CN100578884C - Electric power terminal protectors with automatic load detection - Google Patents
Electric power terminal protectors with automatic load detection Download PDFInfo
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- CN100578884C CN100578884C CN200710027533A CN200710027533A CN100578884C CN 100578884 C CN100578884 C CN 100578884C CN 200710027533 A CN200710027533 A CN 200710027533A CN 200710027533 A CN200710027533 A CN 200710027533A CN 100578884 C CN100578884 C CN 100578884C
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- 230000001012 protector Effects 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title claims description 6
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
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Abstract
The invention discloses an electric terminal protector with automatic load detecting function, which includes a microprocessor, a driving circuit, a short-circuit diagnostic circuit in power off state and a creepage diagnostic circuit and a main switch, wherein the input port of the short-circuit diagnostic circuit is connected to a phase wire and a neutral line of a source output circuitry which is directly connected to load via the main switch; the input port of the creepage diagnostic circuit is connected to the phase wire of a source output circuitry which is directly connected to load via the main switch, and the output port of the same is connected to an input port of the microprocessor. A load state diagnostic circuit firstly detects the state of load to determine whether existing hidden troubles like short circuit, creepage and so on, and then the short-circuit diagnostic circuit and the creepage diagnostic circuit transmits corresponding control signal to the microprocessor to lock the driving circuit and display the failure and give alert. The main switch will not be turned on until the hidden troubles are all eliminated, thus a more convenient, safe protection device can be provided for safety electricity consumption.
Description
Technical field
The present invention relates to a kind of electric power protection device.Especially the electric power terminal protectors that a kind of power domain uses with automatic load detection.
Background technology
The existing power protector is for prevent that the security incident that alive circuit causes from can play a role when short circuit and electric leakage are got an electric shock; but generally all be the mechanical protection that adopts passive type; just need to connect the electric power protection device to after the load energising; carry out short circuit by current conditions in current transformer detection load or the power circuit; electric leakage; overload etc. detects judges the drive power switch action again; if but there are situations such as leak electricity short-circuit in equipment that is connected with tape jam on the line behind the protector or power circuit itself; the moment of connecting at traditional electric power protection device may cause security incident, and does not have the effect of protection.
Summary of the invention
The object of the present invention is to provide a kind of electric power terminal protectors that automatic load detects that has; before connecting power supply, protector can the state of load end be detected; judge whether to exist states such as zero load, electric leakage, short circuit; if have protector refusal connection power supply so, make security protection more perfect, reliable.
The present invention realizes above-mentioned purpose like this:
Has the electric power terminal protectors that automatic load detects, comprise microprocessor, drive circuit and main switch, the output of microprocessor connects drive circuit and main switch successively, and described electric power terminal protectors also comprises short circuit diagnostic circuit and the electric leakage diagnostic circuit under the off-position; The input of short circuit diagnostic circuit links to each other with zero line with the phase line of following the direct-connected power supply output line of load road by main switch, and wherein, the output of short circuit diagnostic circuit links to each other with the input of microprocessor; The input of electric leakage diagnostic circuit links to each other with the phase line of following the direct-connected power supply output line of load road by main switch, the output of electric leakage diagnostic circuit links to each other with the input of microprocessor, described short circuit diagnostic circuit comprises by triode, the oscillating circuit that coupling transformer and peripheral cell thereof are formed, the base stage of triode first resistance of connecting links to each other with output end of microprocessor, the collector and emitter of triode respectively with first primary coil of coupling transformer, one end of second primary coil links to each other, the other end of first primary coil of coupling transformer is connected and is linked to each other with the input of microprocessor behind second resistance, and the second subprime coil of coupling transformer is connected and linked to each other with zero line with the phase line of power supply output line respectively behind first diode.
The invention has the beneficial effects as follows: before the closed power supply of protector; the load condition testing circuit at first detects the state of load; whether there is short circuit; states such as electric leakage; if above-mentioned hidden danger; load condition testing circuit output control signal corresponding is to microprocessor so; drive circuit is locked; even if automatically; remote control; manually wait switch controlling signal that main switch is connected; and do to be out of order and show and warning; have only and get rid of the connection that could realize main switch after the hidden danger, thereby provide more convenient for safety utilization of electric power; the protective device of safety.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is a frame principle figure of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
With reference to Fig. 1, has the electric power terminal protectors that automatic load detects, comprise short circuit diagnostic circuit 2 and electric leakage diagnostic circuit 3 and main switch CF-K1 under microprocessor IC1, drive circuit 1, the off-position, the output of microprocessor IC1 connects drive circuit 1 and main switch CF-K1 successively; The input of short circuit diagnostic circuit 2 links to each other with zero line with the phase line of following the direct-connected power supply output line of load road by main switch CF-K1, and output links to each other with the input of microprocessor IC1; The input of electric leakage diagnostic circuit 3 links to each other with the phase line of following the direct-connected power supply output line of load road by main switch CF-K1, and output links to each other with the input of microprocessor IC1.Before the closed power supply of protector; the load condition testing circuit at first detects the state of load; whether there is zero load; short circuit; states such as electric leakage; if above-mentioned hidden danger; load condition testing circuit output control signal corresponding is to microprocessor IC1 so; drive circuit is locked; even if automatically; remote control; manually wait switch controlling signal that main switch CF-K1 is connected; and do to be out of order and show and warning; have only and get rid of the connection that could realize main switch CF-K1 after the hidden danger, thereby provide more convenient for safety utilization of electric power; the protective device of safety.
In addition, also be provided with load agreement circuit 4, its input connects load, and whether output connects the input of microprocessor IC1, be used to detect load and link to each other with power supply output line.
Be explained in detail according to the structure and the function thereof of circuit theory diagrams below, with reference to Fig. 2 each circuit among the present invention.
A. drive circuit 1, and the signal output that is used to receive microprocessor IC1 realizes opening, closing or delay operation to main switch through amplifying after, therefore comprises and opens drive circuit 2, shutoff drive circuit 3 and delay driving circuit 4.Unlatching drive circuit 2 is connected to form by the electromagnetically operated valve adhesive winding coil of resistance R 14, capacitor C 16, triode Q4, Q5, diode D12 and main switch.When needs were closed with main switch, the 13 pin output high level of microprocessor IC1 to triode Q4 base stage, made triode Q4, Q5 conducting through resistance R 14, and the electromagnetically operated valve adhesive winding coil of main switch gets electric contact closure with main switch and connects load so.Shutoff drive circuit 3 is connected to form by the electromagnetically operated valve release winding coil of resistance R 15, capacitor C 17, triode Q6, Q7, diode D13 and main switch.When needs disconnected main switch, 12 pin of microprocessor IC1 output high level to triode Q4 base stage, made triode Q6, Q7 conducting through resistance R 15, and the electromagnetically operated valve of main switch discharges winding coil and gets electric contact with main switch and discharge disconnecting consumers so.Delay driving circuit 4 is connected to form by the electromagnetically operated valve delay winding coil of resistance R 16, capacitor C 18, triode Q8, Q9 and main switch.By 24 pin of microprocessor IC1 output high level through resistance R 16 to triode Q8 base stage, make triode Q8, Q9 conducting, the electromagnetically operated valve that drives main switch postpones winding coil control main switch contact and delays time and be switched on or switched off load.
B. the short circuit diagnostic circuit 2, be used under the off-position detecting the fault whether load or out-put supply circuit exist short circuit, comprise by triode Q10, the oscillating circuit that coupling transformer BL3 and peripheral cell thereof are formed, the base stage of triode Q10 first resistance R 19 of connecting links to each other with microprocessor IC1 output, the collector and emitter of triode Q10 respectively with first of coupling transformer BL3, the second primary coil L1, the end of L2 links to each other, the first primary coil L1 of coupling transformer BL3 second resistance R 18 back of connecting links to each other with the input of microprocessor IC1, links to each other with zero line with the phase line on power supply output line road respectively behind the second subprime coil L4 series diode D15 of coupling transformer BL3.The operation principle of circuit is: before main switch CF-K1 does not also connect load, 26 pin of microprocessor IC1 output high level earlier impel oscillating circuit work, secondary coil L4 at coupling transformer BL3 produces induced potential, A point in the circuit keeps high potential simultaneously, the current potential of this point is detected through second resistance R 18 by 3 pin of microprocessor IC1, if keep high potential then load is described or the fault of short circuit does not appear in the out-put supply line.Occurring under the situation of short circuit, the phase line of out-put supply circuit and the impedance between the zero line just is during less than set point (short circuit set point), the loop of second subprime coil L4 produces bigger short circuit current, thereby cause the operating voltage of oscillating circuit to descend, just A point current potential descends and is detected by 3 pin of microprocessor IC1 and obtains the short trouble signal in the circuit, even if receiving the signal microprocessor IC1 that operation control circuit sends closed main switch, microprocessor IC1 this moment can not export high level to opening drive circuit 2 yet, carry out fault prompting and warning simultaneously, till trouble shooting.
C. diagnostic circuit 3 leaks electricity, be used to detect the situation that whether has electric leakage under the not energising situation that loads on, circuit comprises the first photoelectrical coupler IC3B, the input of the first photoelectrical coupler IC3B is connected, and the 3rd resistance R 28 links to each other with power supply and the 4th resistance R 29 of connecting links to each other with the ground wire of following the direct-connected power supply output line of load road, another input links to each other with the phase line of following the direct-connected power supply output line of load road by main switch JK55, and the output of the first photoelectrical coupler IC3B links to each other with the negative pole of power supply and the input of microprocessor IC1 respectively.Situation when load or the appearance electric leakage of power supply output line road, just there are certain resistance in the live wire of out-put supply circuit and ground wire, first photoelectrical coupler IC3B conducting this moment, its 8 pin output low level is to 3 pin of microprocessor IC1, can not export high level to opening drive circuit 2, till trouble shooting even if receive the signal microprocessor IC that operation control circuit 13 sends closed main switch this moment.
D. whether load agreement circuit 4 is used to detect load and links to each other with the power supply output line road.Circuit is made up of the second photoelectrical coupler IC3A, the end of another first secondary coil of coupling transformer BL3 L3 is connected and is linked to each other with the input of the second photoelectrical coupler IC3A behind the second diode D14, and another input of the other end of the first secondary coil L3 and the second photoelectrical coupler IC3A links to each other with the phase line on power supply output line road by main switch CF-K1 respectively; The end that the second diode D14 links to each other with the second photoelectrical coupler IC3A and and the other end of second subprime coil L4 between be connected with filter capacitor C19; The output of the second photoelectrical coupler IC3A links to each other with the negative pole of power supply and the input of microprocessor IC1 respectively.Because all there is certain input resistance in general load, second photoelectrical coupler IC3A conducting this moment, output 6 pin output low levels are to input 2 pin of microprocessor IC1, load just normally is connected on the power supply output line road, under the control signal of operation control circuit 13, microprocessor IC1 can export high level to opening drive circuit 2, makes the contact closure of main switch switch on.
Certainly can also comprise that as electric power terminal protectors the circuit of other function cooperates running; as load and overload sample circuit 5; short circuit triggers shut-off circuit 6; overvoltage and under-voltage sample circuit 7; electric leakage sample circuit 8; power supply regulator circuit 9; operation control circuit 10; condition prompting and warning circuit 11; to of overload and the short circuit of operating load equipment in the electric power transmission network burst; electric leakage; overvoltage; under-voltage; phase shortage; induction lightening seals in operational network and constitutes when destroying and can discern automatically; automatically enter protection, for load power consumption equipment safe operation must through window safety curtain is provided.
Claims (4)
1. has the electric power terminal protectors that automatic load detects, comprise microprocessor (IC1), drive circuit (1) and main switch (CF-K1), the output of microprocessor (IC1) connects drive circuit (1) and main switch (CF-K1) successively, it is characterized in that described electric power terminal protectors also comprises short circuit diagnostic circuit (2) and the electric leakage diagnostic circuit (3) under the off-position; The input of short circuit diagnostic circuit (2) links to each other with zero line with the phase line of following the direct-connected power supply output line of load road by main switch (CF-K1), and wherein, the output of short circuit diagnostic circuit (2) links to each other with the input of microprocessor (IC1); The input of electric leakage diagnostic circuit (3) links to each other with the phase line of following the direct-connected power supply output line of load road by main switch (CF-K1), the output of electric leakage diagnostic circuit (3) links to each other with the input of microprocessor (IC1), described short circuit diagnostic circuit (2) comprises by triode (Q10), the oscillating circuit that coupling transformer (BL3) and peripheral cell thereof are formed, the base stage of triode (Q10) first resistance (R19) of connecting links to each other with microprocessor (IC1) output, the collector and emitter of triode (Q10) respectively with first primary coil (L1) of coupling transformer (BL3), one end of second primary coil (L2) links to each other, the other end of first primary coil (L1) of coupling transformer (BL3) is connected, and second resistance (R18) is back to link to each other with the input of microprocessor (IC1), links to each other with zero line with the phase line of power supply output line respectively behind second subprime coil (L4) series connection first diode (D15) of coupling transformer (BL3).
2. the electric power terminal protectors with automatic load detection according to claim 1; the diagnostic circuit (3) that it is characterized in that leaking electricity comprises first photoelectrical coupler (IC3B); one input of first photoelectrical coupler (IC3B) is connected, and the 3rd resistance (R28) links to each other with power supply and the 4th resistance (R29) of connecting links to each other with the ground wire of following the direct-connected power supply output line of load road; another input of first photoelectrical coupler (IC3B) links to each other with the phase line of following the direct-connected power supply output line of load road by main switch (CF-K1), and the output of first photoelectrical coupler (IC3B) links to each other with the negative pole of power supply and the input of microprocessor (IC1) respectively.
3. the electric power terminal protectors with automatic load detection according to claim 1 is characterized in that also being provided with load agreement circuit (4), and its input connects load, and output connects the input of microprocessor (IC1).
4. the electric power terminal protectors with automatic load detection according to claim 3, it is characterized in that load agreement circuit (4), (IC3A) forms by second photoelectrical coupler, one end of first secondary coil (L3) of coupling transformer (BL3) is connected, and second diode (D14) is back to link to each other with an input of second photoelectrical coupler (IC3A), and another input of the other end of first secondary coil (L3) and second photoelectrical coupler (IC3A) links to each other with the phase line of power supply output line by main switch (CF-K1) respectively; Be connected with filter capacitor (C19) between the end that second diode (D14) links to each other with second photoelectrical coupler (IC3A) and the other end of second subprime coil (L4); The output of second photoelectrical coupler (IC3A) links to each other with the negative pole of power supply and the input of microprocessor (IC1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710027533A CN100578884C (en) | 2007-04-13 | 2007-04-13 | Electric power terminal protectors with automatic load detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710027533A CN100578884C (en) | 2007-04-13 | 2007-04-13 | Electric power terminal protectors with automatic load detection |
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| Publication Number | Publication Date |
|---|---|
| CN101039022A CN101039022A (en) | 2007-09-19 |
| CN100578884C true CN100578884C (en) | 2010-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710027533A Expired - Fee Related CN100578884C (en) | 2007-04-13 | 2007-04-13 | Electric power terminal protectors with automatic load detection |
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| Country | Link |
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| CN (1) | CN100578884C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3633465B1 (en) * | 2017-05-31 | 2022-05-04 | Panasonic Intellectual Property Management Co., Ltd. | Diagnostic apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2217853Y (en) * | 1994-10-08 | 1996-01-17 | 王晓进 | Intelligent monitoring stablizing protector for ac. electric power supply |
| CN1455484A (en) * | 2003-06-09 | 2003-11-12 | 湖南大学 | Intelligent contactless switch |
| CN201051650Y (en) * | 2007-04-13 | 2008-04-23 | 郭振清 | Power terminal protector with automatic load detection |
-
2007
- 2007-04-13 CN CN200710027533A patent/CN100578884C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2217853Y (en) * | 1994-10-08 | 1996-01-17 | 王晓进 | Intelligent monitoring stablizing protector for ac. electric power supply |
| CN1455484A (en) * | 2003-06-09 | 2003-11-12 | 湖南大学 | Intelligent contactless switch |
| CN201051650Y (en) * | 2007-04-13 | 2008-04-23 | 郭振清 | Power terminal protector with automatic load detection |
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| Publication number | Publication date |
|---|---|
| CN101039022A (en) | 2007-09-19 |
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