High-voltage arc-extinguishing chamber

FIELD: electricity.

SUBSTANCE: high-voltage arc-extinguishing chamber camera contains coupled insulating walls forming among themselves an input slot in the arch pre-stretching zone, arc-extinguishing devices in the arc-extinguishing zone, the top and bottom horns, two magnetic poles, the punched insulating plate inserted into a groove at the chamber output. The coupled insulating walls are pressed each as a single piece of separately located different arc-extinguishing materials, and the arc-extinguishing devices are designed as a lattice with the plates which have wedge-shaped cuts, begin from two different levels and at coming into this lattice the arch is split into short sections in two steps and dies away in the chamber, having no time to heat its coupled walls.

EFFECT: improvement of the disconnecting ability of contactors and decrease of switching over-voltages.

6 dwg

 

The invention relates to arc extinguishing chambers HV pneumatic and electromagnetic contactors electric rolling stock.

Known high-voltage interrupter chamber, consisting of two insulating walls, magnetic poles, and two rows of metal plates with lamagistere bars.

Electric arc under the action of electrodynamic forces and magnetic blast, having a narrow slit formed by insulating walls, enters the space between two rows of metal plates, and then an additional number of parallel plates disposed opposite the plates, do not cross the slit at a distance less than the width of the slit or (as an option) in penagaricano the grate plates which are arranged across the slit. (Copyright certificate №509905, CL. NN 9/36, H01H 33/10.)

A disadvantage of the known design interrupter chamber is that when the voltage is sharply increased conduction currents (leakage), the heating of the chamber that are the cause of slow arc, and the large size of the camera.

The closest to the claimed object is the arcing chamber containing the paired insulating walls forming between them an entrance slit in the area of pre-stretching of the arc interrupter device in the zone of arc, the top�rd and lower horns, two magnetic poles, covering the outside of the insulating wall, and a perforated insulating plate is inserted into the groove of the output of the camera. Each of the paired walls pressed as a single unit separately located from various arcing materials having in the region of the pre-stretching of the arc horns and stable poles increased mechanical and dielectric strength and low moisture absorption and in the zone of arc extinction, arc control devices increased stable arc resistance. (Patent No. 2290711, CL. NN 33/04.)

A disadvantage of the known design of high-voltage arcing chamber is a long, steady arc burning in a zigzag slit (the maze).

The aim of the invention is to reduce the length of the arc, increasing the breaking capacity of the contactor and the reduction of switching surges.

This object is achieved in that high voltage arcing chamber containing the paired insulating walls forming between them an entrance slit in the area of pre-stretching of the arc interrupter device in the zone of the arc, upper and lower horns, two magnetic poles, covering the outside of the insulating wall, and a perforated insulating plate inserted into the groove of the output (the maze) cameras, each �W of the coupled walls pressed as a single unit separately located from various arcing materials having in the area of pre-stretching of the arc horns and stable poles increased mechanical and dielectric strength and low moisture absorption and in the zone of arc extinction, arc control devices increased stable arc resistance, is characterized in that the interrupter device made in the form of a lattice with plates that have a wedge-shaped neckline, begin with two different levels and entry into this grid, the arc is divided into short sections in two installments.

New features of the proposed high-voltage arcing chamber, where interrupter device made in the form of a lattice with plates having a wedge-shaped neckline, begin with two different levels allow you to split an arc on short stretches in two steps, thereby reducing arcing time and reduce switching surges.

The essence of the claimed invention is illustrated by drawings, where

Fig.1 - high voltage arcing chamber;

Fig.2 - cross section a-A high voltage interrupter chamber;

Fig.3 - cross section b-B high-voltage interrupter chamber;

Fig.4 - grill with plates of high-voltage arcing chamber;

Fig.5 - the second side of the high voltage interrupter chamber;

Fig.6 - section b-b high-voltage interrupter chamber.

Net�offered high-voltage arcing chamber contains the paired insulating wall 1, 2, forming a wide gap δ1 with transverse insulating partitions 3, 4, 5, 15, 16, 17, oriented radially. Extreme partitions 3, 5, 15, 16 is formed with a bend on its axis toward the outside. The chamber wall 1, 2 separately located from various arc materials have rectangular protrusions 6, 7, 8, 9, which, alternating on the walls together to form additional arcing gap δ. Arcing horns 10, 11 are installed between the paired walls 1, 2 and the magnetic poles 12, 13, covering the camera from the outside and overlapping about half the area of the slit 51 with a transverse insulating partitions 3, 4, 5, 15, 16, 17 with two sides. Perforated insulating plate 14 is inserted into the groove of the output of the camera with the possibility of withdrawing its shift up without disassembling the camera. Grid plates 18, 19 having a wedge-shaped neckline, is coupled to the insulating walls 1, 2 in front of the perforated plate 14 and forms an arc slit 52 so that the arc when entering this grid is divided into short sections in two installments.

The works proposed high-voltage arcing chamber is as follows.

Upon opening the contacts of the device electrical arcing under its own electrodynamic forces and external electromagnetical, created by the blowout coil and the magnetic poles 12, 13, elongating, off of the contacts arcing horns 10, 11 and thrown in a high-voltage arc chute, freely walks into a broad gap 51 interrupter device with insulating partitions 3, 4, 5, 15, 16, 17, formed interrupter coupled walls 1, 2. Reaching the ends of the horns 10, 11, the arc moves through the insulating transverse rectangular protrusions 6, 7, 8, 9, skirting them further extended, touching the walls 1, 2 in a narrow slit 5 and is pre-cooled. Arc, pre-elongated and cooled, under its own electrodynamic forces and external electromagnetic forces generated by the blowout coil and the magnetic poles 12, 13, walks into the main arc extinguishing device made in the form of a lattice with the plates 18, 19, which have a wedge-shaped neckline, form a slit 52 and begin with two different levels, divided into short sections in two steps, cooled, and extinguished inside the chamber. Neither the arc nor any of its flames do not extend beyond the chamber, closed by a perforated insulating plate 14, and coupled heat insulating wall 1, 2, executed interrupter from different materials.

The proposed design of the camera allows for nominal and over�x currents to have a saturation magnetic poles 12, 13 to provide a stable magnetic field in the area of the arc, the speed of arc movement to wide slot 51, the intensity of the damping and negligible switching surges. At low currents the poles 12, 13 is not saturated and the main drop of magnetic potential is in the air gap in the area of the arc between the poles 12, 13, which allows to extend the range of switchable currents in small quantities. In both cases, provided reliable smooth entry of the arc into the wide slit 51, the stepped rectangular maze 6, 7, 8, 9 with the slit 5 and the lattice with the plates 18, 19, having a wedge-shaped cutout that starts with two different levels with the slit 52, the extinguishing of the arc at the output of the camera passes without sharp claps and damaging surges.

It should be noted that at the beginning of the arc, around the middle of the partition 4, 17, does not stop in the beginning of the intermediate walls 4, 17, and continues to move from the contacts on the horns 10, 11 and at the poles 12, 13, does not have time to burn through the walls 1, 2 chambers, to heat, is transferred to the interrupter device, coming from the zone of action of the external electromagnetic field of the arch, where extended electrodynamic forces and the forces generated by gases generated in the narrow slot, and fully extinguished within the lattice, with plates, which are wedge-shaped in�cut and start with two different levels.

Thereby achieving a reduction in the burning time of the arc, increasing the breaking capacity of the contactor and the reduction of switching surges.

High voltage arcing chamber containing the paired insulating walls forming between them an entrance slit in the area of pre-stretching of the arc interrupter device in the zone of the arc, upper and lower horns, two magnetic poles, covering the outside of the insulating wall, and a perforated insulating plate is inserted into the groove of the output of the camera, each of the paired walls pressed as a single unit separately located from various arcing materials having in the region of the pre-stretching of the arc horns and stable poles increased mechanical and dielectric strength and low moisture absorption and in the zone of arc extinction, arc control devices increased stable arc resistance, characterized in that the interrupter device made in the form of a lattice with plates having a wedge-shaped cutout that starts with two different levels, and when entering the arc lattice is divided into short sections in two steps.



 

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