GB/T 22720.1-2017 PDF English
US$500.00 · In stock · Download in 9 secondsGB/T 22720.1-2017: Rotating electrical machines -- Qualification and quality control tests of partial discharge free electrical insulation systems (Type Ⅰ) used in rotating electrical machines fed from voltage converters Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 22720.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 22720.1-2017 | English | 500 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Rotating electrical machines -- Qualification and quality control tests of partial discharge free electrical insulation systems (Type Ⅰ) used in rotating electrical machines fed from voltage converters
| Valid |
| GB/T 22720.1-2008 | English | RFQ |
ASK
|
4 days
|
Rotating electrical machines -- Qualification and type tests for Type Ⅰ electrical insulation systems used in rotating electrical machines fed from voltage converters
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 22720.1-2017
GB/T 22720.1-2017: Rotating electrical machines -- Qualification and quality control tests of partial discharge free electrical insulation systems (Type Ⅰ) used in rotating electrical machines fed from voltage converters
---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/GBT22720.1-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.01
K 20
GB/T 22720.1-2017 / IEC 60034-18-41.2014
Replacing GB/T 22720.1-2008
Rotating Electrical Machines - Qualification and
Quality Control Tests of Partial Discharge Free
Electrical Insulation Systems (Type I) Used in Rotating
Electrical Machines Fed from Voltage Converters
[IEC 60034-18-41.2014, Rotating Electrical Machines - Part 18-41.
Partial Discharge Free Electrical Insulation Systems (Type I) Used in
Rotating Electrical Machines Fed from Voltage Converters -
Qualification and Quality Control Tests, IDT]
Issued on. NOVEMBER 1, 2017
Implemented on. MAY 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
Introduction... 6
1 Scope... 8
2 Normative References... 8
3 Terms and Definitions... 9
4 Motor Terminal Voltage Generated during Converter Operation... 14
5 Electrical Stresses in the Insulation System of Motor Windings... 18
6 Types of Motor Insulation... 22
7 Stress Categories for Type I Insulation Systems Used in Motors Fed from
Converters... 22
8 Qualification and Type Tests of Type I Insulation Systems... 24
9 Test Equipment... 25
10 Qualification of Type I Insulation Systems... 27
11 Type Test Procedures of Type I Insulation Systems... 32
12 Exit-factory Inspection... 34
13 Analysis, Report and Classification... 34
Appendix A (informative) Terminal Voltages of a Converter-fed Motor during
Operation... 35
Appendix B (normative) Test Voltages of Type I Insulation Systems... 38
Appendix C (normative) Derivation of Allowable Voltages in Operation... 47
Appendix NA (informative) Derivation and Example of Conventional Withstand
Voltage Test of Motors with a Rated Voltage of 500 V... 49
Bibliography... 50
Foreword
Electrical Insulation Systems Used in Rotating Electrical Machines Fed from Voltage
Converters is divided into two parts.
---GB/T 22720.1 Rotating Electrical Machines - Qualification and Quality Control
Tests of Partial Discharge Free Electrical Insulation Systems (Type I) Used in
Rotating Electrical Machines Fed from Voltage Converters;
---GB/Z 22720.2 Rotating Electrical Machines - Qualification and Acceptance
Tests for Partial Discharge Resistant Electrical Insulation Systems (Type II)
Used in Rotating Electrical Machines Fed from Voltage Converters.
This is Part 1 of Electrical Insulation Systems Used in Rotating Electrical Machines
Fed from Voltage Converters.
This Part was drafted in accordance with the rules in GB/T 1.1-2009.
This Part serves as a replacement of GB/T 22720.1-2008 Rotating Electrical Machines
- Qualification and Type Tests for Type I Electrical Insulation Systems Used in Rotating
Electrical Machines Fed from Voltage Converters. In comparison with GB/T 22720.1-
2008, the main technical changes are as follows.
---The Scope is modified (see Chapter 1; Chapter 1 of Version 2008);
---The term “Impulse Voltage Insulation Class” is added (see 3.19);
---The temperature selection for qualification test is modified (see 8.2; 8.2 of
Version 2008);
---The “pre-diagnostic test” is added (see 10.4.2);
---The procedures for the type test of Type I insulation systems are modified (see
Chapter 11; Chapter 11 of Version 2008);
---The “exit-factory test” is added (see Chapter 12);
---The “requirements for the application of impulse voltage” are added (see B.2);
---The “partial discharge test enhancement factors” are added (see B.3);
---Appendix C is added (see Appendix C);
---Appendix NA is added (see Appendix NA).
This Part uses the translation method in the identical adoption of IEC 60034-18-
41.2014 Rotating Electrical Machines - Part 18-41.Partial Discharge Free Electrical
Insulation Systems (Type I) Used in Rotating Electrical Machines Fed from Voltage
Converters - Qualification and Quality Control Tests.
The Chinese documents that have a consistent correspondence relationship with the
international documents in Normative References of this Part are as follows.
---GB/T 4074.7-2009 Winding Wires - Test Methods - Part 7.Test Procedure for
the Determination of the Temperature Index of Enameled Winding Wires (IEC
60172.1987, IDT)
---GB/T 16935.1-2008 Insulation Coordination for Equipment within Low-voltage
Systems - Part 1.Principles, Requirements and Tests (IEC 60664-1.2007, IDT)
---GB/T 17948.1-2000 Rotating Electrical Machines - Functional Evaluation of
Insulation Systems - Test Procedures for Wire-wound Windings - Thermal
Evaluation and Classification (IEC 60034-18-21.1992, IDT)
---GB/T 17948.3-2017 Rotating Electrical Machines - Functional Evaluation of
Insulation Systems - Test Procedures for Form-wound Windings - Thermal
Evaluation and Classification of Insulation Systems Used in Rotating Machines
(IEC 60034-18-31.2012, IDT)
---GB/T 20833.1-2016 Rotating Electrical Machines - The Stator Winding
Insulation of Rotating Electrical Machines - Part 1.Off-line Partial Discharge
Measurements (IEC/TS 60034-27.2006, IDT)
---GB/T 21209-2007 Guide for the Design and Performance of Cage Induction
Motors Specifically Designed for Converter Supply (IEC/TS 60034-25.2004,
IDT)
---GB/Z 22720.2-2013 Rotating Electrical Machines - Qualification and
Acceptance Tests for Partial Discharge Resistant Electrical Insulation Systems
(Type II) Used in Rotating Electrical Machines Fed from Voltage Converters
(IEC/TS 60034-18-42.2008, IDT)
---GB/T 23642-2017 Electrical Insulating Materials and Systems - Electrical
Measurement of Partial Discharges (PD) under Short Rise Time and Repetitive
Voltage Impulses (IEC/TS 61934.2011, IDT)
This Part makes the following editorial modifications.
---The title of the standard is modified;
---In accordance with the technical errata of IEC 60034-18-41.2014, “exit-factory
inspection” is added; “maximum test voltage” in Table B.5 is modified;
---Appendix NA is added.
This Part was proposed by China Electrical Equipment Industry Association.
This Part shall be under the jurisdiction of National Technical Committee 26 on Electric
Rotating Machinery of Standardization Administration of China (SAC/TC 26).
The drafting organizations of this Part. Shanghai Electrical Apparatus Research
Institute Co., Ltd.; Beijing Gold Wind Kechuang Wind Power Equipment Co., Ltd.;
Suzhou Jufeng Electrical Insulation System Co., Ltd.; CRRC Yongji Electric Co., Ltd.;
Shanghai Electric System Energy-saving Engineering Technology Research Center
Co., Ltd.; Shanghai Testing and Inspection Institute for Electrical Equipment; Lanzhou
Electric Corporation; SEW-EURODRIVE (Suzhou) Co., Ltd.; DuPont (China) R&D
Management Co., Ltd.
The main drafters of this Part. Zhang Shengde, Zhao Chao, Zhao Xiang, Zhang Xiaohe,
Xia Yu, Liu Guanfang, Chen Yerong, Huang Huijie.
The issuing of the previous version.
---GB/T 22720.1-2008.
1 Scope
This Part specifies the assessment criteria for stator / rotor winding insulation systems
fed from voltage-source pulse-width-modulation (PWM). This Part is applicable to the
stator / rotor winding insulation systems of single-phase or multi-phase AC motors
powdered by converters.
2 Normative References
The 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 17948.7-2016 Rotating Electrical Machines - Functional Evaluation of Insulation
Systems - General Guidelines (IEC 60034-18-1.2010, IDT)
3 Terms and Definitions
The following terms and definitions are applicable to this document.
Partial discharge extinction voltage refers to the voltage when the voltage applied to
the sample gradually decreases from a certain relatively high value where partial
discharge is detected to the voltage where no partial discharge can be detected in the
test circuit.
4 Motor Terminal Voltage Generated during Converter Operation
Due to the switching characteristics of power semiconductor devices, the rise time of
the current converter output voltage can be within the range of 0.05 μs ~ 2 μs. IEC/TS
61800-8 may be used to calculate the motor terminal voltage fed from the converter,
and the motor terminal voltage depends on several characteristics of the power supply
system, such as.
5 Electrical Stresses in the Insulation System of Motor Windings
Due to the space and surface discharge generated in the insulation components, the
electrical stress depends on not only the transient voltage itself, but also the peak
voltage that the previous insulation withstands. Experience has shown that within a
certain effective limit of the various frequency power supply system, the stress
parameter is the peak to peak voltage.
6 Types of Motor Insulation
This Part and IEC/TS 60034-18-42 divide winding insulations into two types. Type I
winding insulation (Figure 5) is not expected to withstand PD at any part of the
insulation during its life.
7 Stress Categories for Type I Insulation Systems Used in Motors Fed from Converters
In order to obtain sufficient reliability of the electric drive system, the strength of the
motor winding insulation system shall be coordinated with the electrical stress that it
bears. In other words,
8 Qualification and Type Tests of Type I Insulation Systems
For Type I insulation systems, partial discharge test needs to be conducted to prove
that there is no partial discharge[5][6]. The complete winding or motor is subjected to a
voltage suitable for the selected stress category (Table 4), multiplied by the safety
factor (Table B.2).
9 Test Equipment
In accordance with IEC/TS 61934, use impulse voltage for PD test; the background
noise level is expressed in mV. In accordance with IEC/TS 61934, record the
background noise level and the sensitivity.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 22720.1-2017 be delivered?Answer: The full copy PDF of English version of GB/T 22720.1-2017 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 GB/T 22720.1-2017_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 22720.1-2017_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 -- GB/T 22720.1-2017 -- 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 GB/T 22720.1-2017?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 22720.1-2017 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 GB/T 22720.1-2017?A step-by-step guide to download PDF of GB/T 22720.1-2017_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 "GB/T 22720.1-2017".
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
|