Specifies routine tests for the measurement of partial discharges in CTs and VTs having rated voltages above 6.6 kV (with solid insulation) and 33 kV (with liquid-immersed insulation). Specifies also permissible discharge levels in terms of the apparent charge. Agrees with IEC 44-4 (which however covers only above 66 kV for liquid-immersed insulation) but acknowledges possible higher values for bushings as permitted by AS 1265.
