Most dielectric and mechanical failures in large power transformers are preceded by mechanical changes in the winding structure. These displacements in the winding structure may be the result of transportation damage, short circuit forces, or natural aging effects on the insulating structures used to support the windings. Detection of these displacements before dielectric failure reduces maintenance costs, and improves system reliability.

Sweep Frequency Response Analyzer (SFRA) is designed to detect winding displacements in power transformers or faults in the magnetic core. The system provides attenuation signature curves that can easily be compared for deviations which indicate:

• Core movements
• Winding deformations and displacements
• Faulty core grounds
• Partial winding collapse
• Hoop buckling
• Broken or loosened clamping structures
• Shorted turns and open windings

Unique features of SFRA:

• High accuracy
• Small size and low weight
• Powerful analysis tools that are intuitive and easy to use
• Wireless, Bluetooth, communication between laptop an instruments allows flexibility in the field.
• Galvanic isolated USB interface for personnel and equipment safety.