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Substation
Small Power Transformers
225-20,000 kVA
2.5 kV through 69 kV primary voltage
120V through 34.5 kV secondary voltage
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Substation Transformers
Schneider Electric is a recognized market leader,
offering a full range of distinctively Square D®-
RELIABLE
AND
LONGLASTING
designed transformer products such as the
liquid-filled substation transformer. Like all of
our transformers, it is manufactured in ISOregistered facilities that use the industry’s leading
manufacturing technology, ensuring products of
the highest quality and performance.
At Schneider Electric, we are committed to
excellence. Our substation transformers are built
and tested to stringent Square D brand specifications, and meet or exceed applicable ANSI/IEEE,
CSA and NEMA standards. These transformers
may be UL, cUL or FM labeled upon request.
Medium-Voltage, Liquid-Filled
Substation transformers are medium-voltage,
liquid-filled, world-class power distribution
transformers. Substation transformers use a
choice of either mineral oil, silicone or lessflammable seed-oil based fluid.
For more information about substation
transformers or other products, please visit
www.us.SquareD.com or call 1-888-SquareD.
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Efficient and Dependable
Varied Applications
Liquid-filled substation transformers deliver
unrivaled reliability and high efficiency. These
long-lasting transformers provide the dependability, rugged construction and space-saving,
energy-saving economy needed for primary or
secondary distribution systems.
Liquid-filled substation transformers are
used in a wide variety of commercial and
industrial applications. They are commonly
used in medium-voltage unit substations in
indoor or outdoor applications. They are also
used in stand-alone applications in primary
or secondary distribution systems.
Rugged Design
Liquid-filled substation transformers provide
excellent mechanical strength. The core, made
of high-grade, grain-oriented, silicon steel
laminations, has high-magnetic permeability.
Magnetic flux density is kept well below the
saturation point. The core construction includes
step-lap mitered joints, ensuring that core
losses, excitation currents and noise levels
are kept to a minimum.
Environmental Information
These transformers are offered with a choice of
one of three different fluids, including mineral
oil (biodegradable oil for outdoors), silicone
fluid (dimethyl polysiloxane) or less-flammable
seed-oil based fluid. When flammability is a
concern, silicone or less-flammable seed-oil
based fluid are generally used. Less-flammable
seed-oil based fluid is used when any insulating
fluid spill could require expensive cleanup
procedures.
The sealed-tank construction of these
transformers makes them suitable for
less-than-ideal environments.
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Liquid-Filled Substation Transformer Ratings
225–20,000 kVA (fan cooling allows higher kVA ratings)
Primary voltages: 2.5 kV through 69 kV
Secondary Voltages: 120 V through 34.5 kV
120°C insulation temperature limit
ISO 9001 registered
Optional UL and cUL certification
Optional factory mutual listing
Special Design Options
Special sound requirements
Special altitude requirements
Retrofit designs
Higher efficiency requirements
Special ambient conditions
55/65°C rise
Intertaire® positive pressure nitrogen gas system
Conservator (expansion tank) liquid preservation system
Load tap changers
1-888-SQUARED
www.us.SquareD.com
Schneider Electric – North American Operating Division
1415 S. Roselle Road
Palatine, IL 60067
Tel: 847-397-2600
Fax: 847-925-7500
Document Number 7240BR0401R6/06
©2006 Schneider Electric. All rights reserved.
IEEE C57.12.00™
Standard general requirements for liquid-immersed distribution, power
and regulating transformers.
ANSI C57.12.10
Standard for transformers 230 kV and below 833/958 through 8333/10
417 kVA, single-phase, and 750/862 through 60 000/80 000/100 000
kVA, three-phase without load tap changing; and 3750/4687 through 60
000/80 000/ 100 000 kVA with load tap changing.
IEEE C57.12.70™
Terminal markings and connections for distribution and power
transformers.
ANSI C57.12.28
Switchgear and transformers, pad-mounted equipment — enclosure
integrity.
IEEE C57.12.80™
Standard terminology for power and distribution transformers (ANSI).
IEEE C57.12.90™
Test code for liquid-immersed distribution power, and regulating
transformers and guide for short-circuit testing of distribution and
power transformers (ANSI).
IEEE C57.105™
Guide for application of transformer connections in three-phase
distribution systems (ANSI).
IEEE C57.109™
Guide for liquid-immersed transformer through-fault-current
duration (ANSI).
IEEE C57.111™
Guide for acceptance of silicone insulating fluid and its maintenance
in transformers.
IEEE C57.121™
Guide for acceptance and maintenance of less flammable hydrocarbon
fluid in transformers.
CSA-C88
Power transformers and reactors.
CSA-C50
Insulating oils — electrical for transformers and switches.
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Applicable Standards
6/06