Bushing Technology and Monitoring: OIP, RIP or RIS?

Bushing Technology and Monitoring: OIP, RIP or RIS?

by Power Systems Technology

Applied Sciences & Engineering Energy THEnergy technology and engineeringTHRElectrical engineering
🎙 Power Systems Technology 👥 556 📅 March 30, 2026 ⏱ 61 min 👁 162 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

bushingtransformerOIPRIPRIS

Summary

This panel discussion, moderated by Alan Ross, brings together three experts in transformer bushings: Randy Williams (38 years in bushing manufacturing), Thomas Lynn (background in GIS and bushings, currently heading a group of experts), and Brad Bonus (CIO at Systems with Intelligence). The conversation covers the evolution of bushing technology from oil-impregnated paper (OIP) to resin-impregnated paper (RIP) and resin-impregnated synthetic (RIS). The experts explain the differences in manufacturing, advantages, and limitations of each type. They highlight that OIP bushings have been around for 100 years, RIP for about 60 years, and RIS is newer. RIS offers advantages in moisture resistance and faster production times, but is limited in voltage range and customization. The discussion also addresses bushing failures, which account for 20% of transformer failures, and the importance of monitoring. Strategies include condition-based monitoring and targeted monitoring for critical assets. The panel emphasizes the need for continuous thermal monitoring to detect hot spots that can lead to failures. They also touch on the impact of transients, operating conditions, and the future of AI and machine learning in monitoring. The session includes audience Q&A on topics like altitude, tan delta, oversizing, and vacuum breakers.

194 words

Critical Evaluation

Value of the Information & Strength of the Argument

The video provides valuable insights from experienced professionals in the field. The discussion is grounded in practical experience, with Randy Williams citing his involvement in thousands of bushing tear-downs and field investigations. The panelists present a balanced view of the technologies, acknowledging trade-offs between OIP, RIP, and RIS. The argumentation is solid, relying on real-world examples and industry knowledge. However, the lack of formal data or references limits the depth of scientific rigor. The discussion on monitoring strategies is particularly valuable, highlighting the importance of continuous monitoring and the challenges of condition-based maintenance.

Scientific Rigor, Source Quality, Title Accuracy

The video is a panel discussion with no formal citations or references to scientific literature. The experts rely on their extensive industry experience, which adds credibility but not academic rigor. The title accurately reflects the content, focusing on bushing technology and monitoring. The description mentions that 20% of transformer failures are linked to bushings, a statistic that is commonly cited in the industry. The video does not provide sources for this claim, but it is plausible. The discussion is consistent with known industry knowledge, and the experts’ backgrounds lend authority to their statements. No comments were provided for analysis.

207 words

Title / Content Match

The title accurately reflects the content, which compares OIP, RIP, and RIS bushing technologies and discusses monitoring strategies.

Quality & Reliability

7/10

Panel discussion with industry experts (Randy Williams, Thomas Lynn, Brad Bonus) providing practical insights and experience-based knowledge. No formal citations or peer-reviewed sources, but speakers have extensive field experience. Technical details are plausible and consistent with industry knowledge.

Chapters

Cited Sources

Concurring Sources

  • Transformer bushing — General information on transformer bushings, consistent with the video's content.

Contribution & Novelties

The video offers a practical, expert-driven overview of bushing technologies and monitoring strategies, which is valuable for professionals in the power industry. It highlights the trade-offs between OIP, RIP, and RIS, and emphasizes the importance of continuous monitoring. The discussion on the future of AI and machine learning in monitoring provides forward-looking insights.

Pour aller plus loin :

  • Transformer bushing — Wikipedia article providing general background on transformer bushings.
  • Condition monitoring — Wikipedia article on condition monitoring techniques.
  • Dissolved gas analysis — Wikipedia article on DGA, a key monitoring technique for transformers.

92 words

Radar Profile

The radar profile shows high scores in quantity of information and fiabilite, reflecting the depth of expert discussion and credible experience. The niveau technique is moderate, indicating that the content is accessible to a technical audience but not overly complex. The overall balance suggests a valuable resource for professionals seeking practical insights.

Reliability 7/10