The Group has been serving US customers since 1998 and as of 2007, established its US Operations headquarters in

Atlanta, GA. In November 2009, a totally brand new power transformers plant started operations as a result of an

investment over $140 MUSD; this plant is equipped with the most modern equipment in the world and manufacturing

CORE and SHELL technology transformers up to 1,500 MVA and 525 kV.

Manufacturing Facility

Rincon, GA

Corporate Headquarters

Atlanta, GA

Group Efacec was formed in 1948 and it is now the largest Portuguese Group in the field of electricity,

employing around 4800 people and with a volume of orders that already exceeds $1,400 MUSD, being

present in more than 65 countries worldwide.

Efacec US Operations

Transformer Technologies

CORE type up to 400 MVA, 345 kV

SHELL type up to 1500 MVA, 525 kV

SHELL type - Dissociated Phase

Main Characteristics:

Interleaved windings, composed of rectangular coils: The coils have a narrow width and a large surface. All coils are interleaved between pressboard washers with the surface in contact with the coil, covered with small pressboard spacers, assuring coil cooling.

Rectangular shape magnetic core: The core is assembled by one single steel width and assembled in the horizontal position. Core's are totally protected by an electrostatic shield connected to ground.

Upper tank (bell type): This configuration assures the compression of the core and phase(s). The construction allows transportation options in the vertical or horizontal position.

Dissociated Phases: A three phase configured transformer formed by 3 single-phase components connected by a common cover which houses the bushings and the connections between phases and the on-load tap changer.

SHELL type Transformers

Product Range

1500 MVA

525 kV (BIL 1675kV)

Special Transformers

Phase-shifters

Reactors (Shunt and Series)

Traction

Furnace

Rectifiers

Advantages:

High reliability and inherent design flexibility

Excellent dielectric strength to impulse voltages due to a large series capacitance of the windings and low capacitance to ground

High mechanical strength during short-circuit stresses produced during fault conditions or seismic stresses produced during earthquakes

Windings with high air core reactance allow reduced value of the in-rush currents

Excellent cooling capability allows a lower hot spot temperature due to the vertical arrangement of the coils

Low noise level

The Dissociated Phases design flexibility allows separate transport of the phases and common cover

State of the Art Equipment:

Phase assembly drying is accomplished by three ‘Vapor-Phase’ modules

Multi-task machine for pressboard cutting and scarfing

Robotic machines for pasting spacers on pressboard washers

Transformer and components handling plant, using an air-cushion system

Manufacturing areas with environmental control (temperature, humidity and particles)

Semi-automatic oil drying and transformer filling

CORE type Transformers

Product Range

400 MVA

345 kV (BIL 1175kV)

Special Transformers

Regulation

Reactors (Shunt and Series)

Traction

Furnace

Rectifiers

Main Characteristics:

Concentric windings: The cylindrical coils are formed with a narrow thickness and a large surface area. All of the coils are insulated by pressboard barriers with pressboard spacers allowing cooling by the free flowing insulating mineral oil.

Magnetic circuit: The circular cross section is formed by vertically positioned sheets.

Tightening structure of core and windings: The design is optimized to support the short circuit stress and to allow, not only the active part untanking, but also the lifting of the complete transformer.

State of the Art Equipment:

Automatic magnetic steel cutting machine

Automatic ‘Hot-Oil Spray’ drying

Automatic ‘Vapor-Phase’ drying

All Manufacturing areas served with total environmental control (temperature, humidity and particles)

Semi-automatic oil drying and transformer filling

Testing Equipment Capabilities:

State of the art, brand new test lab with the following capability:

Rated for 60 hz testing

All ANSI standard tests except for Short Circuit

Maximum BIL of 2400 kV

Ability to test transformers up to 765 kV

Digital impulse measurement equipment

Complete DGA analysis capabilities

Double testing bank (for simultaneous testing)

Test Facility

Product Range

CORE or SHELL

up to 60 MVA

245 kV (BIL 1050kV)

Mobile Substations

Main Characteristics:

Efacec Mobile Substation design, assembling and commissioning are the result of Efacec’s substantial experience in the fields of manufacturing power equipment and/or integrating complete electrical systems.

Research and development is carried out at all levels, to continuously improve reliability.

The high level of qualification and experience of Efacec engineering assures high quality of Efacec Mobile Substations meeting ANSI/IEEE standards and all DOT requirements.

Efacec Mobile Substations are always customer engineered, resulting in a flexible and reliable design.

Efacec USA Headquarters

2755 Northwoods Parkway

Norcross, GA 30071

Ph: 770-446-8854

Fax: 770-446-8920

Efacec Power Transformers

2789 Highway 21 South

Rincon, GA 31326

Ph: 912-754-5300

Fax: 912-754-6882

www.efacecusa.com

TRF US B1 1103