Cable Fault Testing System
The ZWH450 is an intelligent, high-precision detection system designed for comprehensive power cable fault troubleshooting.
Utilizing advanced 400MHz high-frequency sampling and Multiple Pulse (TDR) technology, it easily pre-locates and accurately pinpoints open circuits, short circuits, and stubborn high-resistance flashover faults up to 100km away.
Product Overview
The ZWH450 Cable Fault Testing System is a pure integrated solution consisting of four premium components: the 12.1-inch TDR Analyzer, Multiple Pulse Generator, Ultra-Quiet Acoustic Fault Locator, and a 32kV Integrated High-Frequency Power Supply.
Engineered for heavy-duty outdoor use, this system dramatically reduces downtime by transforming complex high-resistance breakdowns into easily readable short-circuit waveforms.
Key Functions and Features:
1. Industry-Leadingc400MHz Sampling: The main analyzer features an ultra-high 400MHz sampling frequency, automatically adjusting its pulse width (100ns~10μs) to deliver unmatched distance resolution and pinpoint accuracy up to 100km testing ranges.
2. Advanced Multiple Pulse Technology: When combined with the high-voltage power supply, it seamlessly captures low-resistance, high-resistance leakage, and flashover faults, automatically analyzing waveforms on its Linux-based operating system.
3. Super-Bright 12.1-inch Dual Control: Equipped with a massive 12.1-inch industrial-grade LCD touch screen that is perfectly visible under bright outdoor sunlight. It supports both modern touch operation and traditional rotary knob adjustments.
4. Ultra-Quiet BNR Acoustic Pinpointing: The included locator uses BNR intelligent background noise reduction and custom ground sensors to filter out chaotic street noise. Screen arrows dynamically indicate both the forward direction and relative left/right position to keep you precisely above the cable axis.
5. Integrated Smart HV Power Supply: The 32kV/1536J surge generator features a pure integrated design with built-in capacitors (3uF), eliminating messy external wiring. It is fully controlled via a touchscreen, supporting single and continuous pulses with an automatic discharge safety function upon shutdown.
6. Mass Storage: A built-in 32GB solid-state drive effortlessly stores massive amounts of historical fault waveforms for future comparison and MS Word reporting.
Technical Details
ZWH450 Cable Fault Tester (Main TDR Unit)
| Parameter | Specification |
|---|---|
| Testing Methods | Low-voltage pulse, High-voltage flashover, Multiple-pulse |
| Testing Distance | 5m - 100 km |
| Testing Blind Zone | 5m |
| Sampling Frequency | 3.125MHz ~ 400MHz (8 automatic gears) |
| Testing Error | System rough measurement error < ±1%, Pinpointing error ±0.2m |
| Display | 12.1-inch LCD touch screen |
| Operating System | Linux (Supports English, Russian, Chinese) |
| Operation Mode | Touch screen + Rotary knob |
| Storage Space | 32GB solid-state drive |
| Power Supply | AC 220V or DC 12V built-in lithium battery (Approx. 6 hours runtime) |
| Weight | 5 kg |
| Dimension | 390 x 280 x 160 mm |
ZWH450 Multiple Pulse Generator
| Parameter | Specification |
|---|---|
| Working Voltage (Impulse) | ≤ 40kV |
ZWH450 Ultra-Quiet Acoustic Fault Locator
| Parameter | Specification |
|---|---|
| Sensor Dynamic Range | Audio channel > 104dB ; Magnetic channel > 110dB |
| Audio Amplification | > 90dB |
| Impulse Discharge Volume Limit | 84dB(A) (On/Off control) |
| Sensor Frequency Range | 100Hz - 1500Hz |
| Low-pass Filter | 100Hz - 400Hz |
| Band-pass Filter | 150Hz - 600Hz |
| High-pass Filter | 200Hz - 1500Hz |
| Display | High brightness true color screen (320 x 240) |
| Power Supply | Replaceable alkaline batteries |
ZWH450 Integrated High-Frequency HV Power Supply
| Parameter | Specification |
|---|---|
| Output Voltage | Negative DC ≤ 32kV |
| Working Current | ≤ 10A |
| Working Mode | Single pulse, Continuous pulse |
| Built-in Capacitor | 3μF / 32kV |
| Max Discharge Energy | ≤ 1536 J |
| Pulse Period | 4s - 8s (Adaptive control) |
| Auto Discharge | Automatic voltage step-down and discharge upon shutdown |
| Display | Touch screen (800 x 480 resolution) |
| Power Supply | AC 220V ± 10% |
| Weight | ≤ 28 kg |
| Dimension | 550 x 300 x 435 mm |
Model Selection Guide
| Feature | ZW5320 | ZW8320 |
|---|---|---|
| Max Output Current | 20A | 20A |
| Max Resistance Range | Up to 200Ω | Up to 25kΩ (Includes 10mA, <1mA steps) |
| 3-Phase Auto Test | Supported | Supported |
| Auto Degaussing | Supported | Supported |
| Magnetic Assist | Not available | Supported |
| Best Application | Standard distribution & medium power transformers. | Large power transformers requiring rapid LV winding tests. |
Recent Work
Parts List
| Item NO. | Max Current | Measuring Range | Main Features | Recommended Application |
|---|---|---|---|---|
| GDZR-10A | 10A | 100μΩ - 20KΩ | Portable, built-in discharge alarm | Small to medium distribution transformers |
| GDZR-20A | 20A | 10μΩ - 10KΩ | High-speed testing, heat dissipation | Medium-sized power transformers |
| GDZR-40A | 40A | 1μΩ - 2KΩ | Dual-channel measurement, high current | Large-scale power transformers |
| GDZR-40A | Three-Phase 10A | 100μΩ - 10KΩ | Three-phase simultaneous measurement | Yn-type transformers, time-saving |
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Certificate
Frequently Asked Questions
Contact our engineers for technical support and application guidance.
A higher sampling rate directly translates to a much finer waveform detail and smaller distance resolution. At 400MHz, the ZWH450 captures fault reflections with extreme precision (down to mere centimeters), significantly reducing the margin of error when locating faults on very long cable runs.
The locator utilizes dual-sensory technology to measure the time difference between the magnetic pulse and the acoustic sound wave. Based on these calculations, the screen displays a black arrow to point you forward toward the fault, and a yellow arrow to keep you perfectly centered over the cable axis.
Yes. High-resistance and flash-over faults are typically the hardest to locate. By using the system’s Multiple Pulse Generator combined with the 32kV/1536J High-Voltage Power Supply, high-resistance breakdowns are captured cleanly and converted into simple, readable short-circuit waveforms.
Absolute safety is built into the design. Because the capacitor is built-in (pure integrated design), there are no exposed high-voltage dangerous wiring patches. Furthermore, it features an emergency stop button and an automated discharge system that safely dumps residual high voltage instantly after shutdown.
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