Cable Fault Pre-locator XHGG502A (Rugged IP54 Design, ARC/Multi-pulse Method; Resolution: 0.07m, Range: 120km)

The XHGG502A ARC Cable Fault Pre-Locator is engineered for the reality of field operations — dust, moisture, temperature extremes, and the pressure to diagnose faults quickly with minimal downtime. Built into an IP54-rated protective chassis and powered by an 11.1V lithium battery pack with 2-hour fast charging that delivers over 5 hours of continuous operation, it combines 0.07m ultra-high-resolution fault pre-location with the ruggedness required for substations, cable trenches, and outdoor test environments where instruments are subjected to the elements daily.

At its core, the XHGG502A deploys an 8-pulse (multiple-pulse) ARC method through a DC 35kV pulse coupler, converting complex high-resistance fault waveforms into easily interpretable short-circuit equivalent traces. An embedded system with a 10.1-inch sunlight-readable TFT touch display (280nit, 1024×600) provides dual-mode operation — touchscreen for software navigation and coded push-buttons for gloved-hand control in wet or dirty conditions. The instrument also supports conventional low-voltage pulse (300V, 8 selectable widths) and high-voltage flashover methods, covering the complete fault spectrum from zero-ohm shorts to flashover high-impedance failures.

• IP54 Protective Chassis: Dust-protected and splash-proof — survives cable trenches, dusty substations, and light rain. The minimum IP54 rating is verified against GB/T 18268.1 industrial site immunity standards.
• 2-Hour Fast Charge, 5+ Hour Operation: Built-in 11.1V lithium battery pack charges from empty to full in approximately 2 hours and sustains over 5 hours of continuous testing. Dual AC/DC — plug into AC 110V~240V mains or run on battery alone.
• -20℃ to +65℃ Operating Range: From winter substation maintenance in sub-zero conditions to summer cable trench diagnostics under direct sun — the XHGG502A keeps working when lesser instruments fail.
• Touch + Coded Button Dual Operation: Capacitive touch for navigating menus and analyzing waveforms in fair weather. Physical coded push-buttons for reliable control with wet gloves, in dusty environments, or when the screen is splashed.
• 280nit Sunlight-Readable Display: 1024×600 resolution with ultra-bright LED backlight. View full waveform traces clearly even under direct midday sunlight — no screen hood required.
• Embedded System — No Windows Overhead: Purpose-built embedded architecture with no unnecessary OS components. Faster boot, greater stability, lower power consumption, and no software licensing concerns.

• 0.07m Ultra-High Resolution: 400MHz variable sampling rate delivers industry-best 0.07m minimum resolution. Pinpoint faults within the length of a single cable joint — dramatically reducing excavation scope and repair costs.
• ≥120km Maximum Range with 10 Presets: 10 selectable test ranges from 100m to 100km, plus ≥120km maximum capability. Match the range preset to your cable length for optimal waveform clarity without manual configuration.
• 8 Pulse Widths (0.1μs–10μs): Precisely matched to fault distance and cable type. 0.1μs for sub-kilometer high-resolution; 10μs for maximum penetration on long transmission cables.
• 8-Pulse ARC Multi-Pulse with DC 35kV Coupler: Eight sequential pulses through the included coupler (430×380×220mm, 10kg, DC 35kV rated). Simultaneous display of 8 groups of high-voltage and low-voltage comparison waveforms. Automatic distance calculation with manual analysis override.
• ≤10m Test Blind Zone: Industry-leading blind zone performance — detects faults as close as 10 meters from the test terminal, minimizing the gap between pre-location and pinpointing.
• 8000+ Waveform Records, USB Export: Store more than 8,000 low-voltage pulse and high-voltage flashover records and 250+ multi-pulse records with Chinese/English naming. USB communication enables waveform file transfer to PC for archival management, comparative diagnostics, and formal report generation.

The XHGG502A's embedded software includes reference waveform templates for the most common cable fault scenarios, enabling operators to compare field traces against known signatures for rapid identification:

• Open Circuit Fault: Reflected pulse polarity matches transmitted pulse; distance calculated from time delay
• Low-Impedance / Short-Circuit Fault: Reflected pulse polarity opposite to transmitted pulse; sharp negative transition
• Full-Length Cable & Intermediate Joint: Positive reflection at cable end; smaller reflections at splice and joint locations
• Wave Velocity Calibration: Known-length reference trace for accurate propagation velocity measurement in each cable type
• Flashover Waveform: Full-view flash discharge signature with characteristic damping envelope

12-month free warranty against product quality defects from date of purchase. Lifetime maintenance and technical support services. Each XHGG502A ships complete with: pre-locator host, DC 35kV pulse coupler, test lead set, AC power adapter/charger, USB communication cable, rugged transport cases (host + coupler), user manual, and warranty certificate.

Frequently Asked Questions