DIRANA

DIRANA is a high-end dielectric response analyzer developed to assess moisture levels and insulation quality in power transformers. Using Frequency Domain Spectroscopy (FDS) and Time Domain Spectroscopy (PDC), DIRANA provides highly accurate moisture analysis of cellulose insulation. The system compensates for oil conductivity, temperature, and design parameters to produce precise diagnostic results. Its measurement algorithms are based on decades of research and are validated against international standards. The device is portable, field-ready, and optimized for difficult substation conditions. With guided workflows and automated moisture modeling, DIRANA helps utilities prevent insulation aging, overheating, and unexpected failures. It is widely used for oil-paper insulation assessment across all transformer voltage classes.

Key Features

• FDS & PDC dielectric response measurement

• Accurate moisture determination in cellulose insulation

• Temperature and conductivity compensation

• Automated insulation modeling

• Portable and robust design

• IEC/IEEE-compliant diagnostics

Applications

• Power transformer moisture assessment

• Oil-paper insulation condition evaluation

• Fleet asset management

• Commissioning and long-term monitoring

• Preventive maintenance and life-extension studies

Keywords

dielectric response testing, moisture in transformer, FDS analysis, PDC measurement, oil-paper insulation diagnostics