CN102386610A - Intelligent leakage protection switch - Google Patents
Intelligent leakage protection switch Download PDFInfo
- Publication number
- CN102386610A CN102386610A CN2011104169123A CN201110416912A CN102386610A CN 102386610 A CN102386610 A CN 102386610A CN 2011104169123 A CN2011104169123 A CN 2011104169123A CN 201110416912 A CN201110416912 A CN 201110416912A CN 102386610 A CN102386610 A CN 102386610A
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- resistance
- chip microcomputer
- transmission line
- circuit
- diode
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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
The present invention relates to earth leakage circuit-breaker.
Background technology
When leaky occurring in the circuit, should take measures to cut off circuit timely, otherwise the equipment in the circuit is broken down, even security incident can occur.In order to cut off circuit timely, now, people adopt earth leakage circuit-breaker usually.As being to be to be to disclose a kind of leakage switch in the patent documentation of 2009.12.9 2009.3.9 Granted publication day in the patent No. 200920115208.2 applyings date; Comprise current transformer, operational amplification circuit, electronic switching circuit and release; The output of said current transformer links to each other with an input of said operational amplification circuit; The power supply that another input termination of said operational amplification circuit is set; The output of said operational amplification circuit links to each other with the input of said electronic switching circuit, and the output of said electronic switching circuit links to each other with the control end of said release.Though sort circuit can play a protective role; But also there is certain defective: regardless of being line electrical leakage or receiving of short duration interference; As long as this leakage switch has detected abnormal electric current and has passed through, then can cut off circuit through release at once, promptly can't judge whether to be leaky accurately; Can't avoid causing circuit to be cut off, thereby bring many inconvenience to use because of the interference of non-leaky.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of intelligent earth leakage circuit-breaker, the interference that this intelligence earth leakage circuit-breaker can be eliminated because of non-leaky causes transmission line to be cut off, and can take a decision as to whether leaky accurately.
The technical scheme that solves the problems of the technologies described above is: a kind of intelligent earth leakage circuit-breaker comprises transmission line, is connected with release on the transmission line; Transmission line is provided with the leakage inductance coil, is connected with single-chip microcomputer on the leakage inductance coil, the work of Single-chip Controlling release.
As improvement, be in series with resistance R at an end of leakage inductance coil
1And resistance R
2, with resistance R
2Be parallel with capacitor C
1In resistance R
1And resistance R
2Between have an output, output is electrically connected with single-chip microcomputer.
As improvement, between single-chip microcomputer and release, be connected with electronic switching circuit, electronic switching circuit comprises diode D
1, D
2, D
3, D
4, thyristor, capacitor C
2, resistance R
3, diode D
3, D
4Series connection back and capacitor C
2, resistance R
3The parallel connection back forms parallel circuits, resistance R
3Output be connected with single-chip microcomputer, the gate pole of thyristor is connected with single-chip microcomputer; Diode D
1Connect the back in diode D with parallel circuits
2Parallel connection.
The invention has the beneficial effects as follows: owing to be provided with single-chip microcomputer; Single-chip microcomputer receives from the detected leakage inductance unsymmetrical current of leakage inductance coil; Deduct the inhomogeneous basic error voltage that causes of original leakage inductance magnetic through single-chip microcomputer, computing fast just is recorded as for the first time if surpass the tripping voltage that sets this moment; Detect second and for the third time then according to this, just trip if all surpass setting voltage for three times.The tripping operation action is sent a pulse by single-chip microcomputer and is moved to release.Thereby reach the purpose of protection.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further elaborated.
As shown in Figure 1, intelligent earth leakage circuit-breaker comprises transmission line 1, is connected with release 2 on the transmission line 1; Be with leakage inductance coil 3 on the transmission line 1, an end of leakage inductance coil 3 is in series with resistance R
1And resistance R
2, with resistance R
2Be parallel with capacitor C
1In resistance R
1And resistance R
2Between have an output 4, output 3 is electrically connected with single-chip microcomputer 5, is connected with electronic switching circuit between single-chip microcomputer 5 and the release 2, electronic switching circuit comprises diode D
1, D
2, D
3, D
4, thyristor 6, capacitor C
2, resistance R
3, diode D
3, D
4Series connection back and capacitor C
2, resistance R
3The parallel connection back forms parallel circuits, resistance R
3Output be connected with single-chip microcomputer, the gate pole of thyristor is connected with single-chip microcomputer; Diode D
1Connect the back in diode D with parallel circuits
2Parallel connection.
This leakage switch, owing to be provided with single-chip microcomputer 5, single-chip microcomputer 5 receives from the detected leakage inductance unsymmetrical current of leakage inductance coil; Through the inhomogeneous basic error voltage that causes of the original leakage inductance magnetic of single-chip microcomputer 5 deductions, computing fast just is recorded as for the first time if surpass the tripping voltage that sets this moment; Detect second and for the third time then according to this, just trip if all surpass setting voltage for three times, like this; Just can not cause the phenomenon of tripping operation because of of short duration interference, improve and judge whether the accuracy of leaking electricity.The tripping operation action is sent a pulse to making the action of thyristor conducting control release by single-chip microcomputer.Thereby reach the purpose of protection.
Claims (3)
1. an intelligent earth leakage circuit-breaker comprises transmission line, is connected with release on the transmission line; It is characterized in that: transmission line is provided with the leakage inductance coil, is connected with single-chip microcomputer on the leakage inductance coil, the work of Single-chip Controlling release.
2. intelligent earth leakage circuit-breaker according to claim 1 is characterized in that: the end at the leakage inductance coil is in series with resistance R
1And resistance R
2, with resistance R
2Be parallel with capacitor C
1In resistance R
1And resistance R
2Between have an output, output is electrically connected with single-chip microcomputer.
3. intelligent earth leakage circuit-breaker according to claim 1 and 2 is characterized in that: between single-chip microcomputer and release, be connected with electronic switching circuit, electronic switching circuit comprises diode D
1, D
2, D
3, D
4, thyristor, capacitor C
2, resistance R
3, diode D
3, D
4Series connection back and capacitor C
2, resistance R
3The parallel connection back forms parallel circuits, resistance R
3Output be connected with single-chip microcomputer, the gate pole of thyristor is connected with single-chip microcomputer; Diode D
1Connect the back in diode D with parallel circuits
2Parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104169123A CN102386610A (en) | 2011-12-13 | 2011-12-13 | Intelligent leakage protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104169123A CN102386610A (en) | 2011-12-13 | 2011-12-13 | Intelligent leakage protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102386610A true CN102386610A (en) | 2012-03-21 |
Family
ID=45825731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104169123A Pending CN102386610A (en) | 2011-12-13 | 2011-12-13 | Intelligent leakage protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102386610A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512109Y (en) * | 2002-01-15 | 2002-09-18 | 董世荣 | Power circuit breaker with multifunctional protections |
| CN2560139Y (en) * | 2002-06-24 | 2003-07-09 | 刘生仁 | Loading bus intelligent breaker |
| CN1588738A (en) * | 2004-09-11 | 2005-03-02 | 郑祥衡 | Intelligent phase-detecting amplitude-detecting leak comprehensive protector with self diagnostic function |
| CN1604418A (en) * | 2004-11-04 | 2005-04-06 | 河北工业大学 | Automatic tracking protector for earth leakage and operation method thereof |
| CN1764031A (en) * | 2004-10-21 | 2006-04-26 | 钟汝祥 | Intelligent leakage circuit breaker |
| CN202363876U (en) * | 2011-12-13 | 2012-08-01 | 赵磊 | Intelligent leakage protection switch |
-
2011
- 2011-12-13 CN CN2011104169123A patent/CN102386610A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512109Y (en) * | 2002-01-15 | 2002-09-18 | 董世荣 | Power circuit breaker with multifunctional protections |
| CN2560139Y (en) * | 2002-06-24 | 2003-07-09 | 刘生仁 | Loading bus intelligent breaker |
| CN1588738A (en) * | 2004-09-11 | 2005-03-02 | 郑祥衡 | Intelligent phase-detecting amplitude-detecting leak comprehensive protector with self diagnostic function |
| CN1764031A (en) * | 2004-10-21 | 2006-04-26 | 钟汝祥 | Intelligent leakage circuit breaker |
| CN1604418A (en) * | 2004-11-04 | 2005-04-06 | 河北工业大学 | Automatic tracking protector for earth leakage and operation method thereof |
| CN202363876U (en) * | 2011-12-13 | 2012-08-01 | 赵磊 | Intelligent leakage protection switch |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120321 |