The Complete Guide to Electrical Insulation Testing

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A STITCH IN TIME Complete Guide to Electrical Insulation Testing A STITCH IN TIME 1 A Stitch In Time The Complete Guide to Electrical Insulation TestingCopyright 2 A STITCH IN TIMEConTEnTS PAGEWHAT IS Good Insulation ? ........................................ ................................3WHAT MAkeS Insulation Go BAd? ........................................ ........................4HoW Insulation ReSISTAnCe IS MeASuRed ........................................ ..........5HoW To InTeRpReT ReSISTAnCe ReAdInGS ........................................ ............6FACToRS AFFeCTInG Insulation ReSISTAnCe ReAdInGS ..............................8TypeS oF Insulation ReSISTAnCe TeSTS.

3. Conduction or leakage Current A small essentially steady current both through and over the insulation. As shown in Fig. 5, the total current is the sum of the three components and it is this current that can be measured directly by a microammeter, or in terms of megohms at a particular voltage by means of a Megger instrument (ohmmeter).

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