SN EN 62271-107 : 2005

1 General
   1.1 Scope
   1.2 Normative references
2 Normal and special service conditions
3 Terms and definitions
   3.1 General terms
   3.2 Assemblies of switchgear and controlgear
   3.3 Parts of assemblies
   3.4 Switching devices
   3.5 Parts of switchgear and controlgear
   3.6 Operation
   3.7 Characteristic quantities
4 Ratings
   4.1 Rated voltage (U[r])
   4.2 Rated insulation level
   4.3 Rated frequency (f[r])
   4.4 Rated normal current and temperature rise
   4.5 Rated short-time withstand current (I[k])
   4.6 Rated peak withstand current (I[p])
   4.7 Rated duration of short circuit (t[k])
   4.8 Rated supply voltage of closing and opening
        devices and of auxiliary and control circuits
        (U[a])
   4.9 Rated supply frequency of closing and opening
        devices and of auxiliary circuits
   4.10 Rated pressure of compressed gas supply for
        insulation and/or operation
5 Design and construction
   5.1 Requirements for liquids in fused
        circuit-switchers
   5.2 Requirements for gases in fused
        circuit-switchers
   5.3 Earthing of fused circuit-switchers
   5.4 Auxiliary and control equipment
   5.5 Dependent power operation
   5.6 Stored energy operation
   5.7 Independent manual operation
   5.8 Operation of releases
   5.9 Low- and high-pressure interlocking and
        monitoring devices
   5.10 Nameplates
   5.11 Interlocking devices
   5.12 Position indication
   5.13 Degrees of protection by enclosures
   5.14 Creepage distances
   5.15 Gas and vacuum tightness
   5.16 Liquid tightness
   5.17 Flammability
   5.18 Electromagnetic compatibility (EMC)
6 Type tests
   6.1 General
   6.2 Dielectric tests
   6.3 Radio interference voltage (RIV) tests
   6.4 Measurement of the resistance of circuits
   6.5 Temperature-rise tests
   6.6 Short-time withstand current and peak
        withstand current tests
   6.7 Verification of the protection
   6.8 Tightness tests
   6.9 Electromagnetic compatibility tests (EMC)
7 Routine tests
8 Guide for the selection of fused circuit-switchers
   8.1 Objective
   8.2 Short-circuit breaking current
   8.3 Rated maximum thermal current
   8.4 Currents between thermal current and I[3] of
        the fuses
   8.5 Transfer current
   8.6 Take-over current
   8.7 Extension of the validity of type tests
   8.8 Operation
   8.9 Comparison of performances of fused
        circuit-switchers with performances of
        switch-fuse combinations and circuit-breakers
9 Information to be given with enquiries, tenders
   and orders
   9.1 Information to be given with enquiries and orders
   9.2 Information to be given with tenders
10 Rules for transport, storage, installation, operation
   and maintenance
11 Safety
Annex A (informative) Applicability of the rated
                       take-over current test duty
Annex ZA (normative) Normative references to international
                       publications with their corresponding
                       European publications
Bibliography

Applicable to three-pole operated units for distribution systems that are functional assemblies of a circuit-switcher and current-limiting fuses.