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IEC TR 60909-2:2008

Current

Current

The latest, up-to-date edition.

Short-circuit currents in three-phase a.c. systems - Part 2: Data of electrical equipment for short-circuit current calculations

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, Spanish, Castilian

Published date

13-11-2008

FOREWORD
1 General
  1.1 Scope and object
  1.2 Normative references
2 Data for electrical equipment
  2.1 General
  2.2 Data of typical synchronous machines
  2.3 Data of typical two-winding, three-winding and
      auto-transformers
  2.4 Data of typical overhead lines, single and double
      circuits
  2.5 Data of typical high-voltage, medium-voltage and
      low-voltage cables
  2.6 Data of typical asynchronous motors
  2.7 Busbars
Annex A (informative) Information from National
        Committees
Bibliography

IEC 60909-2:2008(E) comprises data of electrical equipment collected from different countries to be used when necessary for the calculation of short-circuit currents in accordance with IEC 60909-0. It may be applied for calculating short-circuit currents in low-voltage networks if they are in accordance with typical equipment employed in the user's country. The collected data and their evaluation may be used for medium- or high-voltage planning purposes and also for comparison with data given by manufacturers or electricity suppliers. For overhead lines and cables the electrical data may in some cases also be calculated from the physical dimensions and the material following the equations given in this report. This second edition cancels and replaces the first edition published in 1992 and constitutes a technical revision. The significant technical changes with respect to the previous edition are as follows:
- Subclause 2.5 gives equations and examples for the calculation of the positive-, the negative- and the zero-sequence impedances and reduction factors for high-, medium and low-voltage cables with sheaths and shields earthed at both ends.
- Subclause 2.7 gives equations and figures for the calculation of the positive-sequence impedances of busbar configurations.

Committee
TC 73
DevelopmentNote
To be read in conjunction with IEC 60909-0 and IEC 60909-3. Supersedes IEC 60909-2. (11/2008) Stability Date: 2015. (10/2012)
DocumentType
Technical Report
Pages
43
PublisherName
International Electrotechnical Committee
Status
Current
Supersedes

CEI EN 60027-7 : 2011 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 7: POWER GENERATION, TRANSMISSION AND DISTRIBUTION
CEI EN 60909-3 : 2011 SHORT-CIRCUIT CURRENTS IN THREE-PHASE A/C SYSTEMS - PART 3: CURRENTS DURING TWO SEPARATE SIMULTANEOUS LINE-TO-EARTH SHORTCIRCUITS AND PARTIAL SHORT-CIRCUIT CURRENTS FLOWING THROUGH EARTH
NF EN 60027-7 : 2011 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 7: POWER GENERATION, TRANSMISSION AND DISTRIBUTION
12/30270636 DC : 0 BS EN 60909-0 - SHORT-CIRCUIT CURRENTS IN THREE-PHASE A.C. SYSTEMS - PART 0: CALCULATION OF CURRENTS
IEC 60909-3:2009 Short-circuit currents in three-phase AC systems - Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth
I.S. EN 60909-3:2010 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
I.S. EN 60027-7:2010 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 7: POWER GENERATION, TRANSMISSION AND DISTRIBUTION
IEC 60909-3:2009 RLV Short-circuit currents in three-phase AC systems - Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth
IEC 60027-7:2010 Letter symbols to be used in electrical technology - Part 7: Power generation, transmission and distribution
BS EN 60909-3:2010 Short-circuit currents in three-phase a.c systems Currents during two separate simultaneous line-to-earth short-circuits and partial short-circuit currents flowing through earth
BS EN 60027-7:2010 Letter symbols to be used in electrical technology Power generation, transmission and distribution
EN 60027-7:2010 Letter symbols to be used in electrical technology - Part 7: Power generation, transmission and distribution
EN 60909-3:2010 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

IEC 60038:2009 IEC standard voltages
IEC 60909-3:2009 Short-circuit currents in three-phase AC systems - Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth
IEC TR 60909-1:2002 Short-circuit currents in three-phase a.c. systems - Part 1: Factors for the calculation of short-circuit currents according to IEC 60909-0
IEC 60909-0:2016 Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents
IEC TR 60909-4:2000 Short-circuit currents in three-phase a.c. systems - Part 4: Examples for the calculation of short-circuit currents

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