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ELECTRICAL RELAYS - PART 22-7: ELECTRICAL DISTURBANCE TESTS FOR MEASURING RELAYS AND PROTECTION EQUIPMENT - POWER FREQUENCY IMMUNITY TESTS
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Superseded date: 01-03-2014
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Published date: 12-01-2013
Publisher: Verband Deutscher Elektrotechniker
1 Scope and object2 Normative references3 Definitions4 Test severity levels5 Test equipment 5.1 Test generator 5.2 Verification of the test generator 5.3 Coupling networks6 Test set-up 6.1 Earthing connections 6.2 Auxiliary equipment7 Test procedure8 Criteria for acceptance9 Test reportAnnex A (informative) Background information for power frequency testsAnnex ZA (normative) Normative references to international publications with their corresponding European publicationsFigure 1 - Port tested in this standard for measuring relays and protection equipmentFigure 2 - Example of Class A differential mode testsFigure 3 - Example of Class B differential mode testsFigure 4 - Example of common mode tests
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.
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