RU1815714C - Protector tube - Google Patents

Abstract

SUBSTANCE: between the ends of the washer-shaped electrode and the insert facing each other, a conductive pipe with at least one through radial hole is arranged with an annular gap to the inner surface of the housing. 1 silt;

Description

The invention relates to electrical engineering and relates to the construction of high voltage arresters designed to protect the insulation of electrical equipment from lightning surges.

The aim of the invention is to increase the reliability of the tubular discharge by eliminating external overlaps.

The drawing shows a General view of the sack in section along its longitudinal axis.

The spark gap contains a cylindrical insulating casing 1 with a closed 2 and an open Z. conductive tips, an arcing insert 4 of gas generating material, installed in the housing 1 with a gap 5, a rod electrode b, resting its own glass 7 on the duct of the arcing channel 8, conductive branch pipe 9 with openings mi 10. washer-shaped electrode. 11, the closed spark gap H and the contact leads 12m 13,

The slug works as follows. When running on a thunderstorm

overvoltage waves breakdown occurs in its closed H and open (in Fig. not shown) spark gaps through ko. The pulse current begins to flow. An accompanying current of industrial frequency begins to pass along the ionized path of the pulsed discharge, and an electric arc is established at both gaps of the arrester, supported by the operating voltage of the network.

The electric arc of the closed gap H between the rod electrode 6 and the upper end of the pipe 9 burns the walls of the arcing channel 8. During thermal decomposition, the walls of the channel 8 are rapidly released in a large amount of gas and high pressure is created in the channel, reaching several hundred atmospheres. This pressure causes intense blowing along the strobe of the electric arc through the open tip 3 into the atmosphere. The suppressor arc at the first or second transition of the current through the zero value, and the arrester becomes ready for the next operation.

45k

Tests for the switching ability of two prototype 110 kV prototype dischargers, performed in accordance with the claimed solution, showed high reliability (no external overlaps) when the current was switched off 12.5 kA.

Claims (1)

SUMMARY OF THE INVENTION A tubular discharger comprising a cylindrical insulating housing, at one end of which an open conductive tip is mounted with a washer-shaped electrode, at the other end of which is a closed conductive tip with a rod electrode mounted in the axial channel of the cylindrical arcing insert, coaxially mounted 5 recessed inside the housing with an annular gap with respect to its inner surface, characterized in that, in order to increase the reliability of operation, between the ends of the washer-shaped electrode and the insert facing each other, an additionally introduced conductive conductor located with an annular gap with respect to the inner surface of the housing is installed a pipe whose length is chosen to be greater than or equal to the length of the open conductive tip in contact with the outer side surface of the insulating housing, and in the pipe wall has at least one through radial hole.