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GEK-731O,
Power Circuit Breqkers
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AUXITIARY
SWITCH
AII
electrically
operated
breakers
and manual
breakers having
shunt
trips are
supplied
with
aux-
iliary
switches.
Depending upon
the
requirements
of the breaker's
application, the switch may
con-
tain from two to
six
stages.
UsuaIIy, each
stage
has one ttAtt contact and one ttBtt
contact.
ttAtt con-
tacts are openedor closed as
the
breaker
is
opened
or
closed.
"B"
contacts
are the reverse of
this.
Drawout breakers have
their
auxiliary
contacts
wired
to
secondary
disconnects;
stationary breakers
may
be
wired directly to the switch terminals.
BELI
AIARM
This
device
is
used
to
give a
remote
indication
of the breaker's
having tripped open through
the
PUSH
IN
TO
DEFEAT
LOCKOUT
action
of
one
of
its
automatic protective devices.
It will
not
be
activated
by
manual
tripping
or
the
action
of
the shunt
trip.
A remotely
mounted
pro-
tective
relay
energizing the
shunt
trip
will
not
re-
sult in
the
remote alarm action.
The bell alarm circuit
may be
turned
off
by
pushing
in
the manual
trip
or by
energizing
the
shunt
trip. In
the
latter
case,
a
normally
open
contact
of the bell alarm switch
must be
wired
in
parallel with the
"A"
auxiliary
switch contact
in
the shunt-trip
circuit.
Closing the
brea-ker
will
also
turn off
the
alarm.
The
bell alarm
device may be equipped with
a
Iockout
iink
which
will
lock the breaker
open
until
the
bell alarm
device
is reset.
The
bell alarm
is
not
a
standard
device
and
is
supplied
only
when
specified
on the
breaker order.
Fig.
lQ.
Q134C2182) Arm.ature holdi.ng
mechanismfor
electric
lockout
deui.ce
t4
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