Product Overview
The XZH TEST Portable Cable Fault Locator System is a fully integrated, field-ready diagnostic platform for medium and low voltage underground power cable networks up to 35 kV. This all-in-one solution combines a Windows-based TDR pre-locator (XHGG502A2), a digital acoustic-magnetic pinpointer (XHDD503C), and a portable high-voltage pulse generator (XHHV535-2L) into a coordinated platform that covers every phase of cable fault management — from insulation testing and pre-location through precise pinpointing and post-repair verification. The 1250J compact power unit can break down fault cables in 7 seconds. Designed for utility crews, electrical contractors, and industrial maintenance teams, it delivers professional-grade accuracy and reliability in demanding field conditions ranging from -25°C to +65°C.
System Configuration
| Product Name |
Model |
Qty |
Key Capability |
| Cable Fault Pre-Locator |
XHGG502A2 |
1 |
TDR with 80 MHz sampling, 10.1-inch Windows touch screen, ≥65 km range |
| Cable Fault Pinpointer |
XHDD503C |
1 |
Digital acoustic-magnetic synchronization, <0.2 m accuracy, 8+ hours standby |
| Portable HV Pulse Generator |
XHHV535-2L |
1 |
0–35 kV, 0–400 W impulse power, integrated time relay 0–100 s |
System Components
1. XHGG502A2 — Cable Fault Pre-Locator (TDR)
High-Resolution Fault Ranging & Waveform Analysis
Advanced Time Domain Reflectometer with 80 MHz sampling for rapid initial fault distance measurement. Features a 10.1-inch industrial touch screen running Windows OS with automatic waveform analysis and massive test waveform storage. Supports low-voltage pulse and high-voltage flashover test methods for comprehensive fault diagnosis. The instrument combines modern electronic technology and computer technology to implement signal filtering, acquisition, data processing, graphic display, and analysis for cable speed measurement, length testing, and fault distance testing across power cables, coaxial cables, street light cables, and buried wires of all types.
- Sampling Frequency: 80 MHz
- Minimum Resolution: 0.10 m
- Ranging Range: ≥65 km
- Test Blind Zone: ≤20 m
- Test Methods: LV pulse, HV flashover
- LV Pulse Amplitude: 100V±15%
- Pulse Width: 0.1/0.50/2.50/7.25/10.0 μS
- Test Frequency: 80/40/10/2/1 MHz
- Display: 10.1-inch industrial touch screen, Windows system
- Battery: Built-in 5200mAH lithium battery, AC 110V~240V charging
2. XHDD503C — Cable Fault Pinpointer
Digital Acoustic-Magnetic Synchronization for Precise Fault Location
Professional cable fault pinpointing instrument using acoustic-magnetic synchronization method to determine power cable fault points with precision. Electronic flashover generated by the impact discharge generator is picked up and amplified by the corresponding probe, with fault location determined through auditory and visual judgment. Features powerful background noise reduction (BNR) and compass indication functions for confident fault point identification in noisy field environments. Integrates positioning technology and path-assisted testing with multiple test modes and comprehensive prompt information.
- Acoustomagnetic Accuracy: <0.2 m
- Path Identification Accuracy: <0.5 m
- Filter Modes: All-pass, Low pass, High pass, Bandpass (100Hz~1600Hz)
- Channel Gain: 8 levels adjustable
- Output Gain: 16 levels (0~112 dB)
- Output Impedance: 350Ω
- Power Supply: 4×18650 standard lithium batteries
- Standby Time: >8 hours
- Dimensions: 428L×350W×230H mm
- Weight: 6.5 kg
3. XHHV535-2L — Portable High Voltage Pulse Generator
Surge Discharging & DC High Voltage Withstand Testing
Compact high-voltage pulse generator integrating energy storage capacitor, DC high voltage source, and discharge ball gap into a single lightweight unit. Adopts humanized design with high-precision dedicated HV electronic components and high-frequency high-voltage technology for easy operation and portability. Features automatic over-current, over-voltage, and overheating protection for safe, reliable field operation. The built-in time relay allows discharge intervals to be set arbitrarily within 0–100 seconds, with uniform and controllable HV pulse output. Unique high-voltage measurement design enables real-time capacitor voltage indication even in stop state for thorough discharge monitoring.
- Impact High Voltage: 0–35 kV
- Short Circuit Current: 0–200 mA
- Path Power: 100 W
- Impulse Power: 0–400 W
- Discharge Interval: 0–100 s (time relay controlled)
- Protection: Over-current, over-voltage, overheating
- Design: Integrated capacitor + DC source + ball gap
Field Testing Workflow
- Cable Insulation TestPerform initial insulation resistance measurement to confirm fault presence and characterize fault type (high/low resistance, open/short circuit).
- Fault Pre-Location (XHGG502A2)Connect the TDR pre-locator with 10.1-inch Windows touch screen to measure the approximate distance to the fault. Select optimal test method (LV pulse for low-resistance faults, HV flashover for high-resistance/flashover faults).
- Surge Impulse Generation (XHHV535-2L)Apply periodic high-voltage surges up to 35 kV with time-relay-controlled intervals (0–100 s) to the faulty cable to create detectable acoustic and electromagnetic signals at the fault point.
- Precise Pinpointing (XHDD503C)Walk the cable route with the acoustic-magnetic pinpointer. Monitor the time-difference display with BNR filtering — the point where acoustic-magnetic time delay approaches zero is directly above the fault with sub-0.2 m accuracy.
- Cable Repair & Re-TestExcavate precisely at the marked point, repair the cable, and use the DC high voltage withstand test function to verify restoration and confirm operational integrity.
Applications
•Urban Distribution Networks: Fault location on buried medium and low voltage distribution cables up to 35 kV in city environments — precise sub-0.2 m pinpointing minimizes road excavation and traffic disruption.
•Industrial & Commercial Facilities: Diagnostics on plant power distribution cables, including those running under concrete floors, paved yards, and building foundations where access is constrained.
•Electrical Utilities & Service Contractors: Routine preventive maintenance, emergency fault response, and post-installation commissioning testing for underground power cable networks.
•Street Lighting & Municipal Infrastructure: Fault location on street light cables and buried municipal wiring — the system detects open circuits, short circuits, and high-resistance faults across various cable materials and cross-sections.
Frequently Asked Questions
Q1: What voltage levels can this system test and how fast does it break down faults?
This portable system is designed for medium and low voltage power cables up to 35 kV. The integrated XHHV535-2L pulse generator delivers 0–35 kV impact voltage with short circuit current up to 200 mA, and the compact 1250J power unit can break down fault cables within 7 seconds, making it highly efficient for field testing across a wide range of industrial and utility cable networks.
Q2: What is the difference between the pre-locator and the pinpointer?
The XHGG502A2 pre-locator performs rough (initial) fault distance measurement using TDR technology with 80 MHz sampling and ≥65 km range, providing a ≤20 m test blind zone. The XHDD503C pinpointer then performs precise fault location within the rough measurement range using acoustic-magnetic synchronization, achieving sub-0.2 m accuracy. This two-stage approach ensures efficient fault finding — first narrowing the search area, then pinpointing the exact excavation spot.
Q3: Can this system operate reliably in extreme field conditions?
Yes. Every component is engineered for demanding environments: the XHGG502A2 features a 10.1-inch industrial touch screen and operates from -25°C to +65°C; the XHDD503C pinpointer provides filter modes (All-pass, Low pass, High pass, Bandpass) with 16-level output gain for noisy environments; and the XHHV535-2L features over-current, over-voltage, and overheating automatic protection with real-time voltage monitoring. The complete system can be deployed in rain, dust, heat, and cold with no degradation in measurement accuracy.
Q4: What types of cable faults can this system detect?
The system is capable of detecting a comprehensive range of faults including low-resistance faults, short circuits, open circuits, disconnection faults, high-resistance leakage faults, and high-resistance flashover faults. It works across power cables, high-frequency coaxial cables, street light cables, and buried wires of various materials, cross-sections, and dielectric media. The pre-locator supports multiple test ranges (300m/1km/5km/25km/65km) to optimize measurement for different cable lengths.
Q5: What are the purchasing terms, warranty, and delivery schedule?
Standard delivery time is 5–8 working days after order confirmation. Each system component is packed in individual reinforced export-grade wooden cases with internal foam cushioning. XZH TEST provides standard manufacturer warranty with optional extended coverage. Minimum order quantity is 1 set, with T/T payment terms. Annual supply capacity is 500 sets, ensuring availability for both individual evaluation purchases and large-scale utility deployment programs.
Your message must be between 20-3,000 characters!
english
français
Deutsch
Italiano
Русский
Español
português
Nederlandse
ελληνικά
日本語
한국
العربية
हिन्दी
Türkçe
indonesia
tiếng Việt
ไทย
বাংলা
فارسی
polski
Overall Rating
Rating Snapshot
The following is the distribution of all ratingsAll Reviews