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Current open circuit arc extinguishing device and method based on nonlinear resistor

A non-linear resistance and current breaking technology, which is applied in the direction of circuit breaker components, etc., can solve problems such as weak arc extinguishing ability, burnt out contacts, and shortened life of circuit breakers, so as to improve breaking capacity and service life, and easily cut off effect

Inactive Publication Date: 2014-12-24
JIANGSU JIANGCHENG ELECTRIC
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  • Abstract
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Problems solved by technology

[0003] In view of the above problems, the present invention proposes a current breaking arc extinguishing device and method based on a non-linear resistance, which solves the problem that the existing circuit breaker arc extinguishing device generates a strong arc due to the weak arc extinguishing ability when breaking a large current, thereby The problem of reducing the life of the circuit breaker itself or even burning out the contacts

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  • Current open circuit arc extinguishing device and method based on nonlinear resistor

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the implementation of the present invention will be described clearly and completely in conjunction with the accompanying drawings:

[0017] Such as figure 1 A current interruption and arc extinguishing device based on nonlinear resistance is shown, including: shunt electronic component 1, thyristor switch 2, time relay circuit 4; said shunt electronic component 1 includes zinc oxide resistor 1-1 and polymer The thermistor 1-2, the zinc oxide resistor 1-1 and the polymer thermistor 1-2 are connected in parallel; the time relay circuit 4 includes a switch 4-2, a control circuit 4-1; The No. 1 switch 4-2 is connected in parallel with the thyristor switch 2, the thyristor control interface is connected to the negative interface of the control circuit, and the positive electrode interface of the control circuit is connected to the ...

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Abstract

The invention provides a current open circuit arc extinguishing device and method based on a nonlinear resistor. The problems that according to an existing arc extinguishing device of a circuit breaker, when high-current breaking happens, due to the low arc extinguishing capability, strong electric arcs are generated, and the service life of the circuit breaker is shortened, and even a contact is burnt out are solved. According to the direct-current circuit breaker arc extinguishing device designed based on the characteristics of the nonlinear resistor, the electric arc of the direct-current circuit breaker in the breaking process is reduced through shunting of the circuit and the current limiting capability of the nonlinear resistor. The aims of improving the breaking capacity of the circuit breaker and prolonging the service life of the circuit breaker are achieved.

Description

Technical field [0001] The method belongs to the field of DC circuit breaker arc extinguishing, and is a DC circuit breaker arc extinguishing device and method designed by using the characteristics of nonlinear resistance. technical background [0002] With the advancement of science and technology, DC transmission technology, which is an important means of solving high-voltage, large-capacity, long-distance power transmission and asynchronous interconnection, is becoming more and more widely used. Compared with AC transmission, DC transmission has better economic benefits and superior operating characteristics. However, the DC circuit breaker has become the "bottleneck" problem of the DC power system. The main problem with DC circuit breakers is that there is no current zero point that can directly extinguish the arc. Therefore, the most important problem of DC breaking is to take effective measures to make the breaking DC current must create a zero-crossing point, so that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18
Inventor 解良洪
Owner JIANGSU JIANGCHENG ELECTRIC
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