GB 1985-2014High-voltage alternating current disconnectors and earthing switches (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 1985-2014 "High Voltage AC Isolating Switches and Grounding Switches". Compared with GB/T 1985-2014, except for the in addition to structural adjustments and editorial changes, the main technical changes are as follows.

---Deleted "temperature rise", "M0 level isolating switch", "M1 level isolating switch", "M2 level isolating switch", "E0 level grounding switch" and "E1 level "Grounding switch" "E2 class grounding switch" "M0 class grounding switch" "M1 class grounding switch" "M2 class grounding switch" "Interlocking device" Definitions such as "normal current", "rated value" and "impulse withstand voltage"; (see 3.1.103, 3.4.101.1, 2014 edition) 3.4.101.2, 3.4.101.3, 3.4.105.1, 3.4.105.2, 3.4.105.3, 3.4.105.4, 3.4.105.5, 3.4.105.6, 3.6.112, 3.7.103, 3.7.106, 3.7.109, etc.);

---Changed the definitions of "final assembly of switchgear and control equipment", "components of the final assembly", "inflection point" and "insulation level" (see 3.2, 3.3, 3.6.112, 3.7.105, etc., 2014 version of 3.2, 3.3, 3.4.105.8, 3.7.107, etc.);

---Added "test product", "isolating switch with resistance", "isolating load switch", "position indicating device", "power transmission chain" and "position indication" "Transmission chain", "Position signal transmission chain", "Connection point", "Stress limiting device", "Torque (force) control system", "Energy source", "Mechanical service life" "Lightning impulse withstand voltage", "Operation impulse withstand voltage", "Busbar conversion current", "Busbar conversion voltage", "Electromagnetic induction current" "flow", "electrostatic induction current", "opening and closing capacitive current", "capacitive current", "opening and closing bus charging current", "bus charging current", "instantaneous to ground" Definitions such as "state voltage", "rated charging pressure for insulation and/or switching" and "minimum functional pressure for insulation and/or switching" (see 3.2.1, 3.4.105, 3.4.106, 3.5.108, 3.5.112, 3.5.113, 3.5.114, 3.5.115, 3.5.116, 3.5.117, 3.5.118, 3.6.113, 3.7.107, 3.7.108, 3.7.122, 3.7.123, 3.7.125, 3.7.126, 3.7.127, 3.7.128, 3.7.129, 3.7.130, 3.7.131, 3.7.132, 3.7.133, etc.);

---Modify "rated current and temperature rise" to "rated continuous current" (see 5.5, 4.5 of the 2014 version);

---Divide "rated pressure of compressed air source for controllable pressure systems" into "rated pressure of compressed air source for insulation and/or opening and closing" and "Rated pressure of compressed air source for operation" (see 5.11.101 and 5.11.102);

---Modify "Classification of electrical life of grounding switch" to "Classification of short-circuit closing ability of grounding switch" (see 5.102, 2014 version 4.107);

---Changed the rated voltage range of the rated contact area in 5.103 (see Table 2 and Table 3, Table 1 and Table 2 of the 2014 version);

---Increased the rated value of ice coating thickness (see 5.107);

---Added a Class C grounding switch with the ability to switch inductive currents and gave standard values for rated inductive currents and voltages (see

Table 8 and Table 9);

---Added "grading of the isolating switch's switching and busbar charging current capabilities" (see Table 10);

---Change "Rating of small capacitive current switching capacity of isolating switch" to "Rating of small capacitive current switching capacity of air insulated isolating switch" "Rating" (see 5.110.2, 4.108 of the 2014 edition);

---Changed the content of "Grounding of isolating switches and grounding switches" (see 6.3, 5.3 of the 2014 edition);

---Changed the content of "power operation" (see 6.5, 5.5 of the 2014 version);

---Change "operations that do not rely on manpower" to "operations that do not rely on non-locking (operations that do not rely on manpower or power)" (see 6.

7,2014 version 5.7);

---Added "human-operated driver" (see 6.8);

---Modify "low pressure and high pressure locking and monitoring devices" to "pressure/level indication" (see 6.10, 5.9 of the 2014 version);

---Changed the content of "nameplate" (see 6.11, 5.10 of the 2014 version);

---Changed the content of "interlocking device" (see 6.12, 5.11 of the 2014 version);

---Changed the content of "Special requirements for grounding switches" (see 6.101, 5.101 of the 2014 version);

---Changed the content of "Requirements for isolation break of isolating switch" (see 6.102, 2014 version of 5.102);

---Changed the content of "mechanical strength" (see 6.103, 5.103 of the 2014 version);

---Changed the content of "Position indication and position signal" (see 6.104.3, 5.104.3 of the 2014 version);

---Modify "maximum force allowed for human operation" to "maximum force (depending or not relying on) human operation" (see 6.105, 2014 edition of 5.105);

---Changed the maximum force value for human operation "operations requiring more than one turn" (see 6.105.2, 2014 version of 5.105.2);

---The "Overview" and "Test Grouping" of "Type Test" have been changed, and the "Test Grouping" has been modified and merged into the "Overview" section (see 7.1.1, 6.1.1 and 6.1.2 of the 2014 edition);

---Changed the content of "Information contained in the type test report" (see 7.1.3, 6.1.4 of the 2014 version);

---Modify "the status of the isolating switch and the grounding switch during the insulation test" to "the layout of the equipment" (see 7.2.4, 6.2.4 of the 2014 version);

---Changed the content of "Criteria for passing the test" (see 7.2.5, 6.2.5 of the 2014 version);

---The "power frequency withstand voltage" table of the isolating switch during the insulation test has been changed, and the neutral point grounded and ungrounded conditions are not distinguished (see

Table 14, Table 7 of 2014 version);

---Changed the content of "Partial Discharge Test" (see 7.2.10, 6.2.10 of the 2014 version);

---Change "temperature rise test" to "continuous current test" (see 7.5, 6.5 of the 2014 edition);

---Changed the contents of the "general test conditions" for isolating switches and grounding switches during short-time withstand current and peak withstand current tests (See 7.6.2.101, 6.6.2.101 of the 2014 edition);

---Change "Isolating switches and grounding switches with rated voltage 40.5kV and below" to "Isolating switches and grounding switches with Ur <= 40.5kV "Earth switch", and the content has been modified (see 7.6.2.102, 6.6.2.102 of the 2014 version);

---Change "Isolating switches and grounding switches with rated voltage 72.5kV and above" to "Isolating switches and grounding switches with Ur >40.5kV "Earth switch", and the content has been modified (see 7.6.2.103, 6.6.2.103 of the 2014 version);

---Deleted the content of "Performance of the isolating switch and grounding switch during the test" (see 6.6.4 of the 2014 version);

---Changed the content of "Status of the isolating switch and grounding switch after the test" (see 7.6.4, 6.6.5 of the 2014 version);

---Modify "X-ray test procedure of vacuum interrupter" to "X-ray test of vacuum interrupter", and modify the content (See 7.11, 6.11 of the 2014 edition);

---Changed the content of "test voltage" in "Grounding switch short-circuit closing ability test" (see 7.101.4, 2014 version of 6.101.4);

---Changed the content of "operation and mechanical life test" (see 7.102, 2014 version of 6.102);

---Changed the content of "Operation under severe freezing conditions" (see 7.103, 2014 version of 6.103);

---Modify "Operation at Extreme Temperature" to "Low and High Temperature Test", and modify the content (see 7.104, 2014 edition of 6.104);

---Changed the test requirements for "correct function verification test of position indicating device" (see 7.105, 2014 version of 6.105 and Appendix A);

---Added the standard value of recovery voltage for Class C grounding switch breaking electromagnetic induction current test (see Table 17);

---Added the capacitance (C1 value) of the test circuit for the Class C grounding switch opening and closing electrostatic induction current test (see Table 18);

---Change "small capacitive current switching test" to "isolating switch switching capacitive current test" (see 7.108 and Appendix C, 2014 edition 6.108, Appendix F and Appendix H);

---Changed the "Overview" content of "Factory Test" (see 8.1, 7.1 of the 2014 version);

---Changed the application position and grounding position of the power frequency voltage in the "factory test" of the isolating switch "main circuit insulation test" (see

Table 21, Table 10 of the 2014 version);

---Changed the content of "mechanical operation test" of "factory test" (see 8.101, 2014 version of 7.101);

---Added the "Verification of Grounding Function" content of "Factory Test" (see 8.102);

---Deleted the contents of "seismic conditions" and "use in high altitude areas" (see 8.102.8 and 8.102.9 of the 2014 version);

--- Added the contents of "cable interface aspects" and "continuous or temporary overload caused by changes in operating conditions" (see 9.3, 9.4);

---Changed the content of "Information provided with inquiries, bids and orders (informative)" (see Chapter 10, Chapter 9 of the 2014 edition);

---Changed the content of "security" (see Chapter 12, Chapter 11 of the 2014 edition);

---Added normative appendix E and normative appendix F;

---Deleted the 2014 version of normative appendix A, appendix B, appendix C, appendix E and appendix F.

This document is modified to adopt IEC 62271-102:2022 "High-voltage switchgear and control equipment - Part 102: AC isolating switches and connections" Ground switch".

Compared with IEC 62271-102:2022, this document has many structural adjustments. Comparison of structure number changes between two files 1 See Appendix A for the list.

Compared with IEC 62271-102:2022, there are many technical differences between this document and the clauses involved.

Vertical single lines (|) are marked. A list of these technical differences and their causes is provided in Appendix B.

The following editorial changes have been made to this document.

---In order to be consistent with my country's standard system, the name of this document is changed to "High Voltage AC Isolating Switch and Grounding Switch";

---Change "Chapter 2" in item 7.104.3c) to "Chapter 4", the original IEC text is wrong;

---Adjusted the order of references.

Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.

Introduction

This document is used in conjunction with GB/T 11022-2020.Compared with GB/T 11022-2020, this document has new sections, annotations, and tables and the figures are numbered starting from 101.

High voltage AC isolating switch and earthing switch

1 Scope

This document specifies the normal and special operating conditions, ratings, and design and structural requirements for high-voltage AC isolating switches and earthing switches.

It describes the corresponding type test and factory test test methods, provides selection guidelines, and stipulates transportation, storage, installation, operation and maintenance.

This document is suitable for systems designed and installed indoors and outdoors, operating at a frequency of 50Hz and below, and a nominal voltage of 3kV and above.

AC isolating switch and grounding switch.

This document also applies to the operating mechanisms of these disconnectors and earthing switches and their auxiliary equipment.

Additional requirements for isolating switches and earthing switches in enclosed switchgear and control equipment are in GB/T 3906-2020 and Given in GB/T 7674-2020.

This document also applies to switchgear having, among other functions, isolating and/or earthing functions, such as fast earthing switches, circuit breakers and load switch.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations for undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 311.1-2012 Insulation coordination Part 1: Definitions, principles and rules (IEC 60071-1:2006, MOD) GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without tolerances noted (eqvISO 2768-1.1989) GB/T 1984-2014 High-voltage AC circuit breaker (IEC 62271-100:2008, MOD) GB/T 2900.19-2022 Electrical terminology high voltage test technology and insulation coordination GB/T 2900.20-2016 Electrical terminology High-voltage switchgear and control equipment (IEC 60050-441:1984, MOD) GB/T 2900.57-2008 Electrical terminology for power generation, transmission and distribution operations (IEC 60050-614:1987, MOD) GB/T 2900.83-2008 Electrical terminology Electrical and magnetic devices (IEC 60050-151:2001, IDT) GB/T 3906-2020 3.6kV~40.5kV AC metal-enclosed switchgear and control equipment (IEC 62271-200.

2011,MOD)

GB/T 4208-2017 Enclosure protection level (IP code) (IEC 60529:2013, IDT) GB/T 4473-2018 Synthetic test of high-voltage AC circuit breakers (IEC 62271-101:2017, MOD) GB/T 7674-2020 Gas-insulated metal-enclosed switchgear with rated voltage 72.5kV and above (IEC 62271-203.

2011,MOD)

GB/T 11022-2020 Common technical requirements for high-voltage AC switchgear and control equipment standards (IEC 62271-1:2017, MOD) GB/T 20138-2006 Protection level of electrical equipment enclosures against external mechanical impact (IK code) (IEC 62262:2002, IDT) IEC/T R62271-305 High-voltage switchgear and control equipment Part 305: Air insulation isolation above rated voltage 52kV

3 Terms and definitions

GB/T 2900.19-2022, GB/T 2900.20-2016, GB/T 2900.57-2008, GB/T 2900.83-2008 and the terms and definitions defined in GB/T 11022-2020 and the following apply to this document.