Innovative low current (1A) auto power-harvesting technology
Advanced electronic current transformer, measurement precision of line current reaching ±0.5%.
High-speed wave-recording (12.8kHz) of line current and line-to-ground electric field
High precision (<20μs) wireless time synchronization
Low power consumption bi-directional wireless communication, supports remote upgrade and maintenance
Install and remove live, IP67 protection rating
The Overhead Line Sensor, acquisition unit and core sensing unit of the system, is applicable to 10kV overhead distribution lines. With innovative low current energy harvesting and wireless communication technologies, the Overhead Line Sensor can submit real-time monitoring data, keeping operational staff updated of the operation status of power lines. With big-data based comprehensive distribution line status analysis, the InHand Wireless Overhead-line Monitoring System can provide line status analysis including line faults, line loads, energy quality, etc., giving comprehensive and solid data support for structural optimization of distribution networks.
With innovative precision current measurement and line-to-ground electric field detection technologies, measurement precision of line current between 0~600A reaches ±1%, detection sensitivity of change of line-to-ground electric field reaches ±0.5%, thus the sensor can accurately recognize power line status. It supports wave-recording of line current during faults or batch summon of operation data, which will lead to operation experience accumulation and continuous improvement.
With accurate recognition of line status, the product can detect interphase short circuit, single phase ground faults, etc. accurately. It can auto decide action value of fault current alarming with its powerful signal processing and micro-computing capabilities, effectively preventing mal-operation or refusing to operate that are caused by load fluctuation, reclosing magnetizing inrush current, etc.. Supports inverse time-delay action for maximum coordination with substation protection action, avoiding momentary disturbances and ensuring correct actions.
Provides operational information, including line current, line-to-ground electric field, fault status, live or dead, etc. to main station system. Can also provide information like cellular signal strength, battery voltage, etc., to help operational staff learn overall status of the overhead lines.
Super bright LED provides 360° visible status indication, and indicates different line status by different flashing frequencies. Auto resets when fault is removed and power supply recovers; also supports timed reset, and wireless remote set and reset.
Hybrid networking of short and long range wireless connection, support various complicated line topologies; proactive regular (configurable, default every 5 minutes) line status reporting, and bi-directional confirming and resending communication functions, safeguarding data transmission reliability. Keep track of real-time status of lines, putting an end to the “wake up once a day or never wake up” mode of traditional fault indicators, while on less wireless communication costs.
Though embedded with a large capacity, long-service argon lithium battery, by applying new material and innovative power supply technology, the Sensor can continuously harvest energy from the line when line current is between 0~680A. A line current of 1A can meet the minimum requirement for energy harvesting, saving the use of batteries and prolonging product service life.
Operate autonomously once hanged on line, completely maintenance free. Customers may remote configure parameters, update fault criteria or upgrade the software wirelessly when necessary. The complete maintenance free design offers convenience, flexibility, and improved efficiency.
Use insulated hot stick to live install or remove the device safely and conveniently.
The Sensor is highly ruggedized to ensure long hours of reliable operation even under harsh conditions, featuring high EMC level, extremely wide range of input voltages and operating temperatures, IP67 protection rating, resistance to storms and typhoons of force 8, coated structural parts that are corrosion and rust proof and resistant to salt spray corrosion.