Distribution Transmission Line Fault Indicator Advantages

A detection device used to indicate the occurrence of short-circuit faults and ground faults in distribution lines in a power distribution system and to indicate the phase of faults. According to the use can be divided into cable and overhead type. The main role of the fault indicator in the distribution network automation is firstly to monitor the real-time operation status of the distribution network, and secondly to achieve rapid fault location and isolation in the event of grid faults, and to shorten the fault processing time.

　　This will shorten the outage time and improve the stability of power supply. The development of power distribution automation makes the fault indicator widely used.

　　Line fault indicator can be directly installed in the 6KV to 35KV voltage level line, through the scene flap, flash indication way to check the line grounding, short-circuit faults, line management personnel to find faults to provide technical support.

　　At present, generally provided by the solar cell to the battery charging, so worried about the rainy day power shortage, at the same time, large solar panels, when the wind swings, pit wind ability is poor.

　　Ideal way is through the current transformer induction to take power directly to the battery charging (for data collectors and other electronic devices to provide working power, for wireless telecommunication equipment to provide communication power, for the electric mechanism to provide driving power, and can be on the backup battery and energy storage capacitor charging. Due to the small size and easy installation, the current transformer inductive power supply has become a more dominant way of drawing power in the fault indicator system. Currently there are some difficulties in implementation, because the current is too variable, and the excess energy is not well released when the current is high. What is needed is a wide-range input CT energy harvesting circuit to realise micro-power high-voltage power taking. Power industry standard DL/TL1157-201 Technical conditions for distribution line fault indicators. (Requirements: the standby state of the line fault indicator of the whole machine operating current is not greater than 20UA). Adopted the power supply design combining power taking by line induction and battery standby, which solves the problem of short service life of the fault indicator in the market due to only relying on battery power supply.

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