Understanding Transformer Testing 

This video provides a short technical overview of the most common transformer measurements and how these measurements are made.
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Timeline:
00:00 Introduction
00:12 Suggested Viewing
00:27 About transformers
01:20 Transformer construction
02:01 About transformer testing
02:40 Common transformer measurements
03:08 Turns ratio
03:49 About mutual inductance (M)
04:48 About phase angle
05:23 Measuring phase angle
05:48 About primary and secondary inductance
06:21 Turns ratio from primary and secondary inductance
07:10 About leakage inductance - ideal transformer
07:40 About leakage inductance - real transformer
08:30 Measuring leakage inductance
09:15 Summary

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