GB/T 20111.5-2020 in English
VALIDElectrical insulation systems—Procedures for thermal evaluation—Part 5: Applications with a designed life of 5000h or less
- Issued on:2020-06-02
- Implemented on:2020-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 20111.5-2020 |
| Document status: | VALID |
| Title in English: | Electrical insulation systems—Procedures for thermal evaluation—Part 5: Applications with a designed life of 5000h or less |
| Title in Chinese: | 电气绝缘系统 热评定规程 第5部分:设计寿命5000h及以下的应用 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-06-02 |
| Implemented on: | 2020-12-01 |
| ICS Classification: | 29.080.30-Insulation systems |
| Chinese Classification: | K15-Electrical insulating material and its products |
| Professional Classification: | GB-National Standard |
| Related Topics: | Design life
GBT20111.5 GBT20111.5-2020 |
《GB/T 20111.5-2020电气绝缘系统 热评定规程 第5部分:设计寿命5000h及以下的应用》由TC301（全国电气绝缘材料与绝缘系统评定标准化技术委员会）归口，主管部门为中国电器工业协会。
Introduction
Interpretation of the core content of the standard
GB/T20111.5-2020 establishes a systematic thermal assessment technical framework for application scenarios of electrical insulation systems with a design life of ≤5000h. The standard innovatively proposes three procedural assessment schemes:
| Assessment procedure | Scope of application | Temperature requirement | Life determination |
|---|---|---|---|
| Procedure A | ≤1500h | ≥design temperature+10K | Average life ≥1500h |
| Procedure B | ≤5000h | ≥design temperature+10K | can be extended to 5000h |
| Procedure C | ≤5000h | Dual temperature points (20-35K) | Aging diagram analysis method |
Key technical requirements
1. Temperature gradient control
The standard clearly stipulates: The high temperature point should be 10K higher than the low temperature point, among which:
- Low temperature point: design temperature +20K~30K
- High temperature point: design temperature +30K~35K
2. Test cycle design
Each test cycle includes:
- Thermal aging sub-cycles specified in GB/T20112
- Conditional treatment specified in GB/T20111.4
- Diagnostic test (selected according to GB/T20111.4)
Analysis of implementation points
Case: Evaluation of insulation system of new energy vehicle motor
A certain type of drive motor adopts epoxy resin impregnation system, with a design life of 3000h:
- Select Procedure B for evaluation
- Set aging temperature = design temperature (180℃) + 15K = 195℃
- The system did not fail when the cumulative aging time reached 3200h
- The final evaluation result was EIS TE180℃/3000h
Comparison of standard evolution
| Version | Core changes | Technological breakthroughs |
|---|---|---|
| IEC61857-31:2017 | Basic framework | Single temperature point evaluation |
| GB/T20111.5-2020 | Localization improvement | New double temperature point method |
Application recommendations
- Procedure selection: Short-term application (≤1500h) preferably uses procedure A, while medium- and long-term application recommends procedure C
- Temperature verification: The actual temperature gradient needs to be confirmed by an infrared thermal imager or other equipment
- Data recording: Strictly record parameters such as oven type and ventilation rate in accordance with the requirements of Chapter 8
- Extended application: When the assessment scope needs to be upgraded, the benchmark EIS comparison test should be supplemented
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 22566-2017 in English
Electrical insulating materials and systems―General method of evaluation of electrical endurance under repetitive voltage impulses
2017-12-29 -
GB/T 23756.2-2010 in English
Evaluation of electrical endurance of electrical insulation systems—Part 2:Evaluation procedures based on extreme-value distributions
2011-01-14 -
GB/T 26170-2010 in English
Electrical insulation systems—Short-time evaluation of combined thermal and electrical stresses
2011-01-14 -
GB/T 22578.1-2017 in English
Electrical insulation systems(EIS)―Thermal evaluation of combined liquid and solid components―Part 1:General requirements
2017-12-29
