SU1403130A1 - Device for extinguishing electric arc between switch contacts - Google Patents

Abstract

This invention relates to a high voltage technique and is intended for use in high voltage electrical apparatus. The purpose of the invention is to increase efficiency by accelerating arc extinction. A device for extinguishing an electric arc between the contacts of a switch comprises a housing with a reservoir 2 high-pressure gas with a stationary and movable contacts with a drive. The fixed contact 5 is located in the cylindrical recess 3 of the insulator 4 and is made with channels 6 through the check valve 7 connecting the recess of the insulator with the low pressure reservoir 8 on the housing. The guides 9 of the movable cylindrical contact 10 are placed on the pressure vessel. 2 Il. (I

Description

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; This invention relates to a high voltage technique and can be used in high voltage electric apparatus for isolating arc suppression and heat removal.

The purpose of the invention is to increase efficiency by accelerating arc extinction.

Fig, 1 shows the device when the contacts are on; 2 - the same, with the contacts disconnected, I A device for extinguishing an electric arc between the contacts of a switch j l consists of a housing I with a reservoir

rum 2 high pressure gas. In the I cylindrical recess 3 of the insulator 4 there is a fixed contact 5 on the body. with a low pressure 8 on the housing. The guides 9 of the movable actuator cylindrical contact 10 i are placed on the high-pressure reservoir.

The device works as follows.

I When the switch is triggered, when the cylindrical movable contact ilO is separated from the fixed contact 5 by the drive and is displaced along the guides 9 in the cylindrical recess 3 of the insulator 4 on the housing 1, between the contacts where the arc appears, a region of strong discharging The valve 7 separates the Strong Discharge area between the contacts IB of the cylindrical recess and the reserve. Boar 8 low pressure. The state of the medium between the contacts close to

depth of fy to vacuum, provides disruption of the arc from the moving contact, its extinction.

At the moment when the moving contact emerges from the cylindrical recess 3, the jet of SF6 gas from the high pressure reservoir 2 rushes into the area of strong discharge. The check valve 7 is activated, forming a stream through channels 6 into the tank 8 of low pressure. The remains of the quenching arc are entrained by the SF6 gas, crushed, crushed and finally quenched.

The proposed device is fast and reliable to extinguish the arc at high voltages at the contacts of the switch.

Claims (1)

Invention Formula A device for extinguishing an electric arc between the contacts of a switch, comprising a housing with a high pressure SF6 gas tank with fixed and movable contacts with a drive, characterized in that, in order to increase efficiency by accelerating the arc extinguishing, the fixed contact is located in the cylindrical recess of the additionally introduced insulator and is provided with channels connecting, through the additionally introduced check valve, the recess of the insulator with the upper reservoir of low pressure located on the housing, and The movable contact is cylindrical and placed in a high pressure reservoir on additionally introduced guides. eight  3 9 fO dzig.2