Arc chute and automatic circuit breaker equipped with this arc chute

FIELD: electricity.

SUBSTANCE: arc chute (4) comprises an arc-quenching chamber (21) formed by a package of deionising plates (22), and an arc-generating chamber (11) restricted with the first and the second flanges (12, 13), besides, the arc-quenching chamber comprises permanent magnets, at least partially arranged behind the first flange (12). The arc-generation chamber (11) comprises a higher induction section (31), in which the arc moves towards the arc-quenching chamber by the first part (32, 33) of permanent magnets, and a diverging section (51), in which the arc diverges to the first flange by the second part (52) of the permanent magnets, besides, the magnetic field in the longitudinal average plane developed by the second part, is substantially weaker than the field developed by the first part. An automatic circuit breaker is also disclosed, comprising opened contacts (1, 2) and the arc-quenching chamber described above.

EFFECT: improved reliability of arc quenching and current interruption.

11 cl, 2 dwg

 

The technical field

The present invention relates to the distribution device, and in particular, to a device that interrupts the direct current, in particular low-intensity currents, i.e. currents the value 05 to 150A.

The invention relates in particular to the arc chamber of the circuit breaker containing the damping of the arc formed by the package deionizers plates, and the camera forming an arc bounded by the first and second flanges, and the arc chamber has permanent magnets located behind at least the first flange.

The invention also relates to a circuit breaker containing razmykaetsya contacts and arc chute, which extinguishes the arc is formed at the opening of the mentioned contacts.

Prior art

The camera forming the arc interrupter chamber is essentially located between the contact zone and arc-quenching chamber. In the contact zone forming the arc is initiated by opening the above-mentioned contacts. Usually one contact is made movable, and the other contact is stationary. The contact zone essentially provides a means to catch up arc, in most cases, the electrodes or horn gaps, which provide separation of the arc from the contacts and deleted the e in the arc chute. Arc, as a rule, moves into the space bounded by two flanges, made of electrically insulating material between the contact zone to deionizers plates interrupter chamber.

When an interrupt is provided by a strong alternating or direct current, i.e. a current whose value is more than 150A, the electromagnetic force induced by the current in one of the conductors connected to the contacts on the merits sufficient to promote the arc and its quick removal to deionizers plates interrupter chamber.

But if the interrupt is provided a gentle constant current, the electromagnetic force may be insufficient for the proper promotion of the arc and its removal to deionizers plates.

In the patent application FR 2622736 disclosed circuit breaker with arc chamber containing permanent magnets located between one of the flanges of the camera forming the arc and the adjacent wall of the housing of the circuit breaker. A permanent magnet ensures the promotion of the electric arc generated when the interrupt slack DC.

One of the disadvantages of the interrupter chamber is that the magnetic field of the permanent magnet is sometimes insufficient for the proper promotion and removal of an electric arc in dosagecialis the camera. In addition, the magnetic field generated by a permanent magnet that can draw an arc to the flange around the magnet and prevent its advancement and destruction in the arc chute.

The invention

The present invention is to eliminate the disadvantages of the arc chambers of the prior art through the use of aid interrupter chamber for a circuit breaker containing the damping of the arc formed by the package deionizers plates, and the camera forming an arc bounded by the first and second flanges located essentially at the same distance from the longitudinal mid-plane, and the arc chamber has permanent magnets at least partially located behind the first flange and the camera forming the arc contains the first section of the high induction and deflecting section between the section of increased induction and Luggage blowout.

In the arc chamber according to the invention

section increased induction contains the first part of permanent magnets which generate a magnetic field in the longitudinal Central plane of said section, providing the opportunity to promote the electric arc, and the first part of permanent magnets includes two magnetized parts behind each flange;

Atlantyda the section contains the second part of permanent magnets, creating essentially a weaker magnetic field in the longitudinal Central plane of the said section in comparison with the field generated by the first part of permanent magnets, and provides the possibility of deviation of the electric arc from the longitudinal mid-plane.

The first and second flanges are preferably located essentially at the same distance from the longitudinal mid-plane. Two magnetized parts, the first part of the permanent magnets preferably create a magnetic field essentially the same tension. Two magnetized parts, the first part of the permanent magnets preferably are disposed symmetrically with respect to the longitudinal middle plane of the camera forming the arc.

According to one variant embodiment of the invention at least one part of the second part of permanent magnets located behind the first flange, resulting in a magnetic field created by this part, exceeds field created by another part of the second part of permanent magnets. The entire second part of permanent magnets are preferably located behind the first flange.

Diiodotyrosine plates preferably have a front edge with a Central recess and at least one side part facing the deflecting section, while the electric arc in the deflecting section is directed to the KJV is anotai side. The distance between the second part of the permanent magnets and the side part of the rear edge deionizers plates preferably less than 1 mm.

According to a variant embodiment of the invention, the first flange is made of a ceramic material. The second flange is preferably made of an organic material emitting gas.

The invention also relates to a circuit breaker containing razmykaetsya contacts and arc chute for extinguishing the arc formed when the opening operation of the above-mentioned contacts, and arc chamber is a chamber as described above.

Brief description of drawings

Advantages and features of the present invention are explained in the description below, a preferred variant of the invention, which are given only as non-limiting examples and are presented in the attached drawings.

Fig. 1 depicts a portion of the pole unit of the circuit breaker with arc chamber according to the invention.

Fig. 2 - part pole unit circuit breaker (cross-section)made on the longitudinal axis a-a' in the longitudinal mid-plane according to the invention.

Detailed description the preferred option of carrying out the invention

Pole block (Fig. 1 and 2) to match the optical switch includes a movable contact 1 and the fixed contact 2, each contact is connected by a conductor connecting the output of the circuit breaker. The command to open movable contact may come from the actuator knob or release means (not shown). Release means include electromagnetic release and heat release for automatic disconnection of the rolling contact 1 in the event of an overload or short circuit.

The elements of the circuit breaker, such as razmykaetsya contacts, the actuation and release means are accommodated in the housing 3, formed of an insulating material. As shown in Fig. 2, the housing 3 also contains the arc chute 4, which extinguishes the arc is formed between razlichimie contacts during breaking.

Arc chamber 4 includes a camera 11, the formation of the arc, which is limited to the first flange 12 and a second flange 13, and the flanges are essentially parallel. The flanges 12 and 13 are located at the same distance from the longitudinal mid-plane 10, which forms the longitudinal axis a-a'. One of the conclusions of the pole unit of the circuit breaker electrically connected to the fixed contact 2 and passes from the electrode or horn spark gap 14, which takes place in the upper part of the chamber forming the arc. Another Odenwald pole unit of the circuit breaker, electrically connected with a movable contact 1 is connected to the other electrode or horn spark gap 15, which is held in the lower part of the chamber forming the arc. Electrodes or horn gaps 14 and 15 are located with the opportunity to catch up arc generated between contacts 1 and 2, when they will open. Electric arc formed between the two contacts, picked up by the electrodes to move and delete in the camera 21 extinguish the arc interrupter chamber.

It should be noted that razmykaetsya pins 1 and 2 and the electrode 14 is shown in dashed lines because they are located behind the second flange 13. These contacts 1 and 2 are located in the longitudinal middle plane 10 at equal distances from the first and second flanges. The distance between the movable contact 1 and the electrode 15 in the lower part of the chamber forming arcs are usually 4 - 8 mm, This distance provides good performance for interrupting strong currents.

In the described example, the camera 21 extinguish the arc formed by the package deionizers plates 22, which, as a rule, are metal plates. Diiodotyrosine plate 22 have a front edge, on which the electric arc into the chamber of the arc extinction. Front edge deionizers plates contains, as a rule, the Central recess 23.

When interrupting high current magnet is th induction, created by the current in the electrodes 14 and 15, is usually sufficient to remove the arc in the chamber 21 of the arc extinction.

When you interrupt a gentle current magnetic induction created by the current in the electrodes 14 and 15, is insufficient to remove the arc in the chamber 21 blowout and therefore the application of a magnetic field generated by a permanent magnet, becomes mandatory.

In accordance with the first characteristic of the invention, the camera of the formation of the arc section contains 31 high induction, in which the arc is moved into the chamber 21 of the arc extinction under the action of the magnetic field generated by the first part of permanent magnets. The magnetic field in the longitudinal middle plane of the camera forming the arc created by the first part of permanent magnets section increased induction exceeds the magnetic field created by another part of the permanent magnets in the rest of the camera forming the arc. This configuration improves the electric arc causes the arc to leave razmykaetsya contacts. Switching the Foundation of the arc between the movable contact and the electrode 15 mainly provided by the first part of permanent magnets section increased induction chamber forming an arc.

In Fig. 2 move the electric arc are represented by dots in different moments. In section increased induction electric the UGA represented by points 41 and 42.

In the described embodiment, the first part of permanent magnets contains not only the first magnetized portion 32, but also the second magnetized portion 33. Magnetized parts 32 and 33 are located behind each of the flanges 12 and 13. The magnetic part of the first part of permanent magnets is defined in relation to the first mentioned part of the permanent magnets, i.e. in relation to part of the permanent magnets section increased induction. The second magnetized portion 33 of the first part of permanent magnets creates a magnetic field, which is summed with the field generated by the first magnetized part 32. This significantly increases the magnetic force induced by the first part of permanent magnets for electric arc. Therefore, the second magnetized portion 33 of the first part of permanent magnets allows you to switch the base of an electric arc between the movable contact 1 and the electrode 15 and allows removal of the electric arc in the chamber of arc extinction. The distance D between the movable contact 1 and the electrode 15 is compensated by the presence of the second magnetized portion 33.

In the described embodiment, shown in Fig. 1 and 2, the first and second magnetized parts 32 and 33 of the first part of permanent magnets create a magnetic field essentially equal e.g. the debts. Magnetic force that moves the arc in the direction of the camera 21 blowout, thereby doubling that allows you to promote arc faster to the camera blowout.

In the embodiment of Fig. 1 and 2, the first and second magnetized parts 32 and 33 of the first part of permanent magnets are disposed symmetrically with respect to the longitudinal mid-plane 10 of the camera forming the arc. This fact also improves the above-mentioned properties, i.e. more effective promotion of the electric arc in the camera blowout.

According to the second feature of the invention the chamber 11 forming the arc contains deflecting section 51, in which the electric arc is deflected relative to the longitudinal mid-plane 10 camera forming an arc to the first flange 12 and the magnetic field generated by the second part of permanent magnets. The magnetic field created by the second part of permanent magnets, substantially weaker than the field generated by the first part of permanent magnets. As the magnetic field in the longitudinal mid-plane 10, created the second part of permanent magnets, weaker fields the first part of permanent magnets and asymmetrically relative to the longitudinal mid-plane, the electric arc is deflected from its trajectory. Deflecting component of the electric arc mainly through the Torah part of the permanent magnets in the yoke section 51.

In this embodiment (Fig. 1 and 2) the whole of the second part 52 of permanent magnets located behind the first flange 12. In other embodiments, the implement (not shown) only the magnetized part of the second part of permanent magnets may be located behind the first flange and therefore the magnetic field generated by the mentioned magnetized part exceeds the field created by the rest of the magnetized part of the second part of permanent magnets, and it is located behind the second flange 13. The magnetized part of the second part of the permanent magnets is defined in relation to part of the permanent magnets in the yoke section.

In deflecting section 51 (Fig. 2) the points 61, 62, 63, 64 and 65 represent the position of the arc deflecting section at different moments. These points move to the first flange 12, as the second part 52 of permanent magnets provides the possibility of rejection of an electric arc. Thus, the electric arc moves to the first flange 12 and thus retains sufficient magnetic force along the longitudinal axis a-a', so as not to get and stay in contact with him.

Front edge deionizers plate has a Central recess 23 and the two side pieces 71 and 72 directed toward the deflecting section 51 of the camera forming the arc. Electric arc aimed at deflecting the eccii to the side surface 71.

When you interrupt a strong DC or AC arc usually must be in the camera blowout through the Central recess. This allows an electric arc to deinitialise in the middle of the camera blowout, to dissipate the maximum amount of energy.

When you interrupt a gentle current electric arc is usually included in the arc chute as quickly as possible, in order not to remain and to dissipate energy in the cell formation of the arc, i.e. in front of the camera blowout. In case of interruption of slack current electric arc can be extinguished on the side 71 of the front edge of the camera 21 arc extinction due to the small amount of dissipated energy.

The distance between the second part 52 of the permanent magnets and the side part 71 deionizers plates preferably less than 1 mm, This distance is small enough that the electric arc could not go out in the chamber of the formation of the arc.

The flanges 12 and 13, limiting the camera forming the arc, usually made of electrically insulating material. To get a good patch of wear resistance with moderate DC, with relatively long periods of interruption compared to AC flanges can be formed from electrically insulating material, resistant to erosion, for example of such a ceramic material such as steatite. To ensure good interrupts strong AC and DC flanges can be executed from the emitting gas electrically insulating material, such as nylon, emit gas.

The first flange 12 is preferably made of a ceramic material, and the second flange 13 is made of an organic material emitting gas. Gas-emitting flange increases the pressure in the contact zone, facilitating removal of the electric arc from the contact zone into the camera blowout.

Arc chamber includes first and second permanent magnets located respectively behind each of the flanges 12 and 13. A magnet placed behind the first flange 12, passes over the section of increased induction and deflecting sections of the chamber forming an arc, and the magnet is placed behind the second flange 13, passes over a section of increased induction. In this case, the first part of permanent magnets section increased induction is essentially formed by the first magnet, i.e. magnetized part 32 and the magnetized part of the second magnet section increased induction, i.e. magnetized shares 33. Similarly, the second part of permanent magnets deflecting sections being formed of a magnetized part of the second magnet in the yoke section, i.e. magnetized share of 52.

The invention also provides wholesaling camera contains two permanent magnet located behind the first flange, respectively, in sections increased induction and deflecting section, and the magnet section increased induction creates a magnetic field substantially more intense than the deflecting section.

The invention also provides an arc chamber containing three permanent magnet, and the first and second magnets are located behind the first flange, respectively, in sections increased induction and deflecting section, and a third magnet located behind the second flange section increased induction.

1. Arc chamber (4) for a circuit breaker containing chamber (21) extinguish the arc formed by the package deionizers plates (22)and the camera (11) forming an arc bounded by the first and second flanges (12, 13)located on each side of the longitudinal mid-plane (10) of the said chamber, and arc chamber contains permanent magnets, at least partly located behind the first flange (12), characterized in that the camera forming the arc contains the first section (31) increased induction and deflecting section (51) between the section advanced induction and camera (11) arc extinction, while
section (31) increased induction contains the first part of permanent magnets which generate a magnetic field the longitudinal Central plane of said section, providing the opportunity to promote the electric arc, and the first part of permanent magnets includes two magnetized parts (32, 33)located behind each of the flanges (12, 13),
deflecting section (51) contains the second part (52) of permanent magnets, creating a much weaker magnetic field in the longitudinal mid-plane section than the field generated by the first part of permanent magnets, and provides the possibility of rejection of an electric arc with respect to the longitudinal mid-plane.

2. Arc chamber according to claim 1, characterized in that the first and second flanges (12, 13) are located essentially equidistant from the longitudinal mid-plane (10).

3. Arc chamber according to claim 2, characterized in that the two magnetized parts (32, 33) of the first part of the permanent magnets create a magnetic field, essentially the same tension.

4. Arc chamber according to claim 2 or 3, characterized in that the two magnetized parts (32, 33) of the first part of permanent magnets are disposed symmetrically with respect to the longitudinal mid-plane (10) of the camera forming the arc.

5. Arc chamber according to claim 1, characterized in that at least a portion of the second part of permanent magnets located behind the first flange (12), the magnetic field generated by the mentioned magnetized part, etc which increases the magnetic field, created the rest of the magnetized part of the second part of permanent magnets.

6. Arc chamber according to claim 5, characterized in that the whole of the second part (52) of permanent magnets located behind the first flange (12).

7. Arc chamber according to claim 1, characterized in that diiodotyrosine plate (22) has a front edge with a Central recess (23) and at least one side part (71), directed to the deflecting section (51), while the electric arc is aimed at deflecting section to the mentioned side.

8. Arc chamber according to claim 7, characterized in that the distance between the second part of permanent magnets and a lateral part (71) of the leading edge deionizers plates (22) is less than 1 mm.

9. Arc chamber according to claim 1, characterized in that the first flange (12) made of a ceramic material.

10. Arc chamber according to claim 9, characterized in that the second flange (13) is made of an organic material emitting gas.

11. Circuit breaker containing razmykaetsya contacts (1, 2) and the arc-suppressing chamber (4) to extinguish the arc formed when the opening operation of the above-mentioned contacts, wherein the arc chamber made in accordance with one of claims 1 to 10.



 

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15 cl, 10 dwg

FIELD: electrical engineering.

SUBSTANCE: invention relates to components of switching hardware, particularly DC switch. DC switch independent magnetic blow-out device on permanent magnets consists of permanent magnets and magnetic core. Every magnetic pole incorporates U-like horns. One pole of magnetic core is fitted between bifurcated horn parts of every electric pole, while another one is located at the bottom and aside of aforesaid U-like horns.

EFFECT: higher reliability of arc control due to DC arc blow-out in preset direction at whatever arc current direction.

3 dwg

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