SU1458900A1 - Arc-extinguishing device - Google Patents

Abstract

The invention relates to electrical engineering, in particular to high-voltage switching equipment. The purpose of the invention is to reduce the mass of the moving contact, without increasing the duration of the electric arc. The arcing device contains a movable 2 in the form of a rod and a stationary 3 arresting coils, in parallel with which a thyristor branch 5 is connected. spirals with isolated turns and fastened in an additional sleeve 8, mounted on the first contact sleeve 9. From the fixed contact 3, the resistance 7 is electrically connected to the additional part itelnoy contact sleeve 8, and by its inner surface, from the contact surface of the first sleeve. 9 resistance 7 isolated with insulating sleeve 10. 1 sludge. S

Description

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about

This invention relates to electrical engineering, in particular, to high voltage switching devices.

The purpose of the invention is to reduce the ma-zero thyristors, and the circuit is then ....,, fH

MOVE contact without increasing the duration of the electric arc.

The drawing shows an arc-suppressing device for a high-voltage AC switch.

The arcing device 1 contains an action in the form of a rod 2 and a stationary 3 with an integrated nozzle 4

arcing contacts, thyristor-15 of the device and the switch as a whole, branch 5, connected in parallel- Simultaneously appears movable 2 and fixed 3 contacts, sliding socket contact 6, mounted on rod 2. Resistivity 7 is made in the form spiral-20 with insulated coils and secured in an additional contact sleeve 8 located on the shaft contact sleeve 9. On the side and bottom, the resistance 7 is isolated through 25 with an integrated nozzle arc suppressor of the insulation sleeve 10 according to s contact, the resistance in the form of additional venno 8 and 9 of the first spiral with isolated windings, the contact plugs .. A female contact thyristor

The arcing device is connected in parallel with an arcing device, as follows. 30. The extinguishing contacts, as well as the insulating and first contact bushes, characterized in that

In order to reduce the mass of the moving contact without increasing the duration of electric arc burning, an additional contact sleeve is inserted into the device, a socket contact is installed on the rod, an additional contact sleeve is fixed at 40 U fixedly mounted on the body of the first contact sleeve, there is a resistance between the said bushings i

ka is finally interrupted.

The invention makes it possible to reduce the mass of the movable contact, since only sliding contact is fixed on it. As a result, the mechanical loads on the moving contact and drive parts are reduced during the operation of the switch, the reliability of the arcing is increased.

over wide limits, change the design parameters of the resistance and its value.

Claims (1)

Claims Arcing device containing a body and placed in it moving in the form of a rod and stationary When moving the moving arcing contact 2 in the direction indicated on the drawing by the arrow attached to it contact 6 slides along the inner cylindrical forming resistance 7, smoothly entering. its in the circuit of the current. In this case, the voltage across the resistance 7 increases, the thyristor branch 5 is switched on and by the time of opening the contacts 2 and 3 and the formation of an electric arc, most of the current passes from the contact circuit to the thyristor one. After r disconnection of contacts 2 and 3, even a slight increase in voltage on the resulting electric arc leads to a rapid transition of the remaining part of the current to thyristor branch 5, since the resistance of the thyristors involved is minimal. In / result conditions are created for 35 45 50 electrically connected to the additional contact bushing, and insulated from the side and from the bottom by means of an insulating sleeve, respectively, from the additional and first contact bushing, the inner diameter of the resistance is equal to the outer diameter of the socket contact. fast extinction of the electric arc and deionization of the contact gap. When the current passes through ka is finally interrupted. The invention makes it possible to reduce the mass of the movable contact, since only sliding socket contact is supported on it. As a result, the mechanical loads on the moving contact and drive parts are reduced during the operation of the switch, the reliability of the arcing is increased. devices and the switch as a whole. Simultaneously arcing contacts with a built-in nozzle, resistance in the form of a spiral with isolated turns, socket contact, thyristor over wide limits, change the design parameters of the resistance and its value. Claims arc suppressor device comprising a housing and placed in it a movable rod-shaped and stationary electrically connected to the additional contact bushing, and insulated from the side and from the bottom by means of an insulating sleeve, respectively, from the additional and first contact bushing, the inner diameter of the resistance is equal to the outer diameter of the socket contact.