The TFN DG15M Cable Fault Tester is a high-precision, multi-functional diagnostic instrument designed for locating faults in underground power cables up to 10 KV. It integrates three independent testing channels—Length Measurement, Leakage Detection, and Path Tracing into one device. It performs well even under high-voltage lines or in cable trenches, ensuring accurate fault localization in complex electromagnetic environments. Ideal for utility maintenance, municipal lighting, industrial power systems, and agricultural irrigation networks.
Product Features
✅ High Anti-Interference Design
The DG15M features a dedicated anti-interference channel with high-performance filtering circuits, allowing stable signal reception even near transformers, high-voltage lines, or within crowded cable trenches. This ensures clear audio cues and accurate fault pinpointing without signal distortion.
✅ All-in-One Multimeter & Signal Generator
Equipped with a built-in digital multimeter and adjustable signal generator (512 Hz–1 KHz), it enables on-site testing of voltage, loop resistance, and insulation resistance. This integrated design eliminates the need for additional tools, streamlining pre-test diagnostics and fault screening.
✅ Dual-Waveform Comparison for Accurate Fault Detection
By displaying faulty and healthy cable waveforms side by side, technicians can instantly spot subtle differences in signal behavior. This makes it easier to locate faults caused by oxidation or partial breakdown.
✅ Three-Channel Versatility for Comprehensive Cable Testing
The DG15M supports a wide range of testing applications, including length measurement, leakage detection, path tracing, and depth estimation. Its three-channel architecture enables both live and de-energized testing, allowing technicians to work efficiently across different field conditions and cable types—including armored cables.
✅ Rugged, User-Friendly Design with Extended Battery Life
The DG15M features a sunlight-readable 480 × 800 color display, responsive tactile buttons, and a high-capacity lithium battery that delivers 6–8 hours of continuous operation. An IP-rated rugged enclosure ensures reliable performance in harsh environments, while the lightweight 2 kg design improves portability for field use.
Spec Sheet
| Distance and Length Measurement | |
| Testing Range | 8,000 m (customizable) |
| Dead Zone | 0 m |
| Resolution | Minimum 0.5 m |
| Pulse Width | 96 ns – 10 μs, auto-adjusting |
| Testing Modes | Automatic testing and manual analysis |
| Leakage and Route Location | |
| Leakage Fault | Insulation Resistance Range 0–0.5 MΩ |
| Location Error | ≤ 1 m |
| Cable Depth | ≥ 3 m |
| Detection Range | 8,000 m |
| Route Accuracy | ≤ 0.2 m |
| Signal Generator | |
| Signal Output | 512 Hz / 1 kHz adjustable |
| Multimeter Functions | AC/DC voltage, insulation resistance, cable loop resistance |
| Dimensions (W × D × H): | 220 × 160 × 90 mm |
| Weight | 2 kg |
Where It's Used
- Power system: Troubleshooting of high and low voltage underground cables of 10kV and below.
- Communication network: Maintenance of power cables and communication cables of tower communication base stations.
- Municipal engineering: path finding and fault location of street light lines and traffic signal lines.
- Agricultural irrigation: inspection and maintenance of underground cables in farmland irrigation areas.
Package Content
- DG15M Host
- Signal Generator with Multimeter
- Path Tracing Probe
- Leakage Detection Probe Rods
- Test Leads for Length Measurement
- Headphones
- Grounding Rod
- Dedicated Charger × 2
- Instrument Carrying Case × 2
- User Manual & Quick Guide
- Warranty Card & Certificate