Cable Fault Locator 10.1 Inch Touchscreen Cable Fault Pre-locator Traveling Wave Distance Tester | XHGG502A
XHGG502A is a portable cable fault pre-locator (cable fault tester) for measuring and analyzing the condition and fault distance of power cables. Using an industrial-grade 10.1 inch touchscreen all-in-one computer, it combines signal filtering, acquisition, data processing and graphical waveform analysis to complete cable wave velocity measurement, cable length testing and cable fault distance testing, and it works with the supplied pulse coupler for the multiple pulse method.
| Parameter | Specification |
|---|---|
| Model | XHGG502A |
| Product Type | Cable fault pre-locator / cable fault tester (with pulse coupler) |
| Test Methods | Low-voltage pulse method, high-voltage flashover method, multiple pulse method (8 pulses, with coupler) |
| Display | 10.1 inch full-color TFT touchscreen (1024x600, 280 nits) |
| Sampling Frequency | 1MHz to 400MHz |
| Distance Measurement Range | ≥120 km |
| Test Range | 100m / 300m / 500m / 1km / 3km / 5km / 10km / 25km / 50km / 100km |
| Minimum Resolution | 0.07 m |
| Test Blind Zone | ≤10 m |
| Measurement Error | ≤ ± (0.5% × L + 1 m), L = cable length |
| Low-voltage Pulse Amplitude | 300V ±15% |
| Pulse Width | 0.1uS / 0.30uS / 0.60uS / 1.20uS / 2.4uS / 5.0uS / 7.5uS / 10uS |
| Pulse Coupler Withstand Voltage | DC 35kV |
| Power Supply | Rechargeable AC110V~240V, 50Hz/60Hz; built-in 11.1V lithium battery |
| Charging / Working Time | Charge about 2 hours, work over 5 hours |
| Waveform Storage | Over 8000 low-voltage pulse & high-voltage flashover records, over 250 multiple pulse records |
| Operating Conditions | Temperature -20℃~+65℃, relative humidity 90% |
| Protection Class | Chassis with minimum IP54 rating |
The instrument adopts the traveling wave method. When an electromagnetic wave travels along a cable and meets a non-uniform point where the characteristic impedance changes, a reflected wave returns to the test end. The polarity of the echo differs between a short-circuit point and an open-circuit point, so the fault distance can be determined from the reflected waveform.
Low-Voltage Pulse MethodA low-voltage pulse signal is applied to the cable under test, the reflected signal at the fault point is processed, and the coarse fault distance is read directly from the reflected waveform. It is used for low-resistance, short-circuit and open-circuit faults.
High-Voltage Flashover MethodFor high-resistance flashover faults, a DC high voltage (or impulse) is applied to the cable until the fault point flashes over, generating a reflected signal that is picked up by the sampler and sent to the tester, so leakage and flashover high-resistance faults can also be located.
Multiple Pulse Method with CouplerWhen used with the supplied pulse coupler, the multiple pulse method displays 8 sets of high and low voltage waveforms for easy comparison, making the fault echo much easier to identify on site. The pulse coupler withstands up to DC 35kV.
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