METHOD OF PROTECTIVE EARTHING OF OVERHEAD SYSTEM AT REPLACEMENT OF RAIL-AND-SLEEPER GRID WITH WIDE FRONT Russian patent published in 2020 - IPC B60M1/28 H01R4/66 H01R4/38 

FIELD: electrical engineering.

SUBSTANCE: invention is related to method of protective grounding of overhead system at replacement of rail-sleeper grid with wide front. Proposed method comprises grounding of contact suspension electrically connected with rails, portable earthing rods of contact network and artificial earthing devices submerged mechanically into soil at depth of not less than one meter at distance from each other of not more than 200 meters. At the same time contact suspension is additionally connected by means of earthing wires with earthing circuits: signal points, electric signaling posts, complete transformer substations and complete transformer substations of single-phase ones. At that earthing wire with copper equivalent cross-section of not less than 50 mm² can be used, as well as clamps of type KS-053 or KS-054.

EFFECT: higher electrical safety of personnel during operations.

4 cl, 1 dwg