1. Summary
TD3760 is an AC power device specially designed for complex waveform current influence test of new AC energy meters. It meets the test requirements of relevant current influence in OIML R46. The device directly outputs complex current waveforms with high stability and accuracy through the three phase precision standard power source, which can complete the following test items.
（1）Impact Test of DC and Even Harmonics (The device can directly output half-wave current, no longer use the traditional scheme (rectifier diode) )
（2）Impact Test of Harmonic in Voltage-current Circuits,
（3）Impact Test of Inter-harmonic in Current Circuits
（4）Impact Test of Odd Harmonic in Current Circuits
（5）High-order Harmonic Test
（6）Burden Current Fast Change Test
Up to 12 test positions. Accuracy Class 0.05.
2. Features
Current Output: Provides a full-wave RMS AC current output ranging from 20 mA to 120 A, and a half-wave peak current output from 20√2 mApk to 120√2 Apk. It fully meets the requirements for influence quantity testing with complex current waveforms, including those with a maximum current (Imax) of up to 100 A for smart meters, while ensuring stable output values even under full-load conditions.
Direct Half-Wave Output: For DC even-order harmonic tests, the device can directly output a maximum peak half-wave current of 120√2 Apk through the power amplifier, eliminating the need for traditional rectifier diode solutions. This design avoids the need for a separate half-wave rectification circuit and resolves impedance matching issues commonly associated with diode rectifiers.
Harmonic Output Capability: Supports harmonic output from the 2nd to the 63rd order @ 50 Hz / 60 Hz, with programmable control of harmonic amplitude and phase. This forms the basis for conducting complex waveform tests and high-order harmonic sweep tests on the meter under test.
Impact Test of Harmonic in Voltage-current Circuits: Built in square-wave, peaked wave, inter-harmonic and other schemes.
Impact Test of Inter-harmonic in Current Circuits: The device can directly output the inter-harmonic.
Impact Test of Odd Harmonic in Current Circuits: The device can directly output the odd harmonic.
High-order Harmonic Test: Built in high-order harmonic test schemes. So it automatically superposes the 15fnom to 40fnom sweep signals to the voltage and current loops and reads the data of each harmonic to measure the error offset caused by the high-order harmonic.
Burden Current Fast Change Test: The user can set the duration of ton and toff, as well as the total time for a single test. The current switches at zero crossing and switches off and on within one nominal frequency period. The repetition time of single test was more than 4 hours.
Communication: Communicate with DUT through RS-485 communication port.
Multi-position Verification Platform: Optional 3,6,12,16 positions.
Dedicated Calibration Software: Supports semi-automatic or fully automatic calibration of the meter under test, as well as data management and certificate export. The software features multi-measurement capability at a single test point with configurable time intervals and automatically generates error curve charts.
3. Typical Output Waveform
3.1 Half-wave Rectification Waveform (DC and Even Harmonics)
3.2 Waveform of the Impact Test of Harmonic
3.3 Inter-harmonic
3.4 Odd Harmonic
4. Specifications
4.1 AC Voltage Output
Range | Resolution | Short-term Stability ( % / min ) | Accuracy ± (ppm of reading + ppm of range) [1] | Distortion Factor ( % ) |
60 V | 0.1 mV | 0.01 | 120 + 80 | < 0.3 |
120 V | 1 mV | 0.01 | 120 + 80 | < 0.3 |
240 V | 1 mV | 0.01 | 120 + 80 | < 0.3 |
480 V | 1 mV | 0.01 | 120 + 80 | < 0.3 |
Note [1] : (ppm = parts per million) (e.g., 10ppm = 0.001%). | ||||
• Output range: 6 V～528 V, 6-digits display, load capacity: 15 VA/ (phase ·position)
• Symmetry: Voltage ≤ 0.2%, Phase ≤ 0.5°
• Protective function: Short-circuit protection, Overload protection
4.2 AC Current Output
Range | Resolution | Short-term Stability ( % / min ) | Accuracy ± (ppm of reading + ppm of range) | Distortion Factor ( % ) |
100 mA | 1 μA | 0.01 | 200 + 100 | < 0.2 |
200 mA | 1 μA | 0.01 | 200 + 100 | < 0.2 |
500 mA | 1 μA | 0.01 | 200 + 100 | < 0.2 |
1 A | 10 μA | 0.01 | 200 + 100 | < 0.2 |
2 A | 10 μA | 0.01 | 200 + 100 | < 0.2 |
5 A | 10 μA | 0.01 | 200 + 100 | < 0.2 |
10 A | 100 μA | 0.01 | 200 + 100 | < 0.2 |
20 A | 100 μA | 0.01 | 200 + 100 | < 0.2 |
50 A | 100 μA | 0.01 | 200 + 100 | < 0.2 |
100 A | 1 mA | 0.01 | 200 + 100 | < 0.2 |
• Output range: 20mA～120 A@ full wave, 6-digits display
• Symmetry: Current ≤ 0.5%, Phase ≤ 0.5°
• Protective function: Open-circuit protection, Overload protection, Overheating protection
4.3 Frequency / Phase / Harmonic
Type | Range of Regulation | Accuracy |
Frequency | 45.000 0Hz～100.000 Hz | 50 ppm*RD |
Phase | 0.000°～359.999° | 0.012° |
Harmonic Output | the 2nd ~ 63st @ 50 Hz / 60 Hz (support single or multiple simultaneous stacking), harmonic content and phase are programmable (Amplitude: 0～40% , Phase: 0.0°～359.9°). | |
4.4 Power / Electrical Energy
• Uncertainty of Measurement (k=2): 0.05%*RD
• Output Power Stability: 0.02% / 2min
• Power/Electric Energy Measuring Range: The combination of AC voltage and current range
• Power Factor Measuring Range: -1.000 00…0.000 00…1.000 00
• Standard Electric Energy Pulse output: High frequency pulse output port outputs 60 kHz at full range, low frequency pulse output port outputs 6 Hz at full range;
• Standard Energy Pulse Input: Frequency ≤ 200 kHz, Voltage: 0...3.3 V...24 V
• Electric Energy Error Display: Auto, resolution is 0.0001%.
5. General Specifications
Power Supply | Single-phase AC ( 220 ± 22 ) V, ( 50 ± 2 ) Hz |
Warm Up Time | 30 min |
Temperature | Operating Temperature: 18°C~28°C； Storage Temperature: -10°C~55°C |
Humidity Performance | Operating Humidity: < 80% @ 30°C, < 70% @ 40°C, < 40% @ 50°C Storage Humidity: (20%~80%) R·H, Non-Condensing |
Communication Interface | RS232, RS485, LAN |
6. Ordering Information
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