SU1259356A1 - Vacuum arc chute for automatic circuit breaker - Google Patents

Abstract

The invention relates to the field of electrical engineering, in particular, to vacuum arc extinguishing chambers. The purpose of the invention is to simplify the design, manufacturing technology and increase reliability. The vacuum arc chamber contains a dielectric body in the form of a cylinder 1 and metal flanges 2, 3. A movable contact carrier 4 with a bellows 5 passes through the opening of the lower flange 2, and a fixed contact holder 7 passes through the opening of the upper flange 3. one turn of the current lead 8 and additional contactors of the dish-shaped form 9 with ring-shaped power contacts 10. The contact holders 9 with recesses in the middle part on the side of the contact surface and bent out the opposite side edges of the hemispherical sheet made of a material of high electrical conductivity, and the diameter of body 9 kontaktoderzha- larger than the diameter of the current lead 8 for reliable shielding. 1 il. (Ljo ate so oo ate O)

Description

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This invention relates to electrical engineering, specifically to vacuum interrupter chambers.

The purpose of the invention is to simplify the design, manufacturing technology and increase reliability.

The drawing shows the construction of a vacuum interrupter chamber (VDK).

VDK contains a shell comprising dielectric and metal parts. The dielectric part of the shell is made in the form of a cylinder 1, the metal part is in the form of rings (flanges) 2 and 3, which are vacuum tightly attached to the ends of cylinder 1. A moving contact holder 4 passes through the hole in the lower ring 2, the vacuum is tightly connected to the bellows 5, and to di- 15 atmospheric pressure. the electrical part 1 of the shell is attached to the screen 6. Through the hole of the upper ring 3 passes the fixed contact holder 7,

Inside the VDK shell, at the ends of the movable 4 and fixed 7 contact holders, there are 8 turns of current leads in a single turn, to which contact holders of a plate-like shape with outwardly bent outward hemispherical edges 9, with annular force contacts 10 are attached. Contact holders 9 form 25 arcing horns 11, which are zap1, ish.a t are the turns of 8 current leads from the arc falling on them.

The device works as follows.

When the contacts 10 are opened between them, a vacuum arc is formed, which goes out when the alternating current passes through zero or earlier, depending on the amount of current to be switched off.

When the ring-shaped power contacts 10 are touched, a current loop is formed, as a result of which, when the contacts are opened, the arc is blown onto the arcing horns 11 and rotates along their surface under the action of a radial magnetic field created by the oppositely directed turns of 8 inlets.

in the case of easy welding of the contacts 10, their rupture is facilitated by the dish-shaped shape of the contact holders 9, which have a small spring action, ensuring a certain mutual roll over of the contacts along their working

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surfaces, and due to pr material of coils 8 current

The spring properties of the 8 current leads also ensure mechanical wear and tear;

Contact holders of the 2 nd shape can be in stamping from sheet metal conductivity, commodity copper.

Opening the contact by a force applied to the current lead downwards, for example, electromagnet KiiyToe position of the contact

The use of VDK in nmatic switches to increase their hopes of size and simplify the laziness of contact systems

Claims (1)

Formula isob A vacuum arc suppressor automatically switches off the dielectric case of flanges, two spiral-shaped in opposite of the inlet, ring-shaped with a flat ring slab mounted on the cylinder holders, which simplifies the design, laziness and poppen on the contacts installed inserted disc-shaped with a recess in the middle contact surface from the outside to opposite. spherical edges, a material with a height, and each current in one turn of the material properties, and the holder has a current input diameter for reliable current Dov. atmospheric pressure. surface, and due to the spring properties of the material of the turns 8 current leads. The spring properties of the material of the turns of the 8 current leads also reduce the mechanical wear of the contacts by reducing the impact at the time of their closure. The contact holder 2 dish-shaped form can be made by stamping from a sheet of material of high conductivity, in particular from copper sheet. The opening of the V.KD contacts occurs under the action of a force applied to the movable current lead down the axis of the chamber, for example, an electromagnetic drive. Zim- KiiyToe contact position is provided atmospheric pressure. The use of VDK in low-voltage circuit breakers will significantly increase their reliability, reduce the size and simplify the manufacturing technology of the contact system. Invention Formula A vacuum interrupter chamber for a circuit breaker, containing a dielectric body with metal flanges, two spiral, counter-twisted in the opposite sides of the current input, ring-shaped power contacts with a flat annular working surface, mounted on cylindrical contact holders, , in order to simplify the design, manufacturing technology and ensure reliability, the power contacts are mounted on the additionally introduced dish-shaped contact-holders with recesses in the middle part from the side of the contact surface and with semi-spherical edges bent from the outside to the opposite side, made of a sheet material with high electrical conductivity, and each current lead is made in the form of a single turn of material with spring properties, and the disk contact holder has diameter greater than current lead diameter for reliable shielding of current leads.