GB/T 22264.5-2022 in English
VALIDMounted digital display electric measuring instruments—Part 5：Special requirements for phase meters and power factor meters
- Issued on:2022-12-30
- Implemented on:2023-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$185.00
《GB/T 22264.5-2022安装式数字显示电测量仪表 第5部分：相位表和功率因数表的特殊要求》由TC104（全国电工仪器仪表标准化技术委员会）归口，TC104SC2（全国电工仪器仪表标准化技术委员会电工和电磁量测量设备分会）执行，主管部门为中国机械工业联合会。
Introduction
1. Background and significance of standard formulation
GB/T22264 series standards are important specifications in the field of electrical instruments in my country and have been used for more than ten years. With the advancement of technology and changes in market demand, some contents of the original standards have become outdated and urgently need to be revised to adapt to the development of new technologies.
2. Comparative analysis of standard frameworks
| Standard version | Main clauses | Technical updates |
|---|---|---|
| 2008 edition | Definition of phase meter and power factor meter | Specific definitions have been deleted and unified into the category of instruments |
| 2022 edition | Nominal voltage and current range | Add clear definition of nominal voltage and current |
| New content | Electromagnetic compatibility requirements | Detailed test conditions and value application methods |
3. Technology Update and Evolution Analysis
5.1 Standard Electricity Value: Added the range definition of nominal voltage and current, and clarified the frequency measurement requirements. Applicable to distribution systems with AC below 690V and nominal frequency of 50Hz or 60Hz.
5.2 Reference Conditions and Basic Errors: Table 1 updates the allowable deviation range, and the voltage and current deviations are optimized from ±2% to ±1.0%, improving the measurement accuracy requirements. Added the angle deviation limit (≤2°) under phase balance conditions.
4. Implementation suggestions and precautions
Case study: Instrument selection for a power distribution system
For a distribution cabinet with a rated voltage of 400V and a frequency of 50Hz, when selecting a digital display phase meter and power factor meter that meet the requirements of GB/T22264.5-2022:
- Confirm the instrument accuracy grade index (it is recommended to use 0.1 or 0.2 grade)
- Verify whether the overload protection function meets the requirements of the short-term overload test (as specified in Table 3)
- Check the electromagnetic compatibility indicators to ensure that the anti-interference and disturbance suppression capabilities meet the actual working conditions
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