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Multi-breakpoint circuit breaker

A circuit breaker and multi-breakpoint technology, applied in circuit breaker parts, circuit breaker contacts, etc., can solve the problems of increased heat accumulation, affecting the long-delay action characteristics of long-delay releases, etc.

Active Publication Date: 2012-07-18
BEIJING PEOPLES ELECTRIC PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this application scheme can meet the requirements of high working voltage, the wiring at the terminal in engineering applications is often not implemented according to the length of 2m specified in 8.3.3.3.4 of GB 14048.2, which leads to increased heat accumulation here , after the heat is transferred to the inside of the circuit breaker through heat, it directly affects the long-delay action characteristics of the long-delay release using bimetallic strips

Method used

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Embodiment 2

[0029] Embodiment 2 of the present invention, see Figure 6-8 As shown, it includes a base 1, a moving contact 3, and an arc extinguishing chamber 4. A twin static contact 2 placed in the base has two sets of static contacts 21, one set of static contacts 21 corresponds to one moving contact 3, and the other set of static contacts 21 corresponds to a U-shaped moving contact 31, The current flowing through the two moving contacts 3 and 31 flows in opposite directions, figure 2 Arrows are used to indicate the current flow direction; in order to meet the breaking requirements, a set of static contacts 21 corresponds to an arc extinguishing chamber 4 .

[0030] Twin static contact 2 is made of welding static contact 21 on the combined conductive base 22, and combined conductive base 22 is made up of conductive base one 221, conductive base two 222, conductive base three 223, as Figure 8 As shown, the connection method is welding, and connection methods such as screw connection...

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Abstract

The invention provides a multi-breakpoint circuit breaker. A preset connection mode is adopted, at least a pair of fixed contacts are arranged in a base, at least two sets of fixed contacts corresponding to two sets of movable contacts opposite to the flow direction of current are arranged on the pair of the static contacts, and one set of fixed contacts correspond to one arc extinguishing chamber, a plurality of breakpoints are connected in series in the base of the circuit breaker, so that users do not need to wire outside a wiring terminal for connecting the breakpoints in series. Long time-delay characteristics are also set in the preset wiring mode, so that the motion characteristics of the multi-breakpoint circuit breaker cannot be affected when the multi-breakpoint circuit breaker is used by the users.

Description

technical field [0001] The invention relates to a molded case circuit breaker, which belongs to the field of low-voltage electrical appliances. Background technique [0002] With the development of new energy technology, higher requirements are put forward for low-voltage electrical components. Especially with the continuous development and expansion of photovoltaic power plants, the performance indicators of the protection components required by the power plants have higher requirements. In the photovoltaic power DC system, the rated working voltage of low-voltage electrical appliances is even as high as DC1500V. Using the method of breaking points in series can improve the breaking performance of the circuit breaker. In this regard, many manufacturers at home and abroad have also introduced various circuit breaker wiring application schemes. Wiring is performed at the external terminal of the circuit breaker, so that two or more poles of the circuit breaker are connected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/04H01H73/18
Inventor 南寅朱金保何高升
Owner BEIJING PEOPLES ELECTRIC PLANT
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