There are several hipot tests done to check the effectiveness of insulators on electrical devices. Let’s discuss the differences between DC and AC hipot.
AC hipot test is done by applying a high AC voltage on the test conductor and measuring the leakage current. This test gives a higher leakage current reading because a cable can act as a capacitor. AC current flows easily on a capacitor than DC. The test voltage applied on the test conductor is lower compared to DC but more power is required because at 60 hertz, the capacitive reactance is low.
There are special instances to use a AC or a DC hipot test. Protec has a vast line of high voltage equipment for rent or for purchase. Contact us today for great deals on test equipment.
Editors Note: This blog was orginally posted on August 18, 2010