ARC Cable Fault Pre-Locator for 35kV Cables | 12.1-inch 400MHz 68km | XHGG501A2
Engineered for 35kV and Below — The Utility Standard. The XHGG501A2 targets the voltage range that covers 90%+ of installed power cable infrastructure: 6kV, 10kV, 11kV, 20kV, 33kV, and 35kV distribution and sub-transmission cables. 400MHz sampling, ≥68km range, ≤10m blind zone.
The XHGG501A2 ARC Cable Fault Pre-Locator is purpose-configured for the medium-voltage power cable networks that form the backbone of utility distribution systems worldwide. With a 12.1-inch industrial touch display, 400MHz real-time sampling engine, and fully automatic continuous waveform acquisition, it accurately locates low-resistance, short-circuit, open-circuit, leakage high-resistance, and flashover high-resistance faults on power cables rated 35kV and below. Three test methods — low-voltage pulse (400V, 0.25/2/4μs triple width), high-voltage flashover, and multi-pulse — ensure coverage of all fault types encountered in medium-voltage cable maintenance. The instrument also calibrates cable length and measures propagation velocity for accurate distance calculation. CE ISO certified.
High-voltage transmission cables (66kV+) are inspected by dedicated transmission-line maintenance teams with specialized equipment budgets. Low-voltage cables (<1kV) are typically short enough for section-by-section isolation testing. The medium-voltage range — 6kV to 35kV — is where the majority of cable fault investigations occur: urban distribution feeders, industrial plant incoming cables, wind farm collection circuits, and substation interconnectors. These cables run kilometers between accessible points, cross under roads and buildings, and carry loads that cannot be shed for extended troubleshooting. The XHGG501A2 is built specifically for this operating environment.
12.1-Inch Touch Display with Physical ControlsThe instrument's human interface combines a capacitive touch screen with dedicated hardware knobs — a deliberate choice for field reliability. When wearing insulated gloves in a 35kV substation, the physical amplitude and displacement knobs allow waveform adjustment without removing gloves or risking touch-screen contamination in wet conditions. The 4-grid LED battery indicator provides instant power status at a glance — no menu navigation required. USB ×2 ports support external keyboard/mouse for office-based analysis and USB flash drives for waveform export. A dedicated self-check button verifies system integrity with a single press before field deployment.
400MHz Sampling with Triple Pulse WidthThe XHGG501A2's 400MHz sampling engine acquires 400 million data points per second — translating to 0.1m reading resolution and <0.5m test accuracy. Three selectable pulse widths optimize the signal for different fault scenarios:
| Parameter | Specification |
|---|---|
| Voltage Rating | Power cables 35kV and below |
| Display | 12.1-inch industrial touch LCD; 4-grid battery LED; physical amplitude/displacement knobs |
| Sampling Frequency | 400MHz; fully automatic continuous sampling |
| Reading Resolution | 0.1m |
| Test Accuracy | <0.5m |
| Test Range | ≥68km; presets: <1km / <3km / >3km |
| Test Blind Zone | ≤10m |
| Measurement Error | ≤±(0.5%×L+1m), L = cable length |
| Pulse Amplitude | 400V |
| Pulse Width | 0.25μs / 2μs / 4μs |
| Test Methods | Low-voltage pulse / High-voltage flashover / Multi-pulse |
| Connectivity | USB ×2; external keyboard/mouse support |
| Self-Diagnostics | Built-in self-check function |
| Battery | 10400mAH lithium; AC 110V~240V, 50Hz/60Hz charging |
| Operating Conditions | -20℃~+65℃; ≤90% RH; 750±30mmHg |
| Compliance | CE, ISO |
| Application | Typical Cables |
|---|---|
| Urban Distribution Networks | 10kV, 11kV, 20kV XLPE underground feeders; PILC legacy cables |
| Industrial Plant Incoming Supply | 33kV, 35kV factory incoming cables; substation interconnectors |
| Renewable Energy Collection | 33kV wind farm collector circuits; solar farm medium-voltage networks |
| Cable Length Calibration | Precise length measurement for cable inventory and project acceptance |
| Pre-Commissioning Testing | New cable installation verification before energization |
Frequently Asked Questions
Q: Where does the XHGG501A2 fit in the XHGG product lineup?
The XHGG501A2 sits between the entry-level XHGG501D (16km, 1.0m resolution) and the professional XHGG502A (120km, 0.07m resolution). It offers a 12.1-inch display with 400MHz sampling, 68km range and ARC multi-pulse technology — delivering professional-grade fault analysis at a mid-range investment level ideal for regional utilities and growing electrical contractors.
Q: What does ARC technology do that standard TDR cannot?
Standard TDR uses low-voltage pulses effective only for low-resistance faults. ARC (Arc Reflection Comparison) extends arc duration at high-resistance fault points during HV discharge, capturing clean echoes across multiple waveform groups. This allows the XHGG501A2 to reliably locate flashover and high-resistance faults — the most common and challenging fault types in 35kV cable networks — without the complex cosine-oscillation interpretation required by traditional methods.
Q: Is the XHGG501A2 suitable for pre-commissioning cable testing?
Yes. The XHGG501A2 is commonly used for pre-commissioning verification of newly installed cables before energization. The LV pulse method measures exact cable length and maps all joint positions, creating a baseline reference. Post-installation, these baselines help quickly identify if any cable section has been damaged during backfilling or construction. The waveform storage function archives these baselines for future comparison.
Q: What external equipment is needed for high-resistance fault testing?
For ARC multi-pulse and HV flashover testing, the XHGG501A2 requires an external high-voltage pulse generator (such as the XHHV535 series) and a pulse coupler rated for the test voltage. These are not included with the tester but are available from XZH TEST as a complete integrated system. For low-voltage pulse testing of open/short/low-resistance faults, no external equipment is needed.
Q: How does the 12.1-inch display improve field workflow?
The larger 12.1-inch screen displays waveforms with greater detail and allows multiple operators to view simultaneously during collaborative fault analysis. Combined with touch and coded-button dual control, technicians can operate with gloved hands in cold or wet conditions. The higher resolution provides better visibility of subtle waveform features like small joint reflections that might be missed on smaller screens.
Q: What warranty and technical support is provided?
Standard warranty covers 12 months from delivery for manufacturing defects, with lifetime technical support. Each unit includes a comprehensive user manual covering setup, all three test methods with wiring diagrams, waveform interpretation guidance, and troubleshooting. Optional on-site training and extended warranty plans are available. Remote support response time is typically within 24 hours.
Request a quotation for the XHGG501A2 — specify your voltage levels and cable types for application-specific guidance.
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