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IEC 60255-121

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

active, Most Current
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Organization: IEC
Publication Date: 1 March 2014
Status: active
Page Count: 306
ICS Code (Relays): 29.120.70

Document History

IEC 60255-121
March 1, 2014
Measuring relays and protection equipment – Part 121: Functional requirements for distance protection
A description is not available for this item.

References

This document is referenced by:
SNZ AS/NZS IEC 60947.4.2 - Low-voltage switchgear and controlgear Part 4.2: Contactors and motor-starters-AC semiconductor motor controllers and starters
Published by SNZ on June 29, 2015
This standard applies to a.c. semiconductor motor controllers and starters, which may include a series mechanical switching device, intended to be connected to circuits, the rated voltage of which...
This document is referenced by:
SNZ AS/NZS IEC 60947.5.1 - Low-voltage switchgear and controlgear Part 5.1: Control circuit devices and switching elements-Electromechanical control circuit devices
Published by SNZ on June 29, 2015
Scope and object This part of IEC 60947 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies...
This document is referenced by:
IEC 60947-5-1 REDLINE - Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit devices
Published by IEC on May 1, 2016
Scope and object This part of IEC 60947 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies...
This document is referenced by:
TR 61869-100 CORR 1 - INSTRUMENT TRANSFORMERS – Part 100: Guidance for application of current transformers in power system protection
Published by IEC on October 1, 2023
A description is not available for this item.
This document is referenced by:
BS PD IEC/TR 61869-100 - Instrument transformers Part 100: Guidance for application of current transformers in power system protection
Published by BSI on February 28, 2017
A description is not available for this item.
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