IEC 60269-2-1:2004

FOREWORD
EXPLANATORY NOTE
1 General
2 Normative references
SECTION I - FUSES WITH FUSE-LINKS WITH BLADE CONTACTS
   1.1 Scope
2 Definitions
   5.2 Rated voltage
        5.3.1 Rated current of the fuse-link
        5.3.2 Rated current of the fuse-holder
   5.5 Rated power dissipation of a fuse-link and rated
        power acceptance of a fuse-holder
   5.6 Limits of time-current characteristics
        5.6.1 Time-current characteristics, time-current zones
               and overload curves
        5.6.2 Conventional times and currents
        5.6.3 Gates
6 Marking
   6.1 Markings of fuse-holders
   6.2 Markings of fuse-links
   7.1 Mechanical design
        7.1.2 Connections including terminals
        7.1.3 Fuse-contacts
        7.1.7 Construction of a fuse-link
   7.2 Insulating properties
   7.7 I[2]t characteristics
   7.8 Overcurrent discrimination of 'gG' fuse-links
   7.9 Protection against electric shock
        8.1.4 Arrangement of the fuse and dimensions
        8.1.6 Testing of fuse-holders
        8.2.2 Points of application of the test voltage
        8.2.3 Value of test voltage
        8.2.4 Test method
        8.2.5 Acceptability of test results
        8.2.6 Resistance to tracking
   8.3 Verification of temperature rise and power
        dissipation
        8.3.1 Arrangement of the fuse
               8.3.4.1 Temperature rise of the fuse-holder
               8.3.4.2 Power dissipation of a fuse-link
               8.3.4.1 Temperature rise of the fuse-holder
               8.4.3.5 Conventional cable overload protection
                        (for 'gG' fuse-links only)
               8.5.5.1 Verification of the peak withstand
                        current of a fuse-base
        8.5.8 Acceptability of test results
        8.7.4 Verification of overcurrent discrimination
   8.9 Verification of resistance to heat
        8.9.1 Fuse-base
        8.9.2 Fuse-links with gripping lugs of moulded material
               or of metal fixed in moulded material
   8.10 Verification of non-deterioration of contacts and
        direct terminal clamps
        8.10.1 Arrangement of the fuse
        8.10.2 Test method
        8.10.3 Acceptability of test results
   8.11 Mechanical and miscellaneous tests
Figures
Annex A (informative) Special test for cable overload protection
SECTION IA - FUSES WITH STRIKER FUSE-LINKS WITH BLADE
             CONTACTS
   1.1 Scope
   5.2 Rated voltage
        5.3.1 Rated current of the fuse-link
        5.3.2 Rated current of the fuse-holder
   5.5 Rated power dissipation of a fuse-link and rated
        power acceptance of a fuse-holder
   5.6 Limits of time-current characteristics
6 Marking
   7.1 Mechanical design
        7.1.2 Connections, including terminals
        7.1.3 Fuse-contacts
        7.1.7 Construction of a fuse-link
   7.7 12t characteristics
   7.8 Overcurrent discrimination of 'gG' fuse-links
   7.9 Protection against electric shock
        8.1.6 Testing of fuse-holders
   8.3 Verification of temperature rise and power dissipation
               8.4.3.6 Operation of indication devices and
                        strikers, if any
               8.5.5.1 Verification of the peak withstand
                        current of a fuse-base
        8.7.4 Verification of overcurrent discrimination
        8.9.1 Fuse-base
               8.9.1.1 Test arrangement
               8.9.1.2 Test method
               8.9.1.3 Acceptability of test results
               8.9.2.1 Test arrangement
               8.9.2.2 Test method
               8.9.2.3 Acceptability of test results
               8.11.1.2 Mechanical strength of the fuse-base
               8.11.1.8 Impact resistance of gripping-lugs of
                        moulded material or of metal fixed in
                        moulded material
Figures
SECTION IB - FUSE-RAILS (NH FUSE SYSTEM)
   1.1 Scope
   2.1.13 Fuse-rails
   5.2 Rated voltage
       5.3.2 Rated current
       5.5.1 Rated power acceptance
6 Markings
   7.1 Mechanical design
       7.1.2 Connections, including terminals
   7.2 Insulating properties
   8.3 Verification of temperature rise and power dissipation
       8.3.1 Arrangement of the fuse
             8.5.5.1 Verification of peak withstand current
                     of a fuse-base
             8.5.5.1.1 Arrangement of the fuse
             8.5.5.1.2 Test method
   8.10 Verification of non-deterioration of contacts and direct
        terminal clamps
        8.10.1 Arrangement of the fuse
             8.10.1.2 Direct terminal clamps
             8.11.1.2 Mechanical strength of the fuse-base
             8.11.2.4.1 Test method
Figures
SECTION IC - FUSE BASES FOR BUSBAR MOUNTING (40 MM-SYSTEM)
   1.1 Scope
        2.1.12 Fuse base for 40 mm busbar mounting
   5.2 Rated voltage
        5.3.2 Rated current
        5.5.2 Rated power acceptance of tandem fuse-bases
6 Markings
   7.1 Mechanical design
        7.1.2 Connections, including terminals
        7.1.5 Construction of a fuse-base for busbar mounting
   8.3 Verification of temperature rise and power dissipation
        8.3.1 Arrangement of the fuse
               8.3.4.1 Temperature rise of the fuse-holder
        8.9.1 Fuse-band
               8.9.1.1 Test arrangement
               8.9.1.3 Acceptance of test results
   8.10 Verification of non-deterioration of contacts and
        direct terminal clamps
        8.10.1 Arrangement of the fuse
        8.10.2 Test method
   8.11 Mechanical and miscellaneous tests
               8.11.1.2 Mechanical strength of the fuse-base
Figures
SECTION II - FUSES WITH FUSE-LINKS FOR BOLTED CONNECTIONS
   1.1 Scope
        5.3.1 Rated current of the fuse-link
        5.3.2 Rated current of the fuse-holder
   5.5 Rated power dissipation of a fuse-link and rated
        power acceptance of a fuse-holder
   5.6 Limits of time-current characteristics
        5.6.1 Time-current characteristics, time-current zones
               and overload curves
        5.6.2 Conventional times and currents
        5.6.3 Gates
        5.7.2 Rated breaking capacity
   7.1 Mechanical design
        7.1.2 Connections including terminals
   7.9 Protection against electric shock
   8.3 Verification of temperature rise and power dissipation
        8.3.1 Arrangement of the fuse
        8.3.3 Measurement of the power dissipation of the
               fuse-link
   8.4 Verification of operation
        8.4.1 Arrangement of the fuse
   8.5 Verification of breaking capacity
        8.5.1 Arrangement of the fuse
        8.5.8 Acceptability of test results
   8.10 Verification of non-deterioration of contacts
        8.10.1 Arrangement of the fuse
        8.10.2 Test method
        8.10.3 Acceptability of test results
Figures
SECTION III: FUSES WITH FUSE-LINKS HAVING CYLINDRICAL
             CONTACT CAPS
   1.1 Scope
   5.2 Rated voltage
        5.3.1 Rated current of the fuse-link
        5.3.2 Rated current of the fuse-holder
   5.5 Rated power dissipation of a fuse-link and rated
        power acceptance of a fuse-holder
   5.6 Limits of time-current characteristics
6 Marking
   7.1 Mechanical design
        7.1.2 Connections including terminals
   7.7 12t characteristics
   7.8 Overcurrent discrimination of 'gG' fuse-links
   7.9 Protection against electric shock
        8.1.6 Testing of fuse holders
        8.3.1 Arrangement of the fuse
               8.3.4.1 Temperature-rise of the fuse-holder
               8.3.4.2 Power dissipation of a fuse-link
        8.7.4 Verification of overcurrent discrimination
   8.10 Verification of non-deterioration of contacts
        8.10.1 Arrangement of the fuse
        8.10.2 Test method
        8.10.3 Acceptability of test results
Figures
SECTION IV - FUSES WITH FUSE-LINKS WITH OFFSET BLADE
             CONTACTS
   1.1 Scope
   5.2 Rated voltage
        5.3.1 Rated current of the fuse-link
        5.3.2 Rated current of the fuse-holder
   5.5 Rated power dissipation of a fuse-link and rated
        power acceptance of a fuse-holder
        5.6.1 Time current characteristics, time-current zones
        5.6.2 Conventional times and currents
        5.6.3 Gates
        5.7.2 Rated breaking capacity
   7.1 Mechanical design
        7.1.2 Connections including terminals
   7.7 I[2]t characteristics
   7.9 Protection against electric shock
        8.3.3 Measurement of the power dissipation of the
               fuse-link
               8.3.4.1 Temperature rise of the fuse-holder
        8.4.1 Arrangement of the fuse
        8.5.1 Arrangement of the fuse
        8.7.4 Verification of overcurrent discrimination
   8.10 Verification of non-deterioration of contacts
        8.10.1 Arrangement of the fuse
        8.10.2 Test method
        8.10.3 Acceptability of test results
Figures
SECTION V - FUSES WITH FUSE-LINKS HAVING 'gD' AND 'gN'
            CHARACTERISTICS
   1.1 Scope
   5.2 Rated voltage
        5.3.1 Rated current of the fuse-link
        5.3.2 Rated current of the fuse-holder
   5.5 Rated power dissipation of a fuse-link and rated
        power acceptance of a fuse-holder
   5.6 Limits of the time-current characteristics
        5.6.1 Time-current characteristics, time-current zones
        5.6.2 Conventional times and currents
        5.6.3 Gates
        5.7.2 Rated breaking capacity
   7.1 Mechanical design
   7.6 Cut-off current characteristics
   7.7 I[2]t characteristics
   7.9 Protection against electric shock
   8.3 Verification of temperature rise and power
        dissipation
        8.3.1 Arrangement of the fuse
               8.3.4.1 Temperature rise of the fuse-holder
               8.3.4.2 Power dissipation of a fuse-link
   8.4 Verification of operation
        8.4.1 Arrangement of the fuse
   8.6 Verification of cut-off current characteristics
   8.7 Verification of I2t characteristics and
        overcurrent discrimination
   8.10 Verification of non-deterioration of contacts
        8.10.1 Arrangement of the fuse
        8.10.2 Test method
        8.10.3 Acceptability of test results
        8.11.2 Miscellaneous tests
Figures
SECTION VI - gU FUSE-LINKS WITH WEDGE TIGHTENING CONTACTS
   1.1 Scope
   3.9 Discrimination of fuse-links
   5.2 Rated voltage
        5.3.1 Rated current of the fuse-link
   5.5 Rated power dissipation of a fuse link
        5.6.1 Time-current characteristics, time-current
               zones
        5.6.2 Conventional times and currents
        5.6.3 Gates
        5.7.2 Rated breaking capacity
   5.8 Cut off current and I[2]t characteristics
   7.1 Mechanical design
   7.5 Breaking capacity
   7.7 I[2]t characteristics
   7.8 0vercurrent discrimination off fuse-links
        8.1.1 Kind of tests
        8.3.1 Arrangement of the fuse
        8.3.3 Measurement of the power dissipation of the
               fuse link
        8.4.1 Arrangement of the fuse
        8.5.1 Arrangement of the fuse
        8.5.2 Characteristics of the test circuit
        8.5.5 Test method
        8.5.8 Acceptability of test results
        8.7.3 Verification of compliance for fuse-link at
               0,01 s
Figures

This standard is divided into six sections, each dealing with a specific example of standardized fuse for use by authorized persons: Section I: Fuses with fuse-links with blade contacts. Section II: Fuses with fuse-links for bolted connections. Section III: Fuses with fuse-links having cylindrical contact caps. Section IV: Fuses with fuse-links with offset blade contacts. Section V: Fuses with fuse-links having "gD" and "gN" characteristics. Section VI: "gV" fuse-links with wedge tightening contacts. NOTE - The following fuse systems are standardized systems in respect to their safety aspects.