Upper inlet stationary contact device of molded case circuit breaker
A moulded-case circuit breaker and top-in-line technology, which is applied to circuit breaker contacts, circuit breaker parts, etc., can solve the problems of insufficient arc entry, slow contact repulsion speed, and complex structure, and achieves simple structure and improved performance. The effect of reducing the utilization rate and production cost
Active Publication Date: 2014-07-02
EATON HUINENG LOW-VOLTAGE ELECTRICAL (JIANGSU) CO LTD
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
The defect of this device is; (1), adopted two electric current loops, the structure is complex and costly material
(2) Since the current loop is located outside the arc extinguishing chamber, the contact opening speed is slow, and the arc cannot fully enter the arc extinguishing chamber when the contacts are opening.
Method used
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Embodiment Construction
[0020] Such as Figure 2-3 As shown in , the present invention consists of the left housing 2 of the arc extinguishing chamber, the arc extinguishing grid 7, the right housing 3 of the arc extinguishing chamber, the insulator 4, the moving contact 5 and the ring-shaped upper incoming static contact 1 with an opening at the bottom composition. The left shell 2 of the arc extinguishing chamber and the right shell 3 of the arc extinguishing chamber are assembled into an arc extinguishing chamber after being docked left and right, and the arc extinguishing grid 7 is set in the cavity of the arc extinguishing chamber, and the first through slot is opened on the rear wall of the arc extinguishing chamber 6. The front end of the moving contact 5 extends into the cavity of the arc extinguishing chamber through the first through slot 6, and the insulating member 4 is fixedly installed at the first through slot 6.
[0021] Such as figure 2 and Figure 4 As shown, the upper incoming ...
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The invention discloses an upper inlet stationary contact device a molded case circuit breaker. An upper inlet stationary contact has an annular structure with a bottom opening. The front inlet end of the upper inlet stationary contact is positioned outside an arc extinguishing chamber, and the rear end of the upper inlet stationary contact is fixedly connected with a stationary contact, and is positioned in an inner cavity of the arc extinguishing chamber. The other part of the upper inlet stationary contact is positioned in the inner cavity of the arc extinguishing chamber, and is embedded into the inner wall of the arc extinguishing chamber. The front end of a movable contact penetrates through straight slots in the upper inlet stationary contact, and then is enveloped in the annular structure. When a switch is powered on and the movable contact is not opened, current flowing through the bent surface of the stationary contact applies attraction and repulsion to the movable contact; when the movable contact is opened for a certain distance, current flowing through a fourth bent surface weakens the repulsion to the movable contact, and current flowing through the inclined section of a second bent surface applies upward attraction to the movable contact to ensure the rapid opening of the movable contact; and when the movable contact is opened by a certain angle, and electric arc is transferred to an arc striking pin, a conducting loop through which the current flows is approximate to an integral current coil, so that the electric arc can be faster extinguished.
Description
technical field [0001] The invention relates to a molded case circuit breaker in the field of low-voltage electrical technology, in particular to a static contact device of the molded case circuit breaker, and belongs to the field of low-voltage electrical technology. Background technique [0002] The contact system of the existing low-voltage molded case circuit breaker includes a static contact and a moving contact that can be closed and separated with the static contact. This contact device is generally used in low-voltage switching operations, such as circuit breakers, motor protection switch and so on. [0003] The patent US 6518530B2 applied by Moeller Company describes a static contact device with an upper incoming line. The structure of this device can be found in figure 1 As shown in the disassembled diagram, the arc extinguishing grid 3 is arranged inside the box 2 in a reliable locking manner, and the insulator 4 is spliced with the box 2 to form a semi-closed ...
Claims
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IPC IPC(8): H01H73/04
Inventor 陈咸任飞李冰燕
Owner EATON HUINENG LOW-VOLTAGE ELECTRICAL (JIANGSU) CO LTD