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20
PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
Equipment Description
Figure 11
Test Plug Jumper Interlock
a. Test Plug Interlock Device
b. Compartment Mounted Test Umbilical
Receptacle
c.
Male End of Test Plug Jumper
d. Female End of Test Plug Jumper
e.
Test Plug Disconnect Latch
T
Pl
I
l
k D i
a
b
c
d
e
2) Circuit Breaker Racking Mechanism
The compartment mounted circuit breaker
racking mechanism enables moving the
circuit breaker to one of two positions in
the compartment of the switchgear:
TEST/DISCONNECTED, and CONNECTED.
a) Test/Disconnected
Position
In the TEST/DISCONNECTED
position,
the primary disconnect devices are
disengaged and the shutters are
closed. The secondary devices may
be connected so the breaker may be
electrically or manually operated.
While in the TEST/DISCONNECTED the
test plug interlock device ensures that
the circuit breaker cannot be moved to
the CONNECTED position or removed
from the compartment while the test
plug jumper in place.
b) Connected Position
In the CONNECTED
position, the
movable primary disconnects and
stationary primary disconnects are
engaged, the shutters are open, and
the compartment mounted secondary
disconnect receptacle
(Figure 3, g) control contacts are
completed (Figure 12).
Figure 12
Secondary Disconnect Receptacle
and Secondary Disconnect Device
Completed
D. C
IRCUIT
B
REAKER
C
OMPARTMENT
I
NTERFACES
1) Primary Disconnecting Contacts
There are six primary disconnecting
contacts on the circuit breaker. They are
arranged, two per phase, with the upper
