Product Introduction
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.Double Clamps Digital Phase Meter is a high-precision, low-cost, handheld dual channel input measuring instrument designed specifically for on-site voltage, current, and phase measurements. With this instrument, it is easy to measure the phase between u-u, i-i, and u-i on site, distinguish the phase sequence and three-phase voltage of sensitive circuits and capacitor circuits, detect the wiring group of transformers, test the secondary circuit and bus differential protection system, read the phase relationship between each differential protection group CT, and check the wiring of the electricity meter. Clamp type current transformers are used to input the measured current, so there is no need to disconnect the measured line. When measuring the phase between u1-u2, the two input circuits are completely insulated and isolated, thus completely avoiding the possibility of short circuiting the measured circuit due to wiring errors and burning out the measuring instrument. The display screen adopts a high contrast LCD screen, with text up to 25mm, and the screen angle can be freely converted to around 70 ° to achieve the best visual effect.
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Product functions
1. Dual-channel phase measurement
Supports phase measurement between two voltages, two currents, and voltage-to-current, covering a 0–360° phase angle range, helping to quickly determine the phase relationship between different electrical signals.
2. AC voltage measurement
Supports multi-range AC voltage measurement, up to 500V AC, suitable for voltage detection on power lines, three-phase systems, and transformer primary/secondary sides.
3. AC current measurement
Equipped with dual clamp-on current transformers for non-contact current measurement on the circuit under test, without the need to disconnect or interrupt the line, making it convenient for rapid on-site testing.
4. Three-phase phase sequence detection
By measuring the phase relationship between three-phase voltages, it can quickly determine positive sequence, negative sequence, and phase loss conditions in three-phase systems, suitable for electrical equipment installation and maintenance.
5. Transformer connection group detection
By measuring the phase relationship between the high-voltage and low-voltage side voltages of a transformer, it can assist in determining the transformer connection group and phase relationship.
مواصفات المنتج
1、Withstand Voltage:
Between voltage input terminal and case: 500V/50Hz AC (1 min)
Between current transformer (clamp) core, handle, and secondary winding: 1000V/50Hz AC (1 min)
Between two voltage input terminals: 500V/50Hz AC (1 min)
2、Insulation Resistance:
Between lines and enclosure / two voltage inputs: ≥10 MΩ (measured with digital dual-clamp phase volt-ammeter)
معلمات المنتج
Reference to working conditions
| Influence quantity | Benchmark conditions | ظروف العمل |
| درجة الحرارة المحيطة | 23℃±1℃ | ＜80% |
| الرطوبة المحيطة | 40%～60% | 10℃～40℃ |
| Signal waveform | Sine wave β= zero point zero five | Sine wave β= zero point zero five |
| Signal frequency | 50 هرتز ± 1 هرتز | 45Hz～65Hz |
| Instrument operating voltage | 9V±0.1V | 9V±1V |
| Voltage amplitude during phase measurement | 100V±20V | 30V～500V |
| Current amplitude during phase measurement | 1A±0.2A | 10mA～20.00A |
| External electric and magnetic fields | Avoid | |
| Location of the tested wire | The measured wire is at the approximate Centroid of the jaw | |
General specifications
| Function | Direct testing of phase, AC current, AC voltage, AC leakage current, and phase sequence; Transformer group, inductive and capacitive circuit discrimination; Power factor and power indirect testing |
| مزود الطاقة | DC9V alkaline Dry cell (1.5V LR6 × 6) |
| Working current | Turn on the backlight, with a maximum of 35mA and the battery working continuously for about 15 hours |
| Turn off the backlight, the instrument consumes approximately 5mA of power, and the battery operates continuously for approximately 100 hours | |
| وضع العرض | LCD display, white screen backlight function, suitable for dim places |
| LCD Size | 70mm×62mm ；Display Domain：64mm×54mm |
| Instrument size | Length, width, and thickness: 196mm × 92mm × 54mm |
| Sample Rate | About 3 times/second |
| يتراوح | AC voltage: 0-20V/200V/500V |
| AC current: 0-200mA/2A/20A | |
| Phase: 0-360 ° | |
| The amplitude range of the measured signal during phase measurement | When measuring U1-U2 phase: 30V~500V |
| When measuring I1-I2 phase: 10mA~10.00A | |
| When measuring U1-I2 or I1-U2 phase: 10V~500V, 10mA~10.00A | |
| Data hold | During the test, press the HOLD key to maintain the data, and the "DH" symbol is displayed |
| Automatic shutdown | After about 15 minutes of startup, the instrument automatically shuts down to reduce battery consumption |
| Voltage detection | When the battery voltage is below 7.8V-8V, replace the battery |
| Instrument quality | The host is approximately 1140g (with battery), and the watch clamp is approximately 170g × 2. Test line approximately 250g |
| Test line length | 1.5m |
| Current clamp wire length | 2m |
| Operation temperature | -10 ℃~40 ℃; Below 80% Rh |
| Storage temperature and humidity | -10 ℃~60 ℃; Below 70% Rh |
| Impedance | The input impedance of each test voltage range is: 1m Ω |
| When measuring the phase of U1U2, the voltage input impedance is 40k Ω | |
| Pressurization | Withstand a sine wave AC voltage of 1000V/50Hz between the instrument circuit and the casing for 1 minute; Test of withstanding a sine wave AC voltage of 500V/50Hz between two voltage input terminals for 1 minute |
| عازلة | ≥ 10m Ω between instrument circuit and casing, and between two voltage input terminals |
| بناء | عزل مزدوج |
Basic error and performance indicators under benchmark conditions
| الجهد االكهربى | 20 فولت | 0.01 فولت | ± (0.5% of range) ° |
| 200 فولت | 0.1V | ||
| 500 فولت | 1V | ||
| حاضِر | 200 مللي أمبير | 0.1mA | ± (0.5% of range) ° |
| 2A | 1 مللي أمبير | ||
| 20 أ | 10mA | ||
| مرحلة | 0～360° | 1° | ±1° |
Application Scenarios
1. On-site substation testing
Used for voltage, current, and phase relationship measurements within substations, assisting in checking the wiring of three-phase systems, CT/PT secondary circuits, and protection circuits.
2. Three-phase circuit phase sequence testing
Used to detect the phase sequence and phase relationship of three-phase power supplies, suitable for electrical equipment installation, commissioning, and maintenance, helping to determine whether there are phase misconnections or reversed phases in three-phase lines.
3. Transformer connection group testing
By measuring the phase relationship between the high-voltage and low-voltage side voltages of a transformer, it assists in determining the transformer connection group and phase relationship, suitable for transformer installation, maintenance, and acceptance testing.
4. Electrical equipment installation and commissioning
After installation of motors, distribution equipment, transformers, and other three-phase electrical equipment is completed, it can be used to check the power supply phase sequence and wiring relationships, assisting in commissioning work before the equipment is put into operation.
5. Power fault diagnosis
When protection misoperation, metering abnormalities, abnormal power factor, or three-phase parameter anomalies occur, the voltage, current, and phase relationships can be compared to help technicians quickly locate wiring and phase-related issues.
FAQ about Double Clamps Digital Phase Meter
Q: What is the SMG2000B mainly used for?
A: The SMG2000B is mainly used for on-site detection of voltage, current, and phase relationships in power systems. It can be applied to three-phase phase sequence testing, transformer connection group identification, CT/PT secondary circuit inspection, relay protection testing, and energy meter wiring verification.
Q: What parameters can this device measure?
A: The device primarily supports AC voltage, AC current, and phase angle measurement, and can determine the wiring and operating status of the power system through the phase relationship between two signals.
Q: Is the device suitable for laboratory use or on-site use?
A: The SMG2000B is primarily designed for on-site use. Its handheld structure, clamp-on current measurement capability, and battery-powered operation make it suitable for inspection and fault diagnosis in substations, distribution cabinets, on-site lines, and electrical equipment.
Q: Why choose our SMG2000B dual-clamp digital phase meter?
A: Choosing our SMG2000B means not only selecting a professional phase measurement device, but also choosing reliable product quality, professional technical support, and stable long-term cooperation services.We can provide the best professional Double Clamps Digital Phase Meter for sales and competitive price.
