Megger - The Complete Guide to Electrical …

1 The Complete Guide to Electrical insulation testing Our thanks to Megger for allowing us to reprint the following. WHAT IS Good insulation ? Every electric wire in your plant whether it s in a motor, generator, cable, switch, transformer, etc. is carefully covered with some form of Electrical insulation . The wire itself is usually copper or aluminum, which is known to be a good conductor of the electric current that powers your equipment. The insulation must be just the opposite from a conductor: it should resist current and keep the current in its path along the conductor. To understand insulation testing you really don t need to go into the mathematics of electricity, but one simple equation Ohm s law can be very helpful in appreciating many aspects.

1 The Complete Guide to Electrical Insulation Testing Our thanks to Megger for allowing us to reprint the following. WHAT IS “Good” insulation?

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