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GB/T 1985-2023 English PDF

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GB/T 1985-2023: High-voltage alternating current disconnectors and earthing switches
Status: Valid

GB/T 1985: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 1985-20231959 Add to Cart 10 days High-voltage alternating current disconnectors and earthing switches Valid
GB 1985-2014RFQ ASK 13 days [GB/T 1985-2014] High-voltage alternating-current disconnectors and earthing switches Obsolete
GB 1985-2004RFQ ASK 14 days High-voltage alternating-current disconnectors and earthing switches Obsolete
GB 1985-1989919 Add to Cart 6 days Alternating current high-voltage disconnectors and earthing switches Obsolete

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GB/T 11022   GB/T 3906   GB/T 30092   GB/T 1984   GB 1984   

Basic data

Standard ID: GB/T 1985-2023 (GB/T1985-2023)
Description (Translated English): High-voltage alternating current disconnectors and earthing switches
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K43
Classification of International Standard: 29.130.10
Word Count Estimation: 98,943
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Older Standard (superseded by this standard): GB/T 1985-2014
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 1985-2023: High-voltage alternating current disconnectors and earthing switches

---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 Standards of People's Republic of China Replace GB/T 1985-2014 High voltage AC isolating switch and earthing switch Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface Ⅶ Introduction Ⅺ 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 3.1 General terms and definitions 2 3.2 Final assembly of switchgear and control equipment2 3.3 Components of final assembly 2 3.4 Switchgear 2 3.5 Components of switchgear 3 3.6 Operation 5 3.7 Characteristic parameters 7 4 Normal and special conditions of use10 5 Rated 10 5.1 General 10 5.2 Rated voltage (Ur) 11 5.3 Rated insulation level (Ud, Up, Us) 11 5.4 Rated frequency (fr) 11 5.5 Rated continuous current (Ir) 11 5.6 Rated short-time withstand current (Ik) 11 5.7 Rated peak withstand current (Ip) 11 5.8 Rated short-circuit duration (tk) 12 5.9 Rated supply voltage of auxiliary and control circuits (Ua) 12 5.10 Rated frequency of auxiliary and control circuit supply voltage12 5.11 Rated pressure of compressed air source for controllable pressure systems12 5.12 Rated filling pressure/level for insulation and/or opening and closing12 5.101 Rated short-circuit point closing current (Ima) 12 5.102 Classification of short-circuit making ability of earthing switches12 5.103 Rated contact area 13 5.104 Rated terminal static mechanical load 14 5.105 Classification of mechanical life of isolating switches14 5.106 Classification of mechanical life of earthing switches15 5.107 Rated ice thickness 15 5.108 Rating of bus switching current of isolating switch 15 5.109 Classification and rating of earthing switch switching induced current capability16 5.110 Classification and rating of isolating switch’s ability to switch capacitive current17 5.111 Rating of the isolating switch's ability to switch small inductive currents18 6 Design and Structure18 6.1 Requirements for liquids in isolating and earthing switches18 6.2 Requirements for gases in disconnectors and earthing switches18 6.3 Grounding of isolating switches and earthing switches18 6.4 Auxiliary and control equipment and circuits18 6.5 Power operation 18 6.6 Energy storage operation 18 6.7 Operations that do not rely on non-locking (operations that do not rely on manpower or power) 19 6.8 Human-operated drives 19 6.9 Trip unit operation 19 6.10 Pressure/Level Indication19 6.11 Nameplate 19 6.12 Interlocking device 22 6.13 Position indication 22 6.14 Degree of protection provided by the enclosure22 6.15 Creepage distance of outdoor insulators 22 6.16 Gas and vacuum sealing 22 6.17 Hydraulic seals 22 6.18 Fire (flammability) 22 6.19 Electromagnetic compatibility (EMC) 22 6.20 X-ray emission 22 6.21 Corrosion 22 6.22 Filling pressure/level for insulation and/or opening and closing, operation22 6.101 Special requirements for earthing switches22 6.102 Requirements for the isolation break of the isolating switch 22 6.103 Mechanical strength 22 6.104 Operation of isolating switches and earthing switches - location of movable contact system and its indication and signaling devices 22 6.105 Maximum force for human operation (with or without dependence) 24 6.106 Dimensional tolerance 24 6.107 Earthing switches with the ability to make short-circuit currents24 7 Type test 24 7.1 General 24 7.2 Insulation test 27 7.3 Radio interference voltage test (RIV) 29 7.4 Loop resistance measurement 29 7.5 Continuous current test 29 7.6 Short-time withstand current and peak withstand current tests 29 7.7 Protection level verification36 7.8 Sealing test 36 7.9 Electromagnetic compatibility test (EMC) 36 7.10 Additional tests of auxiliary and control circuits36 7.11 X-ray test of vacuum interrupter 36 7.101 Grounding switch short-circuit closing ability test 36 7.102 Operational and mechanical life tests 39 7.103 Operation under severe freezing conditions 44 7.104 Low and high temperature tests 46 7.105 Verification test for correct function of position indicating device 49 7.106 Test of bus switching current of isolating switch 49 7.107 Earthing switch opening and closing induced current test 52 7.108 Isolating switch switching capacitive current test 57 7.109 Isolating switch opening and closing small inductive current test 62 8 Factory test 63 8.1 General 63 8.2 Insulation test of main circuit 63 8.3 Testing of auxiliary and control loops 63 8.4 Measurement of main circuit resistance 64 8.5 Sealing test 64 8.6 Design inspection and appearance inspection 64 8.101 Mechanical operation test 64 8.102 Verification of ground function 64 9 Guidelines for Selection of Isolating Switches and Grounding Switches 65 9.1 General 65 9.2 Selection of rating 65 9.3 Cable interface 67 9.4 Sustained or temporary overload caused by changes in operating conditions 67 9.5 Environmental aspects 67 10 Information provided with inquiries, bids and orders (informative) 67 10.1 Overview 67 10.2 Information provided with inquiries and orders67 10.3 Information provided with the tender documents69 11 Transport, storage, installation, operation and maintenance rules 70 11.1 Overview 70 11.2 Conditions for transportation, storage and installation70 11.3 Installation 70 11.4 Run 70 11.5 Maintenance 70 12 Security 70 12.1 Overview 70 12.2 Manufacturer’s precautions70 12.3 Precautions for users 70 13 Impact of products on the environment 71 Appendix A (informative) This document is compared with the regulation number of IEC 62271-102.2022 72 Appendix B (informative) Technical differences between this document and IEC 62271-102.2022 and their reasons 74 Appendix C (informative) Rated insulation level of isolating switch for neutral point grounding of power transformer 77 Appendix D (informative) Required switching current capabilities of isolating switches and grounding switches78 Appendix E (Normative) Tolerance of test parameters for type testing 80 Appendix F (informative) Extension of type test validity 81 Appendix G (informative) Test voltage for the most unfavorable insulation position (minimum temporary electrical gap) when the earthing switch is operated 82 Appendix H (Normative) Alternative test methods for short-circuit current closing test 83 Reference 85 Figure 1 Position indication/position signaling device 23 Figure 2 Three-phase test arrangement of isolating switch and earthing switch 30 Figure 3 Ur >40.5kV, using soft or hard wires, isolating switch and earthing switch with horizontal isolation break Single-phase test arrangement 32 Figure 4 Ur >40.5kV, using flexible conductors, single-column isolation switch with vertical isolation break (single-column earthing switch) Single-phase test arrangement 33 Figure 5 Ur >40.5kV, using hard wires, single-column isolating switch with vertical isolation break (single-column earthing switch) Single-phase test arrangement 34 Figure 6 The direction of the static contact is parallel to the support 40 Figure 7 The direction of the static contact is perpendicular to the support 41 Figure 8 Example of a single-column isolating switch (or single-column earthing switch) applying rated terminal mechanical load 42 Figure 9 Example of double-column isolating switch applying rated terminal mechanical load 42 Figure 10 Low temperature and high temperature test sequence 47 Figure 11 Example of test circuit for switching current test of switching busbar 51 Figure 12 Test circuit for switching electromagnetic induction current test 54 Figure 13 Test circuit for opening and closing electrostatic induction current test 55 Figure 14 Test circuit 59 of test mode 1 Figure 15 Typical voltage waveform (including VFT and FT components) 60 Figure 16 Test circuit 60 of test mode 2 Figure 17 Test circuit 61 of test mode 3 Figure D.1 Example of isolating switch with resistor 79 Table 1 Classification of short-circuit making ability of earthing switches12 Table 2 Recommended contact areas when static contacts are supported by flexible conductors13 Table 3 Recommended contact areas when static contacts are supported by hard wires13 Table 4 Recommended static mechanical loading of terminals14 Table 5 Classification of mechanical life of isolating switch15 Table 6 Classification of mechanical life of earthing switches15 Table 7 Rated bus conversion voltage of isolating switch 15 Table 8 Classification of grounding switch switching induced current capability16 Table 9 Rated induced current and voltage16 Table 10 Classification of isolating switch switching bus charging current capability17 Table 11 Standard values of rated bus charging current17 Table 12 Product information 19 Table 13 Type test 25 Table 14 Power frequency withstand voltage 28 Table 15 Closing time requirements38 Table 16 Invalid test 39 Table 17 Standard value of recovery voltage for breaking electromagnetic induction current test 54 Table 18 Capacitance (C1 value) of the test circuit for the switching electrostatic induction current test 56 Table 19 Test voltage for making and breaking tests58 Table 20 Number of tests 61 Table 21 Power frequency voltage test 63 Table A.1 Comparison of the regulation numbers of this document with IEC 62271-102.2022 72 Table B.1 Technical differences between this document and IEC 62271-102.2022 and their reasons 74 Table C.1 Rated insulation level of isolating switch for neutral point grounding of power transformer 77 Table D.1 Average impedance 78 Table E.1 Tolerances of test parameters for type testing 80

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 structur......
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