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Insulation Test Facts

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The insulation test measures the ohmic value of the insulation under direct high voltage current. It is used to provide a scientific resistance figure for all of a product’s insulation. This is a basic prerequisite by the electrical safety testing standards. A megohmmeter is commonly used to carry out this procedure. 


Incorrect measurement is avoided at all cost by the steady voltage. During this process, relative humidity and temperature are closely monitored because they are major factors that may interfere with resistance extent. A guard circuit is usually employed in the process so as to minimize currents from leaking.

The AC hipot test verifies that the protection is sufficient to the operator from suffering electric shock. It involves the use of alternating current for test performance. The term ‘hipot’ stands for high potential. This is vital because a vast range of electrical appliances, industries and even power systems use alternating current in their operations.  The frequency of the current used is normally 50 or 60 hertz. DC hipot is also another standard test used in evaluating current. Voltage is applied in the same fashion but the source of current is where AC and DC differ. 

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