NBN EN 60255-25 : 2001

1 Scope and object
2 Normative references
3 Definitions
4 Emission limits
      4.1 Conducted emission limits
      4.2 Radiated emission limits
5 General measurement requirements for emission tests
      5.1 Ambient noise in measurement test sites
      5.2 Requirements for measurement of conducted
             emissions
      5.3 Requirements for measurement of radiated
             emissions
6 Test procedure for emission tests
      6.1 General configuration of the EUT
      6.2 Measurement of conducted emissions
      6.3 Measurement of radiated emissions
      6.4 Measurement of radiated emissions at
             alternative distances
7 Criteria for acceptance
8 Test report
Annex A (informative) The use of measuring relays and
                      protection equipment in other
                      locations
Annex B (informative) Explanatory notes on the origin of
                      this emission standard
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications
Figure 1 - Dimensions of test site
Figure 2 - Minimum size of metal ground plane
Table 1 - Conducted emission limits
Table 2 - Radiated emission limits

Gives general requirements for the measurement of radio-frequency emissions emanating from measuring relays and protection equipment for power system protection. Includes control, monitoring and proc process interface equipment used with such systems. Based on CISPR 22. Defines the limits of acceptable conducted and radiated emissions and specifies test procedures. The object of the tests is to confirm that the equipment being tested will not cause conducted or radiated emissions above defined levels which might affect the satisfactory operation of other equipment. Any equipment or part of equipment which has the primary function of radio transmission and/or reception is excluded from this standard. Requirement defined are applicable to measuring relays and protection equipment in a new condition, all are type test onl