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NR BR 931

Specification for Miniature Tractive Armature AC Immune DC Neutral Line Relay, Plug-In Type for Railway Signalling

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Organization: NR
Publication Date: 1 May 1977
Status: active
Page Count: 32
scope:

FOREWORD

The relays covered by this specification are for use in line circuits where alternating current at industrial frequency may be present in the circuit.

These relays must not be used to break circuits in which the energy dissipated at the contact exceeds the limit given in clause 12.1. In general, this means that equipment such as 1ever 1ocks must be spark quenched.

This specification relates to design requirements far A.C. immune miniature tractive armature D.C. neutral line relays of the plug-in type for use in railway signalling circuits.

Document History

NR BR 931
May 1, 1977
Specification for Miniature Tractive Armature AC Immune DC Neutral Line Relay, Plug-In Type for Railway Signalling
FOREWORD The relays covered by this specification are for use in line circuits where alternating current at industrial frequency may be present in the circuit. These relays must not be used to...

References

This document references:
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 references:
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 references:
NR BR 936 - Specification for Miniature Tractive Armature DC Polarised Magnetic Stick Line Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on July 1, 1976
This specification relates to design requirements for miniature tractive armature D.C. polarised magnetic stick line relays, plug-in type for use in railway signalling circuits.
This document references:
NR BR 960 - Specification for Miniature Twin Tractive Armature D.C. Neutral Line Relay Unit (Plug-In Type) for Railway Signalling Purposes
Published by NR on November 1, 1985
This specification relates to design requirements for miniature twin tractive armature d.c. neutral line relays of the plug-in type for use in railway signaling circuits.
This document references:
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 references:
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 references:
NR BR 938 - Specification for Miniature Tractive Armature DC Neutral Track Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on September 1, 1971
This Specification relates ti design requirements for miniature tractive armature D.C neutral track relays of the plug-in type for use in railway signalling circuits.
This document references:
NR BR 944 - Supplement to Specification for All Relays or Equivalent Items Whose Pin Codes Lie in the Range 1-252, 566-1060 or 6001-6210
Published by NR on September 1, 1980
INTRODUCTION Because of the volume of charts needed to encompass the extended range of coding, full details of the placing all pins will no longer be included with all B.R. specifications applicable...
This document references:
NR BR 962 - Specification for Miniature Relay Unit, Plug-In Type, for Railway Signalling Purposes Incorporating a D.C. Neutral Thermal Time Element Relay & an Independent Tractive Armature D.C. Neutral Line Relay
Published by NR on September 1, 1981
This specification relates to design requirements for the thermal unit. The time delay is obtained by the consecutive heating and cooling of a thermal element. The following clauses define additions...
This document references:
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 references:
NR BR 936 - Specification for Miniature Tractive Armature DC Polarised Magnetic Stick Line Relay, Plug-In Type for Railway Signalling Purposes
Published by NR on July 1, 1976
This specification relates to design requirements for miniature tractive armature D.C. polarised magnetic stick line relays, plug-in type for use in railway signalling circuits.
This document references:
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 references:
NR BR 960 - Specification for Miniature Twin Tractive Armature D.C. Neutral Line Relay Unit (Plug-In Type) for Railway Signalling Purposes
Published by NR on November 1, 1985
This specification relates to design requirements for miniature twin tractive armature d.c. neutral line relays of the plug-in type for use in railway signaling circuits.
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