Precision in Power Networks: The Wrindu Cable Fault Locator System (Trolley Type)

In modern power distribution networks, cable integrity is essential for ensuring stable electricity delivery and preventing costly downtime. Faults in underground or buried cables—whether caused by insulation breakdown, mechanical damage, or high-resistance leakage—can disrupt entire systems. Detecting these faults swiftly and accurately has become a cornerstone of electrical maintenance. The Wrindu Cable Fault Locator System (Trolley Type, Model RDCD-Ⅱ) embodies this precision and reliability. It fuses advanced power electronics, intelligent automation, and professional engineering into one solution designed for testing and diagnosing cable faults up to 35 kV.

Revolutionizing Fault Detection Technology

The RDCD-Ⅱ marks a leap forward in the evolution of cable fault detection. Built upon years of improvement and innovation, it integrates modern power electronic technology with a fully digital platform. Unlike traditional analog devices, which rely on manual interpretation and multiple instruments, the Wrindu system combines pre-location, pinpointing, and path detection into one coherent trolley structure. Engineers can quickly determine fault types, paths, and distances, whether the issue is a short circuit, open circuit, or high-resistance insulation failure.

This system is composed of four modules, each optimized for a specific stage of fault finding:

Together, these modules form a comprehensive testing ecosystem that simplifies fault analysis and boosts diagnostic efficiency.

Smart Design and Advanced Operation

What distinguishes Wrindu’s RDCD-Ⅱ system is its 12-inch industrial-grade computer, featuring a touch-based Windows interface. This control unit supports automated waveform capturing and data management, automatically saving test results for future viewing. Engineers can generate test reports instantly, calculate fault distances, and compare waveform profiles between cable sections.

Key operational highlights include:

• Automatic continuous waveform sampling, preventing missed discharges.

• Multiple testing methods: low-voltage pulse, high-voltage flashover, and multi-pulse.

• Simultaneous display of open-circuit and fault-point waveforms for enhanced accuracy.

• Polymer lithium battery supporting over four hours of continuous testing.

• Massive waveform storage and retrieval with organized time sequencing.

This focus on functionality and efficiency makes Wrindu’s system highly practical for both field testing and laboratory analysis.

The Power Modules in Detail

RDCD-Ⅱ/502 Cable Fault Pre-locator

Operating with sampling rates of up to 240 MHz and a signal amplitude of 400 Vpp, the pre-locator can detect faults at distances of up to 60 km with a reading resolution of 0.1 m and accuracy within 0.5 m. It supports different testing ranges—short (<1 km), medium (<3 km), and long (>3 km)—and withstands up to 38 kV DC. This unit simplifies fault representation by displaying both fault and open-circuit waveforms simultaneously.

RDCD-Ⅱ/535T Cable Test High-Voltage Signal Generator

This module supplies controlled impulse voltages up to 32 kV, with three selectable capacitor stages—4 μF, 16 μF, and 64 μF. With a total energy discharge of 2048 J, it simulates high-voltage faults for accurate tracing. Its automatic discharging sequence runs for about five seconds, yet manual control allows flexible operation under complex conditions.

RDCD-Ⅱ/503D Cable Fault Locator

Equipped with both acoustic and magnetic detection channels, this unit uses synchronized timing to pinpoint fault locations with an accuracy of ±0.1 m. The operator can filter frequencies (100–1500 Hz) and apply Background Noise Reduction (BNR) for clearer readings. Acoustic intensity and magnetic strength are displayed in real time, along with directional cues for left-right guidance on the cable path.

RDCD-Ⅱ/507 Underground Pipeline Detector

The final link in this intelligent chain identifies cable routes and depths—displaying current, voltage, and signal strength with FM tone feedback. Detection depth reaches up to 10 meters, and the maximum measurable cable distance extends to 15 km under direct connection mode. With selectable low to radio frequencies, operators can adapt the test mode (direct, coupling, or induction) to fit site conditions and soil conductivity.

Integration and Accuracy

The RDCD-Ⅱ system’s efficiency lies in how it merges fault detection, distance measurement, and path tracing within a unified interface. Its multi-pulse, flashover, and low-voltage pulse testing options provide flexibility for different cable configurations—including power cables, telephone lines, streetlight feeds, and buried conductors. The device’s stable high-resolution waveforms help identify even subtle fault reflections that earlier systems might miss.

The following table highlights the system’s precision benchmarks:

This powerful data acquisition capability ensures that Wrindu engineers and field operators can tackle fault analysis with clarity and confidence, reducing troubleshooting time dramatically.

Wrindu Expert Views

“Fault location in modern power systems is a race against time. Any delay risks energy losses and safety hazards. The Wrindu RDCD-Ⅱ revolutionizes that process with multi-technology integration—pulse testing, acoustic-magnetic synchronization, and intelligent waveform processing. This system removes the guesswork from cable diagnostics and delivers rapid, data-driven accuracy, even under difficult field conditions. It is the result of Wrindu’s deep commitment to precision, safety, and reliability for global power infrastructure.”

Durability and Field Adaptability

Durability defines every component of the trolley system. Designed for field environments ranging from -25°C to +55°C, the units perform reliably under high humidity (up to 90% RH) and at altitudes below 4500 meters. The battery-powered operation allows for full portability, while automatic data synchronization prevents data loss during tests.

The trolley structure itself ensures easy maneuverability and safe storage of all four modules—a thoughtful design for substation teams and on-site maintenance engineers who need both mobility and performance.

Why Choose Wrindu RDCD-Ⅱ

• High precision: Measures cable fault distance with centimeter-level accuracy.

• Multi-function capability: Combines locating, path tracing, and waveform comparison.

• Portable and modular: Designed for field conditions.

• Enhanced safety: Overcurrent protection and embedded high-voltage resistors.

• Automated reporting: Windows-based system support for real-time results.

• Global reliability: Backed by Wrindu’s world-class R&D and manufacturing expertise.

Wrindu’s decades of research and commitment to quality control ensure that the RDCD-Ⅱ remains one of the most trusted cable diagnostic systems in the global market.

Conclusion

The Wrindu Cable Fault Locator System (Trolley Type, RDCD-Ⅱ) transforms cable fault detection from a reactive process into a proactive science. By integrating advanced signal processing, multi-method testing, and intelligent automation, it empowers engineers to diagnose faults faster, more precisely, and more safely. As infrastructure networks grow more complex, well-designed diagnostic solutions like Wrindu’s ensure reliability at the heart of every system.

Key takeaway: Wrindu continues to redefine electrical testing—unifying innovation, usability, and precision to meet the evolving demands of modern energy systems.

FAQs

1. What voltage range is supported by the Wrindu RDCD-Ⅱ system?
It can test and locate faults in cables operating at voltages up to 35 kV.

2. What are the main advantages of the trolley design?
The trolley provides convenient transport, integrated module storage, and improved fieldwork mobility.

3. How accurate is the fault distance measurement?
The system achieves a distance accuracy of up to ±0.5 m, even for long-distance cables.

4. What types of faults can the system detect?
It can identify open circuits, short circuits, low resistance, high-resistance flashover, and insulation leakage faults.

5. Is this system suitable for telecommunications or streetlight cables?
Yes. Besides power cables, the RDCD-Ⅱ is compatible with coaxial, telephone, and streetlight cables as well as buried conductors.