made
and the door
closed.
2.
TESI POSITION-The primary
contacts are separated
by
a safe distance, but the secondary
contacts are
made.
Any
breaker test not involving
power
may
be made
in
this
position.
The door may be
closed in this
posi-
tion,
and must be closed before charging the spring
on a manually operated AKR breaker because an open
door
will
interfere with
the breaker
handle travel.
3.
DISCONNECIED
POSITION-Neither
the
primary
nor the
secondary
contacts
are made, The door
may be closed.
4.
WITHDRAWN
POSITION-The
breaker
is
completely
out
of
its
compartment
ready for removal from the
equipment.
The door must be open.
NOTE:
ALTHOUGH
THE BREAKER
COM.
PARTMENT
DOOR IUTAY BE
OPENED
IN
ANY
POSITIOJV,Ijr IS
RECOMMENDED THAT
THE
DOOR ONLY BE OPENED
WHEN
THE
BREAKER
/S IiY THE DISCOIVJVECT
OR
WITHDRAWN POSITION.
CAUTION:
NEVER
OPEN THE BREAKER
DOOR
WHEN THE BREAKER
'S
CLOSED
AND IN THE
CONNECTED POSITION.
STOP
LINK
ROLLOUT
TRACK
JACK
SHAFT
CHAIN COVER
GROUND
SENSOR
SECONDARY
DISCONNECT
HA,
6
$012645)
Typicol AK
breoker comporlmenl
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