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NR BR 937

Specification for Miniature DC Neutral Thermal Time Element Relay, Plug-In Type for Railway Signalling Purposes

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Organization: NR
Publication Date: 1 September 1971
Status: active
Page Count: 27
scope:

This specification relates to design requirements for miniature D.C. neutral thermal time element relays of the plug-in type for use in railway signaling circuits. The time delay is obtained by the consecutive heating and cooling of a thermal element.

Document History

NR BR 937
September 1, 1971
Specification for Miniature DC Neutral Thermal Time Element Relay, Plug-In Type for Railway Signalling Purposes
This specification relates to design requirements for miniature D.C. neutral thermal time element relays of the plug-in type for use in railway signaling circuits. The time delay is obtained by the...

References

This document is referenced by:
NR BR 933 - Specification for Miniature Tractive Armature AC Immune DC Slow Pick-Up Neutral Line Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on May 1, 1977
This specification relates to the design requirements of miniature tractive armature D.C slow pick-up neutral line relays for use in railway signaling circuits, irrespective of the presence in the...
This document is referenced by:
NR BR 932 - Specification for Miniature Tractive Armature AC Immune DC Biased Neutral Line Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on May 1, 1977
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...
This document is referenced by:
NR BR 930 - Specification For Miniature Tractive Armature DC Neutral Line Relay (Plug-In Type) for Railway Signalling Purposes
Published by NR on November 1, 1985
GENERAL The relays covered by this specification are for general railway signalling purposes, i.e. line circuits, control circuits etc. where special characteristics such as a.c. immunity, slow...
This document is referenced by:
NR BR 935 - Specification for Miniature Tractive Armature DC Magnetically Latched Neutral Line Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on September 5, 1981
This specification relates to design requirements for miniature tractive armature D.C. relays of the plug-in type for use in railway signaling circuits. The design is such that once the armature is...
This document is referenced by:
NR BR 934 - Specification for Miniature Tractive Armature AC Immune DC Slow Release Neutral Line Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on May 1, 1977
This specification relates to design requirements for miniature tractive armature D.C. slow release neutral line relays of the plug in type for use in railway signaling circuits, irrespective of the...
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