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3. SecoGear Construction
This section describes GE SecoGear Medium Voltage
Switchgear, along with the functions of the electrical and
mechanical systems. Figure 3-1 contains a typical side view of
dual feeder section, showing the major isolated compartments
as well as circuit breakers, CTs, and optional Surge Arrestors.
The switchgear consists of modules containing circuit breakers
and auxiliary equipment, which are stacked two high to form
vertical sections. Sections are arranged side by side and
connected mechanically and electrically to form complete
switchgear assemblies.
B
B
A = Main Busbar Compartment
B = Circuit Breaker Compartment
C = Cable Compartment
Figure 3-1: Section Contents
C
A
C
Optional Surge Arresters
Circuit Breaker Compartment
The circuit breaker compartment is designed to house GE
SecoVac vacuum circuit breakers. These compartments can be
stacked for two-high switchgear configurations. Each circuit
breaker compartment has two physical positions, CONNECTED
and DISCONNECTED/TEST.
All of the protective devices, metering devices, secondary
control, and control fuses are located in the front area of the
circuit breaker compartment or they are located on the front
compartment door.
The compartment includes guide rails, stationary primary
contacts, automatic shutters, interlocks, MOC and TOC switches
and necessary control and indicating devices.
Window-type current transformers for protection and metering
circuits are mounted on the insulated bushings containing the
fixed primary contacts.
Closed-door Drawout
Closed-door drawout is a standard construction feature on
all circuit breaker compartments (Figure 3-2). The circuit
breaker compartment doors remain closed and latched while
the circuit breaker is racked to or from the CONNECTED and
DISCONNECTED/TEST positions.
SecoGear – Installation, Operation and Maintenance Manual 16 of 56
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