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   An interference current sensor for Eurostar   [View] 
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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
 Type   Members Only 
 Date   Last modified 2003-10-13 by Unknown