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IEC/TS 62271-318 Ed. 1.0 en:2024 High-voltage switchgear and controlgear - Part 318: DC gas-insulated metal-enclosed switchgear for rated voltages including and above 100 kV, 2024
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Normal and special service conditions [Go to Page]
- 4.1 Normal service conditions
- 4.2 Special service conditions
- 4.101 General
- 5 Ratings [Go to Page]
- 5.1 General
- 5.2 Rated direct voltage (Urd)
- 5.3 Rated insulation level (Udd, Up, Us)
- 5.4 Rated continuous current (Ird)
- 5.5 Rated values of short-time withstand current [Go to Page]
- 5.5.1 Typical waveform of short-circuit current
- 5.5.2 Rated short-time withstand direct current (Ikd)
- 5.5.3 Rated peak withstand current (Ipd)
- 5.5.4 Rated duration of short-circuit (tkd)
- 5.6 Rated supply voltage of auxiliary and control circuits (Ua)
- 5.7 Rated supply frequency of auxiliary and control circuits
- 5.8 Rated pressure of compressed gas supply for controlled pressure systems
- 6 Design and construction [Go to Page]
- 6.1 Requirements for liquids in switchgear and controlgear
- 6.2 Requirements for gases in switchgear and controlgear
- 6.3 Earthing of switchgear and controlgear [Go to Page]
- 6.3.101 Earthing of the main circuit
- 6.3.102 Earthing of the enclosure
- 6.4 Auxiliary and control equipment and circuits
- 6.5 Dependent power operation
- 6.6 Stored energy operation
- 6.7 Independent unlatched operation (independent manual or power operation)
- 6.8 Manually operated actuators
- 6.9 Operation of releases
- 6.10 Pressure/level indication
- 6.11 Nameplates
- 6.12 Locking devices
- 6.13 Position indication
- 6.14 Degrees of protection provided by enclosures
- 6.15 Creepage distances for outdoor insulators
- 6.16 Gas and vacuum tightness [Go to Page]
- 6.16.1 General
- 6.16.2 Controlled pressure systems for gas
- 6.16.3 Closed pressure systems for gas
- 6.16.4 Sealed pressure systems
- 6.16.101 Leakage
- 6.16.102 Gas handling
- 6.17 Tightness for liquid systems
- 6.18 Fire hazard (flammability)
- 6.19 Electromagnetic compatibility (EMC)
- 6.20 X-Ray emission
- 6.21 Corrosion
- 6.22 Filling levels for insulation, switching and/or operation
- 6.101 General requirements for DC GIS
- 6.102 Pressure coordination
- 6.103 Internal arc fault [Go to Page]
- 6.103.1 General
- 6.103.2 External effects of the arc
- 6.103.3 Internal fault location
- 6.104 Enclosures [Go to Page]
- 6.104.1 General
- 6.104.2 Design of enclosures
- 6.105 Partitions [Go to Page]
- 6.105.1 Design of partitions
- 6.105.2 Partitioning
- 6.106 Pressure relief [Go to Page]
- 6.106.1 General
- 6.106.2 Non-reclosing pressure relief device
- 6.106.3 Pressure relief valve
- 6.106.4 Limitation of pressure rise in the case of an internal fault
- 6.107 Noise
- 6.108 Interfaces [Go to Page]
- 6.108.1 General
- 6.108.2 Cable connections
- 6.108.3 Direct transformer connections
- 6.108.4 Bushings
- 6.108.5 Interfaces for future extensions
- 6.109 Interlocking
- 7 Type tests [Go to Page]
- 7.1 General [Go to Page]
- 7.1.1 General remarks
- 7.1.2 Information for identification of test objects
- 7.1.3 Information to be included in type-test reports
- 7.2 Dielectric tests [Go to Page]
- 7.2.1 General
- 7.2.2 Ambient air conditions during tests
- 7.2.3 Wet test procedure
- 7.2.4 Arrangement of the equipment
- 7.2.5 Criteria to pass the test
- 7.2.6 Application of the test voltage and test conditions
- 7.2.7 Tests of switchgear and controlgear
- 7.2.8 Artificial pollution tests for outdoor insulators
- 7.2.9 Partial discharge tests
- 7.2.10 Dielectric tests on auxiliary and control circuits
- 7.2.11 Voltage test as condition check
- 7.2.101 DC insulation system test
- 7.2.102 Long-term energized test
- 7.3 Resistance measurement [Go to Page]
- 7.3.1 Measurement of the resistance of auxiliary contacts class 1 and class 2
- 7.3.2 Measurement of the resistance of auxiliary contacts class 3
- 7.3.3 Electrical continuity of earthed metallic parts test
- 7.3.4 Resistance measurement of contacts and connections in the main circuit as a condition check
- 7.4 Continuous current tests [Go to Page]
- 7.4.1 Conditions of the test object
- 7.4.2 Arrangement of the equipment
- 7.4.3 Test current and duration
- 7.4.4 Temperature measurement during test
- 7.4.5 Resistance of the main circuit
- 7.4.6 Criteria to pass test
- 7.5 Short-time withstand current and peak withstand current tests [Go to Page]
- 7.5.1 General
- 7.5.2 Arrangement of the equipment and of the test circuit
- 7.5.3 Test current and duration
- 7.5.4 Conditions of the test object after test
- 7.5.101 Tests on the main circuits
- 7.5.102 Tests on earthing circuits
- 7.6 Verification of the protection [Go to Page]
- 7.6.1 General
- 7.6.2 Verification of the IP coding
- 7.6.3 Verification of the IK coding
- 7.7 Tightness tests [Go to Page]
- 7.7.1 General
- 7.7.2 Controlled pressure systems for gas
- 7.7.3 Closed pressure systems for gas
- 7.7.4 Sealed pressure systems
- 7.7.5 Liquid tightness tests
- 7.8 Electromagnetic compatibility tests (EMC)
- 7.9 Additional tests on auxiliary and control circuits
- 7.10 X-radiation test for vacuum interrupters
- 7.101 Verification of making and breaking capacities
- 7.102 Mechanical and environmental tests [Go to Page]
- 7.102.1 General
- 7.102.2 Mechanical operation test at ambient temperature
- 7.102.3 Low- and high-temperature test
- 7.103 Proof tests for enclosures [Go to Page]
- 7.103.1 General
- 7.103.2 Burst test procedure
- 7.103.3 Strain measurement test
- 7.104 Pressure test on partitions
- 7.105 Test under conditions of arcing due to an internal fault
- 7.106 Insulator tests [Go to Page]
- 7.106.1 General
- 7.106.2 Thermal performance
- 7.106.3 Tightness test for partitions
- 7.107 Corrosion test on earthing connections [Go to Page]
- 7.107.1 General
- 7.107.2 Test procedure
- 7.107.3 Criteria to pass the test
- 7.108 Corrosion tests on sealing systems of enclosures and auxiliary equipment [Go to Page]
- 7.108.1 General
- 7.108.2 Test procedure
- 7.108.3 Criteria to pass the test
- 8 Routine tests [Go to Page]
- 8.1 General
- 8.2 Dielectric test on the main circuit [Go to Page]
- 8.2.101 Alternating or direct voltage tests on the main circuit
- 8.2.102 Partial discharge measurement
- 8.3 Tests on auxiliary and control circuits
- 8.4 Measurement of the resistance of the main circuit
- 8.5 Tightness test
- 8.6 Design and visual checks
- 8.101 Pressure tests of enclosures
- 8.102 Mechanical operation tests
- 8.103 Tests on auxiliary circuits, equipment and interlocks in the control mechanism
- 8.104 Pressure test on partitions
- 9 Guide to the selection of switchgear and controlgear (informative) [Go to Page]
- 9.1 General
- 9.2 Selection of rated values
- 9.3 Cable-interface considerations
- 9.4 Continuous or temporary overload due to changed service conditions
- 9.5 Environmental aspects
- 10 Information to be given with enquiries, tenders and orders (informative) [Go to Page]
- 10.1 General
- 10.2 Information with enquiries and orders
- 10.3 Information with tenders
- 11 Transport, storage, installation, operating instructions and maintenance [Go to Page]
- 11.1 General
- 11.2 Conditions during transport, storage and installation
- 11.3 Installation
- 11.4 Operating instructions
- 11.5 Maintenance
- 11.101 Tests after installation on-site [Go to Page]
- 11.101.1 General
- 11.101.2 Dielectric tests on the main circuits
- 11.101.3 Dielectric tests on auxiliary circuits
- 11.101.4 Measurement of the resistance of the main circuit
- 11.101.5 Gas tightness tests
- 11.101.6 Checks and verifications
- 11.101.7 Gas quality verifications
- 12 Safety
- 13 Influence of the product on the environment
- Annexes [Go to Page]
- Annex A (normative) Methods for alternating current testing of DC gas-insulated metal-enclosed switchgear under conditions of arcing due to an internal fault [Go to Page]
- A.1 General
- A.2 Short-circuit current arcing test [Go to Page]
- A.2.1 Test arrangements
- A.2.2 Current and voltage applied
- A.2.3 Test procedure
- A.2.4 Criteria to pass the test
- A.2.5 Test report
- A.2.6 Extension of the test results
- A.3 Composite verification by calculation and separate tests
- Annex B (informative) Technical and practical considerations of site testing [Go to Page]
- B.1 Test voltage generators
- B.2 Locating discharges
- B.3 Special test procedures [Go to Page]
- B.3.1 General
- B.3.2 Testing at reduced voltage
- B.3.3 Testing at reduced gas density
- B.4 Partial discharge measurements
- B.5 Electrical conditioning
- B.6 Repetition tests [Go to Page]
- B.6.1 General
- B.6.2 Recommended procedure
- B.7 Partial discharge detection method [Go to Page]
- B.7.1 General
- B.7.2 Conventional method according to IEC 60270
- B.7.3 VHF/UHF method
- B.7.4 Acoustic method
- B.7.5 Sensitivity verification of acoustic and UHF method
- Annex C (informative) Calculation of pressure rise due to an internal fault
- Annex D (informative) Information to be given with enquiries, tenders and orders [Go to Page]
- D.1 General
- D.2 Normal and special service conditions
- D.3 Ratings
- D.4 Design and construction
- D.5 Bus ducts
- D.6 Disconnector and earthing switch
- D.7 Bushing
- D.8 Cable connection
- D.9 Transformer connection
- D.10 Current transducer
- D.11 Voltage transducer
- D.12 Metal-oxide surge arrester
- D.13 Documentation for enquiries and tenders
- Annex E (informative) List of notes concerning certain countries
- Annex F (informative) Long-term energized test [Go to Page]
- F.1 Test objects
- F.3 Pre-test
- F.4 Condition check
- F.5 Success criteria, re-testing and interruptions
- F.2 Test sequence
- Annex G (informative) Application of DC GIS under composite voltage of alternating and direct voltage components [Go to Page]
- G.1 General
- G.2 Composite voltage consisting of alternating and direct voltage components
- G.3 Recommendation for application of DC GIS in bipolar DC schemes under composite voltage stress
- Annex H (informative) DC switchgear located on neutral buses
- Bibliography
- Figures [Go to Page]
- Figure 1 – Pressure coordination
- Figure 2 – Example of arrangement of enclosures and gas compartments
- Figure G.1 – Composite phase-to-earth voltage at midpoint of converter pole including third harmonic content and simplified voltage curve
- Tables [Go to Page]
- Table 1 – Reference table of service conditions relevant to DC GIS
- Table 2 – Performance criteria
- Table 3 – Type tests
- Table 4 – Test voltage for measuring PD intensity
- Table 5 – Sequence of DC insulation system test
- Table 6 – On-site test voltages
- Table D.1 – Normal and special service conditions
- Table D.2 – Ratings
- Table D.3 – Design and construction
- Table D.4 – Bus ducts
- Table D.5 – Bushing
- Table D.6 – Cable connection
- Table D.7 – Transformer connection
- Table D.8 – Current transducer
- Table D.9 – Voltage transducer
- Table D.10 – Documentation for enquiries and tenders
- Table F.1 – Test sequence for long-term energized test
- Table F.2 – Test sequence for long-term energized test with combined switching and lightning impulse voltage tests and changed sequence
- Table F.3 – Test procedure for the long-term energized test
- Table F.4 – Condition check for the long-term energized test [Go to Page]
