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Installation of type
SDV7-SE circuit
breaker with stored-
energy operator
Introduction
This section provides a description of the
inspections, checks and tests to perform on
the type SDV7-SE-AR distribution circuit
breaker prior to operation.
Inspections, checks and tests without
control power
Type SDV7-SE-AR vacuum circuit breakers are
normally shipped with the primary contacts
open 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.
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.
De-energizing control power in a power
circuit breaker
To de-energize the control power, open the
disconnect device in the relay and control
compartment. Figure 6: Relay and control and
operator compartments for type SDV7-SE-AR
circuit breaker with stored-energy operator on
page 19 presents the location of this
disconnect in a standard type SDV7-SE-AR
distribution circuit breaker.
The disconnect means shown in the photo
are knife switches with fuses. Molded-case
circuit breakers or pullout type fuse holders
can be furnished instead when specified.
The control power disconnect device is
located on the control panel in the relay and
control compartment.
17
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