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GB/T 21205-2022 English PDF

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Q: Should I purchase the latest version GB/T 21205-2022?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21205-2022 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.

US$874.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21205-2022: Rotating electrical machines - Repair, overhaul and reclamation
Status: Valid

GB/T 21205: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21205-2022	874	Add to Cart	7 days	Rotating electrical machines - Repair, overhaul and reclamation	Valid
GB/T 21205-2007	714	Add to Cart	3 days	Specification for the refurbishing of rotating electrical machines	Obsolete

Similar standards

GB/T 20834 GB/T 20833.1 GB/T 21707 GB/T 21211 GB/T 21209

Basic data

Standard ID: GB/T 21205-2022 (GB/T21205-2022)
Description (Translated English): Rotating electrical machines - Repair, overhaul and reclamation
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K20
Classification of International Standard: 29.160.01
Word Count Estimation: 48,480
Date of Issue: 2022-10-12
Date of Implementation: 2023-05-01
Older Standard (superseded by this standard): GB/T 21205-2007
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 21205-2022: Rotating electrical machines - Repair, overhaul and reclamation

---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.
Rotating electrical machines - Repair, overhaul and reclamation ICS 29.160.01 CCSK20 National Standards of People's Republic of China Replacing GB/T 21205-2007 Rotating electrical machine repair, overhaul and restoration Released on 2022-10-12 2023-05-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Basic principles 3 4.1 References 3 4.2 Hazardous areas 3 4.3 Special applications 3 4.4 Efficiency 4 4.5 System Efficiency4 4.6 Environment and end-of-life recycling4 4.7 Circular economy 4 5 General requirements for repairs 5 5.1 Overview 5 5.2 Maintenance unit 5 5.3 Scope of work6 5.4 Standard 6 5.5 Quality plan 6 5.6 User provided information 7 5.7 Required documents 7 6 The complete machine. inspection, testing and evaluation 8 6.1 External inspection 8 6.2 Test before disassembly 8 6.3 Stator winding or rotor winding test 9 6.4 Shafts and bearings 10 6.5 Rotor cage winding integrity 11 7 Disassembled motor. inspection, testing and evaluation 11 7.1 General 11 7.2 Cleaning 11 7.3 External inspection 11 7.4 Air gap 12 7.5 Ventilation 12 7.6 Stator 12 7.7 Rotor 13 7.8 Slip ring 14 7.9 Brushes and brush holders 14 7.10 Rolling bearings 15 7.11 Sliding bearings 15 7.12 Seals and labyrinth seals 15 8 Repair work16 8.1 Winding inspection 16 8.2 Core inspection 16 8.3 Rewinding 17 8.4 Part 21 8.5 Rotor 22 8.6 Axis 23 8.7 Bearings 23 8.8 Lubrication 24 8.9 Space heaters 24 8.10 Temperature sensor 24 8.11 Protection against water, dust and corrosion 24 8.12 Junction boxes and terminals 24 9 Final Test 24 9.1 Test equipment 24 9.2 Insulation resistance 25 9.3 Winding resistance 25 9.4 No-load test 25 9.5 Marking of magnetic center (according to negotiation) 26 9.6 Blockage test (if applicable) 26 9.7 Motor full-load running test 26 9.8 Heating test with full current at zero power factor (according to negotiation) 26 9.9 Electromagnetic compatibility (according to agreement) 26 9.10 Auxiliary equipment 26 9.11 Salient pole DC or AC voltage drop test 26 10 Additional requirements for DC motors 26 10.1 Overview 26 10.2 The complete machine. inspection, testing and evaluation 26 10.3 Disassembled motor. inspection, testing and evaluation 27 10.4 Repair work 28 10.5 DC Motor Final Test 30 11 Additional requirements for high-voltage AC motors (according to negotiation) 30 11.1 Inspection and testing of the complete machine 30 11.2 Disassembled high voltage motor, inspection and test 31 11.3 High voltage motors. final test 31 12 Additional tests for high voltage generators 32 12.1 Stator winding crack corrosion 32 12.2 Solid Cylindrical Rotor 32 12.3 Cooling circuit (hydrogen/water) 32 13 Client reporting and handover 32 13.1 Exterior finishes 32 13.2 Shipping and packaging 32 13.3 Reports to users 33 Appendix A (Informative) Repair, Overhaul, Restoration Flowchart 34 Appendix B (Informative) Standard Extract and Tolerance Table 35 Reference 39 Figure 1 Motor assembly 5 Figure A.1 Repair, overhaul, repair flow chart 34 Table 1 Referring to IEC 60034-27-4, the minimum recommended value of insulation resistance at a reference temperature of 40°C9 Table 2 Guidelines for DC voltage for insulation resistance and PI tests10 Table 3 Voltage withstand test requirements in accordance with IEC 60034-1 18 Table 4 The simplest inspection test items specified in IEC 60034-1 Table 25 Table 5 Clearance between brush and brush holder (taken from Table 1 of IEC 60136.1986) 29 Table B.1 Reference IEC 60072-1 shaft extension and coupling 35 Table B.2 Keyway width dimensions for transitional fits (C.1.5 of IEC 60072-1.1999) 35 Table B.3 Tolerances for Shaft Runout 36 Table B.4 Installation spigot diameter tolerance table (C.1.7 of IEC 60072-1.1999) 37 Table B.5 Concentricity of the spigot diameter and the runout of the shaft extension of the mounting surface (C.7.1 of IEC 60072-1.1999) 37

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document replaces GB/T 21205-2007 "Code for Renovation of Rotating Electric Machines". Compared with GB/T 21205-2007, except for structural adjustment and In addition to editorial revisions, the main technical content changes are as follows. ---Modified the scope, adding the requirement to consider environmental factors, excluding the need to redesign and modify the performance of the motor (see Section Chapter 1, Chapter 1 of the.2007 edition); --- Added the basic principles to be followed in motor repair (see Chapter 4); --- Changed the general requirements for motor repair (see Chapter 5, Chapter 4 of the.2007 edition); --- Added inspection, testing and evaluation requirements for the whole machine (see Chapter 6); --- Added inspection, testing and evaluation requirements for disassembled motors (see Chapter 7); --- Added and changed the content of repair work (see Chapter 8, Appendix B of the.2007 edition); --- Increased and changed the final test requirements (see Chapter 9, Chapter 5 and Appendix B of the.2007 edition); --- Added additional requirements for DC motors (see Chapter 10); --- Added additional requirements for high-voltage AC motors (see Chapter 11); --- Added additional test requirements for high-voltage generators (see Chapter 12); --- Increased customer reporting and handover requirements (see Chapter 13). This document is equivalent to IEC 60034-23.2019 "Rotating electrical machines - Part 23.Repair, overhaul and restoration". The following minimal editorial changes have been made to this document. --- In order to coordinate with existing standards, change the name of the standard to "Repair, Overhaul and Restoration of Rotating Electric Machines"; ---In order to comply with the national standard writing requirements, the introductory words of some listed items are added; ---Modify the errors in the international documents, and change the footnote e that has no corresponding label in Table 3 to a note; --- In order to comply with the national standard writing requirements, 5.5 supplementary reference to Appendix A. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Standardization Technical Committee of Rotating Electric Machines (SAC/TC26). This document is drafted by. Shanghai Electric System Energy Conservation Engineering Technology Research Center Co., Ltd., Shanghai Electric Group Meishan Electric Co., Ltd. Division, Hebei New Star Electric Co., Ltd., Jiangsu Jiaxuan Intelligent Industrial Technology Co., Ltd., Zhejiang Jufeng Technology Co., Ltd., Jiamu Sri Lanka Electric Co., Ltd., Jiangsu Weiteli Motor Co., Ltd., Qingdao Zhongjiate Electric Co., Ltd., Jiangsu Xi'anda Explosion-proof Co., Ltd., CRRC Yongji Motor Co., Ltd., Hebei Xiangli Motor Manufacturing Co., Ltd., Shanghai Dianke Motor Technology Co., Ltd., Shanghai Electrical Equipment Testing Institute Co., Ltd., Anhui Weineng Motor Co., Ltd., Xiangtan Motor Co., Ltd., Nanyang Weite Explosion-proof Motor Co., Ltd. Division, Shandong Huali Motor Group Co., Ltd., Rongcheng Rongjia Power Co., Ltd., Hunan Tianneng Motor Manufacturing Co., Ltd., Kangfu Technology Co., Ltd., Jiangsu Jinding Large Motor Maintenance Co., Ltd. The main drafters of this document. Huang Lei, Tong Anni, Liu Yonghua, Li Jianjun, Fu Jie, Qiu Keke, Yao Peng, Li Rui, Zhao Bingrong, Song Chenglin, Lu Jinsheng, Zhang Peijun, Pang Zhiyong, Cao Haidong, Zhang Lei, Luan Hua, Wang Honghu. The release status of previous versions of this document and the documents it replaces. ---It was first published as GB/T 21205-2007 in.2007; --- This is the first revision. Rotating electrical machine repair, overhaul and restoration

1 Scope

This document specifies the necessary procedures for the repair, overhaul and restoration of all types and sizes of rotating electrical machines covered by the IEC 60034 series. This document establishes a common industry practice covering all aspects of complete repair of electric motors. Operating range depends on motor type, rated value, environmental conditions, and reliability and safety of the device. include. --- If necessary, determine the cause of the failure; --- Determine the scope of repair as appropriately as possible; --- If required, define the modified performance, operating requirements and environmental conditions; ---If required, review the original design and update the design specifications; ---Inspect the quality and performance of the repaired motor, maintain or improve the rated energy efficiency; ---Ensure that environmental factors are taken into account. This document does not supersede the requirements specified in IEC 60079-19, or other requirements concerning the repair or overhaul of motors used in explosive atmospheres Require. Motors for special occasions such as airtight type, submersible type, nuclear energy application type, hydrogen-cooled motor, military type, aviation motor and traction motor The technical requirements shall be negotiated between the service unit and the user. This document does not replace the original motor manufacturer's instructions and recommendations. Redesigns and performance changes that would require motor designer involvement are beyond the scope of this document.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 2900.25-2008 Electrotechnical terminology for rotating electrical machines (IEC 60050-411.1996, IDT) ISO 21940-11 Mechanical vibration rotor balancing - Part 11.Procedures and tolerances for rigid rotors (Mechanical and performance) Note. GB/T 755-2019 Rating and performance of rotating electrical machines (IEC 60034-1.2017, IDT) Note. GB/T 1993-1993 cooling method for rotating electrical machines (IEC 60034-6.1991, eqv) protection) Note. GB/T 13002-2022 Thermal protection of rotating electrical machines (IEC 60034-11.2020, IDT) Note. GB/T 32891.1-2016 Efficiency Classification of Rotating Electrical Machines (IE Code) Part 1.Mains-Powered AC Motors (IEC 60034-30-1. 2014, IDT) ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21205-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21205-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21205-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21205-2022_English will be deemed to be sold to your employer/organization who actually pays 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+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 21205-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21205-2022 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.