Low voltage circuit breaker
A low-voltage circuit breaker and static contact technology, applied in circuits, electrical components, electrical switches, etc., can solve the problems of reduced market demand for circuit breakers, reduced market competitiveness, and increased cost of circuit breakers, so as to improve working voltage and breaking Power, low power consumption, small size effect
Active Publication Date: 2020-08-28
SOOAR TIANJIN ELECTRICAL EQUIP CO LTD
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Problems solved by technology
At present, in order to achieve high voltage and high breaking capacity of low-voltage circuit breakers, methods such as enlarging the arc extinguishing chamber, prolonging the length of the contacts to increase the distance between the contacts, and connecting multiple breakpoints in series are usually used. However, although these methods can Improve the breaking capacity of the circuit breaker, but the volume of the circuit breaker will increase significantly, resulting in a decrease in the market demand for the circuit breaker, and at the same time the cost of the circuit breaker will increase, reducing market competitiveness
Method used
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] Unless otherwise defined separately, directions such as up, down, front, and back mentioned herein are all in accordance with the present invention. figure 1 The up, down, front, back, etc. directions in the text shall prevail, and shall be explained together here.
[0039] In a molded case circuit breaker, there is usually at least one fixed contact part (such as a static contact) and at least one movable contact part (such as a moving contact) for eac...
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The invention provides a low-voltage circuit breaker, comprising: a fixed contact fixed on a base and extended through a U-shaped magnetic gathering portion, wherein an end of the fixed contact is provided with a first arc guide portion that is extended obliquely down, and the first arc guide portion is positioned above the U-shaped magnetic gathering portion; a moving contact that is rotationallypositioned above the fixed contact, the moving contact and the fixed contact are in contact or separated, a free end of the moving contact is provided with a second arc guide portion that is extendedobliquely up; an arc extinguishing chamber fixed on the base, wherein a top arc guide grid and a bottom arc guide grid are arranged within the arc extinguishing chamber, the bottom arc guide grid ispositioned above the U-shaped magnetic gathering portion and is opposite to the first arc guide portion, and the top arc guide grid may face the second arc guide portion. The low-voltage circuit breaker has the advantages that arc drawing distance and speed can be increased without increasing the length of the moving contact, working voltage and breaking capacity of the ow-voltage circuit breakercan be improved, and the ow-voltage circuit breaker has small size and low power consumption.
Description
technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a high-voltage, high-breaking molded case low-voltage circuit breaker. Background technique [0002] In the existing technology, circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Generally, those with a voltage above 3kV are high-voltage circuit breakers, and others are low-voltage circuit breakers. Among low-voltage circuit breakers, the voltage is 800V and above. The above is a high-voltage low-voltage circuit breaker. At present, in order to achieve high voltage and high breaking capacity of low-voltage circuit breakers, methods such as enlarging the arc extinguishing chamber, lengthening the length of the contacts to increase the distance between the contacts, and connecting multiple breakpoints in series are usually used. However, although these methods can Improve the ...
Claims
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IPC IPC(8): H01H9/34H01H9/44
Inventor 南寅南添
Owner SOOAR TIANJIN ELECTRICAL EQUIP CO LTD