How to use insulation tester (Megger)? |Explained 

Welcome to Thursday questions, today Electrical Engineering Planet will answer an important question:
What is insulation tester or mega ohmmeter or megger? How to use it?
You can ask any question and EEP will try to answer it in the next videos
Hint:
We use guard terminal for this reason: Large cables, windings, power transformers, electrical bushings and other assets that have large surface areas can become contaminated by dirt or even a thin film of moisture. These conditions tend to lead to significant surface leakage current which can seriously affect the measurement of the true insulation leakage current.
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