Inspections, Checks And Tests Without Control Power; De-Energizing Control Power In A Power Circuit Breaker; Installation Of Type Sdv7-Se Distribution Circuit Breaker With Stored-Energy Operator - Siemens SDV7 Instruction Manual

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 distribution circuit breaker
prior to operation.
Inspections, checks and tests without
control power
Type SDV7-SE 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 circuit breaker with stored-energy
operator on page 19 presents the location
of this disconnect in a standard type
SDV7-SE 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.
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