Circuit breaker

A technology of circuit breakers and circuits, applied in the direction of high-voltage air circuit breakers, circuits, and air switch parts, etc., can solve problems such as selection of limited applications

Inactive Publication Date: 2003-02-19
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the screw in the mechanism is also movable as ...

Method used

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Embodiment Construction

[0045] FIG. 1 schematically shows the principle of a circuit breaker comprising a circuit breaker chamber 1 , operating means 2 and an operating lever 3 . The circuit breaker chamber accommodates the static contacts 4 and the moving contacts 5 . Each contact is electrically connected to a respective conductor. Under normal conditions, the contacts 4, 5 touch each other and current flows through the circuit breaker from one conductor to the other. If, for some reason, for example, as a result of a fault causing a short-circuit current, it is necessary to break the current, the movable contact 5 is pulled away from its contact position with the stationary contact 4 at a very high speed. This first results in an arc between the contacts, which is extinguished as soon as the contacts have separated from each other. By bringing the movable contact 5 back into contact with the stationary contact 4, the circuit is closed again. The initiation of opening and closing current can be ...

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Abstract

The invention relates to an electric circuit breaker that includes at least one mobile contact. The contact is connected to operating means that includes an electric motor (6). Movement converting means (16, 17) are provided for converting rotary movement of the motor (6) to translatory movement for linear movment of the mobile contact. The object is to provide an improved movement conversion means. According to the invention, the movement conversion means includes a first body, such as a screw (17), and a second body, such as a nut (16). The threads of the screw (17) and the nut (16) co-act in engagement with each other. The invention also relates to an electric plant that is equipped with such a circuit breaker, to the use of the breaker for breaking electric current, and to a method of breaking electric current with the aid of the inventive circuit breaker.

Description

technical field [0001] According to a first aspect, the invention relates to a circuit breaker as defined in the recitation of claim 1 . In a second, third and fourth aspect respectively, the invention relates to an electrical device equipped with such a circuit breaker, the use of such a circuit breaker, and a method of breaking an electric current. [0002] Such circuit breakers are used in electric plants, for example in electrical switchgear, in order to enable the interruption of electrical current when necessary. In addition to being able to break and make normal load currents, the circuit breaker should first be able to break very quickly those short-circuit currents that are generated when a fault occurs in the system. The main components of a circuit breaker are the circuit breaker compartment and operating elements. A circuit is opened and closed by two electrical contacts placed within the circuit breaker compartment, one of which is normally stationary and the ot...

Claims

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Application Information

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IPC IPC(8): H01H31/02H01H3/26H01H3/40H01H31/32H01H33/36
CPCH01H3/40H01H2003/405H01H3/26
Inventor 佩-沃洛夫·瑟里森拉斯·赫曼森托马斯·洛尼宁斯特芬·瓦尔登玛森斯蒂格·诺斯洛姆
Owner ABB (SCHWEIZ) AG
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