SS 109:1974 (2023)
[Mature]
Bitumen-based filling compounds for electrical purposes
...3 Voltage supply, provided by a transformer, of any convenient frequency between
25 and 100 cis, and capable of being raised uniformly from zero...
...The voltage shall be
of approximately sine wave form, and the peak factor shall lie within the limits of ,v2
5%, i...
...formor, or to a voltmeter winding provided thereon and calibrated
against a sphere gap in place of the test cell...