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Low-voltage circuit breaker with rapid lock-jumping function

A low-voltage circuit breaker and circuit breaker technology, applied to switches with electric heating and electromagnetic release, protection switch operation/release mechanisms, etc., can solve the problems of difficulty in improving the breaking level and easy saturation of the breaking protection capacity of low-voltage circuit breakers, and achieve breaking The effect of improving capacity and reducing breaking time

Inactive Publication Date: 2006-03-15
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problem that the breaking protection capacity of the existing low-voltage circuit breaker is easily saturated, and the breaking level is difficult to improve

Method used

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  • Low-voltage circuit breaker with rapid lock-jumping function
  • Low-voltage circuit breaker with rapid lock-jumping function
  • Low-voltage circuit breaker with rapid lock-jumping function

Examples

Experimental program
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Embodiment Construction

[0026] refer to Figure 1-6 , the low-voltage circuit breaker has a housing composed of a base 4, a base 17 and a cover 18, and the circuit breaker includes three-pole contact devices 5 placed side by side. In the contact device 5, there are two arc extinguishing grid chambers 14, and two pairs of contact heads 12 and 13 installed in the arc extinguishing grid chambers 14 can be operated under the action of the electrodynamic repulsion generated when the passing current exceeds a certain value. separate, forming a limit to said current, an operating mechanism 1 for opening and closing said contacts, a thermal energy driving said operating mechanism 1 for overload and / or short-circuit faults, an electromagnetic tripping device 15 and a rotating shaft 8. The lower end of the rotating shaft 8 is set on the support 32 of the base 4 , and the upper end is pivotally mounted on the support 33 , and the support 33 is mechanically connected with the base 4 . The rotating shaft 8 recei...

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PUM

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Abstract

The invention discloses a low-voltage circuit breaker having quick-acting tripping function, wherein an open-end flange is arranged on at least one side surface of the contact device, a corresponding force bearing member is arranged on the bottom of the rotation shaft of the chassis, the force bearing member receives the overpressure wind current escaped from the open-end flange of the contact apparatus, which is then magnified at the actuation member position through the rotation shaft transmission, then striking the shackle quickly, producing a tripping operation. The invention can substantially improve the tripping capability for the breaker.

Description

technical field [0001] The invention relates to a one-pole or multi-pole low-voltage circuit breaker, in particular to a low-voltage circuit breaker with fast tripping function. Background technique [0002] Existing low-voltage circuit breakers include a set of one-pole or multi-pole contact devices to realize the operating mechanism of closing and opening; the thermal energy of the action when overloaded and / or short-circuited, the electromagnetic tripping device and the device for accommodating the first three items mentioned above. Base, base and cover. As we all know, when the circuit breaker is overloaded by a large current, the contact head in the contact device is affected by the electromotive force, and the two are repelled to achieve the current limiting effect, followed by heat energy and the electromagnetic part of the electromagnetic tripping device. The circuit breaker is disconnected to protect the circuit and equipment. Each of the multi-poles may be impact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/12H01H73/48
Inventor 李然段育明郑光枢汪泰宇
Owner ZHEJIANG CHINT ELECTRIC CO LTD
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