IEEE 4a-2001

This amendment is applicable to dielectric tests with alternating voltages and impulse voltages, when testing an apparatus with air gaps up to 1 meter in length. It specifies correction factors for air density and humidity, which may be applied when the specific apparatus standard allows. This amendment is to be applied in conjunction with IEEE Std 4-1995, IEEE Standard Techniques for High-Voltage Testing. The paragraph numbering beginning at 1.3.5, equations, and figure numbers are as they were in IEEE Std 4-1978. Thus a reference to this amendment for a specific clause, etc., will be the same as in the original standard.