DEVICE FOR MEASUREMENT OF SPECIFIC ELECTRIC RESISTANCE OF EARTH IN FOUNDATION PITS FOR POWER TRANSMISSION LINES SUPPORT Russian patent published in 2008 - IPC G01R27/18 

FIELD: power engineering.

SUBSTANCE: device for measurement of specific electric resistance of earth in foundation pits for power transmission lines supports contains support plate for operator, electrodes, wires with clamps and measuring devices. Support plate is equipped with arresters that align its position above foundation pit and shaft, with the possibility of its rotation around its axis and that consists of separate links, on which worm gears and couplings are fixed that adjust distance between gears. At that worm gears are engaged with electrodes installed horizontally in insulating guides from diametrically opposite sides of gear and directed with their points into opposite walls of foundation pit walls, at that on electrodes there are teeth with pitch that corresponds to the pitch of teeth of gear that is made of dielectric material.

EFFECT: provision of possibility to measure specific electric resistance of earth directly in foundation pits prepared for installation of supports, higher accuracy of measurements, reduction of labour and material expenses.

2 dwg