GB/T 22719.2-2008 PDF EnglishUS$85.00 · In stock · Download in 9 seconds
GB/T 22719.2-2008: Interturn insulation of random-wound winding for AC low-voltage electrical machines -- Part 2: Test limits Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 22719.2-2008: Interturn insulation of random-wound winding for AC low-voltage electrical machines -- Part 2: Test limits---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/GBT22719.2-2008 ICS 29.160.01 K 20 NATIONAL STANDARD Interturn insulation of random-wound winding for AC low-voltage electrical machines - Part 2.Test limits Issued on. DECEMBER 30, 2008 Implemented on. OCTOBER 01, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China; Standardization Administration of the People’s Republic of China Table of ContentsForeword... 3 1 Scope... 4 2 Normative References... 4 3 Terms and Definitions... 4 4 Test Parameters... 5 5 Comparison Parameters... 8 Annex A (Informative) The Allowable Value of the Test Waveforms Difference Quantity and Settings... 9ForewordGB/T 22719 Interturn insulation of random-wound winding for AC low-voltage electrical machines consists of following two parts. — Part 1.Test methods; — Part 2.Test limits. This is Part 2 of GB/T 22719. Annex A of this Part is informative. This Standard was proposed by China Electrical Equipment Industry Association (CIBB). This Standard shall be under the jurisdiction of National Technical Committee (SAC/TC 26) on Electric Rotating Machinery of Standardization Administration of China. The responsible drafting organizations are Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd, Shanghai Electrical Apparatus Co., Ltd, Shanghai Sea Eagle Electromechanical Test Equipment Factory, Jiangmen Sincere Reduction Gear Factory Co., Ltd, Zhejiang Jinlong Electrical Machinery Stock Co., Ltd, Suzhou Jufeng Insulating Material Co., Ltd, and Shanghai Shenfa Detecting Instrument Factory. This Participating drafting organizations are Guilin Electrical Science Research Institute, and Harbin Electric Machinery AC-DC Motor Co., Ltd. The chief drafting staffs of this standard include Zhang Shengde, Li Jinliang, Rong Weikang, Zhang Fei, Wu Yaqi, Liu Quan, Ye Ye, Xu Weihong, Xu Baodi, Yu Longying, and Fang Jianguo. This Part is issued for the first time. GB/T 22719.2--2008 Interturn insulation of random-wound winding for AC low-voltage electrical machines - Part 2.Test limits1 ScopeThis Part of GB/T 22719 specifies the interturn insulation test of random-wound winding for AC electrical machines - test parameters, test limits and the allowable value of the test waveforms difference quantity when doing the automatic test discrimination. This Part applies to random-wound winding interturn insulation test for the 3-phase or single- phase AC electrical machines of which the nominal voltage is no more than 1140V.2 Normative ReferencesThe articles contained in the following documents have become part of this Part of GB/T 22719 when they are quoted herein. For the dated documents so quoted, all the modifications (excluding corrections) or revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted, the latest editions shall be applicable to this Standard. GB 755-2008 Rotating electrical machines - Rating and performance (IEC 60034-1.2004, IDT) GB/T 8170-1987 Rules for rounding off of numeric values JB/T 9615.1-2000 Test methods of the interturn insulation on random wound winding for AC low-voltage machines3 Terms and DefinitionsFor the purpose of this Part, the following terms and definitions apply. 3.1 Comparison parameter The parameters used for comparing the test waveforms difference quantity in the impulse waveform comparison method. 3.2 Waveform area difference The difference of the areas (see figure 1) covered by the two test waveform curves and their corresponding x-coordinate (t) in the tested windings (or coils) or the reference windings (or coils), at any specified comparison discrimination zone.4 Test Parameters4.1 Overview The test parameters refer to the impulse test voltage peak value, wave-front time, test time, test voltage input direction, number of tests, and test energy and so on. The key test parameters refer to the impulse test voltage peak value and wave-front time. 4.2 Impulse test voltage peak value 4.2.1 Impulse test voltage peak value of motor winding interturn insulation shall not be less than the value - that is calculated by formula (1), and then it is rounded off to hundreds place (hundred volts) according to provisions of GB/T8170-1987. 4.2.3 The operating factor K2 is selected according to Table 1 - based on severities of environmental conditions of motor operating, frequency of motor startup or forward-backward turning, difficulty level of motor installation or repair, additional requirements for the motor such as reliability and safety. For other operating conditions or requirements which are not listed in Table 1 (if any), it may be selected by reference according to the specific circumstances of the products. 4.2.4 The tolerance of impulse test voltage peak value is ±5.0% or ±3.0%, ±3.0% is recommended to be adopted preferably. 4.2.5 Impulse test voltage peak value can be measured on motor winding (terminal) by choosing any of methods described below. 4.3 Wave-front Time Wave-front time of impulse test voltage is 0.2μs (tolerance is μs) and 1.2μs (tolerance is ± 30%), 0.2μs is recommended to adopt preferably. 4.4 Test Time GB/T 22719.2--2008 Impulse voltage test time of each converting wirings shall be based on that the correct judgment can be made on test waveforms. Generally, it takes 1s-3s, and the time can be shorter for the automatic test. 4.6 The Number of Tests and Process Test 4.6.1 As for the three-phase motor, according to test methods and selection principles specified in chapter 5 of JB/T9615.1-2000, any one method can be selected from phase (Ф), line (Y), and angle (△) connection methods; then it shall be carried out the impulse test according to provisions of 4.4 - each input direction of impulse test voltage.5 Comparison Parameters5.1 Overview Comparison parameters are the test waveforms amplitude value, oscillating period, waveform area difference and area of waveform difference. 5.2 Test Waveforms Amplitude Value and Oscillating Period Generally, the difference in amplitude value and oscillating period of two test waveforms are compared in manual test. 5.4 Allowable Value of the Test Waveforms Difference Quantity In automatic test discrimination, the allowable values for overall test waveforms difference quantity shall be pre-tested and calculated in accordance with provisions specified in Annex A.Annex A(Informative) The Allowable Value of the Test Waveforms Difference Quantity and Settings A.1 Sampling and Pre-Test Any 10 sets of motor windings shall be selected from the tested motors as test sample (sample size n = 10). A.2 Individual Test Waveform Difference Quantity According to the test connection method stipulated in JB/T9615.1-12000, the difference quantity X of the various test waveforms of each test individual shall be measured according to the provisions of Chapter 4. Take the maximum Xmax of the test waveform difference quantity X of each motor winding as the test waveform difference quantity Xi of that test individual. A.3 Sample Test Waveform Difference Quantity ......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 GB/T 22719.2-2008 be delivered?Answer: The full copy PDF of English version of GB/T 22719.2-2008 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 GB/T 22719.2-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 22719.2-2008_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 -- GB/T 22719.2-2008 -- 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.How to buy and download a true PDF of English version of GB/T 22719.2-2008?A step-by-step guide to download PDF of GB/T 22719.2-2008_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 "GB/T 22719.2-2008". 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 |
