GB/T 22264.7-2022 in English
VALIDMounted digital display electric measuring instruments—Part 7：Special requirements for multi-function instruments
- Issued on:2022-12-30
- Implemented on:2023-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
《GB/T 22264.7-2022安装式数字显示电测量仪表 第7部分：多功能仪表的特殊要求》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. Standard Overview
GB/T22264.7-2022 is the 7th part of the series of standards for "Mounted Digital Display Electrical Measuring Instruments", which specifically puts forward special requirements for multi-function instruments. This standard applies to newly manufactured mounted digital display electrical measuring multi-function instruments for measuring various electrical parameters in power distribution systems with a nominal frequency of 50Hz or 60Hz and a DC voltage of less than 750V and AC voltage of less than 690V.
2. Background of Standard Formulation
With the advancement of technology and changes in market demand, the original standard GB/T22264.7-2008 can no longer meet the current technical requirements. This revision combines the latest international standards (such as IEC610101:2010) and relevant domestic standards (such as GB/T17215.211-2021), focusing on improving product safety and functional requirements.
3. Comparison of standard frameworks
| Standard version | Main changes | Scope of application |
|---|---|---|
| GB/T22264.7-2008 | - DC voltage limit is not specified- Harmonic measurement requirements are not involved | Applicable only to AC systems |
| GB/T22264.7-2022 | - DC voltage limit is specified (≤750V) - Harmonic measurement function requirements are added- Safety performance requirements are improved | Applicable to both DC and AC systems |
4. Technical requirements interpretation
5.1 Standard electrical value:The instrument should comply with the provisions of GB/T22264.1-2022 on standard electrical value to ensure measurement accuracy.
5.3 Nominal use range and change amount:Table 1 specifies the nominal use range and allowable change amount of each electrical parameter, such as ±10% of the nominal value of voltage, 10%-120% of the nominal value of current, etc.
5.7 Electromagnetic compatibility:The instrument is required to work normally when it is disturbed by external factors, and the test conditions must comply with the provisions of GB/T22264.1-2022.
5. Implementation suggestions
- Select instruments that meet the standards: Make sure that the selected multi-function instrument meets the technical requirements of GB/T22264.7-2022, especially safety and electromagnetic compatibility.
- Establish maintenance system: regularly calibrate and check instrument performance to ensure long-term stability.
- Train operators: familiarize themselves with standard requirements and instrument functions, especially in applications such as harmonic measurement and imbalance monitoring.
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