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Power Transformer Services

To download a Brochure from the Power Transformer Team click here. PDF File, you must have Adobe Reader to view.)

Southwest Electric has grown to be a recognized leader in the redesign and remanufacturing of medium power transformers. Our facility has approximately 65,000 square feet of manufacturing space dedicated to serving the needs of our customers. The Power Transformer Division redesigns and remanufactures failed or obsolete power transformers to current ANSI/IEEE Standards utilizing copper conductors and modern insulating materials. A resident engineering staff performs computer based short circuit analysis and redesigns the transformer incorporating Southwest's coil clamping system plus any needed reinforcements to structural members to assure compliance with ANSI/IEEE short circuit withstand requirements. Skilled, experienced craftsmen then remanufacture the transformers in accordance with documented procedures and under the controls of a comprehensive quality program to assure compliance with customer requirements and Southwest Electric Standards.

Redesign and Remanufacture

• Redesign to current ANSI/IEEE Standards for short circuit capabilities
• Up-rate capacity or reduce losses
• Voltage, impedance or winding connection changes
• Life expectancy and warranty as good as or better than new transformers.
• Resident electrical and mechanical engineering staff

Rating Capacity and Product Types

• MVA Ratings Through 200 MVA
• Voltage Ratings Through 230 kV Class, 750 kV BIL
• Specializing in circular core form transformers, mobile substation transformers, and regulators from all OEMs.

Transformer Testing

• Testing performed in accordance with customer requirements and latest IEEE/ANSI standards
• 1.6 MV, 80 kJ Impulse Generator
• Haefely HIAS 743-2 Digital Measuring System
• 350 kV dedicated Hipot Transformer
• 180 Hz synchronous M-G set

Assembly and Winding

• Over 13,000 square feet of temperature and humidity controlled manufacturing space with positive pressure
• Hydraulic coil up-ender
• Hydraulic sizing press ensures dimensional stability of windings prior to assembly of core and coils
• Dedicated coil sizing oven

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