Arc control chamber

FIELD: electrical engineering.

SUBSTANCE: chamber comprises two isolated LH and RH sets of metal plates separated by air gap. It comprises also first group of RH and LH sets of insulating plates separated by air gap. Note here that metal plates seat in symmetry with the axis passing between LH and RH sets of aforesaid plates, the upper LH and RH plates being interconnected by current conducting bus. In compliance with this invention, second group of LH and RH sets of plates are additionally introduced. Note here that LH and RH sets of insulating plates of first and second group are jointed to LH and RH sets of metal plates to make air gaps aligned and allowing formation of two-way through cooling channels perpendicular to electric arc.

EFFECT: intensive arc cooling, higher efficiency of suppressing induction currents.

2 dwg

 

The present invention relates to electrical engineering, in particular to circuit breakers DC. Circuit-breakers DC interrupter chamber is used to increase the breaking capacity (Aigoual. Fast-acting circuit breakers. M.-L. : publishing house "Energy", 1964, p.142, RIS). Given a camera having a wedge-shaped, diverging from the center along the radius of alternating baffles increases the breaking capacity of the circuit breaker, but has large dimensions.

Closer in design is the arc chamber with the left and right sets of parallel spaced metal plates and block-out blinds, which is connected to the left and right sets of metal plates through the insulation (Muradov IS, the same CENTURIES, Seredka R.E. Automatic high-speed switches for trolleybuses. Ekaterinburg: printer, 2005, pp.118, 41). This camera is selected as a prototype, provides safe shutdown short circuit currents, but does not provide one hundred percent off small constant inductive currents, which may cause overlapping of the positive opening operation space. This is because in the prototype heat from the arc depends on safe shutdown of small post is permanent inductive currents, difficult, because the ionized gases must pass through deionization lattice (isolation) and to reach the left and right sets of metal plates, i.e. the path of movement of ionized gases is large.

The present invention allows to reduce thermal resistance in the circuit of the cooling ionized gases.

The technical result of the invention is that it decreases thermal resistance of the heat sink from the ionized arc gases, increases the intensity of the cooling of the arc and increases the efficiency of small damping constant inductive currents.

The invention consists in the following. We have introduced the second group of the left and right sets of insulating plates, while the left and right sets of insulating plates of the first and second groups with the two sides connected respectively with the left and right sets of metal plates so that air gaps are metallic and insulating plates coincide with each other and provide in the left and right sets of insulating plates perpendicular electric arc two-way end-to-end cooling channels, which also reduces its thermal resistance. As a result of increasing the intensity of the cooling of the arc and increases the efficiency of small damping constant inductive currents, it is here provided the claimed technical result.

Arc chamber shown in figure 1 and consists of two, left and right symmetrical sets of metal plates 1, are installed in the slots of the end walls 2, 3. Metal plates separated by an air gap with the help of the cheeks 4 installed on the bottom 5. In the upper part of the chamber in the grooves is conductive bus 6 connecting the upper left and right metal plates. Luggage cover is closed 7.

On both sides of each, left and right, a set of metal plates are insulating plate 8, also mounted in the slots of the end walls 2, 3, the air gap insulating plates coincide with the air gaps of metal plates.

Camera work when you disable the short circuit current is as follows.

By opening contacts 9 of the circuit breaker arc under the action of magnetic blast, electro-dynamic and aerodynamic forces generated by the arc moves to the first contact, and then the arc horns 10, which are located under the metal plate 1 and figure 1 are shown by the dotted line. Next arc is sequentially transferred to the metal plate to the circuit on the conductive bus 6, due to thermal cooling channels formed by the arrangement of the insulating plates, is effective the first heat of the heated gases, after that arc, cooled, goes out.

The location of thermal resistance of the cooling channels is shown schematically in figure 2, when viewed from above the camera, while in figure 2, a) shows thermal resistance of the heat sink Rt lionand Rt rightsfor the left and right sets of metal plates in the prototype, as in figure 2, b) - thermal resistance of heat sink Rt1 lion, Rt2 lionand Rt1 rights, Rt2 rightsalso for the left and right sets of metal plates in the present invention, where it is seen that thermal resistance of the heat sink from the ionized arc gases in the second case is considerably smaller.

Camera work by disabling small constant inductive currents differs in that when the damping, especially if these currents reverse direction, the arc is stretched and cooled mainly due to aerodynamic forces, as in the case of small currents electrodynamic force is small and the magnetic blast works poorly. It is important to facilitate the occurrence of arcs of small current into the camera. This contributes to reducing the size of metal plates cameras through the use of insulating plates and the increase in cooling efficiency due to the formation of additional cross-cutting channels of the heat sink.

Thus, through the use of insulating plates on both sides of the metal the ski plane and reducing the metal of the camera decreases thermal resistance of the heat sink from the ionized arc gases, increases the intensity of the cooling of the arc and increases the efficiency of small damping constant inductive currents.

Arc chamber, consisting of two insulated from each other left and right sets of metal plates with an air gap between them, as well as the first group left and right sets of insulating plates with an air gap between them, and these sets of metal plates are arranged symmetrically with respect to an axis of symmetry passing between the left and right sets of metal plates, and the upper left and right metal plates interconnected conductive bus, characterized in that the introduced second group of the left and right sets of insulating plates, while the left and right sets of insulating plates of the first and second groups with two sides connected respectively with the left and right sets of metal plates so that air gaps are metallic and insulating plates coincide with each other and provide in the left and right sets of insulating plates perpendicular electric arc two-way end-to-end cooling channels.



 

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FIELD: electrical engineering.

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FIELD: electrical engineering.

SUBSTANCE: chamber comprises two isolated LH and RH sets of metal plates separated by air gap. It comprises also first group of RH and LH sets of insulating plates separated by air gap. Note here that metal plates seat in symmetry with the axis passing between LH and RH sets of aforesaid plates, the upper LH and RH plates being interconnected by current conducting bus. In compliance with this invention, second group of LH and RH sets of plates are additionally introduced. Note here that LH and RH sets of insulating plates of first and second group are jointed to LH and RH sets of metal plates to make air gaps aligned and allowing formation of two-way through cooling channels perpendicular to electric arc.

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15 cl, 10 dwg

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