Fault arc protecting device and method

A technology of arc fault and protection device, which is applied in the direction of emergency protection circuit device, circuit device, emergency protection device with automatic disconnection, etc., which can solve the problems of long judgment cycle time and single judgment condition, so as to improve the response speed and shorten the judgment time. the effect of time

Active Publication Date: 2015-03-25
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are some fault arc protection circuits in the prior art, but these fault arc protection circuits have the disadvantages of single judgment conditions and long judgment cycle time

Method used

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  • Fault arc protecting device and method
  • Fault arc protecting device and method
  • Fault arc protecting device and method

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Embodiment Construction

[0054] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0055] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0056] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0057] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

The invention discloses a fault arc protecting device and method. The fault arc protecting device comprises a control unit, a pulse detection circuit and a zero-crossing detection circuit, wherein the pulse detection circuit is used for sampling current signals of a protecting circuit to obtain detection circuit pulse signals and sending the detection circuit pulse signals to the control unit; the zero-crossing detection circuit sends trigger electric signals to the control unit when detecting that the current value of the current signals is zero; the control unit is used for conducting periodic analysis on the detection circuit pulse signals on the basis of the trigger electric signals so that fault arcs can be detected. The fault arc protecting device can shorten judgment time, increase response speed and protect the fault arcs more reliably and effectively.

Description

technical field [0001] The invention relates to the technical field of electrical protection, in particular to a fault arc protection device and a method thereof. Background technique [0002] Arc-fault circuit interrupter (AFCI for short) is a new circuit protection technology whose main function is to prevent some fires caused by arc faults. These dangerous arcs can occur on household wiring, when plugs and sockets are connected, and on wiring harnesses inside appliances or on appliance power cords. The main causes of arc faults are worn wire insulation or poor electrical connections. There are some arc fault protection circuits in the prior art, but these arc fault protection circuits have the disadvantages of single judgment condition and long judgment cycle time. Contents of the invention [0003] A technical problem to be solved by the present invention is that the fault arc protection circuit in the prior art has a shortcoming of a long judgment period. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/50G01R19/00G01R19/175G01R23/10
Inventor 王新
Owner GREE ELECTRIC APPLIANCES INC
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