DL/T 403-2017 in English

DL/T 403-2017 High-voltage alternating-current vacuum circuit-breaker

1 General

1.1 Scope

Subclause 1.1 of DL/T 402-2016 is applicable with the following addition:

This standard specifies the general requirements for high-voltage AC vacuum circuit-breakers (hereinafter referred to as vacuum circuit-breakers) with a rated voltage of 3.6 kV and above and a rated frequency of 50 Hz, including service conditions, ratings, design and construction, type tests, routine tests, guidance to the selection, transport and storage, safety, and influence on the environment.

1.2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.

GB/T 2423.24-2013 Environmental testing - Part 2: Test methods - Test Sa: Simulated solar radiation at ground level and guidance for solar radiation testing
GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 20840.7 Instrument transformers - Part 7: Electronic voltage transformers
GB/T 20840.8 Instrument transformers - Part 8: Electronic current transformers
GB/T 30846-2014 High-voltage alternating current circuit-breakers with intentionally non-simultaneous pole operation
DL/T 402-2016 High-voltage alternating-current circuit-breakers
DL/T 593-2016 Common specifications for high-voltage switchgear and controlgear standards
DL/T 860 (All parts) Communication networks and systems in substations
IEC 61000-4-18:2011 Electromagnetic Compatibility (EMC) - Part 4-18: Testing and measurement - Damped oscillatory wave immunity test

2 Normal and special service conditions

Clause 2 of DL/T 593-2016 is applicable.

3 Terms and definitions

Clause 3 of DL/T 402-2016 is applicable with the following addition.

3.101
permitted storage period
minimum duration from the time when the vacuum circuit-breaker leaves the manufacturer to the time it is put into operation, during which its comprehensive technical indicators may not meet the specified values, yet it shall meet the technical indicators specified in DL/T 402-2016 and this standard as well as the enterprise standard (or technical specifications) for the product

Note: The permitted storage period of vacuum circuit-breakers is mainly controlled by corrosion and aging of vacuum interrupters, controllers, and structural components.

3.102
opening rebound
maximum distance the moving contact travels from the open position to the static contact during the opening operation

3.103
closing bounce time
duration from the initial contact between the contacts to the point when they establish a stable connection

3.104
overtravel
distance traveled by the moving contact component after generating the closing force upon contact

3.105
embedded pole
individual component made up by encapsulating a vacuum interrupter, or a vacuum interrupter, together with the conductive connections and/or terminals in solid insulating material

Foreword i
1 General
1.1 Scope
1.2 Normative references
2 Normal and special service conditions
3 Terms and definitions
4 Ratings
4.1 General
4.2 Rated voltage (Ur)
4.3 Rated insulation level
4.4 Rated frequency (fr)
4.5 Rated normal current (Ir) and temperature rise
4.6 Rated short-time withstand current (Ik)
4.7 Rated peak withstand current (Ip)
4.8 Rated duration of short circuit (tk)
4.9 Rated supply voltage of closing and opening devices and auxiliary and control circuits (Ua)
4.10 Rated supply frequency of closing and opening devices and auxiliary and control circuits
4.11 Rated pressures of compressed gas supply for insulation, operation and/or interruption
4.101 Rated short-circuit breaking current (Isc)
4.102 Transient recovery voltage related to the rated short-circuit breaking current
4.103 Rated short-circuit making current
4.104 Rated operating sequence
4.105 Characteristics for short-line faults
4.106 Rated out-of-phase making and breaking current
4.107 Rated capacitive switching currents
4.108 Inductive load switching currents
4.109 Rated time quantities
4.110 Number of mechanical operations
4.111 Classification of vacuum circuit-breakers as a function of electrical endurance
5 Design and construction
5.1 Requirements for liquids in circuit-breakers
5.2 Requirements for gases in circuit-breakers
5.3 Earthing of circuit-breakers
5.4 Auxiliary and control equipment
5.5 Power operation
5.6 Stored energy operation
5.7 Independent manual operation
5.8 Operation of releases
5.9 Low- and high-pressure interlocking devices
5.10 Nameplates
5.11 Interlocking devices
5.12 Position indication
5.13 Degrees of protection by enclosures
5.14 Creepage distances
5.15 Gas and vacuum tightness
5.16 Liquid tightness
5.17 Flammability
5.18 Electromagnetic compatibility (EMC)
5.19 X-ray emission
5.20 Corrosion
5.101 Requirements for simultaneity of poles during single closing and single opening operations
5.102 General requirement for operation
5.103 Pressure limits of fluids for operation
5.104 Vent outlets
5.105 Vacuum interrupter
5.106 Embedded poles (where applicable)
5.107 Permanent magnetic actuator (where applicable)
5.108 Intelligent high-voltage vacuum circuit-breaker (where applicable)
5.109 Other requirements
6 Type tests
6.1 General provisions
6.2 Dielectric tests
6.3 Radio interference voltage (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 (EMC) tests
6.10 Additional tests on auxiliary and control circuits
6.11 X-radiation test procedure for vacuum interrupters
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 vacuum circuit-breakers class E2
7 Routine tests
7.1 General
7.2 Dielectric test on the main circuit
7.3 Tests on auxiliary and control circuits
7.4 Measurement of the resistance of the main circuit
7.5 Tightness tests
7.6 Design and visual checks
7.7 Mechanical operating and mechanical characteristic tests
7.8 Gas humidity measurement
8 Guidance to the selection of vacuum circuit-breakers for service
9 Information to be given with enquiries, tenders and orders
10 Rules for transport, storage, installation, operation and maintenance
11 Safety
12 Influence of the product on the environment
Annex A (Normative) Supplementary technical requirements for intelligent high-voltage vacuum circuit-breakers
Annex B (Normative) Technical requirements for vacuum interrupter
Annex C (Normative) Technical requirements for embedded poles