GB/T 22714-2008 in English

《GB/T 22714-2008交流低压电机成型绕组匝间绝缘试验规范》由TC26（全国旋转电机标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准为首次发布。本标准规定了交流电机成型绕组匝间绝缘试验方法、试验参数和试验限值。
本标准适用于额定电压为1140V 及以下的中小型交流电机成型绕组匝间绝缘检测。

1 Scope

This standard specifies the test methods, test parameters and test limits of interturn insulation of form-wound winding for AC electrical machines.

This standard is applicable to the inspection of interturn insulation of form-wound winding for small and medium AC electrical machine with rated voltage of 1140V or below.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB 755-2008 Rotating Electrical Machines - Rating and Performance (IEC 60034-1: 2004, IDT)
GB/T 8170-2008 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values
JB/T 9615.1-2000 Test Methods of the Interturn Insulation on Random Wound Winding for Ac Low-voltage Machines
JB/T 9615.2-2000 Test Limits of the Interturn Insulation on Random Wound Winding for Ac Low-voltage Machines
JB/T 10098-2000 Impulse Voltage Withstand Levels of Rotating A.C. Machines With Form-wound Stator Coils

3 Terms and Definitions

For the purposes of this standard, the following terms and definitions apply.

3.1
comparison method of impulse waveforms

one test method of interturn insulation of electrical machine winding (or coil) with impulse voltage

Principle: directly apply the impulse voltage wave with specified peak and wave front time on a tested piece and reference winding (or coil) with same design alternately (or simultaneously), and then detect whether the interturn insulation of electrical machine winding (or coil) is in good condition by their damped oscillating waveform difference caused by impulse voltage

Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Test Principle
5 Test Instruments and Requirements
6 Test Methods
7 Waveform in Test and Its Display
8 Selection Principle of Test Methods
9 Test Judgment
10 Test and Comparison Parameters
11 Test Limit
12 Repeated Tests and Test Procedures