SN EN 62271-110 : 2005

FOREWORD
1 General
   1.1 Scope
   1.2 Normative references
2 Normal and special service conditions
3 Definitions
4 Ratings
   4.1 Rated voltage (U[r])
   4.2 Rated insulation level
   4.3 Rated frequency (f[r])
   4.4 Rated normal current (I[r]) 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 auxiliary circuits
   4.10 Rated pressure of compressed gas supply for
         insulation, operation and/or interruption
5 Design and construction
6 Type tests
   6.1 General
   6.2 Dielectric test
   6.3 Radio interference voltage (r.i.v.) tests
   6.4 Measurement of the resistance of the main circuit
   6.5 Temperature-rise tests
   6.6 Short-time withstand current and peak withstand
         current tests
   6.7 Verification of protection
   6.8 Tightness tests
   6.9 Electromagnetic compatibility (EMC) tests
   6.101 Mechanical and environmental tests
   6.102 Miscellaneous provisions for making and
         breaking tests
   6.103 Test circuits for short-circuit making and
         breaking tests
   6.104 Short-circuit test quantities
   6.105 Short-circuit test procedures
   6.106 Basic short-circuit test duties
   6.107 Critical current tests
   6.108 Single-phase and double-earth fault tests
   6.114 High-voltage motor current switching tests
   6.115 Shunt reactor current switching tests
7 Routine tests
8 Guide to selection of circuit-breakers for service
9 Information to be given with enquiries, tenders and
   orders
10 Rules for transport, storage, installation, operation
   and maintenance
11 Safety
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications
Bibliography

Applies to a.c. circuit-breakers designed for indoor or outdoor installation, for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above 1000 V and applied for inductive current switching with or without additional short-circuit current breaking duties.