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Electric circuit breaker, as well as plant, use and method where such is used

A circuit breaker and circuit technology, which is applied in the direction of high-voltage air circuit breakers, circuits, electric switches, etc., can solve the problems of expensive, large and bulky electromagnetic operating devices, and achieve the effects of cost reduction, lower voltage requirements, and lower costs

Inactive Publication Date: 2003-05-07
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, known electromagnetically operated devices are relatively large, bulky and expensive

Method used

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  • Electric circuit breaker, as well as plant, use and method where such is used
  • Electric circuit breaker, as well as plant, use and method where such is used
  • Electric circuit breaker, as well as plant, use and method where such is used

Examples

Experimental program
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Effect test

Embodiment Construction

[0036] Figure 1 schematically shows the principle of a circuit breaker. It includes circuit breaker chamber 1 , operating device 2 and operating lever 3 . The static contact 4 and the movable contact 5 are arranged in the circuit breaker chamber. Each contact is electrically connected to a respective line. Under normal conditions, the contacts 4, 5 are in contact with each other, and the current is conducted from one line to the other through the circuit breaker. If for some reason the current has to be disconnected, for example because of a short-circuit current caused by a fault, the moving contact 5 is quickly withdrawn from the stationary contact 4 . An arc first occurs between the contacts and is extinguished by the insulating gas flow as soon as the contacts have separated. When the current is then closed, the movable contact 5 is again forced into contact with the stationary contact 4 . Opening and closing can be manual or automatic. The circuit breaker is turned O...

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PUM

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Abstract

The invention relates to an electric circuit breaker. The circuit breaker comprises at least one mobile contact with operating means (2) for operating the same. An electric motor (6) is arranged for driving the operating means (2). The motor (6) is powered from a current source (50) via a current converter (40). According to the invention, the motor (6) and / or current converter (40) are greatly under-dimensioned in relation to the output the current converter is designed to deliver. This is possible because the operating duration is so brief. Under-dimensioning results in extensive cost-savings. The invention also relates to an electric plant equipped with such a circuit breaker. The invention further relates to the use of such a circuit breaker and a method for breaking electric current in the corresponding fashion.

Description

technical field [0001] According to a first aspect, the invention relates to a circuit breaker of the type stated in claim 1 . The circuit breaker is accordingly driven by the motor. The inverter is connected between the motor and a power source that supplies power to the motor. The second, third and fourth aspects of the invention relate to an electrical device provided with such a circuit breaker, the use of such a circuit breaker and a method of breaking an electric current. [0002] This type of circuit breaker is used in electrical equipment such as switchyards to disconnect power when necessary. A circuit breaker must be able to open and close normal electrical loads, but in particular it must be able to quickly break short-circuit currents generated when a fault occurs in the system. The main components of a circuit breaker are the circuit breaker compartment and the systems used to operate the circuit breaker. Breaking and closing current is accomplished through co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/36H02P6/00
CPCH02P6/00H01H33/36H02P6/32
Inventor 弗雷迪·马格纳森菲利普·克加尔斯蒂芬·瓦德马森
Owner ABB (SCHWEIZ) AG
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