Insulation resistance testers can be used to determine the integrity of windings or cables in motors, transformers, switchgear,
and electrical installations. The test method is determined by the type of equipment being tested and the reason for testing.
For instance, when testing electrical cabling or switchgear (low-capacitance equipment) the time-dependent capacitive
leakage and absorption leakage currents become insignificant and decrease to zero almost instantly. A steady conductive
leakage current flow is reached almost instantly (a minute or less) providing perfect conditions for the spot-reading/shorttime resistance test.