SN EN 60269-1 : 1998

Foreword
1 General
   1.1 Scope and object
   1.2 Normative references
2 Definitions
   2.1 Fuses and their component parts
   2.2 General terms
   2.3 Characteristics quantities
3 Conditions for operation in service
   3.1 Ambient air temperature
   3.2 Altitude
   3.3 Atmospheric conditions
   3.4 Voltage
   3.5 Current
   3.6 Frequency, power factor and time constant
   3.7 Conditions of installation
   3.8 Utilization category
   3.9 Discrimination of fuse-links
4 Classification
5 Characteristics of fuses
   5.1 Summary of characteristics
   5.2 Rated voltage
   5.3 Rated current
   5.4 Rated frequency
   5.5 Rated power dissipation of a fuse-link and rated 0026
        power acceptance of a fuse-holder
   5.6 Limits of time-current characteristics
   5.7 Breaking range and breaking capacity
   5.8 Cut-off current and characteristics
6 Markings
   6.1 Markings of fuse-holders
   6.2 Markings of fuse-links
   6.3 Marking symbols
7 Standard conditions for construction
   7.1 Mechanical design
   7.2 Insulation properties
   7.3 Temperature rise, power dissipation of the fuse-link
        and power acceptance of the fuse-holder
   7.4 Operation
   7.5 Breaking capacity
   7.6 Cutt-off current characteristics
   7.7 I(2)t characteristics
   7.8 Overcurrent discrimination of use-links
   7.9 Protection against electric shock
   7.10 Resistance to heat
   7.11 Mechanical strength
   7.12 Resistance to corrosion
   7.13 Resistance to abnormal heat and fire
   7.14 Electromagnetic compatibility
8 Tests
   8.1 General
   8.2 Verification of the insulating properties
   8.3 Verification of temperature rise and power dissipation
   8.4 Verification of operation
   8.5 Verification of the breaking capacity
   8.6 Verification of the cut-off current characteristics
   8.7 Verification of I(2)t characteristics and overcurrent
        discrimination
   8.8 Verification of the degree of protection of enclosures
   8.9 Verification of resistance to heat
   8.10 Verification of non-deterioration of contacts
   8.11 Mechanical and miscellaneous tests
Annex A (informative) Measurement of short-circuit power factor 006
Annex B (informative) Calculation of pre-arcing I(2)t values
        for "gG", "gM", "gD" and "gN" fuse-links
Annex C (informative) Calculation of cut-off current-time
        characteristics
Annex D (informative) Effect of change of ambient temperature
        or surroundings on the performance of fuse-links
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Applies to fuses incorporating enclosed current-limiting fuse-links with rated breaking capacities of not less than 6 kA, intended for protecting power-frequency a.c. circuits of nominal voltages not exceeding 1 000 V or d.c. circuits of nominal voltages not exceeding 1 500 V.