The TFN FB18 Cable Fault Tester is designed for precise detection, localization, and analysis of faults in power cables up to 35 kV. This all-in-one solution combines four specialized units: a fault ranging host, a path detector, a pinpoint locator, and a high-voltage signal generator. It employs cutting-edge Time Domain Reflectometry (TDR) and electromagnetic induction technologies to accurately identify open circuits, short circuits, high-impedance leaks, and flashover faults in underground or buried cables.
Product Features
✅ Multi-Function Cable Fault Testing with High-Precision Ranging
The FB18 system detects all common cable faults—including low/high resistance, short circuits, open circuits, and flashovers—in cables up to 35 kV. Powered by advanced TDR technology with sampling rates up to 200 MHz, it delivers distance accuracy better than 50 cm and a maximum test range exceeding 50 km. Fault waveforms and distances are displayed automatically, enabling fast and reliable fault analysis with minimal operator intervention.
✅ Intelligent Cable Path Tracing & Identification
Equipped with an advanced path detector, the FB18 accurately traces underground cable routes and identifies target cables within bundled lines. Supporting direct connection, coupling clamp, and induction modes across frequencies from 577 Hz to 133 kHz, it works on both energized and de-energized cables. Clear visual indicators and audio guidance help locate cable paths and measure depth up to 6 m, reducing the risk of accidental damage during excavation.
✅ Precise Pinpoint Fault Location via Acoustic-Magnetic Method
For exact fault localization, the FB18 includes a dedicated pinpoint locator using proven acoustic-magnetic synchronization technology. It filters ambient noise, displays fault distance (up to 25 m), and intelligently suppresses headphone volume between discharge pulses. This allows technicians to accurately pinpoint the fault location and minimize unnecessary excavation.
✅ Compact & Safe High-Voltage Signal Generation
The integrated high-voltage generator delivers stable DC output up to 32 kV for fault pre-location and withstand voltage testing. Weighing only ~15 kg, it replaces bulky traditional test transformers while offering over-current protection, short-circuit protection, voltage pre-setting, and clear status display—ensuring safe and efficient field operation.
✅ Field-Ready Design & Data Storage
Designed for on-site use, the FB18 features an 8-inch color touchscreen, simple controls, and long battery life. Test data and waveforms can be stored locally for later analysis or reporting. Built for durability, the system operates reliably in environments from -10°C to +45°C, making it suitable for demanding field conditions.
Spec Sheet
| Units | Key parameters |
| Distance measuring host | Test method: low voltage pulse method, high voltage flashover method Test distance: >64 km System accuracy: <50 cm Display: 8-inch color LCD touch screen Sampling rate: 100 MHz |
| Smart locator | Fixed distance display: 0 – 25 meters Fixed error: Audio test accuracy 0.1 m Display: 4.3-inch OLED color LCD screen Battery life: about 7 hours |
| Path Finder | Detection depth: 0 – 6 m and above Positioning accuracy: 5% of depth (0-3 m) Transmitter battery life: >12 hours (energy saving mode) Operating frequency: 577 Hz – 133 kHz multi-speed adjustable |
| High voltage generator | Working mode: continuous pulse, DC, single pulse Power supply: battery/mains power |
Where It's Used
- Power industry: Fault repair and routine maintenance of 35kV and below transmission and distribution cables.
- Municipal transportation: path finding and fault location of street light cables and traffic signal cables.
- Industrial and mining enterprises: maintenance of power cables within the factory area.
- Community gardens: troubleshooting of underground cables in residential areas and park green belts.
Package Content
- Fault Ranging Host Unit (1 unit)
- Path Detector Unit (1 Transmitter, 1 Receiver)
- Fault Pinpoint Locator Unit (1 unit)
- High-Voltage Signal Generator (1 unit)
- Essential Accessories:
Test leads with clips for the ranging host.
Direct connection leads and grounding stake for the path detector transmitter.
Coupling clamp for the path detector.
Acoustic pickup sensor (earphone) for the pinpoint locator.
Step Voltage A-Frame for the pinpoint locator.
Current sampler for flashover method.
High-voltage pulse capacitor and discharge sphere gap for the HV generator.
Dedicated discharge rod and grounding cable for safety. - Power Supplies & Connectivity: Battery chargers for all battery-operated units, communication cables (if applicable).
- Documentation & Storage: User manuals (hard copy/electronic), protective carrying cases or a rugged system transport case for all components.