Buried Cable Fault Locator-XHHD530M
The XHHD530M is a professional-grade buried cable fault detection instrument engineered for power utilities, broadcasting and telecommunications departments, industrial facilities, and rural electrification maintenance teams. It is purpose-built to locate underground cables—including direct-buried armored cable lines—and accurately identify their faults with minimal excavation.
▎Product Overview
The instrument detects cable direction, precise underground position, approximate burial depth, and various fault types including ground leakage faults and broken core faults. It performs reliably across diverse terrain conditions—paddy fields, cement roads, brick and stone surfaces, asphalt roads, and even cables embedded within building walls. Above-ground waterproof wires and cables can also be tested using appropriate detection methods.
The system comprises a signal transmitter, a signal receiver, a probe, insertion rods, and connection accessories. Both transmitter and receiver are compact, structurally optimized, and aesthetically refined. The instrument excels with high sensitivity, superior anti-interference capability via synchronized acoustic-meter indication, convenient single-operator operation, and rapid, accurate fault point localization.
▎Key Features
Dual-Mode Detection
Combines induction method (spatial magnetic field pickup) and insertion method (ground potential difference measurement) in a single instrument, covering the full spectrum of buried cable fault scenarios. |
Built-in KΩ Measurement
Integrated insulation resistance measurement function replaces the need for a separate multimeter or megohmmeter—directly determine fault nature (leakage, broken core, short circuit) before deploying detection. |
Dual-Sensitivity Receiver
High/Low sensitivity switching with synchronized acoustic-meter visual indication ensures clear signal interpretation in both strong and weak signal environments. |
Output 2 High-Current Terminal
Dedicated 1-5A peak pulse output for metallic short-circuit fault detection—enhances effectiveness while minimizing power consumption. |
High Anti-Interference
Received signal remains clear and stable even when operating directly under 220kV high-voltage transmission lines, ensuring reliable detection in power corridor environments. |
Multi-Verification Methods
Supports 17+ field-proven detection and verification techniques including lateral symmetry, cross intersection, equipotential circle, and X-type verification to eliminate false points. |
Extended Detection Range
Effectively detects faults up to 3km in cable length with practical field experience exceeding 1-5km at burial depths of 2-3 meters. |
Portable Field-Ready Design
Complete kit weighs approximately 5kg in a rugged transport case—deployable by a single operator with minimal setup time. |
▎Technical Specifications
Transmitter
| Parameter |
Specification |
| Output Signal Form |
Pulse period 1.34 ± 0.15ms, width 0.2 ± 0.1ms, intermittent period 1.8 ± 1s |
| Output Voltage (High Range) |
> 1000Vp-p |
| Output Voltage (Medium Range) |
> 60Vp-p |
| Output Voltage (Low Range) |
> 30Vp-p |
| Output 2 Terminal |
Peak pulse short-circuit current 1-5A |
| Pulse Power |
> 2.5W (at high-range load 80kΩ) |
| KΩ Measurement |
0-∞ range—checks continuity, disconnection, mixing, and ground leakage resistance |
| Power Supply |
8.4V rechargeable battery |
Receiver
| Parameter |
Specification |
| Received Signal Form |
Pulse period 1.36 ± 0.15ms, width 0.2 ± 0.1ms, intermittent period 1.8 ± 1s |
| Sensitivity Settings |
High / Low selectable |
| Indication |
Analog meter (± direction) with synchronized acoustic output |
| Power Supply |
6V (4 x AA battery) |
Detection Performance
| Parameter |
Specification |
| Leakage Fault Accuracy (≤500kΩ) |
< 0.2m (insertion method, length ≤3km, depth ≤2m) |
| Broken Core Fault Accuracy |
< 0.4m (length ≤1km, depth ≤2m, good insulation) |
| Practical Detection Range |
Can exceed 1-5km at burial depths of 2-3m in field conditions |
| Anti-Interference |
Reliable operation under 220kV transmission lines |
| Operating Conditions |
Ambient temperature -15°C to +55°C; atmospheric pressure 86-108kPa |
▎Detection Methods
Induction Method — Based on electromagnetic field principles, a pulse signal transmitted into the cable creates a magnetic field in the surrounding space. The probe picks up this spatial field signal, which is amplified by the receiver into both audible sound and visual meter deflection. By monitoring sound intensity and needle swing amplitude, the operator determines cable direction, approximate fault zone, precise underground position, and basic burial depth.
Insertion Method — When a pulse signal is transmitted into a buried line, a regular electric field forms on the ground surface above the cable route and fault point. Two insertion rods measure the potential difference between two points in this distributed field. The receiver amplifies the signal into visual meter deflection (positive/negative direction) and audible output. By observing needle direction and swing amplitude, the precise underground position and exact fault point are accurately determined.
The instrument supports 17+ field-proven verification techniques to eliminate false positives, including: Lateral Symmetry Method, Cross Intersection Method, Equipotential Circle Verification, X-Type Verification, Forward Symmetry Method, Two-Time Positioning Method, Short Distance Method, and Humidification Method for hard surfaces.
▎Packing List
| No. |
Item |
Qty. |
Remarks |
| 1 |
Transmitter |
1 |
Signal source with KΩ measurement function |
| 2 |
Receiver |
1 |
Dual-sensitivity with acoustic-meter indication |
| 3 |
Probe |
1 |
For induction method spatial magnetic field pickup |
| 4 |
Probe Head |
1 |
Replacement probe tip |
| 5 |
Insertion Rods (Red & Black) |
2 |
For insertion method potential difference measurement |
| 6 |
Connection Lines |
2 |
Signal and grounding connection cables |
| 7 |
Charger |
1 |
For transmitter battery |
▎Frequently Asked Questions
Q: What is the difference between the induction method and the insertion method?
The induction method uses a probe to capture the spatial magnetic field generated around the energized cable—ideal for quickly tracing cable direction, estimating burial depth, and locating the approximate fault zone. The insertion method measures ground surface potential differences through two insertion rods, enabling precise fault point location with <0.2m accuracy. Used together, they provide a complete workflow: induction for rough scanning, insertion for pinpoint verification.
Q: How does the built-in KΩ measurement function help in the field?
Before deploying detection, the KΩ measurement function allows the operator to measure insulation resistance between each conductor and ground, directly determining fault type—whether it is a low-resistance ground fault (≤20kΩ), high-resistance ground fault (20-500kΩ), or an insulated broken core fault (>MΩ). This eliminates the need for a separate multimeter or megohmmeter and ensures the correct detection method and transmitter output setting from the start.
Q: Can the XHHD530M detect faults under concrete or asphalt surfaces?
Yes. For hard surfaces such as cement roads, asphalt, brick, and stone, the instrument uses the humidification method—wrapping insertion rod tips with water-soaked material (towels, cloth) to increase ground contact, or watering insertion points along the line. The induction method works without ground contact, allowing initial scanning above any surface type.
Q: How does the instrument handle false signals and phantom fault points?
The XHHD530M supports 17+ verification methods developed from decades of field experience to eliminate false positives caused by T-junctions, corners, crossing underground lines, metal pipes, and uneven burial depths. Multi-method cross-verification ensures the identified fault point is genuine before excavation begins.
Q: What is the maximum detection range and depth?
The instrument is rated for fault detection up to 3km in cable length with 2m burial depth at <0.2m positioning accuracy. In practical field conditions, many users report effective detection beyond 5km at depths of 2-3 meters, depending on soil composition and fault resistance characteristics.
Q: Can the XHHD530M operate near high-voltage power lines?
Yes. The instrument features high anti-interference capability and has been field-proven to deliver clear, stable signal reception even when operating directly under 220kV transmission lines. The synchronized acoustic-meter indication provides dual confirmation unaffected by electromagnetic noise.
Q: What warranty and support is included?
12-month standard warranty against manufacturing defects with lifetime technical support. CE and ISO certified. Each kit includes the transmitter, receiver, probe, insertion rods, connection cables, charger, and user manual in a rugged transport case. On-site training and extended warranty options are available upon request.
▎After-Sales Service
12-month free warranty for product quality issues, lifetime maintenance and technical support. CE and ISO certified. Technical inquiries are typically answered within 24 hours. On-site commissioning and operator training are available upon request.
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