BR961 Feb 1972
Specification for Miniature Twin Tractive Armature A.C. Immune D.C. Biased Neutral Line Relay Unit, Plug-in Type, for Railway Signalling Purposes
This specification relates to design requirements for miniature twin tractive armature A.C. immune D.C. biased neutral line relays of the plug-in type for use in railway signalling circuits.
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- In Force: