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  1. energymonkey

    Megger (Insulation Resistance test) on 150 kV OH TL procedure?

    Hello everyone, I'm working on 150 kV project that nearly finish. My friend told me that before we 'energize' (the first time that the line powered with 150 kV) the line, we need to megger it. Then it give me some question : 1. is it really necessary? after all, we had have visualy line check...

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