TB/T 3111-2017 PDF EnglishUS$170.00 · In stock · Download in 9 seconds
TB/T 3111-2017: Copper and Copper Alloy Stranded Conductors for Electric Railway Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid TB/T 3111: Historical versions
Similar standardsTB/T 3111-2017: Copper and Copper Alloy Stranded Conductors for Electric Railway---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/TBT3111-2017RAILWAY INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 29.280 S 82 Replacing TB/T 3111-2005 Copper and Copper Alloy Stranded Conductors for Electric Railway ISSUED ON: OCTOBER 12, 2017 IMPLEMENTED ON: MAY 1, 2018 Issued by: National Railway Administration of the People’s Republic of China Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 5 4 Product Classification ... 6 5 Materials ... 8 6 Technical Requirements ... 9 7 Inspection Methods ... 16 8 Inspection Rules and Result Determination ... 20 9 Packaging and Marking ... 22 10 Storage and Transportation ... 23 Appendix A (informative) Calculated Value of Unit Mass and Nominal Value of Pulling Force of Stranded Conductor ... 24 Bibliography ... 26 Copper and Copper Alloy Stranded Conductors for Electric Railway1 ScopeThis Standard stipulates the terms and definitions, product classification, materials, technical requirements, test methods, inspection rules, packaging, marking, storage and transportation of circular concentric-lay-stranded conductor, multiple stranded copper and copper alloy stranded conductor for electric railway (hereinafter referred to as stranded conductor). This Standard is applicable to various models and specifications of copper and copper alloy stranded conductors for the overhead contact system in the field of electric railway. Copper and copper alloy stranded conductors for the overhead contact system in the field of urban railway system, and industrial and mining enterprises may also take this Standard as a reference.2 Normative ReferencesThe following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 467-2010 Copper Cathode3 Terms and DefinitionsThe following terms and definitions are applicable to this document. 3.1 Stranded Conductor Stranded conductor refers to a kind of material, which is used to transmit current and (or) bear certain tension. Stranded conductor is made by stranding multiple single conducting wires or strands. 3.2 Concentric-lay-stranded Conductor Concentric-lay-stranded conductor is a conductor constituted by spirally stranding one lay or multiple lays of single conducting wire around a center line. It is also known as concentric-lay-stranded wire. In the adjacent lay, the direction of lay is opposite. 3.3 Multiple Stranded Conductor Multiple stranded conductor refers to a conductor, which is formed by the stranding of several wire sets through one or multiple spiral lays. In each wire set, single conducting wire may be bunched or stranded. 3.4 Direction of Lay Direction of lay refers to the stranding direction of one lay of single conducting wire or strand. In other words, it refers to the direction of movement after leaving the observer. 3.5 Length of Lay Length of lay refers to the axial length of a whole spiral formed by one single conducting wire or strand in stranded conductor. 3.6 Lay Ratio Lay ratio refers to the ratio of the length of lay of a single conducting wire or strand in stranded conductor to the external diameter of the lay. 3.7 Single Conducting Wire Single conducting wire refers to drawn metal wire which has a stipulated circular cross- section. 3.8 Concentric Strand Concentric strand refers to an element in multiple stranded conductor. Each element is constituted of a set of concentrically stranded single conducting wires. 3.9 Bunched Strand Bunched strand refers to an element in multiple stranded conductor. Single conducting wires of each element are spirally stranded together in the same direction and the same length of lay. However, stratification is not required here.4 Product Classification4.1 Classification and Model Copper and copper alloy stranded conductors shall be classified in accordance with the category of copper and its alloy elements, and tensile strength rating. Each category can also be divided into different specifications in accordance with the cross- sectional area. Product model shall be expressed in the following form. In accordance with GB/T 4909.2, adopt the test method of paper tape to measure the length of lay of the stranded conductor, then, calculate the lay ratio of the stranded conductor. 7.3 Measurement of Diameter of Single Conducting Wire Since single conducting wire is already deformed after the stranding, a blade-type micrometer shall be used, or, a slice (thickness: 1 mm) shall be put on a universal microscope to measure its diameter. In addition, in the same cross-section, measure two mutually vertical values; take the average value. 7.4 Pulling Force of Stranded Conductor, Pulling Force Test after Vibration Test and Fatigue Test 7.4.1 In accordance with TB/T 2074, on both ends of a stranded conductor with the gauge length of 5 m, respectively crimp it with 200 mm seamless steel pipe. Then, clamp the sample on a horizontal tension machine, at the rate of not more than 20 mm/min, uniformly load it. When a single conducting wire ruptures, or, completely breaks off, stop the loading; record the maximum force value. If the sample ruptures inside the crimped pipe, or, at a distance of less than 20 mm from the pipe mouth, and the test force value is less than the value stipulated in the Standard, then, the test shall be invalid. The test shall be re-conducted. 7.4.2 Use terminal anchor clamp for the pulling force test of stranded conductor. 7.5 DC Resistance, Electrical Resistivity and Electrical Conductivity Test In accordance with GB/T 3048.2, adopt double-arm bridge and four-terminal method for measurement. Before the measurement, place the sample in a thermostatic chamber at 20 °C ± 0.5 °C for 24 h. Install the sample on the fixture. Measure DC resistance of the stranded conductor: impose 8 A of current. Measure electrical resistivity or electrical conductivity of single conducting wire: impose 4 A of current. During the measurement, in order to eliminate the influence of thermoelectric potential, adopt the method of reversing the positive and negative electrode of current, and taking the average value. If there is stain or rust on the surface of the sample, use alcohol cotton or fine sandpaper to get rid of it, then, conduct the measurement. If the ambient temperature does not satisfy 20 °C ± 0.5 °C (however, the ambient temperature still needs to be controlled within the range of 20 °C ± 5 °C), in accordance with the temperature coefficient of resistance, convert it to the resistance, electrical resistivity and electrical conductivity at 20 °C. Temperature coefficient of resistance is shown in Table 3. 7.6 Tensile Strength Test and Elongation Rate Measurement after Stranding of Single Conducting Wire The gauge length of the sample shall be 250 mm. Firstly, measure the diameter of the the stranded conductor; impose the test current. In every 30 min, measure the temperature once. When the difference between the temperature measured in 3 consecutive times and the maximum allowable operating temperature T is not more than 1 °C, at this moment, the current value is the continuous current carrying capacity Is under the ambient temperature. When the temperature measured on the stranded conductor is largely different from the maximum allowable operating temperature T, decrease the temperature to the room temperature, adjust the current, then, re- conduct the test. 20 min overload current carrying capacity I20: firstly, impose 60% of continuous current carrying value on the sample. After 0.5 h, in accordance with around 1.13 times of continuous current carrying capacity, impose overload current. After 20 min, and the temperature reaches the same maximum allowable operating temperature T, at this moment, the current value shall be 20 min overload current carrying capacity I20s under the ambient temperature. When the temperature measured on the stranded conductor is largely different from the maximum allowable operating temperature T, decrease the temperature to the room temperature, adjust the current, then, re-conduct the test. Convert the measurement result into corresponding value I under the ambient temperature of 40 °C. The conversion shall comply with Formula (2) ~ (4). Where, I---continuous current carrying capacity under the ambient temperature of 40 °C; Is---continuous current carrying capacity measured under the room temperature T0; k---temperature conversion factor. Where, I20---overload current carrying capacity under the ambient temperature of 40 °C; I20s---overload current carrying capacity measured under the room temperature T0. Where, T---maximum allowable operating temperature; b) After official production, when there are relatively significant changes in structure, materials and process that might affect product performance; c) When production has been suspended for over 1 year, and then, resumed; d) When the exit-factory inspection result is largely different from the previous type inspection. Exit-factory inspection: inspection of all the products. 8.3 Determination of Inspection Result Type-A disqualified item determination group count: [0,1]; Type-B disqualified item determination group count: [3,4]; Based on the respective determination of Type-A and Type-B, conduct comprehensive determination; determination plan is: [0,1].9 Packaging and Marking9.1 Packaging 9.1.1 Packaging requirements Coiled stranded conductors shall be externally coated with moisture-proof, corrosion- proof and water-proof materials. Then, use hard materials to firmly pack the products. The packing shall be able to endure collisions that might emerge in normal hoisting and transportation. In terms of stranded conductors, whose nominal cross-sectional area is 50 mm2 and above, one reel is merely allowed to coil one stranded conductor, unless it is otherwise indicated in the contract. In terms of stranded conductors, whose nominal cross-sectional area is 35 mm2 and below, one reel is merely allowed to coil one stranded conductor; when there are more than 1 stranded conductors, the number of stranded conductors and the length of each stranded conductor shall be obviously marked outside the reel; a detailed statement shall be provided in the delivery document. 9.1.2 Accompanying documents ---product certificate; ---Exit-factory inspection report. The above documents shall indicate: exit-factory No., date of production, model No., serial No. of this Standard, length (when there are more than 1 stranded conductors, indicate in accordance with the requirements in 9.1.1), net weight and anchor segment No. (if it is requested in the contract) of this reel of products. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of TB/T 3111-2017 be delivered?Answer: The full copy PDF of English version of TB/T 3111-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of TB/T 3111-2017_English with my colleagues?Answer: Yes. The purchased PDF of TB/T 3111-2017_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- TB/T 3111-2017 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version TB/T 3111-2017?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version TB/T 3111-2017 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of TB/T 3111-2017?A step-by-step guide to download PDF of TB/T 3111-2017_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "TB/T 3111-2017". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
