Portable 10-inch TDR Cable Fault Locator | 16km 100MHz IP54 | XHGG501D

The XHGG501D is a portable TDR-based cable fault pre-locator designed for rapid on-site diagnostics. With a 10-inch touch LCD, 100MHz real-time sampling, and MCU single-chip centralized control, it eliminates the complexity associated with laboratory-grade instruments. Operators connect the test leads, select the range preset, and press start — the instrument automatically acquires, samples, and processes the waveform to determine fault distance. Supporting both low-voltage pulse and flashover sampling methods, the XHGG501D covers low-resistance faults, open circuits, short circuits, leakage high-resistance faults, and flashover high-resistance faults across power cables, control cables, communication cables, and street light wiring. Built into an IP54 protective chassis and powered by a field-swappable lithium battery, it is the instrument of choice for utility maintenance crews, electrical contractors, and field service engineers who need reliable results without the learning curve.

Most cable fault locators assume a controlled environment: stable power, a workbench, and a trained operator with time to configure. The XHGG501D assumes the opposite — a rain-soaked trench at 5:30 PM, fading daylight, and a crew waiting for clearance. Here is what a typical deployment looks like:

No laptop. No external software. No specialist training. The instrument does the heavy lifting — the operator reads the distance and directs the digging crew.

Many "portable" cable fault testers ship with a 4.3-inch or 5-inch resistive screen that requires a stylus and assumes indoor lighting. The XHGG501D uses a full 10-inch TFT LCD — the same class of display found on tablet computers — with touch operation that works with gloved hands. This is not just about aesthetics:

• Full-Waveform Visibility: On a 5-inch screen, a long-range waveform is compressed to the point where the fault reflection spike is a few pixels wide. On the 10-inch display with 100MHz sampling data, operators can visually identify the fault inflection point without relying solely on the auto-analysis algorithm. When the algorithm flags a borderline reflection — common on aged cables with multiple joints — the operator can visually confirm or override the automated reading.
• Dual-Mode Control: Touch screen for rapid navigation through menus and presets; physical coded buttons for precise cursor positioning when measuring the fault waveform. Two operators can work simultaneously — one navigating, one measuring — on complex multi-fault traces.
• Sunlight-Readable with Anti-Glare: Industrial-grade LCD with LED backlight maintains visibility at 280nit brightness. Operable in direct sunlight at outdoor substations and roadside cabinets without a shade cover.

The XHGG501D samples at a true 100MHz — 100 million data points per second — without software interpolation. This matters at short range: when testing a 300m cable with a 0.1μs narrow pulse, the instrument achieves 0.5m minimum resolution, sufficient to distinguish a fault at a cable joint from a fault inside the joint itself. The auto-ranging system continuously adjusts gain and sampling depth, capturing the reflection pulse regardless of whether it arrives at 0.2μs (near-end fault) or 80μs (far-end fault). Combined with a ≤20m blind zone — one of the best in its class — the XHGG501D reliably detects faults from the output terminals outward.