Cable Fault Pre-Locator | TDR Tester with Micro-Printer | XHGG501B
The XHGG501B cable fault pre-locator, also known as a cable fault tester, is a portable and essential tool for locating faults in cables efficiently and accurately. With a small size and lightweight design, this device is easy to carry around, allowing users to quickly identify cable faults in confined spaces or outdoors.
This cable fault tester is a special instrument for measuring and analyzing the fault status and fault distance of power cables. It is suitable for low-resistance, short-circuit, open-circuit and disconnection faults of power cables, coaxial cables, street light cables and buried wires of various materials with different cross-sections and different media.
Work mode: low-voltage pulse method and high-voltage flashover method (direct flash method and impulse flash method).
Applications & Target Audience: Engineered for rural power grid and township electrification maintenance teams, smart building and property facility system integrators, emergency power restoration and disaster relief teams, and electrical equipment rental companies that locate low-resistance, open-circuit, disconnection and flashover faults on distribution cables up to 32km.
Product Features
- Industrial-grade 5.7-inch dual-color screen;
- Single-chip centralized control with push-button operation and strong anti-interference ability;
- Functions of distance measurement, speed measurement and resistance measurement;
- The micro-printer is integrated with the host, which can print test waveforms and test reports at any time;
- Fully automatic continuous sampling, waveform capture is timely and accurate;
- With low-voltage pulse sampling method and flashover sampling method;
- Built-in large-capacity battery pack, easy to use;
- Adopts protective case, not lower than IP54.
Technical Specification
| Parameter |
Specification |
| Sampling frequency |
100MHz |
| Low voltage pulse amplitude |
35V |
| Pulse width |
0.2uS/2uS |
| Minimum resolution |
1.0m |
| Test blind area |
≤35m |
| Ranging range |
≥32km |
| Measurement error |
≤±(0.5%×L+1m), L is the cable length |
| Communication interface |
RS232 |
| Power supply mode |
Charging AC110V~240V, 50Hz/60Hz; built-in 5200mAH lithium battery power supply |
| Working conditions |
Temperature -20~+65°C, relative humidity ≤90% |
| Volume |
358L×284W×168H mm |
| Weight |
4.6kg |
Working Principle and Testing Methods
Based on the TDR (time domain reflectometry) principle, the XHGG501B applies a pulse signal to the cable under test. When the electric wave travels in the transmission line and encounters a point where the characteristic impedance changes, a reflected signal is generated and displayed as a waveform. The polarity of the echo at the short-circuit point is opposite to that of the transmitted pulse, while the polarity of the echo at the open-circuit point is the same, which allows the operator to judge the fault nature and calculate the fault distance:
| Testing Method |
Working Principle |
Typical Applications |
| Traveling Wave Method (TDR) |
Applies pulse signals and captures echoes at impedance-change points, converting reflection time into fault distance. |
Core ranging principle covering all cable fault types |
| Low-Voltage Pulse Method |
Injects 35V low-voltage pulses and analyzes the reflected waveform to measure cable length, wave speed and fault distance. |
Open-circuit, low-resistance, short-circuit and disconnection faults |
| High-Voltage Flashover Method (Direct Flash) |
A DC high-voltage power supply applies voltage to the faulty cable; when the voltage reaches a certain value, the fault point breaks down and flashes over, and the reflected signal is captured. |
High-resistance flashover faults of power cables |
| High-Voltage Flashover Method (Impulse Flash) |
The high-voltage pulse signal source applies impulse signals to the faulty cable to discharge the fault point instantly, and the sampler receives the fault reflection signal. |
Leakage high-resistance faults of power cables |
This instrument provides cable engineers with a reliable, comprehensive solution for power cable fault pre-location, helping minimize outage time through rapid and accurate fault distance measurement.
Packing List
| Item |
Quantity |
| Cable fault tester |
1 unit |
| Sampling box |
1 piece |
| Power cord |
1 piece |
| Single Q cable |
1 piece |
| Double Q cable |
1 piece |
FAQ
Q1: Who is this cable fault pre-locator designed for?
It is designed for rural power grid and township electrification maintenance teams, smart building and property facility system integrators, emergency power restoration and disaster relief teams, and electrical equipment rental companies that locate low-resistance, open-circuit, disconnection and flashover faults on distribution cables up to 32km.
Q2: What cable fault types can the XHGG501B test?
It tests low-resistance, short-circuit, open-circuit and disconnection faults of power cables, coaxial cables, street light cables and buried wires of various materials with different cross-sections and different media, as well as high-resistance flashover and leakage faults with the high-voltage flashover method.
Q3: What testing methods does the XHGG501B support?
It supports the low-voltage pulse method and the high-voltage flashover method, including the direct flash method for flashover faults and the impulse flash method for leakage high-resistance faults, all based on the TDR principle with fully automatic continuous sampling.
Q4: What are the key technical specifications of the XHGG501B?
It features 100MHz sampling frequency, 35V low-voltage pulse amplitude, ≥32km ranging range, 1.0m minimum resolution, ≤35m test blind area, measurement error of ≤±(0.5%×L+1m), a 5.7-inch dual-color screen, an integrated micro-printer, RS232 communication interface and a 4.6kg lightweight design.
Q5: What is included in the delivery and what after-sales service is provided?
The delivery includes the cable fault tester host, sampling box, power cord, single Q cable and double Q cable. The instrument is guaranteed free of charge for product quality problems within one year from the date of purchase, and maintenance and technical services are provided for life.
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