Huazheng HZ-A40 Cable Testing and Fault Locating Van System

HZ-A40 Cable Testing and Fault Locating Van System is a high-performance device developed by our company to keep pace with the development trends of the international power industry and meet the dynamics of rapid power development. Designed to meet the needs of power cable operation and maintenance sites, it integrates a complete set of cable fault testing functions. The entire system is designed with an integrated approach, eliminating the need for vehicle transport during export. This allows for flexible vehicle selection and portable installation in the destination country.

Product Features
Through continuous R&D and innovation, our product offers the following key advantages:

Comprehensive Cable Management Support: Provides a solid foundation for cable installation, maintenance, and management.

Wave Velocity Verification: Improves fault location accuracy by calibrating signal propagation speed within the cable.

Multiple Pulse-Based Pre-location: Utilizes multi-pulse technology to pre-locate various types of main insulation faults in power cables.

Embedded Design with Chinese Interface: Ensures stable system operation with an intuitive user interface.

Distributed Control Bus Technology: Delivers a high level of automation, simplifying testing and wiring processes.

Controllable High-Voltage Pulse Output: Offers high impact energy, meeting both pre-location and precise location requirements.

DC High Voltage Output & High-Current Burn-Through: Rapidly carbonizes high-resistance fault points (e.g., in water-affected cables).

High-Impact Energy Output: Consistently delivers 2,048J of impact energy, especially suitable for internal faults in high-resistance joints.

Cable Withstａnd Voltage Test: Efficiently detects insulation performance and potential cable faults.

Comprehensive Safety Protection: Includes ground protection monitoring, live video surveillance of the test site, step voltage protection, and self-check functions to maximize operator safety.

Optional Wireless Intercom System: Enables real-time communication between the fault location site and vehicle personnel for quick response to abnormalities.

Technical Specifications
1 Vehicle-Mounted Main Control System

Test Scope: Applicable to main insulation faults in power cables of various voltage levels, cross-sections, dielectrics, and materials, including open circuit, short circuit, low resistance, high resistance leakage, and high resistance flashover faults.

Display: 15-inch industrial-grade LCD (Linux OS), 1024×768 resolution.

Storage: 32GB solid-state drive.

Test Methods: Low-voltage pulse, high-voltage flashover, multiple pulses, DC/burn-through modes.

Burn-Through Mode: Output voltage 0–40kV, output current 0–100mA.

Operation: Photoelectric knob control (touch screen optional).

Pulse Parameters: Pulse width 100ns–10μs, pulse amplitude 120V.

Gain Adjustment: -20 to +40dB.

Output Impedance Matching: 120Ω.

Test Distance: 5 m to 100 km, with a blind zone of 5 m.

Location Accuracy: ±0.2 m for precise location, system error less than ±1%.

Multiple Pulse Generator: Impulse voltage ≤40kV.

Resolution: (v/2) × f meters (v/2: half-wave velocity in m/μs; f: sampling frequency in MHz).

Sampling Frequencies: 200MHz, 100MHz, 50MHz, 25MHz, 12.5MHz, 6.25MHz.

Location Accuracy: ±(0.2% × L + 1) m.

2 Vehicle-Mounted High-Voltage Control System

Output Voltage: 0–32kV, continuously adjustable.

High-Voltage Start: Requires authorized key operation.

Built-in Capacitors: Three levels: 4 μF/32kV, 16 μF/16kV, and 64 μF/8kV.

Maximum Impact Energy: 2048J.

Operating Modes: Continuous flashover, single flashover, DC high voltage.

Continuous Pulse Period: 1 to 10 seconds.

Display: 5-inch color LCD, 800×480 resolution.

Prompt Format: English prompts with intuitive numerical display.

Stable High-Voltage Operation: Control software remains stable under high-voltage conditions.

Automatic Discharge Function: Automatically discharges residual power after emergency stop or power-off.

Input Voltage: AC220V±10%/50Hz.

3 Vehicle-Mounted Cable Reel and Safety Monitoring System

Safety Monitoring Module: Monitors the FOHM loop, FU step voltage, secondary pulse overheating, and the "Threshold Switch" status in real time. Abnormal signals trigger a pop-up on the host interface, automatically cut off high-voltage power, and initiate discharge. Once resolved, the pop-up closes and high-voltage power restores.

High-Voltage Cable Reel: 50 m.

System Grounding Wire Panel: 50 m.

Power Cord Reel: 50 m.

Step Voltage Line Reel: 15 m.

Safety Contact Switch: "Threshold Switch" socket (as shown in Figure 3.5 ③), expandable to a door safety contact switch.