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IEC TR 61912-1:2007

IEC TR 61912-1:2007

Current

Current

The latest, up-to-date edition.

Low-voltage switchgear and controlgear - Overcurrent protective devices - Part 1: Application of short-circuit ratings

Available format(s)

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

Language(s)

English - French

Published date

08-23-2007

Publisher

International Electrotechnical Committee

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Alphabetical list of definitions and characteristics
4 Principle of application - Installation
5 Characteristics - Low-voltage assemblies (switchboard,
  distribution board, etc.)
6 Characteristics - Switching devices
  6.1 General
  6.2 Switching devices - Self-protection against short-circuit
  6.3 Switching devices - Application as SCPD
      6.3.1 Fuse-combination units and fuses as SCPD
      6.3.2 Circuit-breakers to IEC 60947-2 as SCPD
      6.3.3 Control and protective switching devices (CPS)
            according to IEC 60947-6-2 as SCPD
      6.3.4 Circuit-breakers according to IEC 60898-1 (MCBs)
            and residual current operated circuit-breaker with
            integral overcurrent protection (RCBOs) according
            to IEC 61009-1 as SCPD
7 Examples of the practical application of the product
  characteristics
  7.1 General
  7.2 Protection of cables
  7.3 Short-circuit protection for LV assemblies
      7.3.1 Switchgear and controlgear assemblies
            (switchboard/motor-control centre (MCC))
      7.3.2 Busbar trunking systems (BTS)
  7.4 Short-circuit protection for contactors and starters
      7.4.1 General
      7.4.2 Protected switching device and protected starter
      7.4.3 Control and protective switching device (CPS)
            according to IEC 60947-6-2
  7.5 Short-circuit protection using circuit-breakers for
      household and similar installations according to
      IEC 60898-1 (usually known as MCBs) and residual
      current operated circuit-breakers with integral
      overcurrent protection (RCBOs) according to
      IEC 61009-1
Annex A (informative) Interpolation of the suitability of an
        alternative SCPD for the protection of contactors and
        starters (substitution)
Bibliography

This technical report, which serves as an application guide for the short-circuit ratings given in IEC standards for low-voltage switchgear and controlgear and assemblies, summarises the definitions of the ratings and provides examples of their application. This edition cancels and replaces the first edition of IEC 61912, published in 2006, and corrigendum 1 (May 2006). The changes are only editorial.

Committee
TC 121/SC 121A
DevelopmentNote
Supersedes IEC TR 61912. (08/2007) Stability Date: 2015. (10/2012)
DocumentType
Technical Report
Pages
44
PublisherName
International Electrotechnical Committee
Status
Current

UNE-HD 50573.5.57:2014 Co-ordination of electrical equipment for protection, isolation, switching and control
EN 61439-1:2011 Low-voltage switchgear and controlgear assemblies - Part 1: General rules
CLC/TR 60269-5:2011 Low-voltage fuses - Part 5: Guidance for the application of low-voltage fuses
IEC TR 61912-2:2009 Low-voltage switchgear and controlgear - Over-current protective devices - Part 2: Selectivity under over-current conditions
EN 60947-1:2007/A2:2014 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: GENERAL RULES (IEC 60947-1:2007/A2:2014)
I.S. HD 50573-5-57:2014 CO-ORDINATION OF ELECTRICAL EQUIPMENT FOR PROTECTION, ISOLATION, SWITCHING AND CONTROL
PD IEC/TR 61912-2:2009 Low-voltage switchgear and controlgear. Over-current protective devices Selectivity under over-current conditions
IEC TR 60269-5:2014 Low-voltage fuses - Part 5: Guidance for the application of low-voltage fuses
I.S. EN 61439-1:2011 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - PART 1: GENERAL RULES (IEC 61439-1:2011)
IEC 60204-1:2016 Safety of machinery - Electrical equipment of machines - Part 1: General requirements
UNE-HD 60364-5-53:2016 Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Switchgear and controlgear
BS EN 60947-1 : 2007 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: GENERAL RULES
S.R. HD 60364-5-53:2015 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 5-53: SELECTION AND ERECTION OF ELECTRICAL EQUIPMENT - SWITCHGEAR AND CONTROLGEAR
IEC 61439-1:2011 Low-voltage switchgear and controlgear assemblies - Part 1: General rules
09/30204029 DC : 0 BS EN 61439-1 - LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - PART 1: GENERAL RULES
IEC 60947-1:2007+AMD1:2010+AMD2:2014 CSV Low-voltage switchgear and controlgear - Part 1: General rules
IEC 61439-1:2020 Low-voltage switchgear and controlgear assemblies - Part 1: General rules
16/30301661 DC : 0 BS EN 61439-1 ED3.0 - LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - PART 1: GENERAL RULES
I.S. EN 60947-1:2007 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: GENERAL RULES
HD 50573-5-57:2014 Co-ordination of electrical equipment for protection, isolation, switching and control
S.R. CLC/TR 60269-5:2011 LOW-VOLTAGE FUSES - PART 5: GUIDANCE FOR THE APPLICATION OF LOW-VOLTAGE FUSES
UNE-EN 61439-1:2012 Low-voltage switchgear and controlgear assemblies - Part 1: General rules
PD IEC/TR 60269-5:2010 Low-voltage fuses Guidance for the application of low-voltage fuses
BS EN 61439-1:2011 Low-voltage switchgear and controlgear assemblies General rules
HD 60364-5-53:2015/A11:2017 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 5-53: SELECTION AND ERECTION OF ELECTRICAL EQUIPMENT - SWITCHGEAR AND CONTROLGEAR

IEC 60947-6-2:2002+AMD1:2007 CSV Low-voltage switchgear and controlgear - Part 6-2: Multiple function equipment - Control and protective switching devices (or equipment) (CPS)
IEC 60947-4-1:2009+AMD1:2012 CSV Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
IEC 60439-2:2000+AMD1:2005 CSV Low-voltage switchgear and controlgear assemblies - Part 2: Particular requirements for busbar trunking systems (busways)
IEC 60269-1:2006+AMD1:2009+AMD2:2014 CSV Low-voltage fuses - Part 1: General requirements
IEC 61009-1:2010+AMD1:2012+AMD2:2013 CSV Residual current operated circuit-breakers with integral overcurrentprotection for household and similar uses (RCBOs) - Part 1: General rules
IEC 60947-1:2007+AMD1:2010+AMD2:2014 CSV Low-voltage switchgear and controlgear - Part 1: General rules
IEC 60439-1:1999+AMD1:2004 CSV Low-voltage switchgear and controlgear assemblies - Part 1: Type-tested and partially type-tested assemblies
IEC 60898-1:2015 Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a.c. operation
IEC 60947-3:2008+AMD1:2012+AMD2:2015 CSV Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
IEC 60947-2:2016 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers

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Hardcopy - English - French
PDF - English - French
PDF 3 Users - English - French
PDF 5 Users - English - French
PDF 9 Users - English - French
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