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HF-RT-210 Three-clamp Phase Angle Tester
This portable three-clamp phase angle tester enables live measurement on three-phase power circuits. It precisely detects phase angle, phase sequence, voltage and current, widely adopted for substation wiring inspection and secondary loop commissioning.
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This handheld three-clamp phase angle tester is a dedicated testing instrument for three-phase AC power systems. Equipped with three independent clamp-on CT sensors, it allows live-line measurement without cutting off power supply. The fully isolated input design eliminates risks of short circuits and device damage caused by wrong wiring. It accurately measures phase angle, phase sequence, three-phase voltage, current, power factor and vector diagram. Built with a large high-contrast LCD screen and insulated engineering plastic housing, it delivers stable precision and excellent safety. Widely used for substation secondary circuit commissioning, CT polarity verification, energy meter wiring inspection and on-site power system troubleshooting.
Product Applications
This three-clamp phase angle tester is extensively used for three-phase power system field commissioning and maintenance. It checks phase sequence, verifies secondary circuit wiring correctness, tests CT/PT polarity, measures phase difference, power factor and draws three-phase vector diagrams. Ideal for substation acceptance, watt-hour meter calibration, transformer wiring inspection and industrial electrical fault troubleshooting.
Reference & Operating Conditions
| Influence Quantity | Reference Conditions | Operating Conditions | Remarks |
|---|---|---|---|
| Ambient Temperature | 23℃±1℃ | -10℃ ~ 40℃ | / |
| Ambient Humidity | 40% ~ 60% RH | Less than 80% RH | / |
| Signal Waveform | Sine Wave | Sine Wave | β=0.01 |
| Signal Frequency | 50Hz±1Hz | 45Hz ~ 65Hz | / |
| Instrument Operating Voltage | 3.7V±0.1V | 3.7V±0.5V | / |
| Current Amplitude for Phase & Sequence Measurement | 1A±0.1A | 1mA ~ 20.0A | / |
| Voltage Amplitude for Phase & Sequence Measurement | 100V±10V | 10V ~ 600V | / |
| Current Amplitude for Power & Power Factor Test | 1A±0.1A | 10mA ~ 20A | / |
| Voltage Amplitude for Power & Power Factor Test | 100V±10V | 10V ~ 600V | / |
| External Electric & Magnetic Fields | — | Shall be avoided | — |
| Position of Measured Conductor | — | The conductor shall be placed approximately at the geometric center of the clamp jaw | — |
Product Functions
This three-clamp phase angle tester integrates multiple practical measuring functions for three-phase power systems:
- Simultaneously test three-phase AC voltage, current, phase angle and phase sequence;
- Calculate active/reactive power, apparent power and power factor automatically;
- Check CT polarity, draw three-phase vector diagrams to verify secondary circuit wiring;
- Support live-line measurement via three clamp CTs without power outage;
- Large LCD screen displays all measured data clearly with data hold function.
Packing List – Three-clamp Phase Angle Tester
|
No.
|
Item Description
|
Specification
|
Q’ty
|
Unit
|
Remark
|
|---|---|---|---|---|---|
|
1
|
Three-clamp Phase Angle Tester Host
|
3-phase phase angle, voltage & current testing
|
1
|
Set
|
Main unit
|
|
2
|
Current Clamp Sensor
|
3 pcs (I1 / I2 / I3), matched polarity
|
3
|
Pc
|
Original supporting clamps
|
|
3
|
Voltage Test Lead Set
|
Yellow / Green / Red / Black, 4pcs
|
1
|
Set
|
High-insulation probe wire
|
|
4
|
User Manual
|
English Version
|
1
|
Pc
|
Operation instructions included
|
|
5
|
Calibration Certificate
|
Factory test qualified report
|
1
|
Pc
|
Standard factory document
|
|
6
|
Portable Carrying Case
|
Shockproof & dustproof
|
1
|
Pc
|
For storage & transportation
|
|
7
|
Gift Battery
|
DC 9V
|
1
|
Pc
|
Spare part
|
FAQ – Three-clamp Phase Angle Tester
Q1: What can a three-clamp phase angle tester measure?
A: It can measure three-phase voltage, current, phase angle, phase sequence, power factor, active/reactive power, and display real-time vector diagrams for power system analysis.
Q2: Does it require power off during testing?
A: No power cut is needed. The three clamp sensors support safe live-line clamping measurement without disconnecting the circuit.
Q3: What is the main advantage of three-clamp design vs dual-clamp?
A: It can test three-phase parameters simultaneously in one clamping, faster for wiring verification, vector analysis, and three-phase balance judgment.
Q4: Can it check CT polarity and secondary circuit wiring?
A: Yes. It is widely used for CT/PT polarity test, secondary circuit inspection, and power meter wiring correctness verification.
Q5: Is the instrument safe for field use?
A: Adopting fully insulated isolation design and high-strength engineering plastic shell, it effectively avoids short-circuit risks caused by misoperation.
Q6: What working frequency range does it support?
A: It adapts to 45Hz–65Hz power frequency signals, suitable for conventional three-phase power distribution systems.
Q7: Who is this tester for?
A: Ideal for electric power maintenance, substation commissioning, electrical engineering acceptance, and industrial three-phase circuit troubleshooting.
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