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Flexible Integrated
Transformer Solution

Managing electric power substation projects to deliver reliable power at the most efficient levels to the final point of consumption needs an integrated solution with prompt response.

Prolec GE’s Flexible Integrated Transformer (FIT) Solution is a tailor made system that meets customer’s project plans with a competitive total cost of ownership, due to Prolec GE’s unique capabilities to provide flexible solutions in a responsive manner.

Prolec GE will satisfy your requirements on full technical compliance, quality performance and efficiency as Prolec GE transformers are customized to meet your real-world needs and are based on extensive customer input and feedback to determine the required product performance, features, service levels, efficiency, support procedures, testing and quality parameters.

With 40+ years of domain expertise and more than 5000 power transformer units installed in the North America market. Prolec GE FIT Solution combines a reliable medium power transformer with responsive services to assist your power transformer projects.

Key Benefits


Used in a wide range of public utilities, industrial and commercial applications, our transformers consistently meet clients’ expectations. Our designs and manufacturing systems use state-of-the-art technology that when combined with high quality materials and components deliver decades of reliable performance and service.

The Medium Power Transformer can offer customers a variety of customized solutions including:
  • Primary substation type
  • From 10MVA up to 40MVA base capacity
  • High voltage up to 161 kV and BIL 750kV
  • Low voltage from 4kV up to 34.5 kV
  • With or without Load Tap Changer (OLTC)
  • De-Energized Tap Changer (DETC) in the High voltage side
  • Sealed tank or conservator design for oil preservation
  • Dual voltages either on low or high voltage side
Comprehensive services that include:
  • Transportation
  • Offloading
  • Assembly and installation
  • 24/7 service
Additional services are also available such as:
  • Technical support
  • Field testing
  • Spare parts
  • Training

Key Benefits

Our cores are constructed with the highest quality grain oriented silicon steel laminations. Our circular coil design allows for more resistance from short circuit forces.

Excellent short-circuit endurance and insulation system design

Using systematic and comprehensive calculation methods supported by our high-tech design tools, our transformers will operate even through severe electrical distribution system disturbances.

Integrated solution supported with technical and technological capabilities

Power transformer is complemented with our comprehensive services with the technical support of our personnel. A dedicated and experienced technical team supports your project from development to completion. Application engineers assist you from early stages of your project, providing recommendations for the proper application, its design, and any unique specifications you need.


Standard features & accessories
ANSI, IEEE, NEMA, IEC, and NMX standards
Load tap changers
  • Reactive vacuum
  • Resistive
Cooling classes
  • ONAN
  • ONAF
Tank feature
  • Cover mounted bushings
  • Leak proof joints
  • Welded Cover and Tank
  • Oil volume optimization
  • Manholes and Hand-holes
  • Sealed tank oil preservation systems
  • Pressure relief device
  • Magnetic liquid level gauge
  • Winding temperature indicator
  • Pressure vacuum gauge & bleed valve
  • Drain valves – globe type
  • Manholes on the cover
  • Transformer oil, ASTM type II
  • External core ground bushing
  • HV tap changer, de-energized operation
  • Oil temperature indicator
  • Control cabinet
Optional features
  • Dual Voltages on High Voltage and Low
  • Voltage
  • Extra Low noise designs
  • Vegetable oil
  • Higher BIL
  • LTC on High Voltage side
  • Extra low dissolved gas levels in oil
Optional accessories
  • Multi-ratio current transformer
  • Automatic gas preservation systems
  • Rapid pressure rise relay
    • Under oil
    • In gas space
  • Surge arresters
  • Side mounted bushings ≤34.5 kV
  • Conservator oil preservation system
  • Buchholz relay for conservator
  • Provisions only for safety rails
  • Provisions for surge arresters
Acceptance testing
Each transformer receives all standard routine tests in accordance with ANSI, IEEE, CSA and IEC, with test reports available by serial number of the transformer.
Standard tests
  • No-load loss & exciting current
  • Load loss & impedance
  • Temperature rise
  • Lightning & Switching impulse (class II)
  • Insulation & bushing power factor (class II)
  • Induced voltage tests
  • Partial discharge
  • Among others
Additional tests might include
  • Sweep Frequency Response Analysis (SFRA)
  • Audible Sound level
  • Dissolved gas analysis (class I)
  • Temperature rise
  • Among others