Amendment 1
Radio interference characteristics of overhead power lines and high-voltage equipment
Part 2: Methods of measurement and procedure for determining limits
This amendment has been prepared by CISPR sub-committee C: Interference from
overhead power lines, high-voltage equipment and electric traction systems.
The text of this amendment is based on the following documents:
Full information on the voting for the approval of this amendment can be found in the
voting reports indicated in the above table.
NOTE - The present amendment introduces two new clauses into publication CISPR 18-2. They regard
the methods for derivation of limits for the radio noise due to HVDC lines (clause 3) and procedures for
determining limits of radio noise produced by insulator sets (clause 4).
Clause 2 of CISPR 18-2 in general, and more specifically subclause 2.3, present methods for derivation of
limits for radio noise produced by overhead power lines. The indications given under clause 2 are to be
considered mainly relevant to a.c. lines while the new clause 3 of the present amendment is specifically
relevant to HVDC lines.
Besides, subciause 2.7 of 18-2 gives some generic indications about the procedures for determining limits
of radio noise produced by insulator sets. This matter is more specifically addressed in the new clause 4 of
the present amendment.
For the above reasons some repetitions may be found in the new clauses 3 and 4. These repetitions allow
an easier reading of the amendment which is written as a self-standing document.