GE AKD-6 - Key Interlocks; Key Interlock Systems for Breakers

low Volfoge Swifchgeor,
GEK-72101
KEY INTERLOCKS
After initial installation
of
the
switchgear equipment, all
necessary
interlock
keys should
be
inserted
into the ap-
propriate
locks and all
spare keys should be
placed
in
the
hands of a responsible
person.
Refer to the key
interlock
schematic included
in
the summary
furnished with the
equipment
to determine
the sequence of
operation and the
correct
number
of operating
keys required.
This
precaution
is necessary
since improper
use of spare keys
will defeat
the interlocking
scheme.
BREAKER
OPERATION TEST
All
compartments
housing all
AK and AI(R circuit
breakers have a
TEST
position,
in
which
the
breaker
pri-
mary contacts are
disconnected
while the secondary con-
tacts
are still
engaged. This
TEST
position permits
complete
testing
of the electrical
control
circuit without energizing
the
primary power
circuit. When
the breaker is first
put
into
service, its
control circuit
must be
thoroughly
tested
while in this
position
to
make
sure
that
all closing
and
tripping circuits
are complete
and functioning
properly,
The
TEST
position
is
not suitable
for inspection
and
mqintenance
of the
breaker, and should
therefore
be
used
only for testing breaker
operation.
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1J_-
Jl-
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xrnowrne
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FOR AI{CHOR]
FlG. l8
(0121C1508)
Side view
of breqker
stock
23