New signaling systems developed for British Railways on occasion of conversion of existing electrified lines from direct to 50 cps a-c traction, together with installation of new a-c traction systems; new systems are immune to interference from traction currents in a-c systems, and also, in some instances, to interference from d-c traction systems at same time.
Railway signalling circuits for a-c. traction systems
G.E.C. Journal
G.E.C. Journal ; 28 , n 3
1961
6 pages
Aufsatz (Zeitschrift)
Englisch
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Railway signalling problems in 50-cycle traction areas
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