By analyzing the situations of the fault separating equipment home and abroad, aiming at the practical application of automatization in distribute transmit line. A fault separating equipment of transmit line in distribute is researched and developed. This paper discussed the fault peculiarities of three-phase, two-phase and single- phase to ground in distribute transmit line. And it emphasized on testing single-phase to ground of power system with floating neutral and separating fault of distribute. Established the mathematics model of testing short circuit and single-phase to ground fault in transmit line. Designed hardware and software. Equipment have been did simulative experiment and tested precision.
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