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CEI EN 60255-127

Measuring relays and protection equipment Part 127: Functional requirements for over/under voltage protection

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Organization: CEI
Publication Date: 1 May 2015
Status: active
Page Count: 52
ICS Code (Relays): 29.120.70
scope:

This part of IEC 60255 specifies minimum requirements for over/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay characteristics.

This standard defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions. The test methodologies for verifying performance characteristics and accuracy are also included in this standard.

The general requirements for measuring relays and protection equipment are specified in IEC 60255-1.

Document History

CEI EN 60255-127
May 1, 2015
Measuring relays and protection equipment Part 127: Functional requirements for over/under voltage protection
This part of IEC 60255 specifies minimum requirements for over/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay...
EN 60255-127
December 1, 2014
Measuring relays and protection equipment Part 127: Functional requirements for over/under voltage protection
This part of IEC 60255 specifies minimum requirements for over/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay...

References

This document references:
IEC 60050-447 - International Electrotechnical Vocabulary (IEV) – Part 447: Measuring relays and protection equipment
Published by IEC on May 1, 2020
This part of IEC 60050 gives the general terminology used in measuring relays and protection equipment, as well as general terms pertaining to specific applications and associated technologies. This...
This document references:
60255-1 - Measuring relays and protection equipment – Part 1: Common requirements
Published by IEC on December 1, 2022
This part of IEC 60255 specifies common rules and requirements applicable to measuring relays and protection equipment, including any combination of equipment to form a distributed protection scheme...
This document references:
IEC 61850-7-4 - Communication networks and systems for power utility automation - Part 7-4: Basic communication structure - Compatible logical node classes and data object classes
Published by IEC on February 1, 2020
General This part of IEC 61850 specifies the information model of devices and functions generally related to common use regarding applications in systems for power utility automation. It also...
This document references:
IEC 61850-9-2 - Communication networks and systems for power utility automation – Part 9-2: Specific communication service mapping (SCSM) – Sampled values over ISO/IEC 8802-3
Published by IEC on February 1, 2020
This part of IEC 61850 defines the specific communication service mapping (SCSM) for the transmission of sampled values according to the abstract specification in IEC 61850-7-2. The mapping is that...
This document references:
C37.2 - Electrical Power System Device Function Numbers, Acronyms, and Contact Designations
Published by IEEE on September 21, 2022
This standard applies to the definition and application of function numbers and acronyms for devices and functions used in electrical substations, generating plants, and in installations of power...
This document is referenced by:
CEI CLC/TS 50549-1 - Requirements for the connection of a generating plant to a distribution system Part 1: Connection to a LV distribution system and above 16 A
Published by CEI on June 1, 2015
The purpose of this Technical Specification is to provide technical guidance on the requirements for generating plants which can be operated in parallel with a distribution network. For practical...
This document is referenced by:
CEI EN 50549-2 - Requirements for generating plants to be connected in parallel with distribution networks Part 2: Connection to a MV distribution network - Generating plants up to and including Type B
Published by CEI on June 1, 2019
This document specifies the technical requirements for the protection functions and the operational capabilities for generating plants, intended to operate in parallel with MV distribution networks....
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