Product Introduction
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.The Double Clamps Digital Phase Meter is a portable, high-precision instrument for on-site voltage, current, and phase measurements. It enables safe, non-intrusive testing (no need to disconnect lines) and can measure phase differences (U-U, I-I, U-I), phase sequence, transformer wiring groups, differential protection systems, and meter connections. With fully insulated dual-channel inputs, it prevents short circuits and equipment damage. The high-contrast LCD (up to 25mm characters) features a 70° adjustable viewing angle for optimal readability. Ideal for field diagnostics with reliability and ease of use.
 |  |  |
Product functions
1. AC voltage measurement — Measures AC voltage with a maximum range of up to 500V, suitable for on-site voltage parameter detection.
2. AC current measurement — Current measurement via clamp-on sensors, with a range of approximately 10mA to 10A, without the need to disconnect the circuit under test.
3. Phase difference measurement — Can measure the phase difference between two voltages, two currents, and between voltage and current (i.e., U-U, I-I, U-I). The phase measurement range is 0 to 360°.
4. Phase sequence detection — Can determine the phase sequence relationship of three-phase systems, assisting in verifying whether the wiring of three-phase lines is correct.
5. Transformer connection group / wiring relationship detection — Utilizes voltage, current, and phase relationships for on-site determination of transformer wiring conditions.
6. Differential protection system testing — Can be used for checking current, voltage, and phase relationships in differential protection circuits, helping to determine whether differential protection wiring is correct.
7. Energy meter wiring verification — Can detect voltage, current, and phase relationships related to energy meters, for on-site identification of wiring issues in metering circuits.
Fitur Produk
1、Compact & Handheld Design – Portable and user-friendly.
2、Wide Measurement Range – Measures current (10mA–10A) and voltage (3V–500V) without breaking the circuit.
3、High-Contrast LCD – 25mm-tall characters with 70° adjustable tilt for optimal visibility.
4、Intuitive Function Switch – Quickly toggle between voltage, current, and phase measurements.
5、High-Precision Clamp Sensors – 0.1mA current & 0.1V resolution (patented technology).
6、Low Power Consumption – Energy-efficient design with battery voltage monitoring.
Parameter Produk
Reference to working conditions
| Suhu lingkungan | (23±5)℃ |
| Kelembaban lingkungan | (45～75)% RH |
| Measured signal waveform | Sine wave、β=0.02 |
| Measured signal frequency | (50±0.2)Hz |
| The position of the measured current- carrying conductor at the clamp mouth | any |
| The amplitude of The measured signal when measuring The phase | 100～220V、0.5～1.5A |
| External reference frequency electromagnetic field interference | Should be avoided |
Measurement error of AC voltage
| Limit of quantity | Resolusi | Basic error limit |
| 20V | 0,01V | ±（0.3% reading +0.2% range) |
| 200V | 0.1V | |
| 500V | 1V |
Measurement error of ac current
| Limit of quantity | Resolusi | Basic error limit |
| 200mA | 0.1mA | ±（0.3% reading +0.2% range) |
| 2A | 1mA | |
| 10A | 10mA |
Voltage input circuit impedance when u1-u2 phase is measured：40KΩ
| Jangkauan | Resolusi | Basic error limit |
| 0～360° | 1° | ±2° |
Rated working condition
| Suhu lingkungan | (0～40)℃ | |
| Kelembaban lingkungan | (20～80)% RH | |
| Measured signal waveform | Sine wave、β=0.05 | |
| Measured signal frequency | (50±0.5)Hz | |
| The position of the measured current- carrying conductor at the clamp mouth | any | |
| The amplitude of The measured signal when measuring The phase | U1-U2 phase: 30V ~ 500V | |
| I1-I2 phase: 10mA ~ 10.00A | ||
| U1-I2 phase or I1-U2 phase: 10V ~ 500V, 10mA ~ 10.00A | ||
| External reference frequency electromagnetic field interference | Should be avoided | |
| Limit of rated operating error | Under the above rated working conditions, the rated working error limit of each measured shall not exceed twice the corresponding basic error limit | |
Other technical features
| Display digit | Three and a half | |
| Tingkat pengambilan sampel | 3 times per second | |
| Catu daya | Single 9V laminated battery, The power supply current is less than 5mA | |
| Dimensi keseluruhan | Case size | 192×95×55mm3 |
| Clamp shell size | 140×42×20mm3 | |
| Ukuran rahang | Φ7mm×9mm | |
| Berat | Body | 280g |
| Test forceps | 2×200g | |
| Kondisi penyimpanan | Suhu | －10℃～50℃ |
Application Scenarios
Substations: Used for voltage, current, phase, and phase sequence detection, checking whether CT/PT secondary circuits and equipment wiring are correct.
Transformers: Used to check the phase relationship between various circuits of the transformer, assisting in determining the connection group and whether there are any wiring abnormalities.
Relay protection: Can be used for phase and wiring checks of CT secondary circuits, differential protection systems, and more, assisting in protection device commissioning and acceptance.
Energy metering: Used for checking energy meters and metering circuits, determining whether voltage and current wiring are correct, and whether there are issues such as phase misconnection or reversed polarity.
Distribution systems: Suitable for three-phase phase sequence, voltage, current, and phase detection on distribution cabinets, distribution lines, and other equipment.
Industrial power: Can be used for routine inspection, maintenance, and fault diagnosis of factory power distribution systems, electrical equipment, and three-phase lines.
Power construction and maintenance: Suitable for on-site wiring verification after new equipment installation, line retrofitting, equipment commissioning, and maintenance work.
FAQ about Double Clamps Digital Phase Meter
Q: What is the SMG2000E?
A: The SMG2000E is a dual-clamp digital phase meter primarily used for measuring AC voltage, AC current, and the phase difference between different electrical signals. It can also perform phase sequence and electrical wiring checks.
Q: What are the main functions of the SMG2000E?
A: The main functions include AC voltage measurement, AC current measurement, phase difference measurement, phase sequence detection, as well as checks for transformer wiring, differential protection systems, and energy meter wiring.
Q: What are the main advantages of the SMG2000E?
A: Its core advantage lies in combining voltage and current measurement with phase relationship detection. The dual-clamp design enables quick comparison of electrical parameters between different circuits, making it particularly suitable for on-site wiring verification and fault diagnosis.
Q: Which industries is this device suitable for?
A: It is mainly suitable for power utilities, power plants, substations, distribution rooms, power construction contractors, relay protection and energy metering departments, as well as for power distribution system testing in large industrial enterprises.
