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GB/T 22720.2-2019Rotating electrical machines - Qualification tests for the partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters (English PDF)

旋转电机电压型变频器供电的旋转电机耐局部放电电气绝缘结构（Ⅱ型）的鉴定试验

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

June 4, 2019

Implementation date

January 1, 2020

Scope

GB/T 22720.2-2019 is the English-translated version of 旋转电机电压型变频器供电的旋转电机耐局部放电电气绝缘结构（Ⅱ型）的鉴定试验.

GB/T 22720.2-2019 is the Chinese standard "Rotating electrical machines - Qualification tests for the partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters".

Its scope clause reads: This part of GB/T 22720 specifies the supply of pulse width modulation (PWM) inverters that generate repeated surge voltages and during operation.

Evaluation criteria for stator/rotor winding insulation structures for single or multiphase AC motors subject to partial discharge. This section specifies a typical test An electrical qualification test to verify the match with a voltage-type inverter.

This section also describes the new rating system, which is a hierarchical system. It specifies the limit of reliability of the insulation structure under the power supply conditions of the inverter.

Although this section applies to voltage-type inverters, there are other types of inverters that generate repeated surge voltages. For this type of change The frequency converter can be tested in a similar manner.

Rotating motors that use voltage-type inverters only at start-up do not need to identify their insulation structure and are therefore outside the scope of this section.

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Document preview — GB/T 22720.2-2019

National Standard of the People's Republic of China

ICS: 29.160.01
Classification: K 20
Replacing: GB/Z 22720.2-2013

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Motor terminal voltage generated when the inverter is running
5 Electrical stress of the motor winding insulation structure
6 Type II insulation structure voltage rating
7 Stress factor 10 of the type II insulation structure supplied by the inverter
8 Identification test
9 Identification of main insulation structure
10 Identification of turn-to-turn insulation
11 Identification of anti-halation structure
12 Preparation of test samples
13 Identification test procedures
14 Qualification Test Qualification Guidelines
15 Inspection test
16 Optional screening test
17 Analysis, reporting and grading
Appendix A (informative) Contribution to primary insulation aging
Appendix B (informative) Impact Test Circuit Example
Appendix C (informative) Derivation of short-term durability test voltage
Appendix D (informative) Derivation of the insulation level of the motor insulation impulse voltage
Appendix E (Normative) Derivation of IVIC when the manufacturer's baseline life curve is missing
Appendix F (informative) Optional screening test

1 Scope

This part of GB/T 22720 specifies the supply of pulse width modulation (PWM) inverters that generate repeated surge voltages and during operation.

Evaluation criteria for stator/rotor winding insulation structures for single or multiphase AC motors subject to partial discharge. This section specifies a typical test

An electrical qualification test to verify the match with a voltage-type inverter. This section also describes the new rating system, which is a hierarchical system.

It specifies the limit of reliability of the insulation structure under the power supply conditions of the inverter.

Although this section applies to voltage-type inverters, there are other types of inverters that generate repeated surge voltages. For this type of change

The frequency converter can be tested in a similar manner.

Rotating motors that use voltage-type inverters only at start-up do not need to identify their insulation structure and are therefore outside the scope of this section.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 17948.7-2016 General rules for the functional evaluation of insulating structures for rotating electrical machines (IEC 60034-18-1.2010, IDT)

GB/T 22720.1-2017 Rotating electric machine voltage type inverter-powered rotating electric machine without partial discharge (type I) electrical insulation junction

Identification and quality control tests (IEC 60034-18-41.2014, IDT)

IEC 60034-1.2010 Rotating electrical machines - Part 1. Quantitative and performance (Rotating electrical machines - Part 1

Ratingandperformance)

Rotating electrical machines - Part 18-31. Functional evaluation of insulating structures

Thermal evaluation and classification of mechanical insulation structures (Rotating electricalal machines-Part 18-31. Functionalevaluationof insulationsystems-Testproceduresforform-woundwindings-Thermalevaluationandclassification

Ofinsulationsystemsusedinrotatingmachines)

Rotating electrical machines - Part 18-32. Functional evaluation of insulating structures - s (Rotatingelectricalmachines-Part 18-32. Functionalevaluationofinsulationsystems-Testproce-

Duresforform-woundwindings-Evaluationbyelectricalendurance)

IEC TS60034-27 Rotating electrical machines - Part 27. s.

lectricalmachines-Part 27.Off-linepartialdischargemeasurementsonthestatorwindinginsulation

Ofrotatingelectricalmachines)

IEC TS61934 Electrical Insulation Materials and Systems Partial Discharge (PD) Electrical Measurements with Instantaneous Rise and Repeated Impulse Voltage Conditions

Quantity [Electricalinsulatingmaterialsandsystems-Electricalmeasurementofpartialdischarges(PD)

Undershortrisetimeandrepetitivevoltageimpulses]

IEC 62539 Guidelines for the statistical analysis of electrical insulation breakdown data (Guideforthestatisticalanalysisofelecintricalsu-

Relationbreakdowndata)

GB/T 21707 | GB/T 22720.1 | GB/T 22719.1 | GB/T 22715 | GB/T 22714 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 71 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60034 · IEC 62539

Cited by

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