Insulation Resistance Test Standard Values

Developed early in the 20th century the insulation resistance ir test is the oldest and most widely used test for assessing the quality of insulation.

Insulation resistance test standard values.

3 shows a typical scale which reads increasing resistance values from left up to infinity or a resistance too high to be measured. Figure 4 typical record of insulation resistance of a mill motor. As per ie rules 1956. The insulation resistance test is the second test required by the electrical safety testing standards.

The international electrical testing association neta specification maintenance testing specifications for electrical power distribution equipment and. Curve b shows same values corrected to 20 c see page 22 giving a definite downward. 1k v 1 mω minimum 1kv 1 mω 1kv. Curve a shows test values as measured.

The insulation resistance test consists in measuring the insulation resistance of a. As per ie rules 1956. Insulation resistance test values the insulation resistance values on this page are based off of representative values suggested by the neta standards review council. At a pressure of 1000 v applied between each live conductor and earth for a period of one minute the insulation resistance of hv installations shall be at least 1 mega ohm or as specified by the bureau of indian standards.

1k v 1 mω minimum 1kv 1 mω 1kv. Based upon equipment rating. Based upon equipment rating. At a pressure of 1000 v applied between each live conductor and earth for a period of one minute the insulation resistance of hv installations shall be at least 1 mega ohm or as specified by the bureau of indian standards.

Also acceptable values of insulation resistance depend upon the equipment you re testing. One meg ohm rule for ir value for equipment.