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Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GBZ20833.5-2023: Rotating electrical machines - The winding insulation - Part 5: Off-line measurement of partial discharge inception voltage under repetitive impulse voltage Status: Valid
Basic dataStandard ID: GB/Z 20833.5-2023 (GB/Z20833.5-2023)Description (Translated English): Rotating electrical machines - The winding insulation - Part 5: Off-line measurement of partial discharge inception voltage under repetitive impulse voltage Sector / Industry: National Standard Classification of Chinese Standard: K20 Classification of International Standard: 29.160.01 Word Count Estimation: 39,393 Date of Issue: 2023-09-07 Date of Implementation: 2024-04-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GBZ20833.5-2023: Rotating electrical machines - The winding insulation - Part 5: Off-line measurement of partial discharge inception voltage under repetitive impulse voltage---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. GB /Z 20833.5-2023.Rotating electrical machine winding insulation Part 5.Offline measurement of partial discharge onset voltage under repeated impulse voltages ICS 29.160.01 CCSK20 National Standardization Guiding Technical Documents of the People's Republic of China Insulation of rotating electrical machine windings Part 5.Repeated shocks Offline measurement of partial discharge onset voltage under voltage Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface V Introduction VI 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Repeated impulse voltage for PD measurements4 4.1 Overview 4 4.2 Single impulse voltage waveform 4 4.3 Single impulse voltage queue 9 4.4 Step-by-step voltage boosting and step-by-step voltage reduction of single impulse voltage queue10 4.5 Distribution of impulse voltage inside rotating motor 13 5 PD measurement method under impulse voltage 14 5.1 Overview 14 5.2 Electrical PD measurement 14 5.3 PD detection threshold level 16 5.4 Impact generator and computer measurement system 17 5.5 Calculation and interpretation of RPDIV and RPDEV 17 6 PD test procedures under impact 18 6.1 Test sample 18 6.2 Safety and environment during PD testing 21 6.3 Test procedures and reports 21 Appendix A (informative) Typical PD measurements on complete windings 23 Appendix B (informative) Example 24 of PD data analysis using phase angle Appendix C (informative) Complete winding connection example 26 Appendix D (informative) Example 30 of SBS boost mode under repeated impact Reference 31 Figure 1 Measurement loop block diagram of RPDIV and RPDEV 4 Figure 2 Simplified impulse generator (IG) circuit with a single switch5 Figure 3 Single switch impulse generator IG open circuit end output voltage 5 Figure 4 Two impulse waveforms at the IG open-circuit end of a single-switch impulse generator 5 Figure 5 Simplified IG circuit of four-arm (switch) bridge circuit 6 Figure 6 Output voltage 6 at the open end of the four-arm bridge loop Figure 7 The rise time of triangular wave impulse increases and the peak voltage decreases7 Figure 8 Increased rise time and decreased peak voltage of square wave impulse7 Figure 9 Peak overshoot and rapid oscillation of triangular wave shock7 Figure 10 Peak overshoot and rapid oscillation of square wave shock8 Figure 11 Typical “ringing” observed during bipolar square wave voltage testing 8 Figure 12 Triangular wave impact slow oscillation attenuation 8 Figure 13 Slow oscillation attenuation of square wave impact 9 Figure 14 Schematic diagram of positive unipolar shock queue parameters 9 Figure 15 Bipolar impact queue parameter diagram 10 Figure 16 Positive unipolar impact SBS parameters 10 Figure 17 Measuring the positive unipolar impulse SBS voltage of RPDIV and RPDEV11 Figure 18 Bipolar SBS voltage diagram with positive unipolar impulse distortion11 Figure 19 SBS voltage increase for bipolar shock 11 Figure 20 Representative scheme of conditioning procedure before RPDIV measurement12 Figure 21 Schematic diagram of phase-to-phase, ground-to-ground and inter-turn voltages of rotating motor windings powered by two-level frequency converters13 Figure 22 Coupling capacitor 14 with multi-order analog filter Figure 23 Examples of impulse voltage and PD pulse spectrum before filtering (left) and after filtering (right) 15 Figure 24 HFCT with multi-order analog filter connected between power supply and test object15 Figure 25 HFCT with multi-order analog filter connected between power supply and ground15 Figure 26 Circuit 16 using an electromagnetic coupler (such as an antenna) to suppress test power surges Figure 27 Loop 16 using electromagnetic UHF antenna Figure 28 Noise, interference and threshold diagram 17 Figure 29 Example of PD measurement using PC Figure 17 Figure 30 Example of RPDIV and RPDEV calculation for repetitive pulse voltage using 50% PD probability18 Figure 31 Three-terminal and four-terminal motor voltage terminal diagram 19 Figure A.1 Block diagram of PD measurement system in RRT 23 Figure A.2 Illustration of impulse and PD starting voltage pulse in RRT23 Figure B.1 Example of PD phase diagram in sinusoidal voltage mode 24 Figure B.2 Sinusoidal PWM voltage mode PD phase diagram example 24 Figure B.3 Square wave PWM voltage mode PD phase diagram example (PRPD mode) 25 Figure C.1 Connection of six-terminal motor 26 Figure C.2 Connection of three-terminal or four-terminal motor (with N terminal) 26 Figure C.3 Three-terminal motor connection, type a (Table 2) 27 Figure C.4 Three-terminal motor connection, type b (Table 2) 27 Figure C.5 Three-terminal motor connection, type c (Table 2) 27 Figure C.6 Three-terminal motor connection, type d (Table 2) 27 Figure C.7 Three-terminal motor connection, type e (Table 2) 28 Figure C.8 Three-terminal motor connection, type f (Table 2) 28 Figure C.9 Four-terminal motor with N terminal grounded - connection type (Table 3) 29 Figure D.1 The SBS voltage of the unipolar shock alternating queue increases by 30 Table 1 Typical range of test product terminal impulse voltage parameters to be reported12 Table 2 Three-terminal motor complete winding connections 20 Table 3 Four-terminal motor complete winding connections 20 Table A.1 Parameters used in RRT23ForewordThis 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 is Part 5 of GB/T (Z) 20833 "Rotating Electric Machine Winding Insulation". GB/T (Z)20833 has issued the following part. ---Part 1.Offline partial discharge measurement (GB/T 20833.1); ---Part 2.Online partial discharge measurement (GB/T 20833.2); ---Part 3.Dielectric loss factor measurement (GB/T 20833.3); ---Part 4.Insulation resistance and polarization index measurement (GB/T 20833.4); ---Part 5.Offline measurement of partial discharge onset voltage under repeated impulse voltages (GB /Z 20833.5). This document is equivalent to IEC TS60034-27-5.2021 "Rotating electrical machines Part 27-5.Partial discharge initiation under repeated impulse voltages" "Offline Measurement of Initial Voltage", the file type was adjusted from IEC technical specifications to my country's guiding technical documents. This document has made the following minimal editorial changes. ---In order to coordinate with the existing standards, the name of the standard is changed to "Insulation of rotating electrical machine windings - Part 5.Partial stress under repeated impulse voltages" Offline measurement of discharge onset voltage. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Rotating Electrical Machines Standardization Technical Committee (SAC/TC26). This document was drafted by. Shanghai Motor System Energy Saving Engineering Technology Research Center Co., Ltd., CRRC Yongji Electric Co., Ltd., SEW- Electric Motor (Suzhou) Co., Ltd., Suzhou Jufeng Electrical Insulation System Co., Ltd., Shandong Huali Motor Group Co., Ltd., Wolong Electric Pneumatic Drive Group Co., Ltd., Jiangsu Datong Mechanical and Electrical Co., Ltd., Jiangsu Shangqi Group Co., Ltd., Ruichang Senaoda Technology Co., Ltd. Company, China Datang Group General Institute of Science and Technology Co., Ltd. North China Electric Power Testing Research Institute, Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd. Division, Anhui Weineng Motor Co., Ltd., Dalian Yulin Motor Co., Ltd., Dongfang Electric Group Dongfang Motor Co., Ltd., Nanyang Explosion-proof (Suzhou) Special Equipment Co., Ltd., Siemens Electric Motors (China) Co., Ltd., Shanghai McQueen Control System Co., Ltd., Shanghai Nuobaichuan New Energy Technology Ltd. The main drafters of this document. Liu Rui, Zhang Shengde, Zheng Ruijuan, Zhang Yunzhe, Zhou Cheng, Yin Zhihua, Xu Pengtao, Xiao Xianxiong, Yin Guangyu, Wang Xianchang, Zhang Xingbin, Tong Anni, Jiang Danfeng.IntroductionIn recent years, with the development of power electronics technology, various power transmission systems (PDS) of variable frequency speed-regulated motors have emerged. IEC TS60034-25[1] introduces the new impact of PDS on rotating electrical machines. The document states that due to the rapid duplication of power devices in PDS Switching, the electrical insulation of the motor windings will be affected by high-frequency surge voltages. The severity of the shock depends on the frequency converter and motor ratings values, converter topology, cable length between motor and converter, filtering, etc. IEC 60034-18-41[2] was released in.2014 and is the first to describe Type I (without partial localization) used in inverter-powered rotating electrical machines. International standard for design qualification and type testing of electrical) insulation systems. In this document, the use of power frequency or impulse power sources for two types of partial discharges is required. Electrical (PD) test. For partial discharge measurements under impact, IEC 60034-18-41 refers to IEC TS61934, which provides the usual technical Technical explanation and several partial discharge measurement methods. For practical testing guidance on the insulation of rotating electrical machine windings, this document is provided as a repeatable shock bar It is compiled by offline measurement of partial discharge onset voltage RPDIV and extinction voltage RPDEV under the condition. GB/T (Z) 20833 provides functional evaluation and special test procedures for the insulation of rotating electrical machine windings, and is intended to be composed of 5 parts. ---Part 1.Offline partial discharge measurements. The purpose is to specify a general basis for offline partial discharge measurements on the insulation of rotating electrical machine windings. basic specifications. Including. measurement methods and instruments, test loop layout, standardization of test procedures, noise reduction, test results Document preparation and evaluation of test results. ---Part 2.Online partial discharge measurement. The purpose is to stipulate the rated voltage of 3kV and above, no frequency converter power supply rotating power Online measurement of partial discharge of machine stator winding insulation, including. measurement technology and instruments, test circuit layout, standardization and sensitivity Assessment, measurement procedures, noise reduction, documentation of test results, evaluation of test results. ---Part 3.Dielectric loss factor measurement. The purpose is to establish that under power frequency AC voltage, the rated voltage is 6kV and above. Necessary conditions for dielectric loss factor measurement of the single formed stator bar and coil of the motor. ---Part 4.Insulation resistance and polarization index measurement. The purpose is to stipulate that it is applicable to low-voltage, Minimum recommended values for insulation resistance and polarization index of windings of high-voltage AC and DC rotating electrical machines. ---Part 5.Offline measurement of partial discharge onset voltage under repeated impulse voltages. The purpose is to stipulate that it is suitable for voltage type frequency conversion Off-line measurement method of partial discharge onset and extinction voltages of winding insulation of rotating electrical machines powered by a device under repeated impulse voltages. Insulation of rotating electrical machine windings Part 5.Repeated shocks Offline measurement of partial discharge onset voltage under voltage1 ScopeThis document specifies the offline measurement method of partial discharge onset and extinction voltage of winding insulation under repeated impulse voltages. This document applies to rotating electrical machines powered by voltage-type frequency converters.2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 23642-2017 Partial discharge (PD) voltage of electrical insulating materials and systems under conditions of instantaneous rise and repeated voltage surges Gas measurement (IEC TS61934.2011, IDT) Note. GB/T 20833.1-2021 Rotating electrical machine winding insulation Part 1.Offline partial discharge measurement (IEC 60034-27-1.2017, IDT) IEC TS61934 Electrical testing of partial discharge (PD) on electrical insulating materials and systems under conditions of transient rise and repeated voltage surges Note. GB/T 42287-2022 High voltage test technology electromagnetic and acoustic method for measuring partial discharge (IEC TS62478.2016, IDT)3 Terms and definitionsThe terms and definitions defined in IEC 60034-27-1, IEC TS61934 and the following apply to this document. ISO and IEC maintain terminology databases used for standardization at. 3.1 Partial discharge partialdischarge; PD An electrical discharge in which the insulation between conductors is only partially bridged. Such discharges may or may not occur near conductors. 3.2 Use the step-by-step voltage boosting method to apply the impulse voltage to the test sample until more than five local impulse voltages with the same peak-to-peak value appear in ten times. Minimum peak-to-peak impulse voltage of discharge pulse. Note. For the specified test time and test circuit layout, this value is the average value, and the voltage applied to the test sample adopts the step-by-step voltage boosting method. See 5.5 for details. 3.3 From the higher voltage value where the discharge is observed, the impulse voltage is applied to the test sample using the step-by-step voltage reduction method until ten peak-to-peak impulses occur. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GBZ20833.5-2023_English be delivered?Answer: Upon your order, we will start to translate GBZ20833.5-2023_English as soon as possible, and keep you informed of the progress. 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