CISPR 18-1:1982

This publication applies to radio noise from overhead power lines
and high voltage equipment which may cause interference to radio
reception, excluding the fields from power line carrier signals.
The frequency range covered is 0.15 MHz to 300 MHz. The purpose of
Part 1 is to discuss the physical phenomena
involved in the generation of electromagnetic noise fields; it also
includes the main properties of such fields and their numerical
values. The data should facilitate the use of the recommendations
given in CISPR 18-2 and 18-3.