I.S. EN 60909-3:2010
Current
The latest, up-to-date edition.
SHORT-CIRCUIT CURRENTS IN THREE-PHASE A.C SYSTEMS - PART 3: CURRENTS DURING TWO SEPARATE SIMULTANEOUS LINE-TO-EARTH SHORT-CIRCUITS AND PARTIAL SHORT-CIRCUIT CURRENTS FLOWING THROUGH EARTH
Hardcopy , PDF
English
01-01-2010
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FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Symbols
5 Calculation of currents during two separate
simultaneous line-to-earth short circuits
6 Calculation of partial short-circuit currents
flowing through earth in case of an unbalanced
short circuit
7 Reduction factor for overhead lines with earth wires
8 Calculation of current distribution and reduction factor
in case of cables with metallic sheath or shield earthed
at both ends
Annex A (informative) - Example for the calculation of two
separate simultaneous line-to-earth short-circuit currents
Annex B (informative) - Examples for the calculation of partial
short-circuit currents through earth
Annex C (informative) - Example for the calculation of the
reduction factor r[1] and the current distribution
through earth in case of a three-core cable
Annex D (informative) - Example for the calculation of the
reduction factor r[3] and the current distribution through
earth in case of three single-core cables
Annex ZA (normative) - Normative references to international
publications with their corresponding European
publications
Describes procedures for calculation of the prospective short-circuit currents with an unbalanced short circuit in high-voltage three-phase a.c. systems operating at nominal frequency 50 Hz or 60 or Hz.
| DevelopmentNote |
NSAI reissued 2010 PDF dated 19.02.2015 with IEC Corrigenda incorporated. (06/2017)
|
| DocumentType |
Standard
|
| Pages |
130
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Standards | Relationship |
| EN 60909-3:2010 | Identical |
| UNE-EN 60909-3:2011 | Identical |
| BS EN 60909-3:2010 | Identical |
| NBN EN 60909-3 : 2010 | Identical |
| SN EN 60909-3 : 2003 | Identical |
| (INACTIVE RECORD)DIN EN 60909-3 : 2010 COR 1 2014 | Identical |
| NF EN 60909-3 : 2010 | Identical |
| IEC 60909-3:2009 | Identical |
| IEC TR 60909-2:2008 | Short-circuit currents in three-phase a.c. systems - Part 2: Data of electrical equipment for short-circuit current calculations |
| IEC 60909-0:2016 | Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents |
| EN 60909-0:2016 | Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents |
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