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Distribution Power Line Monitoring System

Fault Detection & Location, DA Equipment monitoring


Consisting of overhead line sensor, concentrator and cloud-based analytics system, the InHand Wireless Overhead Line System (IWOS) provides accurate fault detection & location for distribution networks through precision measurement and high-speed waveform recording of line current. The system significantly shortens response and treatment time of overhead line faults and allows utilities to improve reliability and efficiency. The IWOS is proven by China State Grid and power utilities with more than 50,000 line sensor installations by 2017. 

Overhead Line Sensor Concentrator Cloud Analytics System Easy Installation Success Story Resources

“Always-on” Reliability  

-Efficient Low Current Energy Harvesting Technology


5A       4KHz


Stable energy harvesting from low load lines(5A)

● Real-time waveform-recording(4KHz) of current & electrical field

● Controllable harvesting power, short circuit current protection 


High Precision Measurement 

-Innovative Overhead Line Sensor



  • Advanced, high-precision and high-bandwidth electronic current transformer

  • Overhead line current measurement precision ±1% 

  • Highly-sensitive measurement of electric field, unaffected by multi-circuit line on one pole

Learn More about Overhead Line Sensor


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Concentrator for Commnuication and Zero-Sequence Current

High-precision Three-Phase Time Sync



100μs/1.8°


Three phase wireless time sync accuracy 100μs

● Maximum three phase phasor degree error 1.8°

Learn More about Concentrator


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Cloud-based Overhead Line Analytics System

The Overhead Line Analytics System provides various functions including data collection, overhead line status display & analysis, fault alarms and preventive analysis, allowing distribution utilities to achieve accurate fault location, reduce downtime and improve efficiency. 



  • Automatic fault detection, location and alarming 

  • Real-time line status display and historical line faults analysis

  • Preventive maintenance based on AI deep learning  

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Easy Installation and Maintenance-free
  • Installation takes minutes using standard hot stick on live lines 
  • Maintenance free with remote software upgrade
  • Reduce costs and improve efficiency
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