IEC 60517:1990

FOREWORD
Clause
1 Scope
2 Normal and special service conditions
3 Definitions
4 Rating
   4.1 Rated voltage
   4.2 Rated insulation level
   4.3 Rated frequency
   4.4 Rated normal current and temperature rise
   4.5 Rated short-time withstand current
   4.6 Rated peak withstand current
   4.7 Rated duration of short-circuit
   4.8 Rated supply voltage of closing and opening devices
         and auxiliary circuits
   4.9 Rated supply frequency of opening devices and
         auxiliary circuits
   4.10 Rated pressure of compressed gas supply for
         operating mechanisms
   4.101 Rated density of gas for insulation
5 Design and construction
   5.1 Requirements for liquids in switchgear and controlgear
   5.2 Requirements for gases in switchgear and controlgear
   5.3 Earthing
   5.4 Auxiliary equipment
   5.5 Dependent power closing
   5.6 Stored energy closing
   5.7 Operation of releases
   5.8 Low and high pressure interlocking devices
   5.9 Nameplates
   5.101 Degree of protection
   5.102 Internal fault
   5.103 Enclosures
   5.104 Partitions
   5.105 Pressure relief
   5.106 Disconnectors and earthing switches
   5.107 Interlocks
   5.108 Noise
   5.109 Provisions far dielectric tests on cables
6 Type tests
   6.1 Dielectric tests
   6.2 Radio interference voltage (RIV) tests
   6.3 Temperature-rise tests
   6.4 Measurement of the resistance of the main circuit
   6.5 Short-time and peak withstand current tests
   6.101 Verification of making and breaking capacities
   6.102 Mechanical operation tests
   6.103 Verification of the degree of protection for
         auxiliary circuits and moving parts
   6.104 Proof tests for enclosures
   6.105 Weatherproofing test
   6.106 Test under conditions of arcing due to an internal
         fault
   6.107 Thermal stability test
   6.108 Operation tests at limit temperatures
   6.109 Gas tightness tests
7 Routine tests
   7.1 Power-frequency voltage tests on the main circuit
   7.2 Dielectric tests on auxiliary and control circuits
   7.3 Measurement of the resistance of the main circuit
   7.101 Partial discharge measurement
   7.102 Pressure tests of enclosures
   7.103 Gas tightness tests
   7.104 Mechanical operation tests
   7.105 Tests of auxiliary electrical, pneumatic and
         hydraulic devices
   7.106 Verification of the correct wiring
   7.107 Tests after erection on site
8 Guide to the selection of the switchgear for service
9 Information to be given with enquiries, tenders and orders
   9.101 Information with enquiries and orders
   9.102 Information with tenders
10 Rules for transport, storage, erection and maintenance
   10.1 Conditions during transport, storage and erection
   10.2 Erection
   10.3 Maintenance
Annexes
AA - Recommended method for the weatherproofing test for
     outdoor gas-insulated metal-enclosed switchgear
BB - Methods for testing gas-insulated metal-enclosed
     switchgear under conditions or arcing due to an
     internal fault
CC - Technical and practical considerations of site testing
DD - Gas tightness specifications and tests

Specifies requirements for gas-insulated metal-enclosed switchgear in which the insulation is obtained, at least partly, by an insulating gas other than air at atmospheric pressure, for alternating current of rated voltages of 72.5 kV and above, for indoor and outdoor installation, and for service frequencies up to and including 60 Hz. For the purpose of this standard the term 'switchgear' is used for 'gas-insulated metal-enclosed switchgear'.