CN2765360Y - Heavy-current intelligent composite protector for electric leakage with phase discrimination and amplitude discrimination - Google Patents
Heavy-current intelligent composite protector for electric leakage with phase discrimination and amplitude discrimination Download PDFInfo
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- CN2765360Y CN2765360Y CN 200520003641 CN200520003641U CN2765360Y CN 2765360 Y CN2765360 Y CN 2765360Y CN 200520003641 CN200520003641 CN 200520003641 CN 200520003641 U CN200520003641 U CN 200520003641U CN 2765360 Y CN2765360 Y CN 2765360Y
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Abstract
The utility model relates to an intelligent, phase discrimination and amplitude discrimination creepage comprehensive protector with heavy currents, which comprises an air circuit breaker, a switching on-off operating mechanism, a zero sequence mutual inductor LH, a singlechip U2, a creepage simulation generation circuit, a voltage detection circuit, a power source unit circuit, a creepage current display circuit and an electric on-off brake control circuit. The protector is also provided with a multistage creepage signal amplifying circuit which at least includes two stages. The utility model not only has the comprehensive functions of creepage phase discrimination and amplitude discrimination and earth fault, overcurrent, short circuit, undervoltage, overvoltage protection and display, etc., but also can realize protection to a large current creepage range.
Description
One, affiliated technical field
The utility model relates to a kind of leakage comprehensive protector, refers in particular to a kind of intelligent phase-detecting amplitude-detecting leak comprehensive protector.
Two, background technology
The applicant had once designed a kind of " intelligent phase-detecting amplitude-detecting leak comprehensive protector " (ZL02280316.5; open day: 2003.10.22); it comprises air circuit and breaking-closing operating mechanism; it is characterized in that also comprising earth leakage protective and under-voltage protection Detection ﹠ Controling circuit; one zero sequence current mutual inductor has two secondary; a secondary is connected with single-chip microcomputer with the electric leakage simulation generation circuit that button SW1～SW4 and resistance R 9～R13 are constituted; another secondary is connected with the electric leakage signal amplifying circuit; the electric leakage signal amplifying circuit is connected with single-chip microcomputer; voltage detecting circuit is connected with single-chip microcomputer; power unit circuit is connected with single-chip microcomputer; single-chip microcomputer connects electronic divide-shut brake control circuit and leakage current display circuit, has constituted described earth leakage protective and under-voltage protection Detection ﹠ Controling circuit.It not only has electric leakage phase demodulation amplitude discrimination function, and has comprehensive functions such as earth fault, overcurrent, short circuit, under-voltage, overvoltage protection and demonstration, but it is not suitable for the protection of leakage current greater than 600mA.
Three, utility model content
The purpose of this utility model is to provide a kind of intelligent phase-detecting amplitude-detecting leak comprehensive protector with self-diagnostic function; it not only has comprehensive functions such as electric leakage phase demodulation amplitude discrimination function and earth fault, overcurrent, short circuit, under-voltage, overvoltage protection and demonstration, and can realize the protection of big leakage current scope.
For achieving the above object; the solution that the utility model is taked is: a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current; it comprises that circuit, voltage detecting circuit, power unit circuit, leakage current display circuit, electronic divide-shut brake control circuit take place for air circuit, breaking-closing operating mechanism, zero-sequence transformer LH, single-chip microcomputer U2, electric leakage simulation; it also is provided with multistage electric leakage signal amplifying circuit, and multistage electric leakage signal amplifying circuit has two-stage at least.
Device U3A negative terminal connecting resistance R19 is sent out in computing big and resistance R 20, positive terminating resistor R17 and resistance R 18, the output connecting resistance R20 other end and resistance R 21, resistance R 19 another termination capacitor C 7, capacitor C 7 another termination capacitor C 6 and resistance R 16, resistance R 16 another termination capacitor C 5 and resistance R 15 constitute first order electric leakage signal amplifying circuit; Device U3B negative terminal connecting resistance R29 is sent out in computing big and resistance R 30, positive terminating resistor R17 and resistance R 18, the output connecting resistance R30 other end and resistance R 31, constitutes second level electric leakage signal amplifying circuit.
This leakage comprehensive protector adopts single-chip microcomputer U2, has simplified peripheral circuit greatly.Electric leakage signal becomes the signal that meets single-chip microcomputer U2 input requirement after amplifying.Single-chip microcomputer U2 detects electric leakage signal, calculates the amplitude I and the phase theta of electric leakage signal, and calculates the leakage current of A, B, C three-phase, can also calculate the phase place of electric leakage mutation current and mutation current.Single-chip microcomputer U2 is by realizing the phase-detecting amplitude-detecting leak protection according to detected leakage current amplitude and electric leakage mutation current.
This leakage comprehensive protector has been owing to adopted single-chip microcomputer U2, the leakage current of leakage current and A, B, C three-phase can be outputed to the leakage current display circuit, is convenient to the user and carries out accident analysis.Simultaneously, after the electric leakage action, can also demonstrate gradual electric leakage action or sudden change electric leakage action, can also demonstrate when sudden change electric leakage action that the sudden change electric leakage occurs in the A phase, or B mutually or the C phase.
This leakage comprehensive protector adopts the circuit under the single-chip microcomputer U2 control; and and air circuit be used in combination; the protection system that its function not only can replace former phase-detecting amplitude-detecting leak relay, contactor and circuit breaker to form fully; and increased on function that leakage current (three-phase electric leakage vector and, A phase, B phase, C phase leakage current) shows, electric leakage manner of execution (gradual electric leakage action, sudden change electric leakage action) shows, intelligent functions such as the specified gradual leakage current of combination in any and specified sudden change leakage current.Adopt technical grade single-chip microcomputer U2 chip, not only guaranteed the properties of product advanced person, also guaranteed the reliability of work.
This leakage comprehensive protector is by being provided with multistage electric leakage signal amplifying circuit; zero-sequence transformer LH sends detected electric leakage signal into first order electric leakage signal amplifying circuit; realization is to the amplification of electric leakage signal; electric leakage signal after the amplification is imported single-chip microcomputer U2 on the one hand; by the processing of single-chip microcomputer U2 realization to electric leakage signal; input to second level electric leakage signal amplifying circuit on the other hand; electric leakage signal is amplified again; electric leakage signal after the amplification is imported single-chip microcomputer U2 on the one hand; by the processing of single-chip microcomputer U2 realization to electric leakage signal; the third level is set; the fourth stage ... the electric leakage signal amplifying circuit, leakage signal is amplified amplification again.Therefore, this intelligent phase-detecting amplitude-detecting leak comprehensive protector not only has comprehensive functions such as electric leakage phase demodulation amplitude discrimination function and earth fault, overcurrent, short circuit, under-voltage, overvoltage protection and demonstration, and can realize the protection of big leakage current scope.When electric leakage signal hour, single-chip microcomputer U2 protects according to the value of second level electric leakage signal amplifying circuit; When electric leakage signal was big, single-chip microcomputer U2 protected according to the value of first order electric leakage signal amplifying circuit.Single-chip microcomputer U2 carries out input according to first order electric leakage signal amplifying circuit and second level electric leakage signal amplifying circuit simultaneously, determine to use the value of first order electric leakage signal amplifying circuit also to use the value of second level electric leakage signal amplifying circuit again according to the value after detecting, so do not have change-over time.By adopting multistage electric leakage signal amplifying circuit; can be increased to the third level or fourth stage electric leakage signal amplifying circuit; reach the purpose of big leakage current protection scope; and realized current detection accuracy in whole leakage current protection scope having improved earth leakage protective reliability and validity greatly.
Four, description of drawings
Fig. 1 is the circuit diagram of present embodiment.
Fig. 2 is the electrical principle block diagram of present embodiment.
Five, embodiment
Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.
Referring to Fig. 1 and Fig. 2; a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current; it comprises that circuit, voltage detecting circuit, power unit circuit, leakage current display circuit, electronic divide-shut brake control circuit take place for air circuit, breaking-closing operating mechanism, zero-sequence transformer LH, single-chip microcomputer U2, electric leakage simulation; it also is provided with multistage electric leakage signal amplifying circuit, and multistage electric leakage signal amplifying circuit has two-stage at least.
Referring to Fig. 1, device U3A negative terminal connecting resistance R19 is sent out in computing big and resistance R 20, positive terminating resistor R17 and resistance R 18, the output connecting resistance R20 other end and resistance R 21, resistance R 19 another termination capacitor C 7, capacitor C 7 another termination capacitor C 6 and resistance R 16, resistance R 16 another termination capacitor C 5 and resistance R 15 constitute first order electric leakage signal amplifying circuit; Operational amplifier U3B negative terminal connecting resistance R29 and resistance R 30, positive terminating resistor R17 and resistance R 18, the output connecting resistance R30 other end and resistance R 31 constitute second level electric leakage signal amplifying circuit.
Single-chip microcomputer U2 is the 16C72 chip, and operational amplifier U3 is the MCP602 chip, and the multiplication factor of second level electric leakage signal amplifying circuit is 2.
Referring to Fig. 1, the secondary of zero-sequence transformer LH is sent detected electric leakage signal into first order electric leakage signal amplifying circuit, realization is to the amplification of electric leakage signal, electric leakage signal after the amplification is imported single-chip microcomputer U2 on the one hand, by the processing of single-chip microcomputer U2 realization to electric leakage signal, input to second level electric leakage signal amplifying circuit on the other hand, electric leakage signal is amplified again, electric leakage signal after the amplification is imported single-chip microcomputer U2 on the one hand, by the processing of single-chip microcomputer U2 realization to electric leakage signal.When electric leakage signal hour, single-chip microcomputer U2 protects according to the value of second level electric leakage signal amplifying circuit; When electric leakage signal was big, single-chip microcomputer U2 protected according to the value of first order electric leakage signal amplifying circuit.The multiplication factor of second level electric leakage signal amplifying circuit is 2, and when leakage current during less than 600mA, single-chip microcomputer U2 protects according to the value of second level electric leakage signal amplifying circuit; When leakage current during greater than 600mA, single-chip microcomputer U2 protects according to the value of first order electric leakage signal amplifying circuit.Single-chip microcomputer U2 carries out input according to first order electric leakage signal amplifying circuit and second level electric leakage signal amplifying circuit simultaneously, determine to use the value of first order electric leakage signal amplifying circuit also to use the value of second level electric leakage signal amplifying circuit again according to the value after detecting, so do not have change-over time.By adopting two-stage electric leakage signal amplifying circuit; reach the purpose of big leakage current protection scope; can realize that the leakage current of 1000mA protects, and realize current detection accuracy, improve earth leakage protective reliability and validity greatly in whole leakage current protection scope.
In the present embodiment; air circuit is made up of DZ25 circuit breaker or other air circuits; have defencive functions such as overload, short circuit, phase shortage, overvoltage, electric leakage, time-delay, its major part is made up of Shell of circuit breaker, contact arc-extinguishing system, overload short circuit protection system.Breaking-closing operating mechanism partly is made up of manual brake separating operating mechanism, electronic breaking-closing operating mechanism, separating brake indicating mechanism.Electronic breaking-closing operating mechanism mainly is made up of permanent magnet DC motor M1, toggle.
Referring to Fig. 1, in the power unit circuit that elements such as transformer B1, diode D2 and integrated voltage-stabiliser tube T1 constitute, diode D1, D2 rectification go out voltage and directly give relay J 1 and permanent magnet DC motor M1 power supply.The anode of transformer B1 output terminating diode D1 and diode D2,1 pin of integrated voltage-stabiliser tube T1 connects negative electrode, capacitor C 1, capacitor C 2 anodes of diode D1 and diode D2,3 pin of integrated voltage-stabiliser tube T1 connect capacitor C 3 anodes and capacitor C 4, constitute described power unit circuit.
Referring to Fig. 1, relay J 1 coil one termination permanent magnet DC motor M1, another termination triode T2 collector electrode, triode T2 base stage connecting resistance R14 constitutes described electronic divide-shut brake control circuit.Single-chip microcomputer U2 realizes the control to relay J 1 and permanent magnet DC motor M1 by to the control of triode T2, thereby finishes the closing of relay J 1, sub-switching operation.
Referring to Fig. 1, zero-sequence transformer LH has two secondary, and a secondary meets button SW1～SW4 and resistance R 9～R12, constitutes described electric leakage simulation circuit takes place.SW1 presses when button, LCD LED1 shows " A ", SW2 presses when button, LCD LED1 shows " B ", SW3 presses when button, and liquid crystal device LED1 shows " C ", and SW4 presses when button, LCD LED1 shows " E " or numeral (showing that " E " expression surpasses range, shows the numeral leakage current).
Referring to Fig. 1, positive terminating resistor R7 and the resistance R 8 of operational amplifier U1A～U1C, operational amplifier U1A negative terminal connects diode D3 negative electrode, diode D3 anode connecting resistance R1 and resistance R 2, operational amplifier U1B negative terminal connects diode D6 negative electrode, diode D6 anode connecting resistance R3 and resistance R 4, operational amplifier U1C negative terminal connects diode D7 negative electrode, diode D7 anode connecting resistance R5 and resistance R 6, operational amplifier U1A output terminating diode D4, operational amplifier U1B output terminating diode D5, operational amplifier U1C output terminating diode D8 constitutes described voltage detecting circuit.As one mutually or two-phase or three-phase voltage when being lower than set point, operational amplifier U1A or U1B or U1C output high level trigger bidirectional triode thyristor SCR1, and tripping coil J3 gets electric, and tripping coil J3 action makes the air circuit disjunction.Single-chip microcomputer U2 can also can directly trigger bidirectional triode thyristor SCR1 according to the electric leakage signal that detects simultaneously, makes the air circuit disjunction.
Referring to Fig. 1, meet LCD LED1 after resistance R 22～R28 parallel connection, triode T3～T5 emitter meets LCD LED1, constitutes described leakage current display circuit.The leakage current display circuit is directly driven by single-chip microcomputer U2, and single-chip microcomputer U2 exports demonstration according to leakage current, situation such as under-voltage.
Compared with similar products, this leakage comprehensive protector has the following advantages:
1, realized the protection of big leakage current scope.
2, realized that the three-phase leakage current shows, is convenient to the user and carries out accident analysis.
3, automatic closing and the separating brake of breaker have been realized.
4, realized the under-voltage protection function.
Claims (7)
1, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current, it comprises that circuit, voltage detecting circuit, power unit circuit, leakage current display circuit, electronic divide-shut brake control circuit take place for air circuit, breaking-closing operating mechanism, zero-sequence transformer (LH), single-chip microcomputer (U2), electric leakage simulation, it is characterized in that: it also is provided with multistage electric leakage signal amplifying circuit, and multistage electric leakage signal amplifying circuit has two-stage at least; Device (U3A) negative terminal connecting resistance (R19) is sent out in computing big and resistance (R20), positive terminating resistor (R17) and resistance (R18), output connecting resistance (R20) other end and resistance (R21), another termination capacitor of resistance (R19) (C7), another termination capacitor of electric capacity (C7) (C6) and resistance (R16), another termination capacitor of resistance (R16) (C5) and resistance (R15) constitute first order electric leakage signal amplifying circuit; Operational amplifier (U3B) negative terminal connecting resistance (R29) and resistance (R30), positive terminating resistor (R17) and resistance (R18), output connecting resistance (R30) other end and resistance (R31) constitute second level electric leakage signal amplifying circuit.
2, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current according to claim 1; it is characterized in that: single-chip microcomputer (U2) is the 16C72 chip; computing puts that to send out device (U3) big be the MCP602 chip, and the multiplication factor of second level electric leakage signal amplifying circuit is 2.
3, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current according to claim 1; it is characterized in that: the anode of transformer (B1) output terminating diode (D1) and diode (D2); 1 pin of integrated voltage-stabiliser tube (T1) connects negative electrode, electric capacity (C1), electric capacity (C2) anode of diode (D1) and diode (D2); 3 pin of integrated voltage-stabiliser tube (T1) connect electric capacity (C3) anode and electric capacity (C4), constitute described power unit circuit.
4, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current according to claim 1; it is characterized in that: relay (J1) coil one termination permanent magnet DC motor (M1), another termination triode (T2) collector electrode; triode (T2) base stage connecting resistance (R14) constitutes described electronic divide-shut brake control circuit.
5, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current according to claim 1; it is characterized in that: zero-sequence transformer (LH) has two secondary; secondary meets button (SW1～SW4) and resistance (R9～R12), constitute described electric leakage simulation circuit takes place.
6, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current according to claim 1, it is characterized in that: operational amplifier (positive terminating resistor (R7) and the resistance (R8) of U1A～U1C), operational amplifier (U1A) negative terminal connects diode (D3) negative electrode, diode (D3) anode connecting resistance (R1) and resistance (R2), operational amplifier (U1B) negative terminal connects diode (D6) negative electrode, diode (D6) anode connecting resistance (R3) and resistance (R4), operational amplifier (U1C) negative terminal connects diode (D7) negative electrode, diode (D7) anode connecting resistance (R5) and resistance (R6), operational amplifier (U1A) output terminating diode (D4), operational amplifier (U1B) output terminating diode (D5), operational amplifier (U1C) output terminating diode (D8) constitutes described voltage detecting circuit; As one mutually or two-phase or three-phase voltage when being lower than set point, operational amplifier (U1A) or (U1B) or (U1C) output high level trigger bidirectional triode thyristor (SCR1), tripping coil (J3) electric, tripping coil (J3) action makes the air circuit disjunction; Single-chip microcomputer (U2) directly triggers bidirectional triode thyristor (SCR1) according to the electric leakage signal that detects simultaneously, makes the air circuit disjunction.
7, a kind of intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current according to claim 1; it is characterized in that: resistance (R22～R28) connect LCD (LED1) after the parallel connection; (T3～T5) emitter connects LCD (LED1) to triode; constitute described leakage current display circuit; the leakage current display circuit is directly driven by single-chip microcomputer (U2), and single-chip microcomputer (U2) is exported demonstration according to leakage current, undervoltage condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520003641 CN2765360Y (en) | 2005-01-17 | 2005-01-17 | Heavy-current intelligent composite protector for electric leakage with phase discrimination and amplitude discrimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520003641 CN2765360Y (en) | 2005-01-17 | 2005-01-17 | Heavy-current intelligent composite protector for electric leakage with phase discrimination and amplitude discrimination |
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| CN2765360Y true CN2765360Y (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520003641 Expired - Lifetime CN2765360Y (en) | 2005-01-17 | 2005-01-17 | Heavy-current intelligent composite protector for electric leakage with phase discrimination and amplitude discrimination |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645703B (en) * | 2005-01-17 | 2012-01-11 | 浙江上力电器有限公司 | Intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current |
| CN102857152A (en) * | 2011-06-28 | 2013-01-02 | 王金忠 | Electromagnetic starter and detection method thereof |
| CN103427394A (en) * | 2013-09-06 | 2013-12-04 | 天津华宁电子有限公司 | Mining flame-proof type selective leakage protector |
| CN103855682A (en) * | 2013-03-25 | 2014-06-11 | 刘圣平 | Failure-proof control circuit chip and safe electric leakage protector |
| CN115207880A (en) * | 2022-08-09 | 2022-10-18 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
-
2005
- 2005-01-17 CN CN 200520003641 patent/CN2765360Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645703B (en) * | 2005-01-17 | 2012-01-11 | 浙江上力电器有限公司 | Intelligent phase demodulating and amplitude discrimination leakage comprehensive protector with big current |
| CN102857152A (en) * | 2011-06-28 | 2013-01-02 | 王金忠 | Electromagnetic starter and detection method thereof |
| CN103855682A (en) * | 2013-03-25 | 2014-06-11 | 刘圣平 | Failure-proof control circuit chip and safe electric leakage protector |
| CN103427394A (en) * | 2013-09-06 | 2013-12-04 | 天津华宁电子有限公司 | Mining flame-proof type selective leakage protector |
| CN103427394B (en) * | 2013-09-06 | 2015-08-12 | 天津华宁电子有限公司 | A kind of mining explosion-isolating low-voltage selective earth leakage protection device |
| CN115207880A (en) * | 2022-08-09 | 2022-10-18 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
| CN115207880B (en) * | 2022-08-09 | 2023-12-19 | 河北烈焰机械工程有限公司 | Intelligent asphalt mixing equipment management system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG SHANGLI ELECTRONIC CO.,LTD. Free format text: FORMER OWNER: ZHENG XIANGHENG Effective date: 20090724 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090724 Address after: Yueqing City, Zhejiang Province town of Liushi Liu Weng Lu No. 108 Xin Lei building, 8 floor, zip code: 325604 Patentee after: Zhejiang ShangLi Electric Co., Ltd. Address before: Yueqing City, Zhejiang province Liushi Town, Changhong Industrial Zone, No. 54, Evergreen Road Appliance Co., Ltd., zip code: 325604 Patentee before: Zheng Xiangheng |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20060315 Effective date of abandoning: 20120502 |