IEC 62271-108:2005

FOREWORD
1 General
   1.1 Scope and object
   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
   4.2 Rated insulation level
   4.112 Rated static terminal load
5 Design and construction
   5.10 Nameplates
   5.11 Interlocking devices
   5.12 Position indication
   5.102 Requirements in respect of the isolating distance
           of disconnecting circuit-breakers
           5.104.1 Securing of position
           5.104.2 Additional requirements for power operated
                   mechanisms
6 Type tests
   6.1 General
   6.2 Dielectric tests
   6.3 Radio interference (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 the degree of protection
   6.8 Tightness tests
   6.9 Electromagnetic compatibility 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 procedure
   6.106 Basic short-circuit test-duties
   6.107 Critical current tests
   6.108 Single-phase and double-earth fault tests
   6.109 Short-line fault tests
   6.110 Out-of-phase making and breaking tests
   6.111 Capacitive current switching tests
   6.112 Special requirements for making and breaking tests
           on class E2 disconnecting circuit-breakers
   6.113 Tests to verify the proper function of the position
           indicating device
   A.6.105 Tests to verify the proper function of the position
           indicating device
   6.114 Combined function test
7 Routine tests
8 Guide to the selection of disconnecting circuit-breakers for
   service
9 Information to be given with enquires, tenders and orders
10 Rules for transport, storage, installation, operation and
   maintenance
11 Safety
Annex A (informative) Explanatory notes and examples of
                      disconnecting circuit-breakers
Bibliography

This part of IEC 62271 applies to high-voltage alternating current disconnecting circuit-breakers for operation at frequencies of 50 Hz and 60 Hz on systems having voltages of 72,5 kV and above.This standard identifies which requirements of IEC 60694, IEC 62271-100 and IEC 62271-102 standards are applicable. It also gives the additional requirements specific to these devices.This standard covers a circuit-breaker which, when in the open position, satisfies the requirements of both a circuit-breaker and a disconnector.