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NR/L2/SIG/11107 ISSUE 2

Silver Migration (aka NR/SP/SIG/11107)

inactive
Organization: NR
Publication Date: 26 August 2008
Status: inactive
Page Count: 8
scope:

The contents of this Level 2 document apply to all signalling installations which use silver plated connectors on plug-in apparatus.

Further contamination problems with relay plugboards are considered in Signalling Equipment Technical Advice Notice NR/GN/SIG/19015.

PURPOSE

To define the policy for the management and prevention of silver migration within signalling equipment, so as to satisfy the mandatory requirements of Railway Group Standard GK/RT0210, Asset Management for the Safety of Signalling and Operational Telecommunication Systems and Equipment.

Document History

NR/L2/SIG/11107
March 3, 2012
Silver Migration
Applies to all relays, plugboards and plug couplers formed of black phenolic material. Purpose Silver Migration can lead to wrong side failures. This standard specifies: a) The required...
NR/L2/SIG/11107 ISSUE 3
December 3, 2011
Silver Migration
Applies to all relays, plugboards and plug couplers formed of black phenolic material. Purpose Silver Migration can lead to wrong side failures. This standard specifies: a) The required...
NR/L2/SIG/11107 ISSUE 2
August 26, 2008
Silver Migration (aka NR/SP/SIG/11107)
The contents of this Level 2 document apply to all signalling installations which use silver plated connectors on plug-in apparatus. Further contamination problems with relay plugboards are...
RT/E/S/11107 ISSUE 1
December 1, 2000
Silver Migration (aka NR/SP/SIG/11107)
The contents of this Specification apply to all signalling installations which use silver plated connectors on plug-in apparatus. Further contamination problems with relay plugboards are considered...

References

This document references:
NR BR 829 - Specification for Plugboards for Miniature Relay Units for Railway Signalling Purposes
Published by NR on January 1, 1981
GENERAL The plugboard covered by this specification shall be intended as a plug-in connection and mounting for BR specification 930 series relays. The plugboard shall be constructed so as to retain...
This document is referenced by:
ACC/CAT/CO/001 ISSUE 130 - Catalogue of Network Rail Standards (aka NR/CAT/STP/001)
December 2, 2023
A description is not available for this item.
This document is referenced by:
NR/L2/SIG/11129 - Life Management of Signalling Relays and Electro-Mechanical Searchlight and Banner Signals
Published by NR on September 3, 2011
The requirements of this standard apply to electro-mechanical relays and electromechanical searchlight and banner signal mechanisms that perform safety critical or safety related functions and that...
This document is referenced by:
NR/L2/SIG/11201 ISSUE 18 - Signalling Design Handbook
Published by NR on December 2, 2023
This standard lays down the requirements for: a) the design of signalling works applicable to the infrastructure; b) the design of signalling systems; c) the design of software and data used in...
This document is referenced by:
NR/L3/SIG/19272 - Signalling Equipment Workshop Engineering Notice (SIGWEN021) Signalling Relays
Published by NR on June 4, 2011
This standard applies to the manufacture, repair and servicing of electro-mechanical relays that form part of the infrastructure based railway signalling control system which are used in safety...
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