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PD CLC IEC/TS 62271-5:2025 High-voltage switchgear and controlgear - Part 5: Common specifications for direct current switchgear and controlgear, 2025
- undefined [Go to Page]
- European foreword
- Endorsement notice
- Annex ZA (normative) Normative references to international publications with their corresponding European publications
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 General terms and definitions
- 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 Operational characteristics of switchgear and controlgear [Go to Page]
- 3.6.5 Terms and definitions relative to pressure (or density)
- 3.6.6 Terms and definitions relating to gas and vacuum tightness
- 3.6.7 Terms and definitions relating to liquid tightness
- 3.7 Characteristic quantities
- 3.8 Index of definitions
- 4 Normal and special service conditions [Go to Page]
- 4.1 Normal service conditions [Go to Page]
- 4.1.1 General
- 4.1.2 Indoor switchgear and controlgear
- 4.1.3 Outdoor switchgear and controlgear
- 4.2 Special service conditions [Go to Page]
- 4.2.1 General
- 4.2.2 Altitude
- 4.2.3 Exposure to pollution
- 4.2.4 Temperature and humidity
- 4.2.5 Exposure to abnormal vibrations, shock or tilting
- 4.2.6 Wind speed
- 4.2.7 Other parameters
- 5 Ratings [Go to Page]
- 5.1 General
- 5.2 Rated direct voltage (Urd) [Go to Page]
- 5.2.1 General
- 5.2.2 Rated voltages
- 5.3 Rated insulation level (Udd, Up, Us)
- Tables [Go to Page]
- Table 1 – Preferred rated insulation levels
- 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
- Figures [Go to Page]
- Figure 1 – Schematic representation of superimposed impulse voltage tests
- Figure 2 – Typical waveform of a short-circuit current in an HVDC system [Go to Page]
- 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) [Go to Page]
- 5.6.1 General
- 5.6.2 Rated supply voltage (Ua)
- 5.7 Rated supply frequency of auxiliary and control circuits
- Table 2 – Direct voltage of auxiliary and control circuits
- Table 3 – Alternating voltage of auxiliary and control circuits
- 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
- 6.4 Auxiliary and control equipment and circuits [Go to Page]
- 6.4.1 General
- 6.4.2 Protection against electric shock
- 6.4.3 Components installed in enclosures
- Figure 3 – Examples of classes of contacts
- Table 4 – Auxiliary contact classes
- 6.5 Dependent power operation
- 6.6 Stored energy operation [Go to Page]
- 6.6.1 General
- 6.6.2 Energy storage in gas receivers or hydraulic accumulators
- 6.6.3 Energy storage in springs (or weights)
- 6.6.4 Manual charging
- 6.6.5 Motor charging
- 6.6.6 Energy storage in capacitors
- 6.7 Independent unlatched operation (independent manual or power operation)
- 6.8 Manually operated actuators
- 6.9 Operation of releases [Go to Page]
- 6.9.1 General
- 6.9.2 Shunt closing release
- 6.9.3 Shunt opening release
- 6.9.4 Capacitor operation of shunt releases
- 6.9.5 Under-voltage release
- 6.10 Pressure/level indication [Go to Page]
- 6.10.1 Gas pressure
- 6.10.2 Liquid level
- 6.11 Nameplates [Go to Page]
- 6.11.1 General
- 6.11.2 Application
- 6.12 Locking devices
- Table 5 – Nameplate information
- 6.13 Position indication
- 6.14 Degrees of protection provided by enclosures [Go to Page]
- 6.14.1 General
- 6.14.2 Protection of persons against access to hazardous parts and protection of the equipment against ingress of solid foreign objects (IP coding)
- 6.14.3 Protection against ingress of water (IP coding)
- 6.14.4 Protection against mechanical impact under normal service conditions (IK coding)
- 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
- 6.17 Tightness for liquid systems [Go to Page]
- 6.17.1 General
- 6.17.2 Leakage rates
- 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
- 7 Type tests [Go to Page]
- 7.1 General [Go to Page]
- 7.1.1 Basics
- 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
- Figure 4 – Diagram of connections of a switching device
- Table 6 – Test conditions in general case
- Table 7 – Test conditions in case of impulse voltage tests across the isolating distance (or open switching device) [Go to Page]
- 7.2.7 Tests of switchgear and controlgear
- Table 8 – Test conditions in case of superimposed impulse voltage tests [Go to Page]
- 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
- Figure 5 – Test sequence for polarity reversal tests
- Table 9 – Test conditions for polarity reversal tests
- 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 Condition 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
- Table 10 – Limits of temperature and temperature rise for various parts, materials and dielectrics of high-voltage switchgear and controlgear
- 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
- 7.6 Verification of the protection [Go to Page]
- 7.6.1 Verification of the IP coding
- 7.6.2 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
- Table 11 – Permissible leakage rates for gas systems [Go to Page]
- 7.7.4 Sealed pressure systems
- 7.7.5 Liquid tightness tests
- 7.8 Electromagnetic compatibility tests (EMC) [Go to Page]
- 7.8.1 Emission tests
- Figure 6 – Diagram of a test circuit for the radio interference voltage test [Go to Page]
- 7.8.2 Immunity tests on auxiliary and control circuits
- Table 12 – Application of voltages at the fast transient/burst test
- Table 13 – Application of voltage at the damped oscillatory wave test [Go to Page]
- 7.8.3 Additional EMC tests on auxiliary and control circuits
- Table 14 – Assessment criteria for transient disturbance immunity
- 7.9 Additional tests on auxiliary and control circuits [Go to Page]
- 7.9.1 General
- 7.9.2 Functional tests
- 7.9.3 Verification of the operational characteristics of auxiliary contacts
- 7.9.4 Environmental tests
- 7.9.5 Dielectric test
- 7.10 X-radiation test for vacuum interrupters [Go to Page]
- 7.10.1 General requirements
- 7.10.2 Test voltage and measurement procedure
- 7.10.3 Acceptance criteria
- Figure 7 – Test location of radiation survey instrument
- 8 Routine tests [Go to Page]
- 8.1 General
- 8.2 Dielectric test on the main circuit
- 8.3 Tests on auxiliary and control circuits [Go to Page]
- 8.3.1 Inspection of auxiliary and control circuits, and verification of conformity to the circuit diagrams and wiring diagrams
- 8.3.2 Functional tests
- 8.3.3 Verification of protection against electrical shock
- 8.3.4 Dielectric tests
- 8.4 Measurement of the resistance of the main circuit
- 8.5 Tightness test [Go to Page]
- 8.5.1 General
- 8.5.2 Controlled pressure systems for gas
- 8.5.3 Closed pressure systems for gas
- 8.5.4 Sealed pressure systems
- 8.5.5 Liquid tightness tests
- 8.6 Design and visual checks
- 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 [Go to Page]
- 9.5.1 Service conditions
- 9.5.2 Clearances affected by service conditions
- 9.5.3 High humidity
- 9.5.4 Solar radiation
- 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 [Go to Page]
- 11.3.1 General
- 11.3.2 Unpacking and lifting
- 11.3.3 Assembly
- 11.3.4 Mounting
- 11.3.5 Connections
- 11.3.6 Information about gas and gas mixtures for controlled and closed pressure systems
- 11.3.7 Final installation inspection
- 11.3.8 Basic input data by the user
- 11.3.9 Basic input data by the manufacturer
- 11.4 Operating instructions
- 11.5 Maintenance [Go to Page]
- 11.5.1 General
- 11.5.2 Information about fluids and gas to be included in maintenance manual
- 11.5.3 Recommendations for the manufacturer
- 11.5.4 Recommendations for the user
- 11.5.5 Failure report
- 12 Safety [Go to Page]
- 12.1 General
- 12.2 Precautions by manufacturers
- 12.3 Precautions by users
- 13 Influence of the product on the environment
- Annexes [Go to Page]
- Annex A (informative) Examples of HVDC side switchgear arrangement for one pole in an HVDC substation
- Figure A.1 – Example of HVDC side switchgear arrangement for one pole in an HVDC substation
- Annex B (informative) Exposure to pollution [Go to Page]
- B.1 General
- B.2 Minimum requirements for switchgear in normal service condition
- B.3 Minimum requirements for switchgear in special service condition
- Annex C (informative) Preferred insulation levels for rated voltages lower than 105 kV
- Table C.1 – Preferred insulation levels for rated voltages lower than 105 kV
- Annex D (informative) Short-circuit current in HVDC systems [Go to Page]
- D.1 VSC HVDC
- Figure D.1 – VSC HVDC under worst-case, pole-pole DC fault [Go to Page]
- D.2 LCC HVDC
- D.3 Special case of LCC HVDC DC faults – LCC as diode bridge
- Figure D.2 – LCC HVDC under worst-case, pole-pole DC fault
- Figure D.3 – Special case LCC HVDC under worst-case, pole-pole DC fault [Go to Page]
- D.4 HVDC systems with DC circuit-breakers
- Figure D.4 – HVDC system with DC circuit-breaker under worst-case, pole-pole DC fault
- Figure D.5 – DC circuit-breaker simple model [Go to Page]
- D.5 Calculation of the rated short-time withstand direct current
- Figure D.6 – Equivalent fault current for calculation of rated short time withstand direct current [Go to Page]
- D.6 Calculation of Joule integral value (Ej)
- Annex E (informative) References for auxiliary and control circuit components
- Table E.1 – List of reference documents for auxiliary and control circuit components
- Annex F (informative) List of symbols
- Annex G (normative) Method for the weatherproofing test for outdoor switchgear and controlgear
- Figure G.1 – Arrangement for weatherproofing test
- Figure G.2 – Nozzle for weatherproofing test
- Annex H (normative) Tolerances on test quantities during tests
- Table H.1 – Tolerances on test quantities for type test
- Annex I (informative) Extension of validity of type tests [Go to Page]
- I.1 General
- I.2 Dielectric tests
- I.3 Short-time withstand current and peak withstand current tests
- I.4 Electromagnetic immunity test on auxiliary and control circuits
- I.5 Environmental tests on auxiliary and control circuits
- Annex J (normative) Identification of test objects [Go to Page]
- J.1 General
- J.2 Data
- J.3 Drawings
- Table J.1 Drawing list and contents
- Annex K (informative) Test circuit for superimposed impulse voltage tests [Go to Page]
- K.1 General
- K.2 Test circuit using blocking capacitor
- K.3 Test circuit using sphere gap
- Figure K.1 – Test circuit for superimposed impulse tests using blocking capacitor
- Figure K.2 – Test circuit for superimposed impulse tests using sphere gap
- Annex L (informative) Information and technical requirements to be given with enquiries, tenders and orders [Go to Page]
- L.1 General
- L.2 Normal and special service conditions (refer to Clause 4)
- L.3 Ratings (refer to Clause 5)
- L.4 Design and construction (refer to Clause 6)
- L.5 System information
- L.6 Documentation for enquiries and tenders
- Annex M (informative) Electromagnetic compatibility on site
- Annex N (informative) Standardization activities of HVDC
- Bibliography [Go to Page]
