The XHGG502A ARC Cable Fault Locator combines a 120km test range with automatic waveform analysis to dramatically simplify the cable fault diagnosis workflow. Built around a 10.1-inch industrial touch-integrated computer with embedded system architecture, it covers the full spectrum of cable fault types — low-resistance short circuits, open circuits, high-resistance leakage, and flashover faults — on power cables, high-frequency coaxial cables, street light cables, and buried wires across all materials, cross-sections, and dielectric media.
What distinguishes this instrument is its dual-mode operation: operators can rely on the fully automatic fault analysis system that handles range setting, waveform capture, and distance calculation with a single setup, or switch to manual waveform analysis for expert-level interpretation on complex fault signatures. The 8-group multi-pulse ARC comparison display provides side-by-side high-voltage and low-voltage waveform views, making fault distance determination unambiguous even for less experienced field technicians.
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| XHGG502A | |
|---|---|
| Test Range | ≥120km (10 selectable: 100m~100km) |
| Minimum Resolution | 0.07m |
| Sampling Frequency | 1MHz~400MHz |
| Measurement Error | ≤±(0.5%*L+1m) |
| Low Voltage Pulse | 300Vpp ±15%; 8 widths: 0.15/0.30/0.60/1.20/2.4/5.0/7.5/10μs |
| Pulse Coupler | DC 35kV |
| Test Modes | TDR, ICE, ARM (8-group multi-pulse) |
| Display | 10.1-inch industrial TFT touch, 1024*600 |
| Waveform Storage | 8,000+ records, USB export |
| Power Supply | AC 110V~240V, 50Hz/60Hz; built-in lithium battery |
| Dimensions / Weight | 358*284*168mm / 4.7kg |
| Operating Environment | -20℃~+65℃; ≤90% RH |
| Compliance | GB/T 18268.1; DL/T 849.1-2019; JJF1042-2020; CE; ISO |
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Q: How does the automatic waveform analysis feature work?
The XHGG502A incorporates intelligent waveform recognition that automatically identifies the transmitted pulse and fault reflection inflection points, calculates the distance, and displays the result. While fully automatic for standard cases, the system also provides manual cursor override for experienced operators who want to fine-tune the analysis on complex waveforms with multiple reflections or joint echoes.
Q: What is the advantage of 8-group multi-pulse over single-pulse testing?
Single-pulse HV flashover produces one waveform that requires expert interpretation due to cosine oscillations. The XHGG502A captures 8 waveform groups in a single test sequence, each representing a different arc reflection comparison. You can instantly switch between groups 1-8 on the display to find the clearest echo, dramatically reducing interpretation time and improving confidence in the measured distance, especially for high-resistance flashover faults.
Q: How is the 120km test range achieved and when is it needed?
The 120km range is achieved through 400MHz maximum sampling frequency combined with 300V low-voltage pulse amplitude and 8 selectable pulse widths (0.1–10μs). Long-range capability is essential for subsea cables, cross-country transmission links, and remote wind farm collector circuits where cable sections can span tens of kilometers. For shorter urban cables, simply select a smaller test range for higher resolution.
Q: What test methods does the XHGG502A support and when should each be used?
Three methods cover all fault types: (1) Low-Voltage Pulse — for open-circuit, short-circuit, and low-resistance faults; also for cable length measurement and wave velocity calibration. (2) High-Voltage Flashover — for leakage high-resistance faults using an external HV pulse generator. (3) ARC Multi-Pulse — for flashover high-resistance faults where the clearest waveform is needed. Start with LV pulse for diagnosis, then select the appropriate HV method based on fault nature.
Q: What accessories are required for complete fault location?
The XHGG502A provides the pre-location (rough distance measurement) stage. For a complete fault location workflow, you will also need: a high-voltage pulse generator (e.g., XHHV535 series) for flashover testing, a pulse coupler for ARC multi-pulse method, and an acoustic-magnetic pinpointer (e.g., 503D) for precise excavation point marking. All XZH TEST components are designed to work together as an integrated system.
Q: How does the XHGG502A handle complex waveforms with multiple joints and reflections?
The XHGG502A provides manual dual-cursor analysis with waveform compression/expansion. For cables with multiple joints, the LV pulse method first maps all joint positions. Then during HV testing, the operator compares joint reflections against fault reflections to isolate the true fault distance. The 8-group multi-pulse display further helps by showing which reflection remains consistent across all groups — that is your fault echo.
Contact us for pricing, technical specifications, or to request a demonstration of the XHGG502A ARC Cable Fault Locator.
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