Transformer Bulletin

The mission of the Transformer 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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Our articles

New Material 

• A Guide for Power Factor Testing CCVTs, PTS, and HVCTs
• NETA World Spring 2019 - The Value of Performing Power Factor Sweep Measurements
• Guide for Using PTMate
   

 

Past Material

Technical Slides

• The Overall Power Factor Test (In-Depth)
• The Power Factor Frequency Sweep and Voltage Sweep Tests (In-Depth)
• Bushing Power Factor Testing (In-Depth)
• The Exciting Current Test (In-Depth)
• The DC Winding Resistance Test (In-Depth)
• SFRA Testing on Power Transformers (Introduction)

 

Technical Papers

• 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

 

Miscellaneous Videos, Guides, and Information

• Watch Video: Transformer Testing with a One-Time Test Connection
• PTM Transformer Training Guide