Transcription of Megger - The Complete Guide to Electrical Insulation Testing
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Megger - The Complete Guide to Electrical Insulation Testing
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. Even if you ve been exposed to this law before, it may be a good idea to review it in the light of Insulation Testing . The purpose of Insulation around a conductor is much like that of a pipe carrying water, and Ohm s law of electricity can be more easily understood by a comparison with water flow.
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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