This part of IEC 60255 is based on IEC 61000-4-3, referring to that publication where applicable, and specifies the general requirements for radiated electromagnetic field immunity tests 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 an electromagnetic field from a radiation source operating within the frequency range 80 MHz to 2,7 GHz. NOTE 1 The product standard IEC 60255-22-6 (based on IEC 61000-4-6) establishes the immunity of measuring relays and protection equipment over the frequency range of 0,15 MHz to 80 MHz. NOTE 2 The test methods defined in this standard are structured for the primary objective of establishing adequate repeatability of results at various test facilities for qualitative analysis of effects. The test methods using a portable transmitter2 are not taken into consideration here because the EMC directive now specifies a sweep test, calibrated field strengths must be used and the portable transmitter test is not generally reproducible. The requirements specified in this standard are applicable to measuring relays and protection equipment in a new condition, and all tests specified are type tests only.