Circuit breaker for low-voltage currents

A low-voltage current and circuit breaker technology, which is applied in the field of automatic low-voltage circuit breakers, can solve the problems of reduced electrical performance of circuit breakers, increased production and assembly costs, and contact force that cannot be kept constant.

Inactive Publication Date: 2003-12-31
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even though there may be sufficient contact between the electrical parts, the contact force cannot be maintained throughout the life of the circuit breaker, which will directly affect the opening time and contact resistance, which will eventually lead to a reduction in the elec

Method used

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  • Circuit breaker for low-voltage currents
  • Circuit breaker for low-voltage currents
  • Circuit breaker for low-voltage currents

Examples

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Embodiment Construction

[0021] figure 1 Partially shown is a known low voltage current automatic circuit breaker comprising a housing 9 accommodating movable and fixed contact means. In the illustrated embodiment, the fixed contact device includes at least one fixed contact 1 with a conductive body 1a on which a contact plate 1b is mounted; correspondingly, the movable contact device includes a fixed contact 1 with a The movable contact 2 is a contoured conductive body 2a on which is mounted a contact plate 2b suitable for electrical coupling with a corresponding contact plate 1b. Movable contact 2 is driven by a suitable kinematic chain in the figure 1 Indicated by the reference numeral 15, according to an embodiment widely known in the art and therefore not described in detail, the kinematic chain comprises a plurality of movable contacts 2 coupled to the contacts in the disconnected position of the contacts and plates 1b and A lever that moves between closed positions where the plates 2b are in ...

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PUM

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Abstract

A circuit breaker for low-voltage currents, comprising an enclosure that contains moving contact means and fixed contact means, the moving contact means comprising at least one moving contact, the fixed contact means comprising at least one fixed contact, a kinematic chain that comprises a plurality of levers that move the moving contact between an open position, in which the contacts are separated, and a closed position, in which they are coupled, and a mechanism that ensures a substantially constant force between the contacts in the closed position, its particularity consisting of the fact that the mechanism comprises a single body that has a first rigid element, which is associated with at least one of the fixed and moving contacts, and a second rigid element, which is arranged adjacent to the first rigid element and is connected thereto by virtue of a flexible hinge constituted by a first elastic and resilient element.

Description

technical field [0001] The invention relates to a low-voltage current circuit breaker with improved characteristics, in particular, the invention relates to an automatic low-voltage circuit breaker which enables the movement of the circuit breaker according to the invention by means of a structurally simple and functionally effective solution The contact force between the contact and the fixed contact remains constant over time. Background technique [0002] As we all know, circuit breakers are protective devices that trip and cut off the current when an electrical fault occurs in the circuit into which the circuit breaker is connected; for this purpose, they have electrical contacts consisting of two conductive metal parts, one is The one that is fixed is called the fixed contact or the static contact, and the other that is movable is called the movable contact. The movable contacts are driven by the kinematic chain to couple or separate from the corresponding fixed contac...

Claims

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Application Information

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IPC IPC(8): H01H1/24
CPCH01H1/24H01H2001/247H01G9/15Y10T29/43Y10T29/49128Y10T29/49165
Inventor B·G·贝尔托洛托D·马拉卡尔扎
Owner ABB (SCHWEIZ) AG
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