Powell 38PV40ARMM-4, Инструкционный бюллетень

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17 Equipment Description
01.4IB.65131
e. Control Circuit
The typical electrical control scheme
is shown in Figure 8 . The control
scheme of any particular circuit breaker
may differ from this typical scheme
depending on the user’s requirements,
operating solenoids, and the control
devices furnished with that circuit
breaker.
The sequence of operation for all
control schemes is shown in
Figure 7 . Circuit breaker mounted
auxiliary contacts not used in the
control circuit are brought out for
control and indication functions. The
metal-clad switchgear equipment
may provide a circuit breaker MOC
(Mechanism Operated Cell Switch) for
additional contacts.
c. A
utoMAtIc
r
AckInG
M
echAnISM
1) General Description
The racking mechanism is the mechanical
assembly that facilitates moving the
circuit breaker between the breaker
test/disconnect and the connected
positions in the circuit breaker
compartment. The main racking
mechanism components for the
PowlVac 38 ™ Automatic Racking
Mechanism (ARM) Vacuum Circuit Breaker
are shown and described in the following
sections:
a. Breaker Position Indicator
The breaker position indicator
(Figure 1, f) is visible through an
opening in the circuit breaker front
cover. The indicator displays whether
the circuit breaker is in the connected
or the test/disconnect positions. When
the breaker position indicator displays
“BREAKER CONNECTED”
, and this is
fully visible in the aperture, the
circuit breaker is in the connected
position. When the breaker
position indicator displays
“BREAKER TEST/DISCONNECTED”
,
and this is fully visible in the aperture,
the circuit breaker is in the
test/disconnected positions. If the
breaker position indicator does not
display an indication the circuit breaker
is in between positions. Refer to
Ch 4 Installation, E. Inserting the
Circuit Breaker into the Circuit Breaker
Compartment for more information.