TD4550 is an intelligent and highly integrated test system for calibrating three-phase energy meter and other AC electrical apparatus. It is built-in 3PH standard source. It can complete intrinsic error test, constant test, standard deviation test, starting current test, test of no-load of electric energy meter.
TD4550
TUNKIA
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TD4550 is an intelligent, highly integrated electrical instrument test system, a portable instrument dedicated to calibrating three-phase AC energy meters and power meters. It has a built-in three-phase standard source with three optional specifications: class 0.02 / class 0.05 / class 0.1. One device can complete the basic energy error detection, energy meter constant test, standard deviation, start-up test, creep test and other test items of the energy meter.
Accuracy:class 0.02, 0.05, 0.1
3PH ACV output:6 V~456 V
3PH ACI output:2 mA ~ 120 A
Multiple output mode, support three-phase or single adjust
U-I phase:0°~360°, accuracy 0.01°
Supports graphic display functions such as oscilloscope and phasor diagram
Built-in standard electric energy metering module, suitable for calibrating single energy meter
Large-size LCD touch color screen, with external operation console to adjust output
Able to load 2~21 harmonics with adjustable amplitude and phase(option)
Test software(option) supports semi-automatic or fully automatic calibration

☆ Calibrating Single and Three-Phase Electrical Measuring Devices | |
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☆ Test Single / Three-Phase Energy Meter |
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☆ Front Panel | |
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S/N | Description |
| The operation console interface can be connected to an external operation console with digital buttons, making it convenient for users to set the output value. |
| The instrument has a pair of handles on the front and back panels to facilitate users to carry the instrument. |
| LCD touch color screen, intuitive display of multiple power levels, and full touch operation greatly improve the usability of the instrument. |
| UA, UB, UC 3-phase voltage output terminals |
| IA, IB, IC 3-phase current output terminals |
| Foldable feet: can slightly raise the instrument to a certain angle to obtain the best operating and reading viewing angle. |
☆ Rear Panel | |
| |
S/N | Description |
| Energy pulse output terminal |
| Energy pulse output terminal |
| Multifunctional interface, can be connected to photoelectric head pulse signal, etc. |
| RS232 terminal, used for communication with a computer. |
| Equipment protective grounding terminal. |
| 220V power supply terminal at the power switch and fuse position. |

TD4550 is an intelligent, highly integrated electrical instrument test system, a portable instrument dedicated to calibrating three-phase AC energy meters and power meters. It has a built-in three-phase standard source with three optional specifications: class 0.02 / class 0.05 / class 0.1. One device can complete the basic energy error detection, energy meter constant test, standard deviation, start-up test, creep test and other test items of the energy meter.
Accuracy:class 0.02, 0.05, 0.1
3PH ACV output:6 V~456 V
3PH ACI output:2 mA ~ 120 A
Multiple output mode, support three-phase or single adjust
U-I phase:0°~360°, accuracy 0.01°
Supports graphic display functions such as oscilloscope and phasor diagram
Built-in standard electric energy metering module, suitable for calibrating single energy meter
Large-size LCD touch color screen, with external operation console to adjust output
Able to load 2~21 harmonics with adjustable amplitude and phase(option)
Test software(option) supports semi-automatic or fully automatic calibration

☆ Calibrating Single and Three-Phase Electrical Measuring Devices | |
| |
|
☆ Test Single / Three-Phase Energy Meter |
|
|
☆ Front Panel | |
| |
S/N | Description |
| The operation console interface can be connected to an external operation console with digital buttons, making it convenient for users to set the output value. |
| The instrument has a pair of handles on the front and back panels to facilitate users to carry the instrument. |
| LCD touch color screen, intuitive display of multiple power levels, and full touch operation greatly improve the usability of the instrument. |
| UA, UB, UC 3-phase voltage output terminals |
| IA, IB, IC 3-phase current output terminals |
| Foldable feet: can slightly raise the instrument to a certain angle to obtain the best operating and reading viewing angle. |
☆ Rear Panel | |
| |
S/N | Description |
| Energy pulse output terminal |
| Energy pulse output terminal |
| Multifunctional interface, can be connected to photoelectric head pulse signal, etc. |
| RS232 terminal, used for communication with a computer. |
| Equipment protective grounding terminal. |
| 220V power supply terminal at the power switch and fuse position. |
5. Characteristics
☆ Wide Output |
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☆ Convenient Operation |
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☆ Multiple Value Output Modes |
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☆ Multiple Value Output Modes |
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☆ Harmonics Function (Option) | |
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S/N | Function |
| Set the amplitude of the selected harmonic. You can set the absolute value of the voltage or current harmonic, or set it as a percentage of the fundamental. |
| Set the phase of the selected harmonic first (relative to the fundamental wave). |
| The instrument has the output function of the 2nd to 21st harmonics. The embedded software is equipped with a user-defined "harmonic parameter setting" interface. The user can set the required harmonics according to the test requirements. |
| It has an oscilloscope function, which can observe the AC phase power waveform after the harmonic is loaded. |
| The spectrum of each harmonic is intuitively displayed in the form of a bar graph (the fundamental wave is 100%). |
☆ Testing Software(Option) |
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5. Characteristics
☆ Wide Output |
|
|
☆ Convenient Operation |
|
|
☆ Multiple Value Output Modes |
|
|
|
|
☆ Multiple Value Output Modes |
|
|
|
|
☆ Harmonics Function (Option) | |
| |
S/N | Function |
| Set the amplitude of the selected harmonic. You can set the absolute value of the voltage or current harmonic, or set it as a percentage of the fundamental. |
| Set the phase of the selected harmonic first (relative to the fundamental wave). |
| The instrument has the output function of the 2nd to 21st harmonics. The embedded software is equipped with a user-defined "harmonic parameter setting" interface. The user can set the required harmonics according to the test requirements. |
| It has an oscilloscope function, which can observe the AC phase power waveform after the harmonic is loaded. |
| The spectrum of each harmonic is intuitively displayed in the form of a bar graph (the fundamental wave is 100%). |
☆ Testing Software(Option) |
|
|
6. Specifications
6.1 Three-Phase Voltage / Current Output
Voltage Range | Stability ( %/min ) | Uncertainty (k=2) (ppm of reading + ppm of range) [1] | Max Burden (mA) | ||||
Class 0.1 | Class 0.05 | Class 0.02 | Class 0.1 | Class 0.05 | Class 0.02 | ||
57.7 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 500 |
100 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 300 |
220 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 130 |
380 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 80 |
Note [1] : (ppm = parts per million) (e.g.,10ppm = 0.001%). | |||||||
Current Range | Stability ( %/min ) | Uncertainty (k=2) (ppm of reading + ppm of range) [1] | Max Burden (V) | ||||
Class 0.1 | Class 0.05 | Class 0.02 | Class 0.1 | Class 0.05 | Class 0.02 | ||
20 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
50 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
100 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
200 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
500 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
1 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
2 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 6 |
5 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 6 |
10 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 2 |
20 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 2 |
50 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 0.6 |
100 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 0.6 |
• Three-phase voltage output:6 V~456 V, Three-phase current output:2 mA~120 A
• Degree of distortion:<0.5%
• Degree of symmetry:voltage <0.2%, current <0.5%, phase <0.5°
• Voltage short circuit, current open-circuit and overload protection
6.2 Frequency / Phase / Harmonic
Frequency | Range:45 Hz~65Hz; Adjustment fineness:0.001 Hz; Uncertainty (k=2):0.01Hz |
Phase | Range:0.000 0°~359.999 9°; Adjustment fineness:0.005°; Uncertainty (k=2):0.05° (class 0.1), 0.02° (class 0.05), 0.01°(class 0.02) |
Harmonic | 2nd~21st harmonic; Amplitude 0~25% adjustable; Phase 0~359.99°adjustable |
6.3 Power / Energy Output
Type | Current range | Class 0.1 | Class 0.05 | Class 0.02 |
Output power stability ( % / 2min ) | 50 mA≤I≤120 A | 0.05 | 0.02 | 0.01 |
2 mA≤I< 50 mA | 0.05 | 0.03 | 0.02 | |
Active power /energy |cos Φ| ≥0.5 | 50 mA≤I≤120 A | ± 0.1%*reading | ± 0.05%*reading | ± 0.02%*reading |
2 mA≤I< 50 mA | ± 0.2%*FS③ | ± 0.1%*FS | ± 0.05%*FS | |
Reactive power /energy |sin Φ| ≥0.5 | 50 mA≤I≤120 A | ± 0.2%*FS | ± 0.1%*FS | ± 0.05%*FS |
2 mA≤I< 50 mA | ± 0.5%*FS | ± 0.2%*FS | ± 0.1%*FS | |
Power factor | 50 mA≤I≤120 A | ± 0.1% | ± 0.05% | ± 0.02% |
2 mA≤I< 50 mA | ± 0.2% | ± 0.1% | ± 0.05% | |
Note③ :FS= voltage range × current range | ||||
• Power/energy measure range:combination of voltage range and current range
• Power factor measure range:-1.000 00…0.000 00…1.000 00
• Energy pulse output:High frequency full range is 60 kHz, Low frequency full range is 6 Hz
• Energy pulse input:Frequency ≤ 150 kHz, pulse level::0…3.3 V…24 V
• Energy error display:auto,resolution as 0.0001%
7. General Specifications
Power Supply | AC ( 220 ± 22 ) V,( 50 ± 2 ) Hz |
| Warm Up Time | 30 min |
Temperature Performance | Working temperature:0°C~45°C; Storage temperature:-20°C~70°C |
Humidity Performance | Working humidity:< 80% @ 30°C, < 70% @ 40°C, < 40% @ 50°C Storage humidity:(20%~80%) R·H,non-condensing |
| Altitude | <3000 m |
| Weight | About 29 kg |
Interface | RS232 |
| Dimension | 490 mm(W) × 485 mm(D) × 200 mm(H) (Without handle) |
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8. Ordering Information

6. Specifications
6.1 Three-Phase Voltage / Current Output
Voltage Range | Stability ( %/min ) | Uncertainty (k=2) (ppm of reading + ppm of range) [1] | Max Burden (mA) | ||||
Class 0.1 | Class 0.05 | Class 0.02 | Class 0.1 | Class 0.05 | Class 0.02 | ||
57.7 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 500 |
100 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 300 |
220 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 130 |
380 V | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 80 |
Note [1] : (ppm = parts per million) (e.g.,10ppm = 0.001%). | |||||||
Current Range | Stability ( %/min ) | Uncertainty (k=2) (ppm of reading + ppm of range) [1] | Max Burden (V) | ||||
Class 0.1 | Class 0.05 | Class 0.02 | Class 0.1 | Class 0.05 | Class 0.02 | ||
20 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
50 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
100 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
200 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
500 mA | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
1 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 24 |
2 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 6 |
5 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 6 |
10 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 2 |
20 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 2 |
50 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 0.6 |
100 A | 0.02 | 0.01 | 0.005 | 600+400 | 300+200 | 120+80 | 0.6 |
• Three-phase voltage output:6 V~456 V, Three-phase current output:2 mA~120 A
• Degree of distortion:<0.5%
• Degree of symmetry:voltage <0.2%, current <0.5%, phase <0.5°
• Voltage short circuit, current open-circuit and overload protection
6.2 Frequency / Phase / Harmonic
Frequency | Range:45 Hz~65Hz; Adjustment fineness:0.001 Hz; Uncertainty (k=2):0.01Hz |
Phase | Range:0.000 0°~359.999 9°; Adjustment fineness:0.005°; Uncertainty (k=2):0.05° (class 0.1), 0.02° (class 0.05), 0.01°(class 0.02) |
Harmonic | 2nd~21st harmonic; Amplitude 0~25% adjustable; Phase 0~359.99°adjustable |
6.3 Power / Energy Output
Type | Current range | Class 0.1 | Class 0.05 | Class 0.02 |
Output power stability ( % / 2min ) | 50 mA≤I≤120 A | 0.05 | 0.02 | 0.01 |
2 mA≤I< 50 mA | 0.05 | 0.03 | 0.02 | |
Active power /energy |cos Φ| ≥0.5 | 50 mA≤I≤120 A | ± 0.1%*reading | ± 0.05%*reading | ± 0.02%*reading |
2 mA≤I< 50 mA | ± 0.2%*FS③ | ± 0.1%*FS | ± 0.05%*FS | |
Reactive power /energy |sin Φ| ≥0.5 | 50 mA≤I≤120 A | ± 0.2%*FS | ± 0.1%*FS | ± 0.05%*FS |
2 mA≤I< 50 mA | ± 0.5%*FS | ± 0.2%*FS | ± 0.1%*FS | |
Power factor | 50 mA≤I≤120 A | ± 0.1% | ± 0.05% | ± 0.02% |
2 mA≤I< 50 mA | ± 0.2% | ± 0.1% | ± 0.05% | |
Note③ :FS= voltage range × current range | ||||
• Power/energy measure range:combination of voltage range and current range
• Power factor measure range:-1.000 00…0.000 00…1.000 00
• Energy pulse output:High frequency full range is 60 kHz, Low frequency full range is 6 Hz
• Energy pulse input:Frequency ≤ 150 kHz, pulse level::0…3.3 V…24 V
• Energy error display:auto,resolution as 0.0001%
7. General Specifications
Power Supply | AC ( 220 ± 22 ) V,( 50 ± 2 ) Hz |
| Warm Up Time | 30 min |
Temperature Performance | Working temperature:0°C~45°C; Storage temperature:-20°C~70°C |
Humidity Performance | Working humidity:< 80% @ 30°C, < 70% @ 40°C, < 40% @ 50°C Storage humidity:(20%~80%) R·H,non-condensing |
| Altitude | <3000 m |
| Weight | About 29 kg |
Interface | RS232 |
| Dimension | 490 mm(W) × 485 mm(D) × 200 mm(H) (Without handle) |
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8. Ordering Information

