This part of IEC 60255 is based on IEC 61000-4-6, referring to that standard where applicable. It specifies the general requirements for conducted disturbances induced by electromagnetic fields for measuring relays and protection equipment for power system protection, including the control, monitoring and process interface equipment used with those systems. The objective of the tests is to confirm that the equipment under test (EUT) will operate correctly when energised and subjected to conducted disturbances, induced by radio-frequency fields with the frequency range 150 KHz to 80 MHz. The reqirements specified in this standard are applicable to measuring relays and protection equipment in a new condition and all tests specified are type tests only.