GB/T 44992-2024 in English
VALIDTesting equipment for harmonic meters of active energy
- Issued on:2024-12-31
- Implemented on:2025-07-01
- File Format:PDF
- Delivery:Within 1 day
$466.00
| Standard No: | GB/T 44992-2024 |
| Document status: | VALID |
| Title in English: | Testing equipment for harmonic meters of active energy |
| Title in Chinese: | 谐波有功电能表检验装置 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2024-12-31 |
| Implemented on: | 2025-07-01 |
| ICS Classification: | 17.220.20-Measurement of electrical and magnetic quantities |
| Chinese Classification: | N29-Electrical parametric test and power supply unit |
| Professional Classification: | GB-National Standard |
| Related Keywords: | harmonic meters
three-phase harmonic test device harmonic order harmonic mixture standard technical dimension fundamental power requirements harmonic power requirements accuracy |
| Related Topics: | electrical energy
organic functional molecules Meter Half-wave plate function cable tuning device Packaging Inspection Form |
《GB/T 44992-2024谐波有功电能表检验装置》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
Analysis of the core content of the standard
| Technical dimension | Fundamental power requirements | Harmonic power requirements |
|---|---|---|
| Accuracy level | 0.02/0.05/0.1 level | 0.2/0.5/1 level |
| Voltage range | 30-300V (resolution 0.1V) | |
| Harmonic order | - | 2-50th (amplitude error ±0.2%) |
Key technical requirements
Mechanical properties
Protection level: not less than IP20, electrical clearance and creepage distance must meet the requirements of Table 1 (such as the minimum creepage distance of 6.3mm under 300V voltage)
Hanging meter system: Each meter position must be equipped with voltage/current output terminals, pulse interface and communication interface, and the current terminal must have open circuit protection function
Electrical performance
Harmonic source Output requirements:
- Fundamental frequency stability: ±0.02% (49-51Hz range)
- Harmonic phase control: 2-20th harmonic ±0.5°, 21-50th ±1°
- Power stability: 0.02-level device ≤0.025%
Metering Performance Verification
| Test Type | Test Conditions | Allowable Error |
|---|---|---|
| Fundamental Wave Energy | Ic Current, cosφ=1.0 | 0.02 Level: ±0.02% |
| Single Harmonic | h=50th, Ih=0.4I1 | 0.5 Level: ±0.605% (including H coefficient) |
| Combined Harmonics | Appendix B Typical Waveform | 0.2 Level: ±0.3% |
Typical application scenarios
When a provincial metrology center uses a three-phase harmonic test device to verify smart meters:
- Test according to B.4 waveform (3rd/5th/7th harmonic mixture)
- Ambient temperature is controlled at 23±2℃
- 24-hour variation ≤0.06% (0.2-level device)
Implementation suggestions
Purchase acceptance: Focus on checking key items such as insulation resistance (≥10MΩ), basic error (Table 15-17), and monitoring system indication error (Table 25-26) in the factory inspection report
Periodic maintenance: Power frequency magnetic field immunity (0.5mT) and annual stability (0.02 level ≤±0.01%) need to be retested every year
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