Tech Analysis of ZX-S10 Integrated Trolley Cable Fault Detector

Cable fault location is a core routine maintenance task in power distribution networks. Conventional separated cable fault testing systems suffer from bulky structure, complicated wiring, complicated operation and high safety risks during field fault diagnosis. This paper introduces the ZX-S10 trolley integrated cable fault tester, an all-in-one portable testing platform developed for power cable fault detection below 35kV. The article systematically elaborates its integrated structural design, multi-mode fault ranging algorithms, core functional advantages, complete technical specifications, and field application scope, providing technical reference for power grid maintenance technicians, cable testing engineers and electrical operation and maintenance staff.

1. Industry Pain Points of Traditional Cable Fault Detection Equipment

Traditional cable fault testing solutions adopt split independent hardware modules: main fault tester, multi-pulse high voltage generator, path locator, pulse transformer, high voltage operation cabinet and energy storage pulse capacitor are separated as individual units. The inherent drawbacks of this separated system are summarized as follows:

Cumbersome on-site wiring brings hidden risks of wiring error, instrument damage and test failure;

Multiple independent equipment units increase carrying workload, and field deployment consumes massive time;

Discrete sampling and single waveform comparison lead to low fault distance measurement accuracy;

Extra external 220V AC power supply is mandatory for high voltage impact operation, restricting testing in power-off field scenarios;

Isolation between high voltage discharge unit and low voltage control terminal is insufficient, exposing operators to electric shock hazards during repeated high voltage regulation.

In response to the above industry bottlenecks, the ZX-S10 trolley cable fault tester integrates all functional modules into a single trolley-mounted unit, realizing one-stop workflow covering fault pre-ranging, cable path tracing, buried depth measurement and pinpoint positioning. It is applicable to all common cable types in power distribution systems, including aluminum-core/copper-core power cables, RF coaxial cables and communication telephone cables with various cross-sections rated under 35kV, supporting full detection of open-circuit, short-circuit, low-resistance and complex high-resistance cable faults.

2. Core Structural & Functional Advantages of ZX-S10 Integrated Trolley Tester

The equipment integrates six core functional units into a sealed trolley chassis, with 14 optimized technical highlights oriented to field maintenance scenarios, detailed as below:

2.1 Highly Integrated Trolley Integrated Architecture

The device integrates the traditional fault tester host, multi-pulse generator, cable path meter, pulse transformer, high voltage control cabinet and pulse energy storage capacitor within one trolley carrier. The integrated design drastically reduces the total volume and weight of the testing system, realizing lightweight and mobile field deployment and eliminating repeated assembly of split devices. Only essential wiring interfaces are reserved on the panel, greatly simplifying field wiring steps and avoiding test failure or hardware damage caused by messy wiring connection errors.

2.2 Three Standard Fault Ranging Sampling Modes with Automatic Waveform Comparison

The tester supports three internationally mainstream fault pre-positioning testing algorithms: low-voltage pulse reflection method, high-voltage flashover method and arc reflection method. It adopts advanced multi-frequency adaptive sampling technology, automatically measuring total cable length, three-phase unbalance damage fault distance and high-resistance fault distance without manual parameter switching. Up to 12 groups of fault reflection waveforms can be displayed and compared on a single capacitive touch screen; the system automatically completes multi-phase fault trajectory comparison, enabling technicians to judge fault point positions intuitively from waveform differences. FPGA+NAD parallel sampling hardware supports a maximum sampling frequency of 450MHz, laying a hardware foundation for ultra-high precision ranging.

2.3 Independent Built-In Power Supply & Off-Grid Field Operation Capability

Different from conventional instruments relying on external 220V mains power, ZX-S10 is equipped with a built-in high-capacity rechargeable battery pack, supporting continuous 4-hour high-voltage impact testing without site AC power access. For long-duration maintenance tasks, the equipment can also be powered by 220V AC mains supply as a backup power mode, adapting to both power-cut field fault rush repair and substation fixed testing environments.

2.4 Safe Remote High-Voltage Control & Automatic Discharge Protection

The high voltage output terminal supports remote switching control. A built-in safety automatic discharge mechanism triggers full discharge after high voltage shutdown, eliminating residual voltage hazards. The integrated LCD touch screen synchronously displays the full high voltage discharge process in real time, allowing operators to monitor voltage changes without approaching the high-voltage discharge unit. Wireless communication isolation is deployed between high-voltage discharge components and low-voltage control circuits, completely cutting off electric shock risks brought by frequent on-site high voltage adjustment. The fully sealed ball gap discharge structure provides continuously adjustable output voltage ranging from 0kV to 40kV with 1kV adjustment precision. Silent sealed discharge characteristics improve pinpoint success rates for subtle local cable faults, matching testing demands for all low-voltage and medium-voltage cables under 35kV. Multi-group C/V output configuration avoids secondary insulation damage to low-voltage cables during high voltage flash testing and effectively solves water ingress high-resistance fault diagnosis for medium-voltage power cables.

2.5 Intelligent Human-Machine Interaction & Remote Technical Service Support

A large-size all-weather capacitive touch screen runs embedded Windows operating system with dedicated cable fault testing software pre-installed. Full Chinese graphical menus, powerful waveform data storage and analysis functions deliver user-friendly human-computer interaction for field technicians. The equipment carries a 20G solid-state drive, storing up to 100 million groups of fault test waveforms for post-failure review and data archiving. Dual USB4.0 communication interfaces support waveform export, data backup and peripheral device connection. For complex unidentified cable faults encountered on-site, the tester reserves LAN wired network and 4G wireless network access modules. Field technicians can connect the equipment to the manufacturer’s remote technical service center, realizing real-time remote assistance, online algorithm calibration and troubleshooting guidance. A built-in 10W automatic impedance matching path transmitter realizes synchronous cable path tracking and buried depth measurement, finishing pre-ranging and pinpoint procedures in one continuous operation.

3. Complete Technical Indicators & Performance Parameters

This section lists the standardized technical indicators of ZX-S10 trolley cable fault tester for engineering reference:

Fault Pre-positioning Test Modes: Low-voltage pulse method, high-voltage flash method, arc reflection method

Display & Operation: Large-screen all-weather capacitive touch screen

Sampling Frequency Options: 6.25MHz, 12.5MHz, 25MHz, 50MHz, 100MHz, maximum 450MHz with adaptive pulse width

Maximum Test Cable Length: 100km, zero blind zone for ranging measurement

Measurement Precision: System relative test error ≤ ±0.5%; pinpoint positioning error ≤ ±0.2m

High Voltage Output Specifications: 0~40kV adjustable discharge voltage, 1kV adjustment accuracy

Power Supply Modes: Built-in lithium battery (4h continuous operation) / 220V AC mains supply

Storage & Interfaces: 20G SSD solid-state drive, dual USB4.0 ports, LAN & 4G wireless communication

Environmental Adaptability: Operating temperature -35℃ ~ +45℃; relative humidity ≤85% (25℃); applicable altitude ≤2000m

Physical Parameters: Overall dimension 580mm×540mm×900mm, total weight 40kg

4. Application Scope & Field Engineering Value

ZX-S10 targets all cable testing scenarios for power distribution networks below 35kV, covering multi-type cable bodies: aluminum core power cables, copper core power cables, high-frequency coaxial cables and local communication telephone cables with various cross-sections. It diagnoses all mainstream cable fault types: low-resistance short circuit, metallic short-circuit fault, cable core open circuit, and complex high-resistance faults including water ingress, insulation breakdown and aging partial discharge faults.

From the perspective of power grid operation and maintenance engineering, the integrated trolley design significantly shortens cable fault rush repair time. The all-in-one workflow unifies pre-ranging, path tracing and pinpoint positioning, reducing on-site equipment preparation time by over 60% compared with split testing systems. The built-in power supply expands the applicable range to remote suburban distribution lines without temporary power supply. The safety isolation design lowers the occupational safety accident risk of maintenance personnel during high voltage testing, while remote technical support reduces the technical threshold for grassroots maintenance teams lacking complex fault diagnosis experience.

5. Conclusion

Against the background of large-scale construction of urban and rural distribution networks, efficient, safe and integrated cable fault testing equipment has become an essential technical tool for power grid operation and maintenance. The ZX-S10 trolley cable fault tester overcomes multiple inherent defects of traditional separated cable fault detection systems through integrated trolley structural design, multi-mode composite ranging algorithms, built-in power supply and safety isolation high voltage control technology. Its complete technical indicators, high measurement precision and powerful remote service capability can effectively improve the efficiency and safety of medium-low voltage cable fault diagnosis. For power testing technicians, distribution network maintenance engineers and electrical equipment R&D practitioners, this all-in-one integrated cable fault locator provides a new technical solution for on-site cable fault detection, and its modular integrated design concept offers reference significance for the miniaturization and integration upgrading of future power test instruments.

 GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/