Pressure test failure after installation: Immediately after cable installation, the DC withstand voltage test of the outer sheath fails. Where is the fault located? Is it a large-area damage or a small localized break? It's impossible to know, and acceptance testing is at a standstill. Abnormal leakage current during operation: Routine inspections reveal a continuous decrease in the outer sheath insulation resistance and a gradual increase in leakage current. A potential hazard exists, but the fault point is buried underground or located in complex piping, making traditional methods ineffective for localization. The system continues to operate under constant anxiety. Fault point cannot be found: It's known that the outer sheath is damaged (e.g., by termite infestation or external force), but where exactly is the damage located on the cable? Without an accurate location, large-scale, long-distance excavation and inspection are required, resulting in high costs and extremely low efficiency. Persistent "old problems": Some hidden defects have existed for years, intermittently causing problems, and remain unresolved, becoming a "ticking time bomb" for the long-term operation of the cable system. Facing these challenges of precise fault localization, simply using an insulation resistance meter (megohmmeter) to determine "whether there is a fault" is far from sufficient. You need a professional solution that can answer "where the fault is."
Traditional methods often require multiple sets of equipment, repeated wiring, and extensive testing, resulting in a cumbersome and inefficient process. The XHHG520 cable sheath fault tester innovatively integrates three major functions – preliminary testing, precise localization, and withstand voltage testing – into a single device, covering the entire operation and maintenance process. Function 1: Intelligent "Preliminary Testing" — Rapid Judgment, Narrowing the Scope. For cables several kilometers long, the first step is to efficiently determine the nature of the fault and its approximate location. How it works: Based on a highly stable bridge principle, the device automatically performs preliminary measurements and calculations. What it solves: Quickly answers the question "How far is the fault from the starting point?", narrowing the investigation range from "the entire line" to "a specific section," avoiding blind efforts. Function 2: Precise "Localization" — No Blind Spots, Direct to the Problem. After determining the approximate range, meter-level precision localization is needed to guide excavation and repair. Core advantage: Completely eliminates detection blind spots, achieving precise distance measurement even for short cables or faults near the ends, which are challenging for other methods. Adjustable sensitivity: Adapts to noisy field environments, accurately capturing fault signals. Manual/Automatic dual mode: Provides the convenience of one-click automatic testing while retaining the freedom of manual fine-tuning, meeting the advanced operational needs of experienced technicians. Function 3: Withstand Voltage Testing — Strength Verification and Maintenance Assurance. During regular inspections, the cable sheath can be subjected to withstand voltage testing. Core value: Built-in DC withstand voltage test unit conforming to the GB50150-2006 national standard, capable of 0-15kV withstand voltage testing. Revolutionary convenience: The "one-click switching" function allows switching between "localization mode" and "withstand voltage mode" without changing equipment, greatly improving work efficiency.
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