Spotting the earth connection and short circuits between the electric conductors, using D.C. bridges for resistance measurements

International Conference on Applied Sciences 2014

Popa, I.^1 ; Popa, G.N.^1 ; Deaconu, S.I.^1 ; Iagr, A.^1

Politehnica University of Timisoara, Department of Electrical Engineering and Industrial Informatics, 5 Revolution Street, Hunedoara

331128, Romania^1

关键词: Earth connection;    Power lines;    Resistance measurement;    Thomson;    Wheatstone bridges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/85/1/012027/pdf
DOI  :  10.1088/1757-899X/85/1/012027

来源: IOP

【 摘 要 】

The paper establishes the necessary connections meant to spot the earth connections and short circuits between the conductors of a power line, using the DC bridges meant for measuring resistances between conductors at the ends of the power line. Since it is a relative method, it imposes an exact knowledge of the faulty power line setting. For values of the resistances measured between the conductors of the power line having over 1Ω at one end, the measurement will be carried out with a Wheatstone bridge, and for values below 1Ω with a Thomson bridge. In order to accurately determine the place of the fault, it measured the distances from the end of the line up to the fault and then we performed a correction calculation for this distance.