Arc control chamber for automatic circuit breaker with arc gas exhaust channel

FIELD: electrical engineering.

SUBSTANCE: invention relates to arc control chamber 1 for automatic circuit breakers fitted onto circuit breaker base to envelope breaker movable contact end trajectory by set of arc suppressor plates 2 and spark plates 3 arranged ledge-like. Arc control chamber 1 consists of two-component box comprising housing 4 with arc suppressor plates 2 and spark plates 3, cover 5 with exhaust channel 6 is tightly attached to box sides. Perimetric cutout 7 is arranged at the beginning of channel 6 on interface of two-component box to receive at least one temporary filler 8 with holes. Said perimetric cutout 7 is made in cover 5 and has damping sides and lateral guide surfaces and at least one thrust ledge 13 for filler 8.

EFFECT: modular-design arc control chamber with no additional connectors and controlled arc suppressing conditions and efficient outburst of plasma on cutting off shot-circuit current.

3 cl, 2 dwg

 

The technical field

The invention relates to arc chamber for an electric device, in particular for circuit breakers and other switching devices.

Background of the invention

In electrical devices when disconnecting the short circuit current is the intensive development of the electric arc, which is an ionized gas plasma containing positive and negative ions. An electrical arc is distinguished by high current density, high temperature and a significant amount of radiation in a wide range. Electric arc intensively destroys the contact material by melting and spraying of this material. Contacts can undergo destruction, kinks, etc. due to the fact that they are also developing a large temperature gradient. It is therefore necessary to limit the impact of the electric arc on the contacts and extinguish the electric arc as soon as possible. In order to minimize the destruction of the contacts, an electrical arc shall as soon as possible transferred to the spark plate, and then the arc must be dynamically transferred to the arc plates of the arc-suppressing chamber. Critical for arc quenching factors are intensive cooling of the electric arc arc p is astname, as well as the conditions of pressure in the arc chamber.

From the point of view of design, known interrupter chamber is a device, for example, two lateral plates with holes, into which are inserted interrupter plate. In the transverse direction of the Assembly is fastened by rivets or screws or similar fasteners.

In another known construction interrupter chamber is made of two thermoset castings, i.e. from the base, in which the inserted arc plate, and cover that secures the choke plate. This concept does not allow to set in the interrupter chamber housing the filter and diiodotyrosine elements and, thus, to effectively create conditions of pressure and technologically efficient conditions affecting will extinguish an electric arc, and also in relation to the destructive effects of the plasma during its release into the environment of the electrical device.

Brief description of the invention

The basis of the present invention the goal is to create an arc chute with adjustable pressure conditions for arc quenching with an effective impact on the emission of plasma disabling short circuit current, as well as the creation of the interrupter chamber block design without the use of additional connecting elements, represents the soup a solid Assembly, does not require any protection from a possible meltdown, etc. this goal is achieved by a solution in accordance with the present invention, the essence of which is that the arc chamber consists of two boxes, consisting of a body with the arc plates and spark plates to the sides of which densely cover attached to the exhaust conduit, and at the beginning of the channel in the plane of section two boxes made perimetric slot intended for the insertion of at least one arbitrarily technologically effective filler with holes.

In accordance with the present invention, mainly, without additional inserts, before the peripheral slot in the exhaust duct is perforated transverse wall created by the cap manufacturer, technologically forming, for example, the filter element.

In accordance with the present invention, primarily for reliable and dense areas arbitrarily technologically effective element in the exhaust channel, it is important that the cover was made peripheral slot having a shock-absorbing side and the lateral guide surface and at least one thrust ledge for said at least one filler.

A brief description of the graph is centred on material

Other advantages and features of the invention are evident from the attached drawings, in which figure 1 is a vertical section through the center of the two boxes interrupter chamber with all the marked positions of the elements contained in it, including alternative filler installed in a peripheral slot in the exhaust duct cover interrupter chamber, and figure 2 is a view at an angle interrupter chamber in a disassembled state.

An example of carrying out the invention

Arc chamber 1 for electrical devices, in particular circuit breakers, not shown is inserted into the cavity at the base of the electrical device and comprises a set of spaced ledge arc plates 2 and spark plates 3 a trajectory path of the end shown movable contact of an electrical device.

Arc chamber 1 (Fig 1) consists of two boxes, consisting of a body 4 with arc-quenching plates 2 and spark plate 3 and the cover 5 with the exhaust channel 6, tightly attached to the case.

At the beginning of the exhaust channel 6, in the plane of section two boxes made peripheral slot 7, which is intended for insertion of at least one arbitrarily technologically efficient floor is Italia 8, for example, the filter element 9 and (or) deionizers element 10 with the corresponding holes (figure 2). Fillers 8 may be of different construction, of a nonmagnetic material or a lattice of magnetic metal and the like, including a different configuration of the perforation. By effectively combining the use of a filler 8 in the end, their displacement, for a given electrical device can effectively set the necessary conditions of pressure in the interrupter chamber 1, and, optionally, to eliminate unnecessary exposure of plasma electric arc will extinguish when disconnecting the short circuit currents within interrupter chamber 1 and at the exit of the exhaust channel 6.

In accordance with the present embodiment, the cover 5 two boxes made peripheral slot 7 (figure 2), with fillers 8 shock-absorbing side 11 and the lateral guide surface 12 and at least one thrust ledge 13, the warning arbitrary bounce filler 8 or a pair of filler 8 from the perimeter of the slot 7. In some cases, instead of the shock-absorbing side in the exhaust channel 6 before peripheral slot 7 can be shown perforated transverse wall itself creates, for example, the filter element 9 created directly is directly in the manufacture of the cover 5.

Arc chamber 1 is structurally designed as a two-component box, consisting of thermoset castings, and inside the housing 4 is provided by the guide ribs 14 that are intended to insert arc-quenching plates 2 and spark plates 3. Cover 5 interrupter chamber 1 holds interrupter plate 2 and the spark plate 3 from release and supports them in the right position its inner flange 15, which, in addition, two-component compacts box interrupter chamber 1 emanating from the diffusion of the interrupter chamber 1 in the immediate environment in the cavity of the electrical device. The inner flange 15 can have various other protrusions, such as protrusions 16, to lock the upper spark plate 3, etc. in Addition, the cover 5 regulates the release of gas through the filter element 9 and (or) demonicyoshi element 10 in the exhaust channel 6. The design of the interrupter chamber 1 does not involve the use of filter element 9 and deionizers element 10. Arc chamber 1 can operate without the use of these various technologically effective fillers 8.

On the front side of the housing 4 interrupter chamber 1 has a viewing window 17 not shown for movable contact of an electrical device.

1. Arc chambers is for electrical devices in particular circuit breakers inserted into the cavity at the base of the electrical device and covering a set of spaced ledge arc plates and spark plates trajectory path of the end of the movable contact of an electrical device, characterized in that it consists of two boxes, consisting of a body (4) with the arc-quenching plates (2) and spark plates (3), the sides of which are tightly attached to the cover (5) to the exhaust conduit (6), and in the beginning, in the plane of section two boxes made peripheral slot (7)intended for insertion of at least one randomly technologically effective filler (8) with holes.

2. Arc chamber according to claim 1, characterized in that the front peripheral slot (7) in the exhaust duct (6) is perforated transverse wall forming one of the fillers (8).

3. Arc chamber according to claim 1, characterized in that the cover (5) is executed peripheral slot (7), having a shock-absorbing part (11) and the lateral guide surface (12) and at least one thrust device (13) to filler (8).



 

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