• IEC 60947-7-2:2009

    Current The latest, up-to-date edition.

    Low-voltage switchgear and controlgear - Part 7-2: Ancillary equipment - Protective conductor terminal blocks for copper conductors

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    Language(s):  English - French, Spanish, Castilian

    Published date:  20-04-2009

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    FOREWORD
    1 General
      1.1 Scope
      1.2 Normative references
    2 Definitions
    3 Classification
    4 Characteristics
      4.1 Summary of characteristics
      4.2 Type of protective conductor terminal block
      4.3 Rated and limiting values
          4.3.2 Short-time withstand current
          4.3.3 Standard cross-sections
          4.3.4 Rated cross-section
          4.3.5 Rated connecting capacity
    5 Product information
      5.1 Marking
      5.2 Additional information
    6 Normal service, mounting and transport conditions
    7 Constructional and performance requirements
      7.1 Constructional requirements
          7.1.1 Clamping units
          7.1.2 Connection of support
          7.1.3 Clearance and creepage distances
          7.1.4 Terminal block identification and marking
          7.1.5 Resistance to abnormal heat and fire
          7.1.6 Rated cross-section and rated connecting capacity
          7.1.7 Protective conductor mounting rails
      7.2 Performance requirements
          7.2.1 Temperature rise
          7.2.2 Dielectric properties
          7.2.3 Short-time withstand current
          7.2.4 Voltage drop
          7.2.5 Electrical performance after ageing (for
                screwless-type protective conductor
                terminal blocks only)
      7.3 Electromagnetic compatibility (EMC)
    8 Tests
      8.1 Kinds of test
      8.2 General
      8.3 Verification of mechanical characteristics
      8.4 Verification of electrical characteristics
          8.4.1 General
          8.4.3 Dielectric tests
          8.4.4 Verification of the voltage drop
          8.4.5 Temperature-rise test
          8.4.6 Short-time withstand current test
          8.4.7 Ageing test (for screwless-type terminal blocks
                only)
      8.5 Verification of thermal characteristics
      8.6 Verification of EMC characteristics
    Annex A (normative) Maximum short-time withstand currents
            allocated to the rail profile and thermal rated
            current of a PEN busbar

    Abstract - (Show below) - (Hide below)

    IEC 60947-7-2:2009 specifies requirements for protective conductor terminal blocks with PE function up to 120 mm2 (250 kcmil) and for protective conductor terminal blocks with PEN function equal to and above 10 mm2 (AWG 8) with screw-type or screwless-type clamping units, primarily intended for industrial applications. Protective conductor terminal blocks are used to form the electrical and mechanical connection between copper conductors and the fixing support. lt is applicable to protective conductor terminal blocks for the connection of round copper conductors with or without special preparation having a cross-section between 0,2 mm2 and 120 mm2 (AWG 24 and 250 kcmil), intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V d.c., most commonly in conjunction with terminal blocks according to IEC 60947-7-1. This standard may be used as guide for
    - protective conductor terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.;
    - protective conductor terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etc.
    Where applicable in this standard, the term "clamping unit" has been used instead of the term "terminal". This is taken into account in case of reference to IEC 60947-1. The main technical modifications of this standard since this previous publication are listed below:
    - requirements for tightening torques for the tests improved and referenced to Table 4 of IEC 60947-1, Annex B deleted;
    - the wording of the short-time withstand current test improved in 8.4.6.

    This publication shall be read in conjunction with IEC 60947-1:2007 and IEC 60947-7-1:2009.

    General Product Information - (Show below) - (Hide below)

    Committee TC 121/SC 121A
    Development Note To be read in conjunction with IEC 60947-1 and IEC 60947-7-1. (08/2002) Stability Date: 2022. (09/2017)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    CSA C22.2 No. 60079-7 : 2016 EXPLOSIVE ATMOSPHERES - PART 7: EQUIPMENT PROTECTION BY INCREASED SAFETY 'E'
    BS EN 62683-1 : 2017 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PRODUCT DATA AND PROPERTIES FOR INFORMATION EXCHANGE - PART 1: CATALOGUE DATA (IEC 62683-1:2017)
    BS EN 60715:2017 Dimensions of low-voltage switchgear and controlgear. Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories
    NF EN 60079-15 : 2010 EXPLOSIVE ATMOSPHERES - PART 15: EQUIPMENT PROTECTION BY TYPE OF PROTECTION 'N'
    I.S. EN 60694:1999 COMMON SPECIFICATIONS FOR HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR STANDARDS
    I.S. EN 62683-1:2017 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PRODUCT DATA AND PROPERTIES FOR INFORMATION EXCHANGE - PART 1: CATALOGUE DATA
    EN 62271-1:2017 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: COMMON SPECIFICATIONS FOR ALTERNATING CURRENT SWITCHGEAR AND CONTROLGEAR (IEC 62271-1:2017)
    IEC 62683-1:2017 Low-voltage switchgear and controlgear - Product data and properties for information exchange - Part 1: Catalogue data
    IEC 60079-7:2015+AMD1:2017 CSV Explosive atmospheres - Part 7: Equipment protection by increased safety "e"
    EN IEC 60079-7:2015/A1:2018 EXPLOSIVE ATMOSPHERES - PART 7: EQUIPMENT PROTECTION BY INCREASED SAFETY 'E' (IEC 60079-7:2015/A1:2017)
    IEC 60694:1996+AMD1:2000+AMD2:2001 CSV Common specifications for high-voltage switchgear and controlgear standards
    BS EN 62477-1 : 2012 SAFETY REQUIREMENTS FOR POWER ELECTRONIC CONVERTER SYSTEMS AND EQUIPMENT - PART 1: GENERAL (IEC 62477-1:2012)
    EN 60694:1996/A2:2001 COMMON SPECIFICATIONS FOR HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR STANDARDS
    EN 62683:2015 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PRODUCT DATA AND PROPERTIES FOR INFORMATION EXCHANGE (IEC 62683:2015)
    12/30235292 DC : 0 BS EN 50343 - RAILWAY APPLICATIONS - ROLLING STOCK - RULES FOR INSTALLATION OF CABLING
    05/30139105 DC : DRAFT SEP 2005 IEC 61800-5-1 ED 2 - ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-1: SAFETY REQUIREMENTS - ELECTRICAL, THERMAL AND ENERGY
    04/30111859 DC : 0 IEC 62271-1 - HIGH-VOLTAGE SWITCHGEAR AND CONTROL GEAR - PART 1: COMMON SPECIFICATIONS
    I.S. EN 62477-1:2012 SAFETY REQUIREMENTS FOR POWER ELECTRONIC CONVERTER SYSTEMS AND EQUIPMENT - PART 1: GENERAL
    BS EN 60079-7 : 2015 EXPLOSIVE ATMOSPHERES - PART 7: EQUIPMENT PROTECTION BY INCREASED SAFETY 'E' (IEC 60079-7:2015)
    EN 62683-1 : 2017 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PRODUCT DATA AND PROPERTIES FOR INFORMATION EXCHANGE - PART 1: CATALOGUE DATA (IEC 62683-1:2017)
    I.S. EN 60079-15:2010 EXPLOSIVE ATMOSPHERES - PART 15: EQUIPMENT PROTECTION BY TYPE OF PROTECTION 'N'
    I.S. EN 62683:2015 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PRODUCT DATA AND PROPERTIES FOR INFORMATION EXCHANGE
    CEI EN 50343 : 2015 RAILWAY APPLICATIONS - ROLLING STOCK - RULES FOR INSTALLATION OF CABLING
    CSA C22.2 No. 60079-15 : 2016 EXPLOSIVE ATMOSPHERES - PART 15: EQUIPMENT PROTECTION BY TYPE OF PROTECTION 'N'
    CEI EN 60079-15 : 2012 EXPLOSIVE ATMOSPHERES - PART 15: EQUIPMENT PROTECTION BY TYPE OF PROTECTION 'N'
    IEC 62271-1:2017 High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear and controlgear
    I.S. EN 61800-5-1:2007 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-1: SAFETY REQUIREMENTS - ELECTRICAL, THERMAL AND ENERGY
    EN 60079-15:2010 EXPLOSIVE ATMOSPHERES - PART 15: EQUIPMENT PROTECTION BY TYPE OF PROTECTION "N"
    EN 61800-5-1:2007/A1:2017 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-1: SAFETY REQUIREMENTS - ELECTRICAL, THERMAL AND ENERGY (IEC 61800-5-1:2007/A1:2016)
    14/30278882 DC : 0 BS EN 60079-7 IEC 60079-7 ED. 5.0 - EXPLOSIVE ATMOSPHERES - PART 7: EQUIPMENT PROTECTION BY INCREASED SAFETY 'E'
    16/30336111 DC : 0 BS EN 60715 ED 2.0 - DIMENSIONS OF LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - STANDARDIZED MOUNTING ON RAILS FOR MECHANICAL SUPPORT OF SWITCHGEAR, CONTROLGEAR AND ACCESSORIES
    IEC TR 63054:2017 Low-voltage switchgear and controlgear - Fire risk analysis and risk reduction measures
    15/30265353 DC : 0 BS EN 62271-1 ED 2 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: COMMON SPECIFICATIONS FOR ALTERNATING CURRENT SWITCHGEAR AND CONTROLGEAR
    BS EN 50343 : 2014 RAILWAY APPLICATIONS - ROLLING STOCK - RULES FOR INSTALLATION OF CABLING
    BS EN 62271-1:2017 High-voltage switchgear and controlgear Common specifications for alternating current switchgear and controlgear
    I.S. EN 60715:2017 DIMENSIONS OF LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - STANDARDIZED MOUNTING ON RAILS FOR MECHANICAL SUPPORT OF SWITCHGEAR, CONTROLGEAR AND ACCESSORIES
    BIS IS/IEC 62271-1 : 2007 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: COMMON SPECIFICATIONS
    BS EN 60079-15 : 2010 EXPLOSIVE ATMOSPHERES - PART 15: EQUIPMENT PROTECTION BY TYPE OF PROTECTION 'N'
    BS EN 62683:2015 Low-voltage switchgear and controlgear. Product data and properties for information exchange
    IEC 60715:2017 Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories
    EN 60715 : 2017 DIMENSIONS OF LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - STANDARDIZED MOUNTING ON RAILS FOR MECHANICAL SUPPORT OF SWITCHGEAR, CONTROLGEAR AND ACCESSORIES
    BS EN 61800-5-1:2007 Adjustable speed electrical power drive systems Safety requirements. Electrical, thermal and energy
    15/30259978 DC : 0 BS EN 62477-2 - SAFETY REQUIREMENTS FOR POWER ELECTRONIC CONVERTER SYSTEMS AND EQUIPMENT - PART 2: POWER ELECTRONIC CONVERTERS FROM 1000 V A.C. OR 1500 V D.C. UP TO 36 KV A.C. OR 54 KV D.C.
    08/30176298 DC : DRAFT JAN 2008 BS EN 62477-1 - SAFETY REQUIREMENTS FOR POWER SEMICONDUCTOR CONVERTER SYSTEMS - PART 1: GENERAL
    IEC TS 60204-34:2016 Safety of machinery - Electrical equipment of machines - Part 34: Requirements for machine tools
    I.S. EN 50343:2014 RAILWAY APPLICATIONS - ROLLING STOCK - RULES FOR INSTALLATION OF CABLING
    IEC 62477-1:2012+AMD1:2016 CSV Safety requirements for power electronic converter systems and equipment - Part 1: General
    13/30292412 DC : 0 BS EN 62683 - PRODUCT DATA AND PROPERTIES FOR INFORMATION EXCHANGE
    ISO 22734-2:2011 Hydrogen generators using water electrolysis process Part 2: Residential applications
    BS ISO 22734-2 : 2011 HYDROGEN GENERATORS USING WATER ELECTROLYSIS PROCESS - PART 2: RESIDENTIAL APPLICATIONS
    UNE-EN 60079-15:2013 Explosive atmospheres -- Part 15: Equipment protection by type of protection "n"
    BS PD IEC TR 63054 : 2017 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - FIRE RISK ANALYSIS AND RISK REDUCTION MEASURES
    BS EN 60694 : 1997 COMMON SPECIFICATION FOR HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR STANDARDS
    UNE-EN 62683:2016 Low-voltage switchgear and controlgear - Product data and properties for information exchange
    BIS IS/IEC 60079-7 : 2006 EXPLOSIVE ATMOSPHERES - PART 7: EQUIPMENT PROTECTION BY INCREASED SAFETY 'E'
    I.S. EN 60079-7:2015 EXPLOSIVE ATMOSPHERES - PART 7: EQUIPMENT PROTECTION BY INCREASED SAFETY 'E'
    NF EN 61800 5-1 : 2007 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-1: SAFETY REQUIREMENTS - ELECTRICAL, THERMAL AND ENERGY
    I.S. EN 62271-1:2017 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: COMMON SPECIFICATIONS FOR ALTERNATING CURRENT SWITCHGEAR AND CONTROLGEAR
    EN 62477-1:2012/A1:2017 SAFETY REQUIREMENTS FOR POWER ELECTRONIC CONVERTER SYSTEMS AND EQUIPMENT - PART 1: GENERAL (IEC 62477-1:2012/A1:2016)
    BS ISO 22734-1 : 2008 HYDROGEN GENERATORS USING WATER ELECTROLYSIS PROCESS - PART 1: INDUSTRIAL AND COMMERCIAL APPLICATIONS
    ISO 22734-1:2008 Hydrogen generators using water electrolysis process Part 1: Industrial and commercial applications
    15/30322229 DC : 0 BS EN 61800-5-1:2007/AMD 1 - ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-1: SAFETY REQUIREMENTS - ELECTRICAL, THERMAL AND ENERGY
    UNE-ISO 22734-1:2012 Hydrogen generators using water electrolysis process. Part 1: Industrial and commercial applications
    EN 50343 : 2014 AMD 1 2017 RAILWAY APPLICATIONS - ROLLING STOCK - RULES FOR INSTALLATION OF CABLING

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 60947-7-1:2009 Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for copper conductors
    IEC 60715:2017 Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories
    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
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