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Electrical Engineering/Troubleshooting Electrical Transformers.


Dear Proof Cleggsan

What are the Best methods for troubleshooting electrical Transformers in case of checking whether it has failed or malfunctioning?.

Can Multimeter, CRO instruments help in this regard?.


Yes, a multimeter with good low resistance ohmmeter can check for dc resistance of the coil which is good.

But, for power transformers you must also have a hi-pot tester which test the high voltage for arcing over between coils and coil wires of the same winding.  With very low insulation over the winding wires of a coil they are easily broken down when high voltage spikes occur.

Below is a link to wiki on hi-pot testing for you to study:

Hope this will help you.  

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