CN201315253Y - High-voltage circuit-breaker - Google Patents

Abstract

The utility model discloses a high-voltage circuit-breaker which comprises a moving contact pedestal and a static contact pedestal, wherein, a moving contact and a static contact are respectively arranged on the moving contact pedestal and the static contact pedestal, a shielding ring correspondingly sleeved with the moving contact when the moving contact is in the off position is fixed on the moving contact pedestal, and the shielding ring is formed by connecting a port convex ring and a matching sleeve matched with the moving contact in an inserting manner. Therefore, the matching between the structure and the moving contact is more reliable, the electric field of the moving contact of the fracture is distributed more uniformly, not only the requirement of withstand voltage of the fracture is improved, but also the insulation level to the high-voltage electric appliance is also improved; and especially, the structure can meet the requirement of withstand voltage without changing the spacing, the dimension size and the electrode distance of the products, has higher versatility than the components of the original products and can keep the size of the original products.

Description

A kind of primary cut-out

Technical field

The utility model relates to breaker technical field.

Background technology

According to the reality of electric power system, the global shape of moving contact in high voltage breaker is better, and Electric Field Distribution is better relatively, generally can satisfy the requirement to proof voltage.But among the new standard DL/T593-2006 primary cut-out fracture proposed that higher proof voltage requires and to the requirement of High-Voltage Electrical Appliances insulating capacity.As shown in Figure 1, existing movable contact headstock 13 and the stationary contact headstock 14 of comprising, the primary cut-out product that is respectively equipped with moving contact 11, fixed contact 12 on movable contact headstock 13 and the stationary contact headstock 14 can not reach the peak demand in the new standard.Existing improvement way is to strengthen electrode distance, but makes the parts volume become big, and it is big that the product overall dimensions also can become thereupon.

The utility model content

The purpose of this utility model provides a kind of primary cut-out that can improve the Electric Field Distribution of moving contact.

The utility model adopts following technical scheme: a kind of primary cut-out, comprise movable contact headstock and stationary contact headstock, be respectively equipped with moving contact, fixed contact on movable contact headstock and the stationary contact headstock, be fixed with on the movable contact headstock one when moving contact is in the separating brake position with the shading ring of the corresponding suit of moving contact.

Described shading ring is to be connected by the port bulge loop, with the collocation cover of moving contact inserting to constitute.

The utility model be fixed with on the movable contact headstock one when moving contact is in the separating brake position with the shading ring of the corresponding suit of moving contact, make the Electric Field Distribution of fracture moving contact more even, not only improved the proof voltage requirement of fracture, and improved insulation level greatly High-Voltage Electrical Appliances; Especially this structure need not just can reach the proof voltage requirement by changing opening apart from, size and electrode distance of product, and is strong with the existing product component universality, can keep the size of existing product.

Further, shading ring is to be connected this primary cut-out fracture texture that constitutes by the port bulge loop with overlapping with the collocation of moving contact inserting, and is more reliable with cooperating of moving contact.

Description of drawings

Fig. 1 is the structural representation of existing primary cut-out fracture;

Fig. 2 is a structural representation of the present utility model.

Embodiment

As shown in Figure 2, primary cut-out of the present utility model, comprise movable contact headstock 3 and stationary contact headstock 4, be respectively equipped with moving contact 1, fixed contact 2 on movable contact headstock 3 and the stationary contact headstock 4, be fixed with on the movable contact headstock 3 one when moving contact 1 is in the separating brake position with the shading ring 7 of moving contact 1 corresponding suit, described shading ring 7 is to connect and compose by port bulge loop 5 with the collocation of moving contact inserting cover 6, and this primary cut-out fracture texture is more reliable with cooperating of moving contact; Make the Electric Field Distribution of fracture moving contact part 1 more even, not only improved the proof voltage requirement of fracture, and improved insulation level greatly High-Voltage Electrical Appliances; Especially this structure need not just can reach the proof voltage requirement by changing opening apart from, size and electrode distance of product, and is strong with the existing product component universality, can keep the size of existing product, greatly reduces and researches and develops and maintenance cost.

Claims (2)

1. primary cut-out, comprise movable contact headstock and stationary contact headstock, on movable contact headstock, stationary contact headstock, be respectively equipped with moving contact, fixed contact, it is characterized in that: be fixed with on the movable contact headstock one when moving contact is in the separating brake position with the shading ring of the corresponding suit of moving contact.

2. primary cut-out according to claim 1 is characterized in that: described shading ring is to be connected by the port bulge loop, with the collocation cover of moving contact inserting to constitute.

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