DET-882
SecoGear Medium-voltage Switchgear Application and Technical Guide
SecoGear Switchgear Concepts and Basic Configurations
©2017 General Electric All Rights Reserved
3
Figure 1-4: Typical Two-High Breakers
SWITCHGEAR STANDARDS
SecoVac VB2+ circuit breakers are rated per IEEE C37.04
and C37.06 standards (Table 1-2). Available ratings are
shown in Table 3-1.
SecoGear switchgear is designed, built, and tested to the
applicable industry standards shown in Table 1-2 and
Table 1-3.
SecoGear equipment is available in NEMA 1 indoor
construction. Typical section outlines for each of the basic
equipment types, along with dimensions and weights are
shown in SECTION 6. “Standard SecoGear Construction,
Features, and Installation.”
Underwriters Laboratories, Inc. (UL)
SecoGear Metal-clad switchgear and associated circuit
breakers are available with the option for UL labeling (File
No. E468553). Device selection and options are all
considerations when providing a UL label. The requirement
for UL labeling must be made known during the bidding
stage and agreed to by GE.
NOTICE
Not all medium-voltage switchgear assemblies
qualify for UL listing.
Service Conditions
SecoGear is designed for the normal service conditions of
indoor switchgear per IEEE Standards:
Temperature
•
Maximum Ambient: 104 °F [40 °C]
•
Minimum Ambient: -22 °F [-30 °C]
Humidity
•
Maximum Relative: 95%
Altitude
•
Maximum: 3300 ft [1000 m] a.s.l.
•
High Altitude: At altitudes above 1000 m, consult
IEEEC27.20.2 for derating factors applicable to
dielectric and current values
Applicable Industry Standards
Table 1-2: Applicable American National Standards
Institute (ANSI) Standards
Standard No. Description
C37.04
Rating Structure for AC High-Voltage Circuit
Breaker IEEE Standard
C37.06
AC High-Voltage Circuit Breakers Rated on
a Symmetrical Current Basis - Preferred
Ratings and Related Required Capabilities
Breakers
C37.09
IEEE Standard Test Procedure for AC High-
Voltage Circuit Breakers Rated on a
symmetrical Current Basis Breakers
C37.10
Application Guide for Power Circuit
Breakers
C37.11
Power Circuit Breaker Electrical Control
Requirements
C37.20.2
Metal-Clad Switchgear Assemblies
Table 1-3: Applicable National Electrical Manufacturers
Association (NEMA) Standards
Standard No. Description
SG-4
Power Circuit Breakers
SG-5
Power Switchgear Assemblies
Compliance with other national standards must be
reviewed with GE Sales.
MODULAR CONSTRUCTION AND TYPICAL SECTIONAL
VIEWS
The standard cubicles or modules are shown in Figure 1-5
through Figure 1-8. The basic concepts for two-high unit
stacking and options with rollouts are shown in Figure 1-9
and Figure 1-10. Additional illustrations will be provided to
assist in the layout of a SecoGear lineup in SECTION 5
“SecoGear Switchgear Applications.”
Modular Compartments
VT Rollout and CPT Rollouts can be intermixed in the same
compartment. The rollouts are the same physical size and
can be either upper or lower drawout tray.
