Electrical relays Part 22-7: Electrical disturbance tests for measuring relays and protection equipment Power frequency immunity tests
|Publication Date:||1 April 2003|
|ICS Code (Relays):||29.120.70|
This part of IEC 60255 is based on the concepts described in IEC 61000-4-16, referring to that publication where applicable, and specifies the general requirements for power frequency 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 short duration, conducted, common and differential mode power frequency disturbances applied to DC status inputs, at the rated frequency of the EUT, for example 162/3 Hz, 50 Hz and 60 Hz.
The testing of pilot wire schemes between substations is not covered by this standard.
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.
The object of this standard is to state:
- definitions of terms used;
- test severity levels;
- test equipment;
- test set-up;
- test procedures;
- criteria for acceptance;
- test report.