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HF-CH-208 Cable Sheath Fault Locator
The Cable Sheath Fault Locator is professional portable testing equipment for power systems. It quickly detects and accurately locates damages, punctures and breakdown points on underground high-voltage cable outer sheaths. It helps power crews repair faults efficiently, prevent cable corrosion and extend the service life of buried power cables.
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This professional testing instrument is specially developed to detect and pinpoint breakdown faults on the outer protective sheath of buried power cables. Equipped with three core positioning working modes — step voltage, fault current and high-voltage probe DC voltage detection, it delivers flexible fault searching for diverse site conditions.
In step voltage mode, it clearly shows the fault direction with high sensitivity and wide response coverage for quick ground pinpointing. The fault current mode captures resistive current inside faulty cables to complete sectional fault positioning efficiently. The high-voltage probe mode measures DC voltage on cable surfaces to rapidly lock fault positions.
Compact, reliable and easy to operate, the device greatly shortens troubleshooting time for cable sheath damages, widely applied in power distribution networks, municipal cable projects and industrial power systems for routine cable maintenance and emergency fault repair.
Product Features
- In the step voltage positioning mode, the cable outer sheath fault tester directly indicates the direction of the fault point, enabling rapid fault location.
- Under the fault current positioning mode, the instrument measures the resistive current inside the faulty cable to realize sectional positioning of the fault point.
- Via the high-voltage probe positioning mode, the cable outer sheath fault tester detects DC voltage on the faulty cable for fast pinpointing of faults.
- The step voltage locator boasts high sensitivity and a wide response range.
Technical Specifications
| Mode / Parameter | Attached Accessories | Signal Accuracy | Maximum Sensitivity | Maximum Input Range | Display Functions |
|---|---|---|---|---|---|
| Step Voltage Positioning | Step Voltage Probe | 1% (±0.1mV) | 0.1mV | ±300V | Signal waveform, fault point direction |
| Fault Current Positioning | Current Sensor | 1% (±1mA) | 1mA | ±1A | Signal waveform, fault current magnitude |
| High-Voltage Probe Positioning | High-Voltage Probe | ＜1% (10V–10kV) | 1V (10V–1kV) 10V (1kV–10kV) | ±10kV | DC Voltage |
Other Parameters
| Item | Specification |
|---|---|
| Built-in Battery | 18650 lithium battery, rated 3.7V, 6.8Ah |
| Operating Conditions | Temperature: -10℃ ~ 40℃; Humidity: 10%~90% RH; Altitude: ＜4500m |
| Receiver Dimension & Weight | Size: 220mm×125mm×55mm; Weight: 0.9kg |
Packing List: Cable Sheath Fault Locator
| No. | Item Description | Qty | Unit | Remarks |
|---|---|---|---|---|
| 1 | Main Receiver Unit | 1 | Set | Built-in rechargeable 18650 lithium battery |
| 2 | Step Voltage Probe Assembly | 1 | Set | For step voltage fault pinpointing mode |
| 3 | Current Sensor | 1 | Pc | Used for fault current sectional positioning |
| 4 | High Voltage Probe | 1 | Pc | DC voltage detection for sheath faults |
| 5 | USB Charging Cable | 1 | Pc | For battery charging |
| 6 | User Operation Manual (English + Chinese) | 1 | Book | Detailed operation & parameter instructions |
| 7 | Calibration Certificate | 1 | Copy | Factory calibration report |
| 8 | Hard Portable Carrying Case | 1 | Pc | Shockproof storage for all accessories |
| 9 | Auxiliary Grounding Wires & Clips | 1 | Set | Auxiliary wiring for field testing |
FAQ for Cable Sheath Fault Locator
Q1: What faults can this cable sheath fault locator detect?
A1: It is designed exclusively to locate insulation breakdown, puncture damage and leakage faults on the outer protective sheath of buried underground power cables. Three working modes support flexible fault pinpointing under various field ground conditions.
Q2: What are the three positioning modes, and when should I use each one?
- Step Voltage Mode: Best for most outdoor soil ground scenarios, directly indicates fault direction with high sensitivity for quick rough positioning.
- Fault Current Mode: Adopts sectional detection via resistive current, ideal for long-distance cables to narrow down fault segments step by step.
- High-Voltage Probe Mode: Detects DC voltage on cable surface, applicable for indoor cable trenches or cables laid on concrete ground.
Q3: What is the maximum input voltage supported by the instrument?
A3: The max input varies by mode: ±300V for step voltage mode, ±1A current input for fault current mode, and up to ±10kV DC for high-voltage probe mode.
Q4: How sensitive is the step voltage detection function?
A4: Its maximum sensitivity reaches 0.1mV with signal accuracy of 1% (±0.1mV), which can capture tiny leakage signals even on dry ground.
Q5: Can this tester work stably in extreme outdoor environments?
A5: Yes. The operating temperature ranges from -10℃ to 40℃, applicable humidity is 10%~90% non-condensing RH, and it can work normally at altitudes below 4500 meters, adapting to most construction sites worldwide.
Q6: What battery is equipped for the receiver, and how long is the working time?
A6: Built-in 18650 lithium battery, rated 3.7V, capacity 6.8Ah. Fully charged battery supports continuous working for 8–12 hours for routine field inspection.
Q7: What are the size and weight of the main receiver? Is it portable for field work?
A7: Receiver dimension: 220mm × 125mm × 55mm, net weight only 0.9kg. Compact and lightweight design greatly reduces carrying burden for field technicians.
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