What Is an Insulation Resistance Test?
An insulation resistance test is a test to confirm the insulation of electrical equipment and circuits. It is performed by measuring the insulation resistance using a measuring instrument called an insulation resistance meter (Megger).
To prevent accidents caused by electricity, such as electric shock and electrical leakage, electrical equipment and wiring are insulated by covering conductors through which electricity flows with cables that do not conduct electricity well to prevent accidents from occurring by intentionally obstructing the flow of electric current.
Insulation resistance testing is an important test to confirm that the resistance has not decreased over time.