Transformer Diagnostic Bulletin
The mission of the Transformer Diagnostic Bulletin is to provide a collection of unbiased technical documents (i.e. guides, PowerPoints, and papers), all relating to transformer testing. The Bulletin is always available to both customers and non-customers.
Keep in mind that the latest Bulletin includes all the material shared in the most recent and past Bulletins.
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Feature Article
A Transformer Testing Toolbox: Troubleshooting Checklists, Test Plans, and Analysis Tips
The intention of this “Toolbox” is to provide a document that can be revisited as questions and issues arise when testing transformers. Try searching for commonly requested topics like,
- Troubleshooting Power Factor
- Electrostatic shield ground
- Voltage regulator
- Limits for natural ester
- Troubleshooting DC Winding Resistance
Past Material
Technical Papers
A Systematic Approach to High-Voltage Circuit Breaker Testing
Three Tips for Reducing Wasted Time When Testing Transformers
- A Guide for Using PTM and the CIBANO 500 to Test Circuit Breakers in North America
- NETA World Spring 2019 - The Value of Performing Power Factor Sweep Measurements
- The Value of Performing Power Factor Sweep Measurements on Bushings – Revision #1
- An Introduction to Electrical Diagnostic Testing of Power Transformers
- Obstacles Associated with Winding Resistance Measurements of Power Transformers
- A Systematic Approach to Analyzing Exciting Current Measurements on Power Transformers
- Applying SFRA and Leakage Reactance to Determine Mechanical Faults in Transformers
Application Guides
- A Guide for Performing the Anti-Pump relay check with the CIBANO 500
- A Guide for Using PTM and the TESTRANO 600 to Test Transformers
- A Guide for Using PTM and the CPC 100 to Test Transformers
- Guide for Using PTMate
- A Guide for Power Factor Testing CCVTs, PTS, and HVCTs
- CCVT, PT, and HVCT Power Factor Test Templates
Technical Slides