Contact mechanism and switching device

A contact and moving contact technology, used in circuit breaker contacts, circuit breaker components, etc., can solve the problems of insufficient single-pole single-chamber arc extinguishing ability and failure to meet breaking requirements, and achieve high-voltage breaking. ability, improving breaking capacity, and improving the effect of high voltage breaking and arc extinguishing ability

Pending Publication Date: 2022-01-25
CHINT LOW VOLTAGE ELECTRICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these current arc extinguishing methods can only solve the arc generated by low voltage. For the arc generated by high voltage, the arc extinguishing ability of single pole and single chamber is slightly insufficient.
[0004] In addition, the traditional unipolar single-break contact mechanism can only meet the breaking requirements under a certain working voltage. When the working voltage is high, the traditional unipolar single-break contact mechanism cannot meet the breaking requirements.

Method used

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  • Contact mechanism and switching device
  • Contact mechanism and switching device
  • Contact mechanism and switching device

Examples

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Embodiment Construction

[0036] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of a contact system and arc extinguishing system of the present invention. A contact system and an arc extinguishing system of the present invention are not limited to the description of the following embodiments.

[0037] Such as Figure 1-3 As shown, an embodiment of a circuit breaker includes a handle 11 , an operating mechanism 12 , a contact system, an arc extinguishing system, a tripping system 15 , a first terminal 16 , and a second terminal 17 . The contact system includes at least one pole contact mechanism, each pole contact mechanism includes a set of moving contacts 2 and static contacts used in conjunction, the handle 11 is connected to the operating mechanism 12, and the moving contacts 2 are connected to the operating mechanism through the contact support 13 The mechanism 12 is connected, the moving contact 2 is set opposite...

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PUM

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Abstract

The invention relates to a contact mechanism and a switching device. The contact mechanism comprises a Y-shaped moving contact and a static contact composed of a first static contact and a second static contact. The moving contact comprises two moving contact contact arms and a moving contact connecting arm, and the first static contact is of a U-shaped structure capable of reversing current and comprises a first static contact plate used for being matched with the moving contact and a first static connecting plate connected with the first static contact plate; the two moving contact contact arms are respectively matched with the first static contact plate of the first static contact and the second static contact, so that the direction of the current flowing through the first static contact plate is opposite to the direction of the current flowing through one moving contact contact arm matched with the first static contact plate when the moving contact is closed; and the direction of the current flowing through the second static contact is opposite to the direction of the current flowing through the contact arm of the other moving contact matched with the second static contact, the double-breakpoint structure improves the breaking capacity, the breaking speed is increased by means of the mutual exclusion force between the moving contact and the static contact, and the switching device comprises the contact mechanism.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a switch electrical appliance. Background technique [0002] A DC circuit breaker is a switching device that can carry and break current under normal circuit conditions, and can also carry and break current under abnormal circuit conditions within a specified time. The function of breaking the overload or short-circuit current of the circuit breaker is mainly realized in the arc extinguishing chamber of the circuit breaker. When a fault current occurs in the circuit and the current value exceeds the set protection range of the circuit breaker, the tripping mechanism operates to quickly disconnect the moving and static contacts of the circuit breaker. At this time, the voltage formed between the moving and static contacts will cause the air medium to discharge, thereby generating a high-temperature arc. During the burning process of the arc, the temperature of th...

Claims

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Application Information

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IPC IPC(8): H01H73/04H01H73/18
CPCH01H73/04H01H73/18
Inventor 徐永富吴晓龙韦尚靖吴超鹏
Owner CHINT LOW VOLTAGE ELECTRICAL TECH CO LTD
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