RU1815689C - Arc control device of asymmetric blow-out of high-voltage gas-filled autocompression circuit breaker - Google Patents

Abstract

Usage: in electrical engineering, in suppression devices of high-voltage autocompression switches. The invention improves the reliability of switching. Improving the reliability during switching is ensured by the execution of additional movable contact with a fixed arcing along the lateral surface. 2 ill.

Description

The invention relates to electrical engineering, namely, arcing devices for asymmetric blowing of high voltage gas-filled autocompression switches.

The purpose of the invention is to improve reliability during switching.

Figure 1.2 shows the variants of the arrester of the asymmetric blowing of a high-voltage gas-filled autocompression switch, the upper part corresponds to the disconnected position, the lower part to the on position of the switch.

The non-symmetrical arcing device for blowing a high-voltage gas-filled autocompression switch (Fig. 1) contains the main, fixed 1 and movable 2 contacts, the fixed piston 3, the actuator rod 4, the stationary arcing contact 5 with the tip 6 and the movable arcing contact 7 / which is equipped with an additional a hollow metal contact 8 with a nozzle-like opening with a neck area equal to S. Contact 8 is spring-loaded with a spring 9. An exemplary nozzle 10c p is fixedly fixed to the movable main contact 2 with a cross sectional area of the neck of the insulating nozzle equal to Sue with 5 (0.15-0.5) 5Is. The fixed arcing contact 5, at the point of contact along its outer side surface with the additional hollow metal contact 8, has a cross-sectional area StT-S, and with the movable arcing contact 7, the cross-sectional area SH Zis (Fig. 1).

s

Yo

00

SL ON 00 O

Compression cavity K is located between the movable circuit-breaker system, including the insulating nozzle 10, movable contact 2, movable arcing contact, and the stationary piston 3.

In the construction of Fig. 2, at the point of contact with the stationary arcing contact 5 (along its inner side surface), the additional metal contact 8 has a cross-sectional area SK, in this case.

The interrupter device of the switch (Fig. 1,2) works as follows.

When a trip command is issued, the actuator is triggered and rod 4 moves the moving system of the switch from left to right. First, the main contacts 1,2 open. then, the current is transferred to the contact zone of the stationary arcing contact 5 and the movable arcing contact 7. As the movable system of the switch relative to the stationary piston 3 moves, the SF6 is compressed in chamber K. When the arcing contacts 7 and 5 open, the zone the contact becomes the arcing contact 5 and the additional metal contact 8. The movement of the additional metal contact 8 is carried out by the arcing movable contact 7. When the contacts are 5.8 times are pressed, the contact zone becomes the tip 6 and the additional contact 8. At the moment of their opening, an arc arises,

which burns in the effective suppression zone.

When the switch is turned on, at the beginning there is contacting of the additional contact 8 with the tip 6, then contacts 8, 7 are turned on, and in the final stage the main contacts 1,2.

The contacting of the additional hollow metal contact 8 with the stationary arcing contact 5 is made on the lateral surface, which makes it possible to compensate for the mechanical and electrodynamic forces acting on the contacts 8.5 at the moment of collision, short-circuit current flow. and to increase reliability during switching compared to the end contact in the prototype.

Claims (1)

The claims An asymmetric arcing device for blowing a high-voltage gas-filled autocompression switch containing a movable and fixed main and arcing contacts, an insulating nozzle, while the movable arcing contact is equipped with an additional hollow metal contact, made with the possibility of movement, with the cross-sectional area of the nozzle neck S of the additional hollow metal contact 0.15-0.5) x 5ys, where Sue is the cross-sectional area of the neck of the insulating nozzle, characterized in that, for the purpose of Accelerating reliability when switching auxiliary contact contacting the fixed arcing contact formed on the side surface. ....