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GB/T 32586-2016 English PDF

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GB/T 32586-2016: Railway applications -- Fixed installations -- Specific requirements for composite insulators used for overhead contact line systems for electric traction
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Basic data

Standard ID GB/T 32586-2016 (GB/T32586-2016)
Description (Translated English) Railway applications -- Fixed installations -- Specific requirements for composite insulators used for overhead contact line systems for electric traction
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard S82
Classification of International Standard 29.280
Word Count Estimation 21,298
Date of Issue 2016-04-25
Date of Implementation 2016-11-01
Quoted Standard GB/T 528; GB/T 1402-2010; GB/T 6553; GB/T 22079-2008; GB/T 25084-2010; GB/T 26218.1-2010; GB/T 26218.3-2011; GB/T 32350.1-2015; GB/T 32578; IEC 60826; IEC 61109-2008; IEC 61952-2008; ISO 34-1
Adopted Standard IEC 62621-2011, MOD
Regulation (derived from) National Standard Announcement No
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the characteristics, testing, marking, packaging, transportation, installation and maintenance of composite insulators (hereinafter referred to as "insulators") for overhead electric catenary overhead contact system of rail transit. This standard specifies the product characteristics, test methods and acceptance criteria. This standard applies to the nominal voltage is higher than 1000V AC voltage or not less than 1500V DC voltage insulator. For special applications exceeding the high torsional load specified in this standard, the test of the critical load layout shall be agreed upon by the supplier and the purchaser. This standard applies to composite insulators as defined in 3.1, excluding other polymer insulators. This standard is applicable to the design and manufacture of new or modified electric traction overhead contact system insulators. This standard test is used to guide the supply and demand sides to inspect the insulator product performance under the rail transit environment,

GB/T 32586-2016: Railway applications -- Fixed installations -- Specific requirements for composite insulators used for overhead contact line systems for electric traction


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Railway applications - Fixed installations - Specific requirements for composite insulators used for overhead contact line systems for electric traction ICS 29.280 S82 National Standards of People's Republic of China Rail transit ground unit electric traction overhead Specific requirements for composite insulators for catenary systems Published on.2016-04-25 Implementation of.2016-11-01 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Characteristics of composite insulators for overhead catenary systems 2 4.1 Overview 2 4.2 Working conditions 2 4.3 Electrical Performance 3 4.4 Creepage distance 3 4.5 Mechanical performance requirements 4 4.6 Corrosiveness 4 4.7 Combustion Safety 4 4.8 tracking and erosion 4 4.9 Arc Protection 4 4.10 Segmented Insulator 5 5 test 5 5.1 General 5 5.2 Design Test 5 5.3 Type test 6 5.4 Sampling test 7 5.5 Factory inspection 7 6 logo 7 7 Packaging, transportation, installation and maintenance 7 Appendix A (informative) User Requirements 9 Appendix B (informative) Damage load limit of composite insulators, relationship between loads and test principle 10 Appendix C (Informative) Non-standard mechanical load and dynamic mechanical load guidelines 13 Appendix D (informative) Determination of equivalent bending moments under combined loads 15 Reference 17

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the redrafting method to modify the use of IEC 62621.2011 "railway ground device electric traction overhead contact network Specific requirements for composite insulators for systems. There are technical differences between this standard and IEC 62621.2011. These differences involve the vertical margin of the margins of the clauses. (—) Marking. The technical differences between this standard and IEC 62621.2011 and their reasons are as follows. --- Modified the DC voltage range of composite insulators for use in subways (see Chapter 1). ---About the normative reference documents, this standard has made technical adjustments to adapt to China's technical conditions, adjustments The situation is reflected in Chapter 2, “Regulatory References”. The specific adjustments are as follows. ● Replace ISO 37 with GB/T 528 (see Table 2); ● Replace IEC 60850.2007 with GB/T 1402-2010 (see 4.2); ● Replace IEC 60587 with GB/T 6553 (see Table 2); ● Replace IEC 62217.2005 with GB/T 22079-2008 (see 4.2 and Table 2); ● Replace IEC 61467.2008 with GB/T 25084-2010 (see 4.9 and 4.10); ● Replace IEC 60815-1.2008 with GB/T 26218.1-2010 (see 4.2 and 4.4); ● Replace IEC /T S60815-3.2008 with GB/T 26218.3-2011 (see 4.4); ● Replace IEC 62497-1.2010 with GB/T 32350.1-2015 (see 4.2 and 4.3); ● Replace IEC 60913 with GB/T 32578 (see 4.2, 4.5 and 4.10). --- Revised the terminology of composite insulators (see 3.1). --- Revised the pollution level and creepage distance requirements, and implemented IEC 62497-1.2010 to implement GB/T 26218.1-2010, To adapt to the domestic high-voltage electrical appliances and rail transit industry (see Chapter 4). This standard also made the following editorial changes. ---Modified the standard name structure and simplified it as a composite insulator for the electric traction overhead contact network system of rail transit ground installations Specific requirements"; --- Removed the introduction of IEC 62621.2011; --- Revised the title of 4.2, from "environmental conditions" to "working conditions" to accommodate content position adjustment (see Chapter 4); --- Revised the title of 4.3, changed from "Power Supply Voltage and Frequency" to "Electrical Performance" to accommodate content position adjustment (see Chapter 4); --- Modified the position of 4.3 for the voltage and frequency, the rated impulse voltage of the line and the electrical clearance of the line, etc. Moved to 4.2 because 4.3 is only a requirement for the performance of composite insulators (see Chapter 4); --- Removed Note 5 of 4.4, as part of the IEC 60815 DC system has not been developed (see 4.4 of IEC 62621.2011); --- Added D.3 sub-sub-item number, in line with Chinese customs (see Appendix D). Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard was proposed by the National Railway Administration. This standard is under the jurisdiction of the National Traction Electrical Equipment and Systems Standardization Technical Committee (SAC/TC278). This standard is mainly drafted by. CSR Zhuzhou Times New Materials Technology Co., Ltd. Participated in the drafting of this standard. China Railway Fourth Survey and Design Institute Group Co., Ltd., China Railway Electrification Bureau Group Co., Ltd., China Railway Institute of Locomotive and Rolling Research, Institute of Electric Power, China Academy of Electric Power. The main drafter of this standard. Wang Jin. Participated in the drafting of this standard. Li Hongmei, Wang Zuoxiang, Guo Chenxi, Wu Guangya. Rail transit ground unit electric traction overhead Specific requirements for composite insulators for catenary systems

1 Scope

This standard specifies the characteristics, tests and standards of composite insulators (hereinafter referred to as insulators) for rail transit electric traction overhead contact network systems. Awareness, packaging, transportation, installation and maintenance. This standard specifies product characteristics, test methods and acceptance criteria. This standard applies to insulators with a nominal voltage higher than 1000V AC voltage or not less than 1500V DC voltage. For beyond this The special application of the high torsional load specified by the standard is determined by the supplier and the buyer to determine the critical load layout. This standard applies to composite insulators as defined in 3.1, excluding other polymer insulators. This standard applies to the design and manufacture of new or modified electric traction overhead contact network system insulators. The test of this standard is used to guide both the supply and demand sides to test the performance of the insulator products in the rail transit environment. The user may propose other tests. Verify the suitability of the insulator under special operating conditions.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 528 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber (GB/T 528-2009, ISO 37.2005, IDT) GB/T 1402-2010 Rail Traction Power Supply System Voltage (IEC 60850.2007, MOD) GB/T 6553 Test methods for assessing resistance to electrical traces and s (GB/T 6553-2014, IEC 60587.2007, IDT) GB/T 22079-2008 Indoor and outdoor polymer insulators with nominal voltages above 1000V are generally defined and tested. Law and acceptance criteria (IEC 62217.2005, MOD) GB/T 25084-2010 Insulator string and insulator string AC power frequency for overhead lines with nominal voltage higher than 1000V Arc test (IEC 61467.2008, MOD) GB/T 26218.1-2010 Selection and sizing of high-voltage insulators for use under filth conditions Part 1. Definitions, information And general principles (IEC /T S60815-1.2008, MOD) GB/T 26218.3-2011 Selection and sizing of high-voltage insulators for use under s Composite insulator (IEC /T S60815-3.2008, MOD) GB/T 32350.1-2015 Rail insulation insulation - Part 1. Basic requirements Electrical and electronic equipment clearance Creepage distance (IEC 62497-1.2010, MOD) GB/T 32578 rail transit ground unit electric traction overhead contact network (GB/T 32578-2016, IEC 60913. 2013, MOD) IEC 60826 overhead transmission line design standards (Designcriteriaofoverheadtransmissionlines) IEC 61109.2008 Suspension/tensile composite insulation for AC systems with nominal voltages above 1000V for overhead lines Sub-definition, test methods and acceptance criteria (Insulatorsforoverheadlines-Compositesuspensionandtensionin- sulatorsfora.c.systemswithanominalvoltagegreaterthan1000V-Definitions,testmethodsand Acceptancecriteria) IEC 61952.2008 Line-column composite insulation for AC systems with nominal voltages up to 1000 V for overhead lines Sub-definition, test methods and acceptance criteria (Insulatorsforoverheadlines-Compositelinepostinsulatorsfora.c. Systemswithanominalvoltagegreaterthan1000V-Definitions,testmethodsandacceptancecriteria) Rubber and rubber products - Determination of tear strength - Part 1 . Pants, right angles and crescents (Rub- Ber,vulcanizedorthermoplastic-determinationoftearstrength-Part 1.Trouser,angleandcrescent Testpieces)

3 Terms and definitions

The following terms and definitions as defined by IEC 61109.2008 and IEC 61952.2008 apply to this document. 3.1 Composite insulator compositeinsulator The composite insulator shall consist of at least two insulating parts, namely a mandrel fitted with an end attachment and an umbrella sleeve. Note. For example, a composite insulator can be constructed by mounting a single umbrella group on a mandrel, in which case the intermediate sheath may or may not be present; or the umbrella cover may be divided into a whole or a number Piece, directly molded or cast on the mandrel. 3.2 Normal working load (load) nominaldesignload The load specified by the user is related to the daily continuous dynamic load.

4 Characteristics of composite insulators for overhead catenary systems

4.1 Overview The insulating mandrel of the composite insulator is subjected to mechanical load, the polymer umbrella cover protects the mandrel, and the load is transmitted to the mandrel through the end fitting. due to Composite materials and polymers are lightweight, resistant to damage and resistant to contamination, so in overhead contact network systems (including segmented insulator insulators and support junctions) Widely used in construction. Different manufacturers use different materials and structural designs to form products with different characteristics. The rail transit electric traction overhead contact network system is different from the ordinary power grid. The main features are as follows. --- Usually cross the city and the height is low, so the insulator is easily damaged; --- In the narrow and small bridge tunnel space dedicated to rail vehicles, it is susceptible to impact damage and dust pollution of strong air currents; ---Be susceptible to pollution due to proximity to rail transit; ---The lack of natural washing under the tunnels and bridges; --- Due to the contact of the pantograph with the catenary, the insulator is subjected to the load generated by the moving friction; ---The high-speed operation of the pantograph can deform, tear and separate the polymer umbrella cover, so that the segmented insulator insulator can withstand the mechanical Load and wear (see 4.10). The design test gives a series of test methods, and the insulators with the same design conditions need only be tested once. In rail transit power Under the known stress conditions of the lead frame contact network system, if the design test can simulate the actual working time, environment and climate as much as possible The expected life expectancy of the test will be further affected by the mechanical and electrical properties of the insulator and some of its components (eg, mandrel, umbrella cover, and interface). accurate. For composite insulators that are not subject to maintenance or are installed in harsh environments due to installation environment restrictions, they should have stronger electrical insulation. Insulation properties (such as high temporary and transient overpressure) and high levels of overall mechanical properties. In this case, the supplier should be mechanically Can negotiate with electrical performance to determine a reasonable safety factor. 4.2 Working conditions Environmental conditions such as temperature, humidity, vibration, radiation, and pollution severely affect the electrical and mechanical properties of the insulator. Should consider the material of the umbrella cover, the boundary The aging of the face and the mandrel exposed to the environment, as well as the corrosion of the end attachments. If the insulator is used in a low temperature environment, the umbrella cover should also be considered. Brittleness of materials and interfaces. Note. Elastic loss occurs when the temperature is lower than the crystallization temperature or glass transition temperature of the jacket material. But if the temperature rises, the change is reversible. See the GB/T 22079-2008 for the environmental conditions of the insulator during normal operation. See the contamination level of the outdoor mounted insulator. GB/T 26218.1-2010. The supply voltage and frequency should be in accordance with GB/T 1402-2010. Standard supply voltage value (relative to ground voltage), ground power supply system nominal power The insulation voltage of the voltage and the equipment line connected to it shall be designed in accordance with the requirements of Table 1 of GB/T 1402-2010. The user shall provide information on the rail transit electric traction power supply system (including operational requirements) that may affect the insulator design. Note. See Appendix A for user requirements. The rated impulse voltage of the line provided by the electric traction contact net is shown in Table A.2 of GB/T 32350.1-2015. Overhead line can be seen inside In one case of control, the rated insulation rating is determined by statistics and risk. Therefore, the rated impulse voltage level should be selected GB/T 32350.1- The value of Table A.2 in.2015, but not related to the insulation voltage and overvoltage level consistency in this table. Table A.3 of GB/T 32350.1-2015 gives the minimum electrical clearance in air based on the rated impulse voltage, the minimum electrical room. The gap is defined based on the worst dielectric conditions of the electrode. Because the overhead lines have different conditions of use, the requirements for electrical clearance are also different. Specifically see GB/T 32578. 4.3 Electrical performance The lightning impulse withstand voltage of composite insulators shall not be lower than the rated impulse voltage specified in GB/T 32350.1-2015, and its wet work The frequency withstand voltage should not be lower than the short-duration power frequency withstand voltage specified in GB/T 32350.1-2015. 4.4 Creepage distance The electrical characteristics of the insulator are determined by the creepage distance, the dry arc distance, and the geometry of the shed. The uniform creepage ratio should be based on the system The maximum continuous voltage, insulation and contamination conditions are determined. In order to ensure the service life of the material, the manufacturer should appropriately increase the creepage distance. The shape and size of the insulator is determined by the space requirements, mechanical and electrical performance requirements imposed by the user, and the compatibility of the existing equipment. The manufacturer can specify the geometry of the shed. The brakes of diesel locomotives operating under electrified lines can emit oil and carbon-containing deposits, which can cause contamination of the insulators. Should pass Measures such as parking position of the locomotive are specified to ensure that the combustion effluent does not contact the insulator. Insulators installed under bridges and in tunnels lack natural washing of rainwater, and contaminant accumulation can occur. Under such environmental conditions When using the insulator for creepage distance and structural design, the influence of environmental conditions and the performance of the material of the umbrella cover should be considered. If insulated The child is in contact with the pantograph slide and the design should also reserve a larger creepage distance to accommodate the width of the pantograph (see 4.10). Environmental conditions, pollution levels and uniform creepage ratio requirements are given in GB/T 26218.1-2010. The uniform creepage ratio should meet the following requirements. ---Normal working conditions. 24mm/kV~33mm/kV; --- Abnormal working conditions. 36mm/kV ~ 40mm/kV; --- Harsh working conditions. >48mm/kV. Note 1. Normal operating conditions are low industrial pollution, low pollution density and no high temperature engine. Note 2. Unusual working conditions are high industrial pollution, industrial waste gas, high pollution density, mixed railway, road traffic and frequent fog. Note 3. Harsh working conditions are close to a large number of electrical workshops, chemical industry and melting workshops that frequently fog near the sea. Note 4. Clearance and creepage distance may be negotiated by both the supplier and the purchaser or appropriately reduced in the product standard. The material and structure of the composite insulator are in some respects more advantageous than porcelain insulators and glass insulators. Compared to having the same creepage distance Isolated porcelain or glass insulators, composite insulators due to the use of hydrophobic migration materials (HTM), more resistant to dirt, in achieving the same pollution resistance In the case of force or flashover, the creepage distance of the composite insulator can be smaller. But compared to traditional insulating materials, polymer materials are more susceptible to rings. The environment is affected by aging, and under certain conditions, the environment, electric field and arcing may reduce the stain resistance or service life of the composite insulator. See the 9.4 of GB/T 26218.1-2010 for the relationship between creepage distance and insulator length. See the reduction of creepage distance of polymer umbrella cover material. 5.2 in GB/T 26218.3-2011. Under the same environmental conditions, the uniform creepage ratio of the composite insulator used in the DC system is higher than that of the AC system. 4.5 Mechanical performance requirements The load specified by the manufacturer shall meet the mechanical performance requirements of Table 1. Table 1 Mechanical properties related to composite insulators Insulator type mechanical property definition Mainly subjected to tensile load rated mechanical load (SML)/factory inspection load (RTL) See IEC 61109.2008 Mainly subjected to bending load Rated bending load (SCL)/maximum design bending load (MDCL)/rated tensile load (STL)/factory inspection load (RTL) See IEC 61952.2008 The maximum working load (static and dynamic) of all tests shall be below the breaking load limit of the composite insulator. Rated mechanical load (SML) is at least 2.5 times the maximum working load to ensure adequate safety between the composite insulator breaking load limit and operating load Margin. The calculation of the load and safety factor is given in IEC 60826 and GB/T 32578. Note. MDCL can be adjusted according to any angle deformation or bending deformation requirements required by the user. 4.6 Corrosive Measures should be taken to protect the composite insulator end attachments from corrosion and to avoid electrochemical effects on the contact surfaces. Care should be taken to provide reliable sealing protection for the composite insulator end connection surface to avoid water vapor intrusion, temperature change or unidirectional current conduction. Chemical action or degradation. 4.7 Combustion safety Composite insulators should not exhibit continuous spontaneous combustion. For example, continuous spontaneous combustion should not occur during power frequency arc test. Storage, maintenance, creepage The off-voltage and voltage overload protection should be chosen to minimize the spark generated by the power frequency arc. When insulators are used in special environments or facilities, especially in tunnels and around stations, they should have reliable fire safety performance, and Provision is made for the flammability, smoke emission and toxicity of the material. The flammability test is used to verify the performance of the envelope material in terms of ignition, flame propagation and self-extinguishing. See the test of Chapter 5 for the combustion performance requirements. Test request. The smoke emission test is used to verify the opacity of smoke emission when the insulator material is burned. The toxicity test is used to confirm the smoke toxicity of the smoke emitted by the insulator material. 4.8 tracking and erosion Insulators may cause surface damage due to surface leakage currents and local arcing under harsh environmental conditions. Should choose GB/T 22079- The scratch and erosion test specified in.2008 is used as a screening test to eliminate materials or designs that are not suitable. Note 1. For supplementary information, see Appendix C of GB/T 22079-2008 and CIGRE Technical Manual 142 “Spontaneous Combustion and Artificial Aging and Pollution of Polymer Insulators” 秽 test, 07,.1999. Note 2. The representativeness, repeatability and reproducibility review of the aging test is under consideration and will be specified in the new technical report (developed by IEC /TC36). with The type of test and test parameters should be clarified. 4.9 Arc protection The thermal effects of power frequency arcs should be considered in the design of metal accessories. The damage of metal accessories is mainly caused by the magnitude of the short-circuit current of the circuit and The duration is caused by the proper arc protection device design. There is no uniform requirement for power frequency arc testing of suspension/tensile and column insulators. Because of the many test parameters of the power frequency arc test and In connection with the test arrangement, the support body and the arc protection device, the power frequency arc test can be determined by both the supplier and the buyer. GB/T 25084-2010 gives test equipment and test for AC power frequency arc test under continuous arc condition of insulator method. Segmented insulators and complete insulation components that are often subjected to power frequency arcs shall be subjected to a power frequency arc test (see 4.10). 4.10 Segmented Insulator In the rail transit overhead contact network, an air gap or insulator is provided on the contact line for pulling the pantograph to achieve electrical segmentation. many A composite insulator can be used for the segmented insulator to reduce the impact and damage to the pantograph. In the overhead contact network, the creepage distance of the insulator in contact with the traction pantograph is higher. The creepage distance depends on the pantograph width. Degree, supply voltage and operating speed. When the creepage distance requirement of the insulator exceeds the provisions of this standard, it can be determined by both parties. If the surface of the insulator is coated and no dirt builds up, the contamination test may not be performed. If the surface of the insulator is not coated, it is charged Repeated friction of the bow creates a buildup of contaminants that will cause flashover or reduced surface properties and should be tested for contamination. Insulator design, development dimension The above principles should be met when maintaining care instructions and determining the life cycle. Segmented insulators and complete insulation components that often withstand power frequency arcs shall be in accordance with Chapter 8 of GB/T 25084-2010 or The GB/T 32578 field test stipulates that the power frequency arc test is carried out, and the discharge angle gap can be used to eliminate the insulator power frequency arc. The test shall be in accordance with the provisions of Chapter 5.

5 test

5.1 General For the test of suspension/tensile composite insulators, see IEC 61109.2008. For the test of line-column composite insulators, see IEC 61952.2008. The test conditions of the insulator under special working conditions are determined by the supplier and the buyer. 5.2 Design test Through the design test of composite insulators, the suitability of the manufacturer's design, materials and manufacturing methods (processes) can be determined. The manufacturer may conduct design tests on the same type of compos...

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