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Instruction manual
| Types SDV-R and SDV-R-AR distribution circuit breakers
Hazardous voltages and high speed moving parts.
Will cause death, serious injury or property damage.
Read instruction manuals, observe safety instructions and use qualified
personnel.
Introduction
This section provides a description of the
inspections, checks and tests to perform on
the SDV-R and SDV-R-AR distribution circuit
breakers prior to operation.
Inspections, checks and tests without
control power
SDV-R and SDV-R-AR vacuum circuit breakers
are normally shipped with the primary
contacts open, the ground switch contacts
closed, and the springs discharged. However,
prior to starting the inspection process, it is
critical to first verify that the control power is
de-energized, the spring-loaded mechanisms
are in the discharged condition and the circuit
breaker main contacts are open.
De-energizing control power
To de-energize the control power, open the
disconnect device in the relay and control
compartment. Figure 7: Relay and control and
operator compartments for type SDV-R-AR
circuit breaker with stored-energy operator on
page 18 presents the location of this
disconnect in a standard type SDV-R or SDV-R-
AR distribution circuit breaker.
The control power disconnect device is
normally a fused knife switch. However, in
some outdoor circuit breakers, a molded-
case circuit breaker or pullout-type fuse
holder may be used in lieu of the fused knife
switch.
Opening the fused knife switch or molded-
case circuit breaker or removing the pullout-
type fuse holder accomplishes the desired
result: control power is disconnected.
Spring-discharge check
The spring-discharge check consists of
simply performing the following tasks in the
order given. This check assures both the
tripping and closing springs are fully
discharged.
1. De-energize control power.
2. Press red OPEN/TRIP button on the
operating mechanism.
3. Press black CLOSE button on the operating
mechanism.
4. Again press red OPEN/TRIP button on the
operating mechanism.
5. Verify spring condition indicator shows
DISCHARGED.
6. Verify main contact status indicator shows
OPEN.
Physical inspections
1. Verify the rating of the circuit breaker is
compatible with the system.
2. Perform a visual shipping damage check.
Clean the circuit breaker of all shipping
dust, dirt, and foreign material.
Inspections, checks and tests
