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BSI - BS EN 60255-121

Measuring relays and protection equipment Part 121: Functional requirements for distance protection

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Organization: BSI
Publication Date: 31 July 2014
Status: active
Page Count: 152
ICS Code (Relays): 29.120.70

Document History

BS EN 60255-121
July 31, 2014
Measuring relays and protection equipment Part 121: Functional requirements for distance protection
A description is not available for this item.

References

This document references:
EN 61869-2 - Instrument transformers - Part 2: Additional requirements for current transformers
Published by CENELEC on November 1, 2012
This part of IEC 61869 is applicable to newly manufactured inductive current transformers for use with electrical measuring instruments and/or electrical protective devices having rated frequencies...
This document references:
EN 61869-5 - Instrument transformers - Part 5: Additional requirements for capacitor voltage transformers
Published by CENELEC on October 1, 2011
This part of IEC 61869 applies to new single-phase capacitor voltage transformers connected between line and ground for system voltages Um ≥ 72,5 kV at power frequencies from 15 Hz to 100 Hz. They...
This document references:
IEC 61869-5 - INSTRUMENT TRANSFORMERS – Part 5: Additional requirements for capacitor voltage transformers
Published by IEC on August 1, 2015
A description is not available for this item.
This document references:
IEC 61869-2 - Instrument transformers – Part 2: Additional requirements for current transformers
Published by IEC on September 1, 2012
This part of IEC 61869 is applicable to newly manufactured inductive current transformers for use with electrical measuring instruments and/or electrical protective devices having rated frequencies...
This document references:
IEC 61869-5 - INSTRUMENT TRANSFORMERS – Part 5: Additional requirements for capacitor voltage transformers
Published by IEC on August 1, 2015
A description is not available for this item.
This document is referenced by:
NR/L2/ELP/27730 - Specification for 750 V dc Switchgear
Published by NR on March 3, 2018
The scope of this document covers requirements related to Network Rail 750 V rated d.c. controlled switchgear devices suitable for use in d.c. traction systems. Where this document references 750 V...
This document is referenced by:
S1964 - DC Protection Requirements
Published by LUL on March 1, 2023
This standard applies to all nominal 630V DC and 750V DC circuits derived from traction Substations including depots and sidings. The DC Traction Supply system nominal voltage shall be 630V or 750V...
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