| Publication CODE |
Title |
| IEC 60255-121:2014 (2014-03) |
MEASURING RELAYS AND PROTECTION EQUIPMENT - PART 121: FUNCTIONAL REQUIREMENTS FOR DISTANCE PROTECTION |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
424.00 €
|
302. |
Description
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.
|
| Class |
C990
(IEC PUBLICATIONS IEC PUBLICATIONS)
|
| Committee |
TC 95
MEASURING RELAYS AND PROTECTION EQUIPMENT
|
| Responsible |
Ir DELENS Marc
|
| BEC Approval |
2014-03-07 |
| ICS-Code (International Standards Classification) |
29.120.70
|
| NBN Status |
New |
|
| IEC publication date |
2014-03-07 |
| IEC stability date |
2020-12-31 |
| IEC last modification date |
2019-01-09 |
|
