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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
Equipment Description
F.
O
PERATING
S
OLENOIDS
The closing coil solenoid (Figure 7, o), located
under the mechanism, is attached to the
breaker bottom pan by two screws accessible
from underneath the breaker.
The primary shunt trip solenoid (Figure 7, a) is
to the left of the mechanism and is supported
from the upper frame channel.
Either a second shunt trip solenoid or an
undervoltage trip device may be furnished
as an option. When furnished, either of
these devices is located to the right of the
mechanism and is supported from the lower
frame channel. Only one of these two auxiliary
trip devices may be furnished on any one
circuit breaker, as both types are located in the
same space.
G.
A
NTI
-P
UMP
R
ELAY
The anti-pump relay is located on the breaker
frame to the right of the spring channel and is
held by two screws (Figure 6, b).
H.
M
OTOR
C
UTOFF
S
WITCH
The motor cutoff switch, which is located at
the right of the mechanism, is attached to a
bracket which is bolted to the circuit breaker
(Figure 7, t).
I.
V
ACUUM
I
NTERRUPTERS
For a listing of the vacuum interrupters used
in Type ASD circuit breakers, see
Table C,
Primary Current Path
. A label that shows the
part number is attached to each vacuum
interrupter. Replacement vacuum interrupters
must have the same part number as the
original vacuum interrupter.
J. S
HUTTER
O
PERATOR
The circuit breaker travels between the
test/disconnected and connected positions
as the racking mechanism is turned. This
action also drives the compartment shutters
(Figure 2, d) to open/close which allows the
primary disconnecting devices to connect or
disconnect.
K. T
EST
P
OSITION
I
NTERLOCK
The circuit breaker is equipped with a test
position interlock (Figure 1, p) which prevents
inadvertent removal from the circuit breaker
compartment by engaging a block in the
circuit breaker compartment.
