SU885933A1 - Electric power line damaged section indicator - Google Patents

Description

(5) INDEX OF DAMAGED ELECTRICAL TRANSMISSION LINE

The device relates to electrical measuring equipment and can be used to determine the short-circuit overlap on the direct current transmission line. The closest to the proposed technical entity is a device for determining the place of overlap of the insulation of power lines, containing the magnetic core placed in the housing, the current sensing element and the latch 1. The disadvantage of the device is its limited capabilities due to the inability to use direct current on the power lines. The purpose of the invention is the expansion of functional capabilities. The goal is achieved by the fact that in the index containing the magnetic core placed in the housing, a current-sensing element and a clamp, a movable permanent magnet mounted in the housing on the semi-axis, one of which is provided with a directional arrow, is used as the current-sensitive element, pin with the possibility of entry of a locking washer, movably mounted on the body guides, and in the magnetic circuit, a channel for the ground wire of the transmission line is made. The drawing shows the proposed pointer, mounted on the ground wire. The pointer consists of a permanent magnet 1 with an index arrow 2 fixed with it, a pin retainer 3 fixed by a washer, housing 5 in the cover of which magnetic circuit 6 is fixed, through the holes in which the ground wire 7 passes. The pointer works as follows.

In the initial state, the poles of the permanent magnet 1 are directed along the path of the line under investigation, and its position is fixed by the washer t.

When a part of the short circuit current flows through the ground protection cable 7, the locking washer k from a magnetically strong electrical steel is attracted to the magnetic circuit 6 and releases the pin retainer 3 and the constant current of the cable 7 interacts with the magnetic field of the magnet 1 and unfolds it, and with it index arrow 2 at an angle of 90. After the cessation of short circuit current, the locking washer 4 is lowered and thus does not allow the movable part to spontaneously turn, for example, under the action of the wind.

To return the device to its original position, it is necessary to shrink the pointer 2, thereby releasing the pin retainer 3 from engagement with the washer k and turn the moving part (magnet 1, the pointer 2 and retainer 3) to its original position,

Pointers are mounted on the propelling cable of a DC power line at a distance of

from each other, determined by the magnitude of the short-circuit current, spreading it along the grounding of the supports and the sensitivity of the indicator.

Claims (1)

Claims of the damaged portion of the transmission line, containing magnetic cores placed in the housing. A current sensitive element and a clamp, characterized in that, in order to extend the functionality, a permanent magnet mounted in the housing on the semi axes, one of which is used, it is equipped with a directional arrow, and the other - with a retainer, made and rearward with the possibility of entering a retaining washer, movably mounted on guide covers to rpusa a magnetic circuit is formed in the channel for grounding wire transmission line. Sources of information taken into account during the examination 1. Borukhman, VA, Kudr, A. A. and Kuznetsov A.N. Devices for locating damage on overhead power lines, Moscow, Energia 1973, p. 58.