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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Conducted immunity requirements for equipment operational during high-voltage network switching operations

Stewart, M.G. and Siew, W.H. and Walker, K. and Barrack, C.S. and Campbell, L.C. and Shen, L. and Muir, F. (2001) Conducted immunity requirements for equipment operational during high-voltage network switching operations. IEE Proceedings Generation Transmission and Distribution, 148 (5). pp. 391-396. ISSN 1350-2360

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Abstract

Primary plant in modern substations is controlled and protected by electronic equipment. When breakers and disconnectors operate, very large electric and magnetic transients may be radiated from the plant as interference. This radiated interference can be picked up by cables and wiring in the substation and converted to conducted interference. The results of measured data on conducted interference are reported and the characteristics of these results and their correlation to existing standards discussed. The test results show that different discrete ranges of frequencies exist and have to be accommodated by substation equipment. Of these, two frequencies (10 kHz and 10 MHz) are not included in IEC 61000-4-12, and it is recommended that these frequencies should be included Furthermore, for an air-insulated substation with air-blast circuit breakers, it is recommended that the test level be increased to as high as 10 kV where auxiliary equipment is within 10 m of the switchgear.