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Instruction manual
| Types SDV-R and SDV-R-AR distribution circuit breakers
Manual spring-charging check
1. Insert the manual spring-charging crank
into the manual charge socket as shown
in Figure 15: Use of manual spring-
operation crank on page 28. Turn the
crank until the spring-condition indicator
shows the closing springs are charged,
and remove the spring charging crank
from the socket.
2. Repeat the spring-discharge check
presented on page 17.
3. Verify the springs are DISCHARGED and
the circuit breaker primary contacts are
OPEN by observing the indicator
positions.
As-found and vacuum check tests
Perform and record the results of both the
as-found insulation test and the vacuum
check high-potential test. Procedures for
these tests are described in the maintenance
section of this instruction manual.
Automatic spring-charging check
Note:
A temporary source of control power
and test leads may be required if the control
power source has not been connected to the
circuit breaker. Refer to the specific wiring
information and rating label for your circuit
breaker to determine the voltage required and
where the control voltage signal should be
applied.
When control power is connected to the circuit
breaker, the closing springs should
automatically charge if the control power
disconnect is closed.
1. Close the control power disconnect
device to energize the circuit breaker
control circuit. If not previously charged,
the closing spring should charge
automatically.
2. Use the manual close and open controls
on the circuit breaker operating
mechanism (refer to Figure 9: Operator
panel controls of circuit breaker and
manual charging of closing on page 23)
to first close and then open the circuit
breaker contacts. Verify the main contact
positions visually by observing the OPEN/
CLOSED indicator on the circuit breaker.
3. Verify that the closing springs are
CHARGED by observing the indicator
position.
4. Repeat the manual-spring discharge
check.
5. Verify the springs are DISCHARGED and
the SDV-R circuit breaker primary
contacts are OPEN by observing the
indicator positions.
