BS5467/6346/6460 state the duration for Hi-pot test is 15 minutes(I myself did not check BS). It is understood that 5 miniutes is long enough to verify test.
Is there any reason to extend it up to 15 minutes ?
Can anyone recommend a site with good basic literatute on the basics of Hi-Pot tetsing and megger testing. Looking for when to use Hi pot test and if it's typically used on equipment 600v and below.