PTss Online Transformer Dryout Systems (TDS) - Real results
đź“ŤÂ 220kV Sub-Station, Mandi Gobindgarh (100 MVA Transformer)
✔️ BDV improved from 36 kV → 56 kV
✔️ Water content reduced from 28 ppm → <10 ppm
✔️ Specific resistivity jumped from 12.4×10¹² → 43.5×10¹² ohm-cm
✔️ Tan Delta halved from 0.0022 → 0.0011
✔️ IFT improved from 35 → 41 dynes/cm
➡️ Clear improvement in oil health and insulation strength.
đź“ŤÂ 220kV Sub-Station, Jagraon (100 MVA Transformer)
✔️ BDV improved from 40 kV → 66 kV
✔️ Water content reduced from 25 ppm → 10 ppm
✔️ Significant improvement in IR values (MΩ) across all windings:
At Power Transformers Sales & Services Pvt Ltd., we continuously strive to enhance the reliability and life of critical transformer assets. We are proud to share our field case studies from past, where our Online Transformer Dryout Systems (TDS) demonstrated remarkable improvements at two key substations:
HV–Earth: 1350 → 2350
HV–LV: 1380 → 2440
HV–Tertiary: 2380 → 3580
LV–Earth: 1300 → 2170
➡️ Strong gains in both oil quality and insulation resistance, ensures long-term transformer reliability.
These results reaffirm the effectiveness of Online TDS technology in improving transformer oil properties, boosting IR/PI values, and extending asset life all without requiring shutdowns.
Proud of our team’s role in enabling utilities to achieve higher reliability, reduced failures, and longer transformer life.