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eLibrary > PD IEC TS 62271-313:2025 High-voltage switchgear and controlgear - Direct current circuit-breakers >

PD IEC TS 62271-313:2025 High-voltage switchgear and controlgear - Direct current circuit-breakers, 2025

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PD IEC TS 62271-313:2025 High-voltage switchgear and controlgear - Direct current circuit-breakers, 2025

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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
Figures [Go to Page]
Figure 1 – Schematic of two-branch DC circuit-breaker
Figure 2 – Schematic of three-branch DC circuit-breaker
Figure 3 – Schematic of power electronic DC circuit-breaker
Figure 4 – Schematic of mechanical DC circuit-breaker
Figure 5 – Schematic of hybrid DC circuit-breaker
3.5 Parts of switchgear and controlgear
Figure 6 – Schematic of DC circuit-breaker electronic valve, section, and level
3.6 Operational characteristics of DC circuit-breaker
3.7 Characteristic quantities
Figure 7 – Schematic of a fault interruption process
3.8 Index of definitions
4 Normal and special service conditions
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)
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) [Go to Page]
5.6.1 General
5.6.2 Rated supply voltage (Ua)
5.7 Rated supply frequency of auxiliary and control circuits
5.101 Rated operating sequence
5.102 Rated short-circuit breaking current (Iscd)
5.103 Rated short-circuit making current
5.104 Rated dissipated energy during breaking operation
6 Design and construction [Go to Page]
6.1 Requirements for liquids in DC circuit-breaker
6.2 Requirements for gases in DC circuit-breaker
6.3 Earthing of DC circuit-breaker
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
Tables [Go to Page]
Table 1 – Nameplate information
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
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 Static mechanical load
6.102 Metal oxide surge arrester (MOSA)
6.103 Power to potential device (if applicable)
6.104 Liquid cooling system (if applicable)
6.105 Power electronic devices (if applicable)
6.106 Other components (if applicable)
7 Type tests [Go to Page]
7.1 General [Go to Page]
7.1.1 Basics
Table 2 – Type test items [Go to Page]
7.1.2 Information for identification of test objects
7.1.3 Information to be included in type-test reports
7.1.4 Invalid tests
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 tests
7.2.6 Application of the test voltage and test conditions
7.2.7 Tests of switchgear and controlgear
Table 3 – Invalid 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
7.3 Resistance measurement
7.4 Continuous current tests
7.5 Short-time withstand current and peak withstand current tests
7.6 Verification of the protection
7.7 Tightness tests
7.8 Electromagnetic compatibility (EMC) tests
7.9 Additional tests on auxiliary and control circuits
7.10 X-radiation test for vacuum interrupters
7.101 Mechanical and environmental test [Go to Page]
7.101.1 Miscellaneous provisions for mechanical and environmental tests
7.101.2 Mechanical operation test at ambient air temperature
Table 4 – Number of operating sequences [Go to Page]
7.101.3 Low and high-temperature test
7.102 Short-circuit making and breaking tests [Go to Page]
7.102.1 General
7.102.2 Making tests
7.102.3 Breaking tests
Table 5 – Making and breaking test duties [Go to Page]
7.102.4 Unit testing
7.102.5 Multi-part testing
Table 6 – Minimum number of DC-CB electronic valve levels per DC-C Belectronic valve to be operational type tested
7.103 Seismic qualification tests
7.104 Communication conformance tests
7.105 Cooling equipment tests
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
8.4 Measurement of the resistance of the main circuit
8.5 Tightness test
8.6 Design and visual checks
8.101 Connection inspection
8.102 Voltage-grading circuit inspection
8.103 Voltage withstand test
8.104 Mechanical operating tests
8.105 MOSA current distribution test
8.106 Verification of other components
9 Guide to the selection of DC circuit-breakers (informative) [Go to Page]
9.1 General
9.2 Selection of rated values [Go to Page]
9.2.101 Selection of the rated direct voltage
9.2.102 Insulation coordination
9.2.103 Selection of the rated continuous current
9.2.104 Local service conditions
9.2.105 Selection of the rated short-circuit breaking current
9.2.106 Operating sequence in service
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, operation 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 [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
12.101 High energy capacitor
12.102 High-voltage switchgear
12.103 High power laser
12.104 MOSA
12.105 Cooling system
12.106 Power electronic devices
13 Influence of the product on the environment
Annexes [Go to Page]
Annex A (informative) Calculation of the duration of the transient interruption voltage (TIV) and the dissipated energy in type tests [Go to Page]
A.1 General
A.2 Stresses during fault current suppression [Go to Page]
A.2.1 Test circuit with negligible resistance
Figure A.1 – Schematic diagram of current interruption process [Go to Page]
[Go to Page]
A.2.2 Test circuit with appreciable resistance
Figure A.2 – Schematic of DC circuit when the current has been commutated into the DC circuit-breaker's energy dissipation branch
Figure A.3 – Schematic diagram of current interruption process in a slightly resistive circuit [Go to Page]
A.3 Direct recovery voltage after current interruption
Table A.1 – Examples of DC circuit-breaker parameters and related interruption parameters
Annex B (informative) Test-circuits for testing the breaking capability of DC circuit-breakers
Figure B.1 – Schematic diagrams of test-circuits for DC circuit-breakers
Figure B.2 – Current for breaking test
Figure B.3 – Example of test oscillogram with test-circuit type C
Figure B.4 – Example of generator supplied test circuit (type C)
Figure B.5 – Simulation of a direct current interruption with test-circuit type B
Figure B.6 – Example of test oscillogram with test-circuit type B
Figure B.7 – Example of pre-charged capacitor supplied test-circuit (type B)
Annex C (informative) Layout examples of a test object for unit testing [Go to Page]
C.1 General
C.2 Example of a unit testing layout using one of the common units of a mechanical DC circuit-breaker with current injection composed of multiple vacuum interrupters in series in the case of a modular design
C.3 Example of a concept of unit testing layout using a partial unit for a mechanical DC circuit-breaker with current injection composed of multiple vacuum interrupters in series in the case of the combined design
Figure C.1 – Layout of unit for unit testing for a series-connected module design
Figure C.2 – Example of a unit for unit testing of the combined design to take out the necessary components
Table C.1 – Calculation example of a unit for unit testing
Annex D (normative) Tolerances on test quantities during type tests
Table D.1 – Tolerances on test quantities during type tests
Bibliography [Go to Page]

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