BIS Broadband Impedance Cable Fault Locator

BIS Broadband Impedance Cable Fault Locator

The MOEORW-WLF10 is a portable cable broadband impedance defect locator. It performs non-destructive testing with a positioning accuracy of <0.5%, fast testing speed, and long battery life.

It is suitable for power cables of all voltage levels, can locate minor defects and joint problems, and is suitable for long-distance and submarine cables.

BIS Introduction

The Broadband Impedance Spectrum (BIS) method was developed to address the shortcomings of traditional time-domain reflection (TDR) in locating subtle local defects in cables. This portable instrument, equipped with a rechargeable battery, is a non-destructive testing system. Through the combination of self-developed CBIS testing software and hardware, the system exhibits high sensitivity and accuracy in identifying local defects and intermediate joints in cables, with a location error of <0.6%. Employing frequency domain measurement principles, it detects the reflection of an incident signal (a sinusoidal linear sweep signal with a fixed frequency step) at the impedance discontinuity. By analyzing the reflected wave (or a standing wave composed of the incident and reflected waves) at the transmitting end and calculating the location of the impedance discontinuity based on the cable's propagation speed, the system can effectively address these issues .

CBIS test system configuration

Test host (PC), CBIS test software, instrument box, charging power cord, dongle, 4 test connection cables, and operation manual.

I. Detection Performance Parameters

Effective detection range: 50 meters to 100 kilometers

Positioning error: <0.5% (The instruction manual also mentions a positioning error of <0.6%, but the <0.5% figure in the performance parameters shall prevail).

Frequency sweep range: 5Hz～20MHz

Output signal-to-noise ratio: >80dB

Detectable defect scale: micro-defects at the centimeter level (formed by moisture, overheating, external damage, chemical, irradiation, water tree, etc.).

Output voltage: AC 10V

Single test duration: no more than 1 minute

II. Hardware Physical Parameters

Total weight: <2kg (including battery)

Equipment dimensions: 28.3 cm × 6.1 cm × 20.5 cm (smaller than A4 paper)

Battery capacity: 8000mAh

Continuous working time: >6 hours, supports fast charging

Operating temperature: -15℃～+50℃

Operating humidity: ≤80% (relative humidity)

III. System Architecture and Functional Parameters

Hardware architecture: Based on ARM Cortex design, with an ARM64 CPU architecture and FPGA components.

Operating system: Linux kernel (Linux-6.1.21-v8+)

Spectral analysis: Features frequency domain and time domain data analysis capabilities, and frequency domain spectrum defect compensation.

Assisted identification: Automatic peak location detection for defects, and bar chart display of defect severity.

Data processing: Supports viewing multi-phase curves (up to 6 lines can be selected), marking single-phase curves, and can annotate defect types/levels, normal joints, and cable ends.

Report Output: Supports automatic generation, preview, and export of PDF format test reports.

Data storage: Supports saving, reading back, and exporting test data via USB interface.

IV. Testing Adaptation Parameters

Compatible cable types: 10kV/35kV/500kV power cables (including submarine fiber optic composite cables)

Testing methods: Supports phase-to-ground testing and phase-to-phase testing, and can complete the testing of cables without ledger information.

Wave speed setting: Supports custom wave speed (e.g., 170m/μs is commonly used in field cases).

It enables non-destructive testing, has a long effective testing distance, high positioning accuracy, and significantly reduces labor and maintenance costs;

(2) The testing speed is fast, with a single test taking no more than 1 minute, which greatly improves the efficiency of cable maintenance;

(3) It can complete cable distance measurement and intermediate joint defect location, and can also effectively complete the inspection of cables without ledger information;

(4) It can detect minute defects at the centimeter level caused by moisture, overheating, external damage, chemical exposure, irradiation, water tree, etc.

(5) Simple operation, good user experience, parameters can be set for different working conditions, and detection and positioning can be completed with one click;

(6) A professional after-sales service team provides point-to-point remote technical support;

(7) The product is small in size, sturdy and durable, easy to carry, and has a long battery life.