This standard applies to a.c. switchgear and controlgear designed for indoor and outdoor installation and for operation at service frequencies are 50Hz on systems having voltages at 3.0kV and above.
This standard applies to all high-voltage switchgear and controlgear except as otherwise specified in the relevant standards for the particular type of switchgear and controlgear.
Note: For the use of this standard, the voltage range of high voltage switchgear is the rated voltage at 3.6kVand above. Generally, they are divided into medium voltage switchgear, high voltage switchgear and extra high voltage switchgear. The rated voltage range of medium voltage switchgear is usually 3.6kV~40.5kV; the rated voltage range of high voltage switchgear is 72.5kV~252kV; the rated voltage range of extra high voltage switchgear is 363kV~800kV; the rated voltage range of ultra high voltage switchgear is 1100 kV or above.
1.2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 156 Standard Voltage (GB/T 156-2007, IEC 60038: 2002, MOD)
GB 311.1 Insulation Coordination for High-voltage Transmit and Transform Equipment (GB 311.1-2012, IEC 60071-1:2006, MOD)
GB/T 4025 Basic and Safety Principles for Man-machine Interface, Marking and Identification - Coding Principles for Indication Devices and Actuators (GB/T 4025-2010, IEC 60073-2002, IDT)
GB/T 4026 Basic and safety Principles for Man-machine Interface, Marking and Identification of Equipment Terminals and Terminations (GB/T 4026-2010, IEC 60445: 2006, IDT)
GB/T 4585 Artificial Pollution Tests on High-voltage Insulators to be Used on a.c. Systems (GB/T 4585-2004, IEC 60507: 1991, IDT)
GB/T 4728 Series Graphical Symbols for Electrical Diagrams (IEC 60617 (all parts), IDT)
GB/T 4796 Classification of Environmental Conditions of Electric and Electronic Products - Part 1: Environmental Parameters and Their Severities (GB/T 4796-2008, IEC 60721-1: 2002, IDT)
GB/T 4797 Series Environmental Conditions Appearing in Nature for Electric and Electronic Products (IEC 60721-2 (all parts), MOD)
GB/T 4798 Series Application Environment Conditions for Electric and Electronic Products (IEC 60721-3 (all parts), MOD)
GB/T 4824 Industrial, Scientific and Medical (ISM) Radio-frequency Equipment - Electromagnetic Disturbance Characteristics - Limits and Methods of Measurement (GB/T 4824-2013, IEC/CISPR 11: 2010, IDT)
GB/T 5013 Series Rubber Insulated Cables of Rated Voltages up to and Including 450/750V (IEC 60245 (all parts), IDT)
GB/T 5023 Series Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including 450/750V (IEC 60227 (all parts), IDT)
GB/T 5095.2 Electromechanical Components for Electronic Equipment - Basic Testing Procedures and Measuring Methods - Part 2: General Examination, Electrical Continuity and Contact Resistance Tests, Insulation Tests and Voltage Stress Tests (GB/T 5095.2-1997, IEC 60512-2:1994, IDT)
GB/T 5169 Series Fire Hazard Testing for Electric and Electronic Products (IEC/TS 60695 (all parts), IDT)
GB/T 5465.2 Graphical Symbols for Use on Electrical Equipment - Part 2: Graphical Symbols (GB/T 5465.2-2008, IEC 60417/DB: 2007, IDT)
GB/T 5732 Fixed Resistors for Use in Electronic Equipment - Part4: Sectional Specification: Fixed Power Resistors (GB/T 5732-1985, idt IEC 60115-4: 1982)
GB/T 7349 Methods of Measurement of Radio Interference from High Voltage Overhead Power Transmission Line and Substation (GB/T 7349-2002, IEC/CISPR 18:1983, MOD)
GB/T 7676.1 Direct Acting Indicating Analogue Electrical Measuring Instruments and Their Accessories - Part 1: Definition and General Requirements Common to All Parts (GB/T 7676.1-1998, idt IEC 60051-1: 1997)
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2 Normal and Special Service Conditions
2.1 General
Unless otherwise specified, high-voltage switchgear and controlgear, including the operating devices and the auxiliary equipment which form an integral part of them, are intended to be used in accordance with their rated characteristics and the normal service conditions listed in 2.2. If the actual service conditions differ from these normal service conditions, the manufacturer shall design product according to special requirements proposed by the user or appropriate agreement shall be made with the user (refer to 2.3).
Note 1: Appropriate action should also be taken to ensure proper operation under such conditions of other components, such as relays.
Note 2: Detailed information concerning classification of environmental conditions is given in GB/T 4798.3.
2.2 Normal Service Conditions
2.2.1 Indoor switchgear and controlgear
a) The ambient air temperature does not exceed 40℃ and its average value, measured over a period of 24h, does not exceed 35℃.
The preferred values of minimum ambient air temperature are -5℃, -15℃ and -25℃.
b) The influence of solar radiation may be neglected.
c) The altitude does not exceed 1 000m
1 General 1.1 Scope 1.2 Normative References 2 Normal and Special Service Conditions 3 Terms and Definitions 4 Ratings 4.1 General 4.2 Rated Voltage (Ur) 4.3 Rated Insulation Level 4.4 Rated Frequency (fr) 4.5 Rated Current and Temperature Rise 4.6 Rated Short-time Withstand Current (Ik) 4.7 Rated Peak Withstand Current (Ip) 4.8 Rated Short-circuit Period (tk) 4.9 Rated Supply Voltage of Closing and Opening Devices and of Auxiliary and Control Circuits (Ua) 4.10 Rated Supply Frequency of Closing and Opening Devices and of Auxiliary Circuits 4.11 Rated Pressure of Compressed Gas Supply for Controlled Pressure Systems 4.12 Rated Filling Levels for Insulation and/or Operation 5 Design and Construction 5.1 Requirements for Liquids in Switchgear and Controlgear 5.2 Requirements for Gases in Switchgear and Controlgear 5.3 Earthing of Switchgear and Controlgear 5.4 Auxiliary and Control Equipment 5.5 Dependent Power Operation 5.6 Stored Energy Operation 5.7 Independent Manual or Power Operation (Independent Unlatched Operation) 5.8 Operation of Releases 5.9 Low- and High-pressure Interlocking and Monitoring Devices 5.10 Nameplates 5.11 Interlocking Devices 5.12 Position Indication 5.13 Degrees of Protection Provided by Enclosures 5.14 Creepage Distances 5.15 Gas and Vacuum Tightness 5.16 Liquid Tightness 5.17 Fire Hazard (Flammability) 5.18 Electromagnetic Compatibility (EMC) 5.19 X-ray Emission 5.20 Corrosion 6 Type Tests 6.1 Overview 6.2 Insulation Tests 6.3 Radio Interference Voltage (r.i.v.) Test 6.4 Measurement of the Resistance of Circuits 6.5 Temperature-rise Tests 6.6 Short-time Withstand Current and Peak Withstand Current Tests 6.7 Verification of the Protection 6.8 Tightness Tests 6.9 Electromagnetic Compatibility Tests (EMC) 6.10 Additional Tests on Auxiliary and Control Circuits 6.11 X-radiation Test Procedure for Vacuum Interrupters 7 Routine Tests 7.1 General 7.2 Insulation Test on the Main Circuit 7.3 Tests on Auxiliary and Control Circuits 7.4 Measurement of the Resistance of the Main Circuit 7.5 Tightness Test 7.6 Design and Visual Checks 7.7 Mechanical Operation and Mechanical Characteristic Tests 7.8 Humidity Measurement for SF6 Switchgear 8 Guide to the Selection of Switchgear and Controlgear 8.1 General 8.2 Selection of rated values 8.3 Continuous or Temporary Overload due to Changed Service Conditions 9 Information to be Given with Enquiries, Tenders and Orders 9.1 General 9.2 Information with Enquiries and Orders 9.3 Information of Tenders 10 Transport, Storage, Installation, Operation and Maintenance 10.1 General 10.2 Conditions During Transport, Storage and Installation 10.3 Installation 10.4 Operation 10.5 Maintenance 11 Safety 11.1 General 11.2 Precautions by Manufacturers 11.3 Precautions by Users 11.4 Electrical Aspects 11.5 Mechanical Aspects 11.6 Thermal Aspects 11.7 Operation Aspects 12 Influence of the Product on the Environment Annex A (Normative) Identification of Test Specimens Annex B (Normative) Determination of the Equivalent r.m.s. Value of a Short-time Current during a Short Circuit of a Given Duration Annex C (Normative) Method for the Weatherproofing Test for Outdoor Switchgear and Controlgear Annex D (Normative) Requirements for Auxiliary and Control Circuit Components Annex E (Informative) Tightness (Information, Example and Guidance) Annex F (Normative) Tolerances on Test Quantities during Tests Annex G (Informative) Information and Technical Requirements to be Given with Enquiries, Tenders and Orders Annex H (Informative) Method of Testing Winding Temperature Rise by Resistance Annex I (Informative) Corrosion: Information Regarding Service Conditions and Recommended Test Requirements Annex J (Informative) List of Symbols and Abbreviations Used in This Standard Annex K (Informative) Note list Relate to Some Nations Annex L (Informative) Measurement of Electromagnetic Compatibility on Site Annex M (Informative) Condensation Test Method for Switchgear and Controlgear Bibliography
