BR932A Sep 1971
Specification for Miniature Tractive Armature, AC Immune DC Biased Neutral Line Relay, Plug-in Type for Railway Signalling Purposes
This specification relates to design requirements for miniature tractive armature D.C biased neutral line relays of the plug-in type for use in railway signalling circuits irrespective of the presence in the circuit of alternating current at industrial frequency.
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- In Force: