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GB/T 1984-2024: High-voltage alternating-current circuit-breakers
Status: Valid GB/T 1984: Evolution and historical versions
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High-voltage alternating-current circuit-breakers
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GB/T 1984-2024
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[GB/T 1984-2014] High-voltage alternating-current circuit-breakers
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High-voltage alternating-current circuit-breakers
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Alternating current high-voltage circuit-breakers
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PDF similar to GB/T 1984-2024
Standard similar to GB/T 1984-2024 GB/T 11022 GB/T 3906 GB/T 30092 GB/T 1985 Basic data | Standard ID | GB/T 1984-2024 (GB/T1984-2024) | | Description (Translated English) | High-voltage alternating-current circuit-breakers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K43 | | Classification of International Standard | 29.130.10 | | Word Count Estimation | 230,247 | | Date of Issue | 2024-09-29 | | Date of Implementation | 2025-04-01 | | Older Standard (superseded by this standard) | GB/T 1984-2014 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 1984-2024: High-voltage alternating-current circuit-breakers---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 29.130.10
CCSK43
National Standard of the People's Republic of China
Replace GB/T 1984-2014
High voltage AC circuit breaker
Released on 2024-09-29
2025-04-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface Ⅺ
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
3.1 General Terms and Definitions 2
3.2 Final Assembly 5
3.3 Assembly components 5
3.4 Switchgear 6
3.5 Components of a circuit breaker 7
3.6 Operational characteristics 10
3.7 Characteristic parameters 12
3.8 Fault Type 23
4 Normal and special conditions of use24
5 Rating 24
5.1 Overview 24
5.2 Rated voltage (Ur) 24
5.3 Rated insulation level (Ud, Up and Us) 24
5.4 Rated frequency (fr) 24
5.5 Rated continuous current (Ir) 25
5.6 Rated short-time withstand current (Ik) 25
5.7 Rated peak withstand current (Ip) 25
5.8 Rated short circuit duration (tk) 25
5.9 Rated supply voltage of auxiliary and control circuits (Ua) 25
5.10 Rated frequency of auxiliary and control circuit supply voltage 25
5.11 Rated pressure of compressed gas source for controlled pressure system 25
5.12 Rated filling pressure/level for insulation and/or switching 25
5.101 Rated short-circuit breaking current (Isc) 25
5.102 Rated first open pole coefficient (kpp) 27
5.103 Rated short-circuit making current 27
5.104 Rated operating sequence 27
5.105 Rated out-of-step closing and breaking current 28
5.106 Rated capacitive current 28
6 Design and structure 30
6.1 Requirements for liquid in circuit breakers 30
6.2 Requirements for gas in circuit breakers 30
6.3 Grounding of circuit breakers 30
6.4 Auxiliary and control equipment and circuits 30
6.5 Power Operation 31
6.6 Energy storage operation 31
6.7 Operation independent of non-locking (operation independent of manpower or power) 31
6.8 Human-operated actuators 31
6.9 Operation of the trip unit 31
6.10 Pressure/Liquid Level Indicator 32
6.11 Nameplate 32
6.12 Interlocking device 33
6.13 Position indication 33
6.14 Degree of protection of enclosure 34
6.15 Creepage distance of outdoor insulators 34
6.16 Gas and vacuum sealing 34
6.17 Liquid sealing 34
6.18 Fire (flammability) 34
6.19 Electromagnetic Compatibility (EMC) 34
6.20 X-ray emission 34
6.21 Corrosion 34
6.22 Insulation and/or switching, operating filling pressure/level 34
6.101 Requirements for inter-pole synchronization during single-close and single-break operations 34
6.102 General requirements for operation 35
6.103 Pressure limits of operating fluids 35
6.104 Exhaust hole 35
6.105 Time parameter 35
6.106 Mechanical load 36
6.107 Classification of circuit breakers 36
7 Type test 38
7.1 General Principles38
7.2 Insulation test 40
7.3 Radio Interference Voltage Test (RIV) 44
7.4 Measurement of loop resistance 44
7.5 Continuous current test 45
7.6 Short-time withstand current and peak withstand current test 45
7.7 Protection level verification 46
7.8 Sealing test 46
7.9 Electromagnetic compatibility test (EMC) 46
7.10 Additional tests on auxiliary and control circuits 46
7.11 X-ray test of vacuum interrupter 47
7.101 Mechanical and environmental tests 47
7.102 Provisions for closing and opening tests 56
7.103 General principles for making and breaking tests 71
7.104 Explanation of arcing time 76
7.105 Short-circuit test parameters 93
7.106 Short circuit test procedure 106
7.107 Terminal fault test 107
7.108 Additional short-circuit test 110
7.109 Near-field fault test 113
7.110 Out-of-step closing and opening tests 122
7.111 Capacitive current test 123
7.112 Requirements for closing and opening tests of E2 class circuit breakers with rated voltage up to and including 40.5 kV 136
7.113 Noise level test 137
8 Factory Test 137
8.1 General Principles137
8.2 Insulation test of main circuit 137
8.3 Testing of auxiliary and control circuits 138
8.4 Measurement of main circuit resistance 138
8.5 Sealing test 138
8.6 Design inspection and appearance inspection 138
8.101 Mechanical operation test 138
9 Guidelines for selection of circuit breakers 139
9.101 General 140
9.102 Selection of rated values under operating conditions 141
9.103 Selection of ratings under fault conditions 142
9.104 Selection of electrical life 145
9.105 Selection of capacitive load switching 145
10 Documents to be provided with enquiries, tenders and orders 145
10.1 General 145
10.2 Information provided with enquiries and orders 145
10.3 Information provided with the tender documents 146
11 Rules for transportation, storage, installation, operation and maintenance 148
11.1 General 148
11.2 Conditions during transportation, storage and installation 148
11.3 Installation 149
11.4 Operation 153
11.5 Maintenance 153
11.101 Resistors and Capacitors 154
12 Safety 154
13 Impact of products on the environment154
Appendix A (Normative) Tolerances of test parameters during the test 155
Appendix B (Normative) Type test records and reports 163
B.1 Data and results to be recorded 163
B.2 Contents of type test report 163
Appendix C (Normative) Use of mechanical properties and related requirements 166
Appendix D (Normative) Requirements for closing and opening test procedures for metal-enclosed circuit breakers and dead-shell circuit breakers 167
D.1 General 167
D.2 Reduced number of closing and breaking units for testing 167
D.3 Test of single pole in one enclosure 167
D.4 Test of three poles in one enclosure 170
Appendix E (Normative) Requirements for circuit breakers with disconnecting resistors 172
E.1 General 172
E.2 Opening and closing performance verification 172
E.3 Resistor connection time 182
E.4 Current carrying performance 182
E.5 Insulation performance 182
E.6 Mechanical properties 182
E.7 Requirements for the technical specifications of disconnecting resistors 183
E.8 Example of recovery voltage waveform 183
Appendix F (Normative) Method for determining expected TRV 187
F.1 General 187
F.2 Drawing the envelope 187
F.3 Determination of parameters 188
Appendix G (Normative) Methods for determining expected TRV waveforms 191
G.1 General 191
G.2 Brief description of recommended methods 192
G.3 Details of the recommended approach 192
G.4 Comparison of various methods.201
Appendix H (Informative) Requirements for circuit breakers to interrupt transformer limited faults 203
H.1 Overview 203
H.2 Circuit breakers with rated voltage less than 126 kV 204
H.3 Circuit breakers with rated voltage greater than or equal to 126 kV and less than or equal to 800 kV 205
H.4 Circuit breakers with rated voltage greater than 800 kV 205
Appendix I (Normative) Calculation of transient recovery voltage for near-field faults based on rated characteristics 207
I.1 Basic Methods 207
I.2 Line-side transient voltage 209
I.3 Transient voltage on power supply side 209
I.4 Calculation Example 212
Appendix J (Normative) Verification of capacitive current interruption in the presence of a single-phase or two-phase ground fault 215
J.1 General Principles 215
J.2 Test voltage 215
J.3 Test current 215
J.4 Test method 215
J.5 Criteria for passing the test 215
References 217
Figure 1 Typical waveform of a three-phase short-circuit closing-breaking cycle 13
Figure 2 Opening and closing operation of a circuit breaker without opening and closing resistors 14
Figure 3 Closing-opening cycle of a circuit breaker without closing and opening resistors 15
Figure 4 Reclosing of a circuit breaker without a closing and opening resistor (automatic reclosing) 15
Figure 5 Opening and closing operation of circuit breaker with opening and closing resistors 16
Figure 6 Closing-opening cycle of a circuit breaker with opening and closing resistors 17
Figure 7 Reclosing of circuit breaker with opening and closing resistor (automatic reclosing) 18
Figure 8 Determination of short-circuit closing and breaking current and DC component percentage 26
Figure 9 Relationship between the percentage of the DC component and the time interval from the start of the short circuit for different DC time constants 27
Figure 10 Wind speed measurement example 52
Figure 11 Low temperature test sequence 53
Figure 12 High temperature test sequence 55
Figure 13 Humidity test 56
Figure 14 Example of reference mechanical stroke characteristic curve (ideal curve) 59
Figure 15 The reference mechanical stroke characteristic curve in Figure 14 and its envelope centered on the reference curve (5%, -5%) 60
Figure 16 The reference mechanical stroke characteristic curve in Figure 14 and its envelope (10%, 0%) completely shifted upward based on the reference curve 60
Figure 17 The reference mechanical stroke characteristic curve in Figure 14 and its envelope (0%, -10%) completely shifted downward based on the reference curve 61
Figure 18 Equivalent test device for unit testing of circuit breakers having more than one independent making and breaking unit 62
Figure 19 Grounding of the test circuit for single-phase short-circuit test with kpp=1.5 63
Figure 20 Grounding of the test circuit for kpp=1.3, single-phase short-circuit test 64
Figure 21 Test circuit 64 for single-phase out-of-step test
Figure 22 Test circuit for out-of-step test using two voltages with a phase difference of 120°65
Figure 23 Test circuit for out-of-step test when one end of the circuit breaker is grounded (with the consent of the manufacturer)
Figure 24 Example of expected TRV in a test represented by a four-parameter envelope that meets type test conditions.
66 TRV Regulations
Figure 25 Example of expected TRV in a test represented by a two-parameter envelope that meets type test conditions.
66 TRV Regulations
Figure 26 Example of expected TRV waveforms and their combined envelopes for two tests67
Figure 27 Grounding of the test circuit for a three-phase short-circuit test with kpp=1.5 72
Figure 28 Grounding of the test circuit for a three-phase short-circuit test with kpp=1.3 73
Figure 29 Determination of power frequency recovery voltage 75
Figure 30 Legend of time parameters in the description of arcing time for test method T100a three-phase test 77
Figure 31 Example of three effective symmetrical breaking operations during three-phase test with kpp=1.579
Figure 32 Example of three effective symmetrical breaking operations during three-phase test with kpp=1.380
Figure 33 Example of three effective asymmetrical breaking operations during three-phase test with kpp=1.583
Figure 34 Example of three effective asymmetrical breaking operations during three-phase test with kpp=1.384
Figure 35 Example of three effective symmetrical breaking operations when kpp=1.5, single-phase test instead of three-phase condition 87
Figure 36 Example of three effective symmetrical breaking operations when kpp=1.3, single-phase test instead of three-phase condition 88
Figure 37 Example of three effective asymmetrical breaking operations when kpp=1.5, single-phase test instead of three-phase condition 90
Figure 38 Example of three effective asymmetrical breaking operations when kpp=1.3, single-phase test instead of three-phase condition 91
Figure 39 Graphical representation of the arcing window and the voltage coefficient kp that determines the TRV of each pole for a system with a kpp of 1.392
Figure 40 Graphical representation of the arcing window and the voltage coefficient kp that determines the TRV of each pole for a system with a kpp of 1.5 93
Figure 41 Representation of the specified TRV using four-parameter reference lines and delay lines 95
Figure 42 Representation of the specified TRV using two parameter reference lines and delay lines 96
Figure 43 Basic circuit for terminal fault with ITRV 96
Figure 44 Relationship between ITRV and TRV 97
Figure 45 Example of a nonlinear rise rate of transient voltage on a line with a time delay 104
Figure 46 Necessity and test requirements for additional single-phase tests 112
Figure 47 Basic circuit arrangement for the near-field fault test in accordance with 7.109.3 and type a) prospective TRV circuit. both on the power supply side and on the line side
Delay 114
Figure 48 Basic circuit arrangement for the near-field fault test in accordance with 7.109.3 and b1) type prospective TRV circuit. There is an ITRV and a line
There is a delay of 115 on the roadside
Figure 49 Basic circuit arrangement for close-range fault test in accordance with 7.109.3 and b2) type prospective TRV circuit. time delay and line on the power supply side
Roadside No Delay 116
Figure 50 Example of line-side transient recovery voltage with time delay 117
Figure 51 Flowchart for selecting the near-zone fault test circuit 119
Figure 52 Compensating for the long delay on the power supply side by increasing the amplitude of the line side voltage 120
Figure 53 Recovery voltage of capacitive current breaking test 133
Figure 54 Reclassification procedure for line and cable charging current tests 135
Figure 55 Reclassification procedure for capacitor bank current switching test 135
Figure D.1 Test arrangements considered in Tables D.1, D.2 and D.3 169
Figure E.1 Typical system structure for circuit breaker with disconnecting resistor 172
Figure E.2 Test circuit for test methods T60 and T100 173
Figure E.3 Test circuit for test methods T10, T30 and OP2 174
Figure E.4 Ur = 1100 kV, Isc = 50 kA, fr = 50 Hz, test mode 100 s (b), example of underdamped TRV 176
Figure E.5 Ur = 1100 kV, Isc = 50 kA, fr = 50 Hz, test method T10, example of overdamped TRV 177
Figure E.6 Example of test circuit for near-field fault test mode L90 178
Figure E.7 Example of real line simulation based on Ur = 1100 kV, Isc = 50 kA, fr = 50 Hz, near-field fault test mode L90 179
Figure E.8 Typical recovery voltage waveform of capacitive current interruption of circuit breaker with trip resistor 180
Figure E.9 T10 on resistor switch of circuit breaker with opening resistor (based on Ur = 1100 kV, Isc = 50 kA, fr =
Typical recovery voltage waveform at 50Hz)181
Figure E.10 TRV waveform for large short-circuit current breaking operation 183
Figure E.11 Current under large short-circuit current breaking operation 184
Figure E.12 TRV waveform for small short-circuit current breaking operation 184
Figure E.13 Current 185 under small short-circuit current breaking operation
Figure E.14 Voltage waveform of line charging current interruption operation 185
Figure E.15 Current waveform of line charging current interruption operation 186
Figure F.1 Expected TRV of a circuit expressed using four parameters --- F.2c) 1) Case 188
Figure F.2 Expected TRV of a circuit expressed using four parameters --- F.2c)2) 189
Figure F.3 Expected TRV of a circuit expressed using four parameters --- Case F.2c)3)i) 189
Figure F.4 Using two parameters to express the expected TRV of a loop - case F.2c)3)ii) 190
Figure G.1 Effect of suppression on TRV peak 191
Figure G.2 Interruption in the presence of arc voltage 193
Figure G.3 TRV for ideal breaking 193
Figure G.4 Breaking when current zero point is significantly advanced 193
Figure G.5 Relationship between the current values occurring in the test and the expected current values of the system and TRV 194
Figure G.6 Interruption with post-arc current 195
Figure G.7 Schematic diagram of power frequency current injection device 196
Figure G.8 Operation sequence of power frequency current injection device 197
Figure G.9 Schematic diagram of capacitor injection device 198
Figure G.10 Operation sequence of capacitor injection device.199
Figure H.1 First example of a transformer-limited fault (also called a transformer-fed fault) 203
Figure H.2 Second example of a transformer limited fault (also called a transformer secondary fault) 204
Figure I.1 Typical illustration of TRV parameters on the line side and the source side - both the line side and the source side have time delay 208
Figure I.2 Actual TRV curves for nearby faults L90, L75 and L60 on the power supply side 210
Figure I.3 Typical illustration of TRV parameters on the line side and the source side - both the line side and the source side have time delays, and the source side has ITRV 211
Table 1 Preferred values of rated capacitive current 29
Table 2 Nameplate information 32
Table 3 Examples of static horizontal and vertical forces for static terminal loading36
Table 4 Mechanical operation times 37
Table 5 Type test 38
Table 6 Ineffective test 40
Table 7 Partial discharge test voltage for GIS circuit breakers with rated voltage of 72.5 kV and above and circuit breakers with unpowered enclosure 42
Table 8 Test requirements for voltage tests as condition checks on metal enclosed circuit breakers 43
Table 9 Number of operation sequences 50
Table 10 Standard values of ITRV --- rated voltage 126 kV and above 76
Table 11 Parameters of the last current half-wave in three-phase test and single-phase test in place of three-phase condition related to short-circuit test mode T100a
(operating frequency is 50Hz) 81
Table 12 Expected TRV parameters for single-phase test instead of three-phase test (verification of the interruption of the second interrupting pole with kpp=1.3) 85
Table 13 Expected TRV parameters for single-phase test instead of three-phase test (verification of the interruption of the third interrupting pole with kpp=1.3) 85
Table 14 Standard multipliers for the TRV values of the second and third disconnected poles 92
Table 15 Arcing window during symmetrical current test 92
Table 16 Expected TRV values for kpp=1.5, S1 class circuit breaker 98
Table 17 Expected TRV values for kpp=1.5, S2 class circuit breaker 99
Table 18 Expected TRV values for circuit breakers with kpp=1.3 and rated voltage 126 kV and above 101
Table 19 Expected TRV value of circuit breaker with kpp=1.5 and rated voltage 126kV 102
Table 20 Expected TRV value for out-of-step test of S1 class circuit breaker with kpp=2.5 105
Table 21 Expected TRV value for out-of-step test of S2 class circuit breaker with kpp=2.5 105
Table 22 Expected TRV value for out-of-step test of circuit breaker with kpp=2.5 and rated voltage 126kV 105
Table 23 Expected TRV values for out-of-step test of circuit breakers with kpp=2.0 and rated voltage 126 kV and above 106
Table 24 Expected TRV parameters for single-phase ground fault and out-of-phase ground fault tests 112
Table 25 Standard values of near-field fault line characteristics 114
Table 26 Standard value of expected TRV of the nearby fault power supply side circuit 121
Table 27 Test method for verifying out-of-step rating 123
Table 28 Specified values of u1, t1, uc and t2 125
Table 29 Common requirements for test methods 127
Table 30 Operation sequence for the electrical life test of E2 class circuit breaker for automatic reclosing mode 136
Table 31 Application of main circuit insulation test voltage 137
Table 32 Circuit breaker characteristics that should be provided 145
Table 33 Ratings and Characteristics 147
Table A.1 Tolerances of test parameters during type testing 156
Table D.1 Three-phase compatibility current interruption under operating conditions. power supply side voltage, load side voltage and recovery voltage 168
Table D.2 For laboratory single-phase test, according to the capacitive current interruption test of 7.111.7, the voltage values on the power supply side and the load side and the recovery
Voltage 169
Table D.3 Capacitive current breaking under actual operating conditions. Maximum standard voltage value 171
Table E.1 Calculation results of TRV for terminal fault and out-of-step 175
Table E.2 Results of TRV calculation for test method L90 179
Table E.3 Results of TRV calculation for test method T10 181
Table G.1 Various methods for determining expected TRV.201
Table H.1 Expected TRV standard values, rated voltage in non-effectively grounded neutral point system greater than or equal to 3.6 kV and less than 126 kV, and
Test method T30 205 for circuit breakers connected to transformers with small capacitance
Table H.2 Expected TRV standard values, circuit breakers with rated voltages above 800 kV connected to transformers with small capacitors 206
Table I.1 Ratio of voltage drop to TRV on the power supply side 209
Table I.2 Time delay on both the power supply side and the line side (L90, L75 at 252kV, 50kA, 50Hz) 212
Table I.3 There is ITRV on the power supply side and time delay on the line side (L90 at 252 kV, 50 kA, 50 Hz) 213
Table I.4 There is a delay on the power supply side and no delay on the line side (L90 at 252 kV, 50 kA, 50 Hz) --- Calculation of simplified method 214
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 1984-2014 "High Voltage AC Circuit Breakers". Compared with GB/T 1984-2014, except for structural adjustments and editing
In addition to the changes in performance, the main technical changes are as follows.
--- Deleted the standard direction of circuit breakers with predetermined inter-pole asynchronism and circuit breakers used as bypass switches; deleted the standard direction of single-pole circuit breakers
requirements that circuit breakers and bipolar circuit breakers should comply with; added "The closing and opening test methods described in this document only include direct test methods
The explanation of the "Method" was added; the standard direction of circuit breakers for the power supply and distribution system of electrified railways was added (see Chapter 1, see the.2014 edition
Chapter 1);
--- Added "cut-off, insulated cable, phase-separated shielded cable, DC time constant of short-circuit breaking current, lifetime sealed circuit breaker, electric
Resistor switch, vacuum interrupter, opening and closing, connection time (of the trip resistor), start time of (trip or close) operation, total arcing
time, terminal fault, single-phase ground fault, out-of-phase ground fault" and other terms and definitions (see Chapter 3);
--- Deleted "Indoor switchgear and control equipment, outdoor switchgear and control equipment, ground fault coefficient, self-recovery insulation, non
Terms and definitions such as "self-recovering insulation, cable system, line system" (see Chapter 3 of the.2014 edition);
--- Changed the "transient recovery voltage related to rated short-circuit breaking current", "near-zone fault characteristics", "rated time parameters", "mechanical operation
The number of times "according to the classification of electrical life" is located in the text (see 7.105, 7.109, 6.105, 7.101, 6.107,.2014 edition
4.102, 4.105, 4.109, 4.110, 4.111);
--- Deleted "Rated single capacitor bank closing inrush current, inductive load opening and closing", "CO-t-CO" in the rated operation sequence (see
4.107.5, 4.108, 4.104 of the.2014 edition);
--- Added "rated first open pole coefficient" (see 5.1);
--- Deleted the requirements of items 2, 3, 4, 7, and 10 in auxiliary equipment (see 5.4 of the.2014 edition);
--- Added the requirements for "manually operated drives", "time parameters", "mechanical loads" and "circuit breaker classification" (see 6.8, 6.105,
6.106 and 6.107);
--- Deleted the requirements on the number of type test products and test grouping (see 6.1.1 of the.2014 edition);
--- Added "insulation test" [see 7.1.1c)];
--- Deleted "Terminal static load test" (see Table 11 and 6.101.6 of the.2014 edition), "Shunt reactor and motor opening and closing test"
(see Table 11 of the.2014 edition);
--- Added "X-ray test" and "noise level test" (see Table 5);
--- Added "repeated type test on circuit breaker with alternative operating mechanism" (see 7.1.102);
--- Added the requirements for partial discharge test of "GIS circuit breakers and circuit breakers with no power on the enclosure" (see 7.2.10);
--- Changed the status inspection requirements after mechanical or environmental tests and after closing and breaking tests (see 7.2.12.101, 7.2.12.102,
Table 8, 6.2.11, 6.101.1.4, 6.102.9 of the.2014 edition);
--- Deleted "Explanation of temperature rise test" (see 6.5.6 of the.2014 edition);
--- Deleted the corresponding requirements for circuit breakers equipped with direct overcurrent releases and self-tripping circuit breakers (see 6.6.1 of the.2014 edition), "
performance of the circuit breaker during the test” (see 6.6.3 of the.2014 edition);
--- Added "No mandatory requirements for fluids used for insulation and/or opening and closing. Air or nitrogen can be used as a substitute for fluids that may cause global warming.
There is no requirement for the minimum pressure of the filled fluid" (see 7.6.2);
--- Added the use temperature requirements for products that need to undergo high and low temperature tests (see 7.101.3.1);
--- Added "Additional requirements for outdoor metal-enclosed circuit breakers" (see 7.101.3.2);
--- Added "the closing and breaking tests carried out according to level S2 cover the closing and breaking tests of level S1" (see 7.102.1);
--- Added the combined requirements for verification tests when both 50 Hz and 60 Hz tests are required (see 7.102.4.1);
--- Added "Within 1/4 power frequency cycle after breaking, the power frequency current of any pole shall be broken by the circuit breaker.
After the short circuit of the pole is broken for the first time, the reappearance of the power frequency current after more than 1/4 power frequency cycle is a breaking failure. "(See 7.102.8);
--- Changed the requirements for "circuit breaker status after test" (see 7.102.9, 6.102.9 of the.2014 edition);
--- Added inspection methods and requirements for the continuous current carrying capacity of lifetime sealed circuit breakers (see 7.102.9.4);
--- Changed the time when the power frequency recovery voltage can be reduced to Ur/3 [see 7.103.4b), 6.104.7b of the.2014 edition)];
--- Changed the provisions on arcing time (see 7.104, 6.102.10 of the.2014 edition);
--- Changed the range of the "minimum breaking time" and other relevant parameters and test procedure requirements related to T100a (see
7.104.2.2, 6.102.10.1.2 of the.2014 edition);
--- Changed the effective criterion of test method T100a, changing the I×Δt “product between 81% and 121% of the required value” to “I×
Δt "the product is between 90% and 110% of the required value" (see 7.104.2.2, 7.104.3.3, 6.102.10 of the.2014 edition);
--- Added and modified Table 11, replacing Tables 15 to 19 (see Table 11, Tables 15 to 19 of the.2014 edition);
--- Added "tests covering kpp = 1.3 and kpp = 1.5 conditions" for the three-phase test (see 7.104.2.3);
--- Changed the amplitude coefficients of T10 and T30 in the expected TRV of S1 class circuit breakers (see Table 16, Table 21 of the.2014 edition);
--- Added the expected TRV of S2 class circuit breakers with three rated voltage levels of 3.6kV, 7.2kV and 12kV (see Table 17,.2014 edition
Table 22);
--- Changed the amplitude coefficients of T100 and T10 for rated voltage greater than 800kV; for test method T100, t2 is changed from “t2=
4t1" is changed to "t2=3t1"; for test method T60, t2 is changed from "t2=6t1" to "t2=4.5t1";
TRV is changed from four parameters to two parameters [see 7.105.5.1c), Table 23 of the.2014 edition];
--- Changed the arcing time during breaking operation and other contents (see 7.108.2.3, 6.108.3 of the.2014 edition);
--- Changed the wave impedance and RRRV coefficient of the near-field fault test with rated voltage greater than 800kV (see Table 25, Table 8 of the.2014 edition);
--- Changed the expected TRV standard value of the near-fault power supply circuit in Table 26 to 24kV, 40.5kV, 72.5kV,
Some parameters of 1100kV (see Table 26, Table 2 to Table 5 of the.2014 edition);
--- Changed the requirements for levels C1 and C2 in the capacitive current test (see 7.111, 6.111 of the.2014 edition);
--- Added circuit breakers with rated voltage greater than 800kV, capacitive voltage coefficient kc = 1.3 (see 7.111.7);
--- Changed the step size of the capacitive current opening and closing test (see 7.111.9, 6.111.9 of the.2014 edition);
--- Increased the maximum number of tests for each test method in the capacitive current opening and closing test (see 7.111.9);
--- Deleted the test number requirements and preferred test sequence for the longest arcing time in Class C1; deleted the requirements for lines and circuits in Class C2.
The preferred test sequence for cable opening and closing tests (see 6.111.9.1 and 6.111.9.2 of the.2014 edition);
--- Changed the position of "Verification of capacitive current interruption in the presence of single-phase or two-phase ground fault" in the text (see Appendix J,.2014 Edition
6.111.9.3);
--- Deleted the relevant description of the "order" of the electrical life test (see 6.112.2 of the.2014 edition);
--- Increased the injection energy percentage of sequence 4 (see Table 30);
--- Added the calculation of equivalent gas pressure when pure SF6 gas is used for the insulation test of the main circuit of the circuit breaker using mixed gas
Calculate (see 8.2);
--- Added "partial discharge measurement" (see 8.2.101);
--- Added the parameters of rated short-circuit making current at 60Hz (see 9.103.4);
--- Deleted the determination of short-circuit power factor (see Appendix D of the.2014 edition);
--- Deleted the calculation of TRV parameters under asymmetric fault conditions (T100a) (see Appendix P of the.2014 edition);
--- Added the normative appendix "Verification of capacitive current interruption in the presence of single-phase or two-phase ground fault" (see Appendix J).
This document is modified to adopt IEC 62271-100.2021 "High-voltage switchgear and controlgear Part 100.AC circuit breakers".
This document has made the following structural adjustments compared to IEC 62271-100.2021.
--- Appendix A corresponds to Appendix B of IEC 62271-100.2021;
--- Appendix B corresponds to Appendix C of IEC 62271-100.2021;
--- Appendix C corresponds to Appendix G of IEC 62271-100.2021;
--- Appendix D corresponds to Appendix H of IEC 62271-100.2021;
--- Appendix E corresponds to Appendix I of IEC 62271-100.2021;
--- Appendix F corresponds to Appendix D of IEC 62271-100.2021;
--- Appendix G corresponds to Appendix E of IEC 62271-100.2021;
--- Appendix H corresponds to Appendix F of IEC 62271-100.2021;
--- Appendix I corresponds to Appendix A of IEC 62271-100.2021.
The technical differences between this document and IEC 62271-100.2021 and their reasons are as follows.
--- According to the power grid situation in my country, the applicable frequency range is changed from "50Hz and/or 60Hz" to "50Hz", and the
Part of IEC 62271-100.2021 with a rated frequency of 60 Hz (see Chapter 1);
--- Applicable voltage range. According to the power grid situation in my country, the rated voltage is changed from 1000V to 3kV, and the content related to the rated voltage is deleted.
1200kV related parameters; added "This document also applies to the operating mechanism and auxiliary equipment of the circuit breaker" and "circuit breaker
The inductive load switching is included in GB/T 29489 "Circuit breakers for power supply and distribution systems of electrified railways. This type of circuit breaker includes
In GB/T 32580.1" (see Chapter 1);
--- Regarding normative references, this document has made adjustments with technical differences to adapt to my country's technical conditions.
as follows.
GB/T 762 replaces IEC 60059 (see 5.101.2);
· GB 2536 replaces IEC 60296 (see 11.3.102.1.4);
GB/T 4473 replaces IEC 62271-101, GB/T 8905 replaces IEC 60480 (see 7.102.5, 7.103.4,
7.107.5.2~7.107.5.4);
· Replace IEC 60077 (all parts) with GB/T 21413 (all parts) (see Chapter 1);
GB/T 29489 replaces IEC 62271-110 (see Chapter 1 and 9.101);
GB/T 30846 replaces IEC /T R62271-302 (see 7.111.2);
· Added GB/T 28534, GB/T 32580.1, JB/T 3855, JB/T 9694 (see Chapter 1, 9.104 and
11.3.102.1.4);
--- Deleted "Closing and breaking test" and "3.8 Definition Index";
--- Added "DC time constant of short-circuit breaking current" and "fault type" (see 3.1.129, 3.8);
--- Added "5.12 Rated filling pressure/level for insulation and/or switching", which is consistent with GB/T 11022-2020 (see 5.12);
--- Deleted the relevant content of the first-pole coefficient kpp=1.2 in the whole text;
--- Deleted "near-zone fault breaking current" in Table 2 (see Table 2);
--- Changed the longitudinal horizontal force of 252kV~363kV, the longitudinal horizontal force and transverse horizontal force of 550kV~800kV in Table 3
Force, 1100kV longitudinal horizontal force and transverse horizontal force (see Table 3);
--- Deleted the term "direct connection to overhead lines" and moved its content to 6.107.3 (see 6.107.3);
--- Added verification requirements and type test cycle requirements for products transferred to other factories and produced in other places (see 7.1.1) to adapt to my country
Specific circumstances;
--- Deleted the requirement that GIS circuit breakers above 363kV should be carried out in accordance with GB/T 7674, and unified the value to be taken in accordance with GB/T 11022
(see 7.2.12.103);
--- Added requirements for pneumatic and hydraulic operating mechanisms (see 7.102.6);
--- Changed the time for the power frequency current to reappear after breaking (see 7.102.8);
--- Added power factor requirements (see 7.103.2);
---Deleted the TRV parameter of the first opening coefficient kpp=1.3 for S1 and S2 class circuit breakers, and changed the
First open pole coefficient (see 7.105.5.1);
--- Changed the test method, arcing time, etc. of single-phase ground fault and out-of-phase ground fault test (see 7.108.2);
--- Changed the capacitive voltage coefficient of circuit breakers with rated voltage above 800kV (see 7.111.7);
--- Added voltage requirements for combined tests (see 7.111.9.1);
--- Added sequence 4 and the injection energy percentage of sequence 4 (see Table 30);
--- Added "noise level test" (see 7.113);
--- Changed the rated short-circuit duration (see 9.103.6) to be consistent with 5.8 of GB/T 11022-2020;
--- Added calculation examples for near-field faults with "delay on the power supply side and no delay on the line side" (see Table 7.4).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Switchgear (SAC/TC65).
The previous versions of this document and the documents it replaces are as follows.
--- First published in 1980 as GB 1984-1980, first revised in 1989;
---In the second revision in.2003, GB/T 4474-1992 "Close-range fault test for AC high voltage circuit breakers" was incorporated
(The previous versions of GB/T 4474 are. GB 4474-1984) and GB/T 7675-1987 "AC High Voltage Circuit Breakers"
The contents of the opening and closing capacitor bank test;
--- Revised for the third time in.2014;
---This is the fourth revision.
High voltage AC circuit breaker
1 Scope
This document specifies the operating conditions, ratings, design and structure, type testing and factory testing requirements for high voltage AC circuit breakers.
This document is applicable to three-phase power systems designed for installation indoors or outdoors and operating at voltages of 3kV and above and frequencies of 50Hz.
The invention is applicable to three-pole high voltage AC circuit breakers and also to the operating mechanisms of circuit breakers and their auxiliary equipment.
The closing and opening test methods described in this document only include direct test methods. For synthetic test methods, see GB/T 4473.
NOTE The direct test method involves the use of a single source to provide voltage and current during making and breaking tests.
The inductive load switching of circuit breakers is included in GB/T 29489.
This document does not apply to.
---Circuit breakers that rely on manual operation to operate the closing mechanism;
--- Circuit breakers for mobile power supplies for electric traction equipment. Such circuit breakers are included in GB/T 21413 (all parts);
--- Circuit breakers for power supply and distribution systems of electrified railways. Such circuit breakers are included in GB/T 32580.1;
--- Generator circuit breakers installed between the generator and the step-up transformer. Such circuit breakers are included in GB/T 14824;
--- Self-tripping circuit breakers whose tripping devices cannot be disabled during the test. The test of automatic reclosers is specified in GB/T 25284;
--- Tests not described in this document to verify performance under abnormal conditions shall be carried out according to the agreement between the manufacturer and the user.
Abnormal conditions such as those caused by a sudden loss of load on a long transmission line or cable may cause the voltage to be higher than the rated voltage of the circuit breaker.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 762 Standard current levels (GB/T 762-2002, eqvIEC 60059.1999)
GB/T 1985-2023 High voltage AC disconnectors and earthing switches (IEC 62271-102.2022, MOD)
Note. There is no technical difference between the referenced content of GB/T 1985-2023 and the referenced content of IEC 62271-102.2022.
GB 2536 Unused mineral insulating oil for electrical fluid transformers and switches (GB 2536-2011, IEC 60296.
2003, MOD)
GB/T 2900.20-2016 Electrical terminology High-voltage switchgear and controlgear (IEC 60050-441.1984, MOD)
Note. There is no technical difference between the referenced content of GB/T 2900.20-2016 and the referenced content of IEC 60050-441.1984.
GB/T 3906-2020 3.6kV~40.5kV AC Metal-enclosed Switchgear and Controlgear (IEC 62271-200.
2011,MOD)
Note. There is no technical difference between the referenced content of GB/T 3906-2020 and the referenced content of IEC 62271-100.2011.
GB/T 4109-2022 Insulating bushings for AC voltages above 1000V (IEC 60137.2017, MOD)
Note. There is no technical difference between the referenced content of GB/T 4109-2022 and the referenced content of IEC 60137.2017.
GB/T 4473 Synthetic test for high voltage AC circuit breakers (GB/T 4473-2018, IEC 62271-101.2017, MOD)
GB/T 7674-2020 Gas-insulated metal-enclosed switchgear with rated voltage of 72.5 kV and above (IEC 62271-203.
2011,MOD)
Note. There is no technical difference between the referenced content of GB/T 7674-2020 and the referenced content of IEC 62271-203.2011.
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