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Intelligent leakage protection switch

A leakage protection switch, intelligent technology, applied in emergency protection circuit devices, automatic disconnection emergency protection devices, electrical components, etc., can solve problems such as inconvenience and inaccurate judgment

Inactive Publication Date: 2012-03-21
赵磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of circuit can play a protective role, it also has certain defects: whether it is a line leakage or a short-term interference, as long as the leakage switch detects that there is an abnormal current passing through, it will immediately cut off the circuit through the release. That is, it is impossible to accurately judge whether it is a leakage phenomenon, and it is impossible to avoid the line being cut off due to the interference of non-leakage phenomenon, which brings a lot of inconvenience to the use.

Method used

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Embodiment Construction

[0009] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0010] like figure 1 As shown, the intelligent leakage protection switch includes a transmission line 1, and a release device 2 is connected to the transmission line 1; a leakage inductance coil 3 is set on the transmission line 1, and a resistor R is connected in series at one end of the leakage inductance coil 3 1 and resistor R 2 , with resistor R 2 There is a capacitor C in parallel 1 ; at resistance R 1 and resistor R 2 There is an output terminal 4 between them, the output terminal 3 is electrically connected to the single-chip microcomputer 5, and an electronic switch circuit is connected between the single-chip microcomputer 5 and the release 2, and the electronic switch circuit includes a diode D 1 、D 2 、D 3 、D 4 , thyristor 6, capacitor C 2 , resistance R 3 , Diode D 3 、D 4 After series connection with capacitor ...

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Abstract

The invention relates to an intelligent leakage protection switch which comprises a transmission line provided with a tripping device; a leakage inductance coil connected with a singlechip is arranged on the transmission line; and the singlechip controls the work of the tripping device. The intelligent leakage protection switch can eliminate the cut off of the transmission line caused by the interference of non-leakage phenomenon, and can accurately decide whether leakage occurs.

Description

technical field [0001] The invention relates to a leakage protection switch. Background technique [0002] When leakage occurs in the circuit, measures should be taken to cut off the circuit in time, otherwise it is easy to cause the equipment in the circuit to malfunction, and even a safety accident may occur. In order to cut off the circuit in time, people usually use a leakage protection switch. For example, a leakage switch is disclosed in the patent document whose patent number is 200920115208.2 and the application date is 2009.3.9 and the authorized announcement date is 2009.12.9, including a current transformer, an operational amplifier circuit, an electronic switch circuit and a release device. The output terminal of the transformer is connected to one input terminal of the operational amplifier circuit, the other input terminal of the operational amplifier circuit is connected to the set power supply, the output terminal of the operational amplifier circuit is conn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/32
Inventor 赵磊
Owner 赵磊