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An interference current sensor for Eurostar
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Author(s) |
C.D.M. Oates; W.G. Garlick; R. Banks; N. Spibey; A.J. Burnett; R.B. Siddall |
Abstract |
An Interference Current Monitor Unit (ICMU) is used in railway systems to provide a means of
detecting and preventing electrical currents drawn by a train from interfering with the track
signalling. It does this by detecting the presence of electrical interference and shutting down the
relevant part of the train system for sufficient time for the interference to clear. The ICMUs for
the Eurostar 750V d.c. supply have to detect currents of less than 2 A r.m.s at 50Hz in the
presence of up to 3,000 A d.c. in a busbar also used at rated input voltages of 3 kV. The ICMU’s
design was subject to stringent reliability requirements and it had to be mounted in an area of very
high electro-magnetic field and so needed to be immune to electrical interference. This paper
discusses the characterisation of the electromagnetic environment, the busbar currents to be
monitored on Eurostar and the implications for equipment design. |
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Filename: | EPE2003-PP1147 - Oates |
Filesize: | 377.6 KB |
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Type |
Members Only |
Date |
Last modified 2003-10-13 by Unknown |
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