GB 1984-2014High-voltage alternating-current circuit-breakers (English PDF)

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×deltat "product between 81% and 121% of the required value" to "I× deltat "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).

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.