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  • BSI
    BS EN 60255-121:2014 Measuring relays and protection equipment - Functional requirements for distance protection
    Edition: 2014
    $553.89
    / user per year

Description of BS EN 60255-121:2014 2014

IEC 60255-121:2014 specifies minimum requirements for functional and performance evaluation of distance protection function typically used in, but not limited to, line applications for effectively earthed, three-phase power systems. This standard also defines how to document and publish performance tests. This standard covers distance protection function whose operating characteristic can be defined on an impedance plane and includes specification of the protection function, measurement characteristics, phase selection, directionality, starting and time delay characteristics. The test methodologies for verifying performance characteristics and accuracy are included in this standard. The standard defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions. It also includes the instrument transformer requirements for the protection function. The general requirements for measuring relays and protection equipment are defined in IEC 60255-1.

Standard NumberBS EN 60255-121:2014
TitleMeasuring relays and protection equipment - Functional requirements for distance protection
StatusDefinitive
Publication Date2014-07-31
Identical National Standard OfEN 60255-121 (IEC 60255-121:2014) AS, IEC 60255-121:2014
DescriptorsTransient response, Length, Instrument transformers, Electromagnetic compatibility, Measuring relays, Electrical protection equipment, Voltage regulators
ICS29.120.70 Relays
CommitteePEL/95
ISBN978 0 580 70318 8
PublisherBSI
Pages152



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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