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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.
JL--
1J_-
Jl-
-LJ-
j-rr
xrnowrne
-
FOR
AI{CHOR]
FlG.
l8
(0121C1508) Side
view
of
breqker
stock
23
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