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HF-C-204 Cable Fault Location Monitoring
Our Cable Fault Location Monitoring system continuously tracks operational status of high and medium voltage power cables. It quickly detects insulation faults, pinpoints fault positions accurately and triggers real-time alarms, effectively cutting outage time and simplifying daily power grid maintenance work.
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The Online Cable Fault Location & Monitoring System is an all-weather online monitoring device developed specifically for high-voltage and medium-voltage distribution cables. It collects real-time cable operating conditions, captures transient fault signals and latent insulation defects throughout operation.
Built upon travelling wave detection and high-precision algorithms, the system rapidly identifies various faults including short circuits, earth faults, insulation aging and abnormal cable joints, and pinpoints fault locations accurately. It supports fault pre-warning, real-time alarm notification and historical data traceability.
Capable of 24-hour unattended monitoring, the equipment drastically cuts unexpected power outages caused by cable failures, shortens troubleshooting duration, upgrades the intelligent operation & maintenance level of distribution networks and enhances power supply reliability. It is widely deployed in urban power grids, industrial parks, substations, wind farms and photovoltaic power stations.
System Functions
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Fault Location
Adopting two-terminal automatic ranging technology to implement two-terminal distance measurement for high-voltage main circuit cables. The fault position will be marked and displayed on the system background interface. The fault ranging accuracy is up to ±1.7 m or ±0.2%L (whichever is larger).
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Fault Line Selection (Optional)
It monitors transient current variations of all branch cables in real time. Based on the travelling wave line selection principle and power grid topological structure, the faulty outgoing branch line can be identified accurately.
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Fault Early Warning (Optional)
By analyzing the transient travelling wave characteristics of intermittent faults, the system monitors cable insulation conditions. Since the insulation status after temporary cable earth faults approaches a faulty state, the system delivers reliable early warnings prior to permanent earth faults.
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Circulating Current Monitoring (Optional)
Designed for single-core cables, this function monitors the insulation condition of cable outer sheaths, draws circulating current curves, and triggers fault alarms for cables with abnormal outer sheath insulation.
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System Cloud Service (User Optional)
Exclusive cloud storage space is allocated to each user. Users can access on-site system monitoring data anytime and anywhere via web browsers. Historical operational data is permanently stored for retrospective checking.
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Power Failure Protection (Optional)
The power module inside the cable precise fault locator works in hot standby mode. Upon mains power outage, the device can continuously operate for no less than 8 hours to guarantee the integrity of data collected the moment power cuts off.
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Unattended Duty Service (User Optional)
Realizing fully unattended operation. Alarm notifications and equipment operating status can be pushed to designated staff via SMS messages and mobile APP alerts.
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Historical Data Storage
Real-time data is automatically saved continuously; the system supports historical data inquiry and alarm record printing.
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Wave Recording Function (Optional)
The system performs real-time fault waveform recording. Given the massive data volume generated during wave capture, stable data transmission is required, and optical fiber cabling shall be deployed on site accordingly.
Technical Parameters
| Parameter | Specification |
|---|---|
| Monitoring Device Dimensions | 260mm × 340mm × 88mm |
| High-frequency Current Sampling Rate | 50 MHz, 8 channels |
| Power Frequency Current Sampling Rate | 10 kHz, 8 channels |
| Voltage Sampling Rate | 100 kHz, 4 channels |
| High-frequency Monitoring | High-speed sampling at 50 MHz over 8 channels; supports simultaneous monitoring of 8 cables |
| Power Frequency Monitoring (for single-core cables) | 10 kHz sampling across 8 channels; supports simultaneous monitoring of 8 cables |
| Measuring Bandwidth of High-frequency Sheath Sensors | 100 kHz ~ 5 MHz |
| Measuring Bandwidth of High-frequency Core Wire Sensors | 1 kHz ~ 100 MHz |
| Measuring Bandwidth of Power Frequency Sheath Sensors | 50 Hz ~ 1 kHz |
| System Fault Location Accuracy | ±1.7 m or ±0.2%L (whichever is greater) |
| Fault Line Selection Accuracy | ≥95% |
| Timing Accuracy (GPS / Optical Fiber / Beidou) | 20 ns |
| Cloud Service (User Optional) | Alibaba Cloud |
| Power Consumption | ≤10 W |
| Communication Interfaces | 4G wireless communication / 2 × Ethernet ports / 2 × Optical ports |
| Power Supply Modes | AC 110~220 V / DC 15~60 V / CT coupled power acquisition (starting current ＞ 30 A) |
| Power Hold Duration After Mains Failure | ≥8 h |
| Mean Time Between Failures (MTBF) | ≥50,000 h |
| Upper Computer System | Master Station or Cloud Platform |
| Operating Temperature | -40℃ ~ +70℃ |
Cable Fault Location & Monitoring System FAQ
1. What is the working principle of the cable fault location monitoring system?
Answer: The system adopts travelling wave detection technology and high-precision sampling algorithm. It captures transient fault signals and insulation fluctuation signals from cables, realizes real-time fault identification, fault line selection and precise distance measurement, and supports early warning of latent insulation defects.
2. What is the fault location accuracy of the system?
A: The positioning accuracy is ±1.7m or ±0.2%L (whichever is larger), which meets the precise troubleshooting requirements for urban power grids, industrial parks and new energy stations.
3. How many cables can the device monitor at the same time?
A: The device is equipped with 8 high-frequency sampling channels and 8 power-frequency sampling channels, supporting real-time simultaneous monitoring of 8 cables.
4. What types of cable faults can the system detect?
A: It can identify and locate short circuit fault, earth fault, cable joint abnormality, insulation aging, intermittent transient fault and other hidden insulation defects. It supports both permanent and temporary cable faults.
5. What is the difference between high-frequency monitoring and power-frequency monitoring?
A: High-frequency sampling (50MHz) is mainly used for fault travelling wave capture and precise positioning; power-frequency sampling (10kHz) is mainly used for real-time operating state monitoring and sheath circulating current analysis of single-core cables.
6. Does the system support fault early warning?
A: Yes (optional). The system analyzes the transient travelling wave characteristics of intermittent faults. It identifies insulation deterioration trends and issues early warnings before permanent grounding faults occur.
7. Can the device continue working after power failure?
A: Yes. Built-in hot standby power module supports ≥8 hours continuous operation after mains power outage, ensuring complete data recording during sudden power loss.
8. What communication methods does the system support?
A: It supports 4G wireless communication, dual Ethernet ports and dual optical ports. It can upload data to local master station or cloud platform remotely.
9. Does the system support remote monitoring and cloud access?
A: Yes (optional). Users can log in via browser anytime and anywhere to check real-time operating data, historical records and alarm information. The system supports long-term data storage and traceability.
10. Does it support unattended operation?
A: Yes (optional). The electronic duty function pushes alarm messages and device status via SMS and mobile APP, realizing 24-hour unattended monitoring.
11. What is the working temperature range of the device?
A: The device supports -40℃ ~ +70℃ wide temperature operation, adapting to outdoor box substations, industrial parks, wind farms and photovoltaic stations.
12. What is the MTBF of the equipment?
A: The equipment MTBF is ≥50000 hours, with stable long-term operation performance.
13. Does the system support sheath circulating current monitoring?
A: Yes (optional). It is specially designed for single-core cables. It monitors outer sheath insulation status in real time, generates circulating current curves and alarms for abnormal sheath insulation.
14. What timing modes does the system support?
A: It supports GPS / Fiber / Beidou timing with high precision of 20ns, ensuring synchronous data sampling of all channels.
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