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NR BR 1669

Specification for Tuning Capacitor for Use in Impedance Bonds within Audio Frequency Track Circuits

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Organization: NR
Publication Date: 1 April 1987
Status: active
Page Count: 11
scope:

These tuning capacitor units are intended for use with impedance bonds to BR Specification 863 on lines having d.c. electric traction at 600 - 1500 Volts.

When fitted, the capacitor unit is intended to resonate an impedance bond so that the bond presents an impedance of not less than 12 ohms to the track circuitry in which it is fitted.

Document History

NR BR 1669
April 1, 1987
Specification for Tuning Capacitor for Use in Impedance Bonds within Audio Frequency Track Circuits
These tuning capacitor units are intended for use with impedance bonds to BR Specification 863 on lines having d.c. electric traction at 600 - 1500 Volts. When fitted, the capacitor unit is intended...

References

This document references:
BS 148 - Recycled mineral insulating oil for transformers and switchgear - Specification
Published by BSI on March 31, 2020
A description is not available for this item.
This document is referenced by:
NR RT/E/PS/11763 - Reed Type RT Track Circuits (aka NR/PS/SIG/11763)
Published by NR on December 1, 2000
The contents of this Product Specification apply to all Alstom Reed Type RT track circuits. The more general requirements can be found in RT/E/S/11752. Safety issues specific to Reed applications are...
This document is referenced by:
NR RT/E/PS/11765 - Impedance Bonds (aka NR/PS/SIG/11765)
Published by NR on December 1, 2000
The contents of this Product Specification apply to all impedance bonds. The more general requirements can be found in RT/E/S/11752. Safety issues specific to impedance bonds are included; general...
This document is referenced by:
NR BR 863 - Specification for Impedance Bonds for Use with 50Hz Double Rail Track Circuits and Audio Frequency Track Circuits
Published by NR on January 1, 1992
This specification applies to air cooled impedance bonds for use on lines having d.c. electric traction at 600 to 1500 volts. The bonds shall have a continuous rating of:- Type 2 2400 amps d.c. per...
This document is referenced by:
NR/GN/SIG/CAT006 - Index of NR Documents Relating to Signalling & Communications Equipment
Published by NR on June 2, 2012
This standard represents historical information and best practice for equipment and systems that are still found on the infrastructure. This is not a mandatory standard and users should check...
This document is referenced by:
NR/L3/SIG/11761 - Handbook for EBI Track 200 Audio Frequency Track Circuit
Published by NR on December 2, 2017
This document applies to all applications of EBI Track 200 on Network Rail’s infrastructure. The EBI Track 200 Handbook consists of this index and a number of mandatory sections from both Network...
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