CN204538657U - A kind of high sensitivity electrical shock safety protective circuit - Google Patents
A kind of high sensitivity electrical shock safety protective circuit Download PDFInfo
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- CN204538657U CN204538657U CN201520256082.6U CN201520256082U CN204538657U CN 204538657 U CN204538657 U CN 204538657U CN 201520256082 U CN201520256082 U CN 201520256082U CN 204538657 U CN204538657 U CN 204538657U
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Abstract
The utility model discloses a kind of high sensitivity electrical shock safety protective circuit; comprise relay J, rectifier bridge T, current transformer W and unidirectional thyristor Q1; one end of the winding N1 of described current transformer W connects the contact J-1 of relay J; the other end of the other end contact resistance R1 of the contact J-1 of relay J, relay J and fuse FU, fuse FU connects 220V alternating current.The utility model electrical shock safety protective circuit adopts SF54123 type electric leakage safeguard protection special chip as master control original paper; once there is electric shock accidents on electricity consumption main circuit; the response that can be exceedingly fast; disconnect main circuit on the one hand; send on the other hand chimes of doom remind near people take rescue in time, therefore circuit have be quick on the draw, precision is high, the advantage of diverse in function.
Description
Technical field
The utility model relates to a kind of safety protective circuit, specifically a kind of high sensitivity electrical shock safety protective circuit.
Background technology
Electric power is the energy the most frequently used in people's daily life; but electric power lives that to produce also be simultaneously the arch-criminal of various electric shock accidents easily bringing people; although in recent years; along with electronic industry and expanding economy; Electrical Safety standard improves constantly; the probability of happening of electric shock accidents is effectively reduced, but still thoroughly cannot stop electric shock accidents due to the reason that safety electric shock protective device response speed is slow, sensitivity is low used at present.
Utility model content
The purpose of this utility model is to provide a kind of stable performance, highly sensitive high sensitivity electrical shock safety protective circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of high sensitivity electrical shock safety protective circuit, comprise relay J, rectifier bridge T, current transformer W and unidirectional thyristor Q1, one end of the winding N1 of described current transformer W connects the contact J-1 of relay J, the other end contact resistance R1 of the contact J-1 of relay J, relay J and fuse FU, the other end of fuse FU connects 220V alternating current, the other end of the winding N1 of current transformer W connects load A, the other end of load A connects the contact J-2 of relay J, the other end of the contact J-2 of relay J connects the port 2 of rectifier bridge T and the other end of 220V alternating current, the other end of relay J connects the port 4 of rectifier bridge T, the port one contact resistance R2 of rectifier bridge T and the anode of unidirectional thyristor Q1, the other end of resistance R2 connects the pin 1 of electric capacity C1 and chip IC 1, the other end of electric capacity C1 connects electric capacity C3, electric capacity C5, electric capacity C6, loudspeaker B, the port 3 of rectifier bridge T and the pin 3 of chip IC 2, the other end of electric capacity C3 connects electric capacity C4, resistance R4, the winding N2 of the pin 1 summation current transformer W of chip IC 2, the other end contact resistance R3 of the winding N2 of current transformer W, the other end of resistance R4 and the other end of electric capacity C4, the other end of resistance R3 connects the pin 2 of chip IC 2, the other end of electric capacity C5 connects the pin 4 of chip IC 2 and the pin 5 of chip IC 2, pin 2 ground connection of chip IC 1, the pin 3 of chip IC 1 connects the pin 8 of chip IC 2, the pin 6 of chip IC 2 connects electric capacity C2, the pin 7 of chip IC 2 connects the other end of electric capacity C2, the other end of electric capacity C6 and the control pole of unidirectional thyristor Q1, the other end of loudspeaker B connects the negative electrode of unidirectional thyristor Q1, the model of described chip IC 1 is LM7809, the model of described chip IC 2 is SF54123.
As preferred version of the present utility model: described relay J is normally-closed contact relay.
Compared with prior art; the beneficial effects of the utility model are: the utility model electrical shock safety protective circuit adopts SF54123 type electric leakage safeguard protection special chip as master control original paper; once there is electric shock accidents on electricity consumption main circuit; the response that can be exceedingly fast; disconnect main circuit on the one hand; send on the other hand chimes of doom remind near people take rescue in time, therefore circuit have be quick on the draw, precision is high, the advantage of diverse in function.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of high sensitivity electrical shock safety protective circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of high sensitivity electrical shock safety protective circuit, comprise relay J, rectifier bridge T, current transformer W and unidirectional thyristor Q1, one end of the winding N1 of described current transformer W connects the contact J-1 of relay J, the other end contact resistance R1 of the contact J-1 of relay J, relay J and fuse FU, the other end of fuse FU connects 220V alternating current, the other end of the winding N1 of current transformer W connects load A, the other end of load A connects the contact J-2 of relay J, the other end of the contact J-2 of relay J connects the port 2 of rectifier bridge T and the other end of 220V alternating current, the other end of relay J connects the port 4 of rectifier bridge T, the port one contact resistance R2 of rectifier bridge T and the anode of unidirectional thyristor Q1, the other end of resistance R2 connects the pin 1 of electric capacity C1 and chip IC 1, the other end of electric capacity C1 connects electric capacity C3, electric capacity C5, electric capacity C6, loudspeaker B, the port 3 of rectifier bridge T and the pin 3 of chip IC 2, the other end of electric capacity C3 connects electric capacity C4, resistance R4, the winding N2 of the pin 1 summation current transformer W of chip IC 2, the other end contact resistance R3 of the winding N2 of current transformer W, the other end of resistance R4 and the other end of electric capacity C4, the other end of resistance R3 connects the pin 2 of chip IC 2, the other end of electric capacity C5 connects the pin 4 of chip IC 2 and the pin 5 of chip IC 2, pin 2 ground connection of chip IC 1, the pin 3 of chip IC 1 connects the pin 8 of chip IC 2, the pin 6 of chip IC 2 connects electric capacity C2, the pin 7 of chip IC 2 connects the other end of electric capacity C2, the other end of electric capacity C6 and the control pole of unidirectional thyristor Q1, the other end of loudspeaker B connects the negative electrode of unidirectional thyristor Q1, the model of described chip IC 1 is LM7809, the model of described chip IC 2 is SF54123.
Relay J is normally-closed contact relay.
Operation principle of the present utility model is: when mains circuit is normally run, and 220V alternating current is on the one hand through the contact J-1 of fuse FU, relay J, power to load A.On the other hand, 220V alternating current is added to rectifier bridge T through relay J and carries out rectification, then through resistor R2 step-down, after filtering capacitor C1 filtering, forming direct voltage, for being that the control circuit of core provides required direct current power source voltage with SF54123, being added to integrated circuit from 8 pin of SF54123.Time on the backbone of 220V AC power without drain conditions, 220V AC power, just by backbone, load A On current, forms current circuit.At this moment, on the winding N2 of instrument transformer W, influence electricity miscarriage is raw, and between 1 pin of SF54123,2 pin, coating-forming voltage is poor, and IC interior is in static operating state, and 7 pin of SF54123 are also with regard to Triggerless output, and unidirectional thyristor Q1 ends.At this moment only have the very little electric current being in quiescent operation for SF54123 to flow through relay J, be not enough to drive relay, therefore relay be failure to actuate, 220V AC power by line to load H normal power supply.
When there being human contact's civil power live wire, when forming shock current over the ground, be equivalent to live wire to the earth electric leakage, also equal live wire adds passage from a leakage current to the earth, this leakage current would not reflux from zero line.Like this, induced potential is produced immediately in instrument transformer winding N2, and at 1 pin with SF54123, generation current in the loop that 2 pin are formed, induced voltage is produced again on resistor R4, this voltage is based on the reference voltage of 1 pin of SF54123, 2 pin of SF54123 and 1 pin is made to form certain voltage poor, and by SF541231 pin, 2 pin be added to IC interior comparison amplifier in the same way with on reverse two input ends, because the voltage of comparison amplifier two input ends has difference, so the rapid output current of comparison amplifier, locking trigger is opened after electric capacity C5 integration, make 7 pin of SF54123 export triggering signal and control unidirectional thyristor Q1 conducting.After Q1 conducting, relay J must conduct, and its normally-closed contact J-1 and J-2 disconnects main circuit, and meanwhile, loudspeaker B sends chimes of doom.Circuit adopts SF54123 type electric leakage safeguard protection special chip as master control original paper; once there is electric shock accidents on electricity consumption main circuit; the response that can be exceedingly fast; disconnect main circuit on the one hand; send on the other hand chimes of doom remind near people take rescue in time, therefore circuit have be quick on the draw, precision is high, the advantage of diverse in function.
Claims (2)
1. a high sensitivity electrical shock safety protective circuit, comprises relay J, rectifier bridge T, current transformer W and unidirectional thyristor Q1, it is characterized in that, one end of the winding N1 of described current transformer W connects the contact J-1 of relay J, the other end contact resistance R1 of the contact J-1 of relay J, relay J and fuse FU, the other end of fuse FU connects 220V alternating current, the other end of the winding N1 of current transformer W connects load A, the other end of load A connects the contact J-2 of relay J, the other end of the contact J-2 of relay J connects the port 2 of rectifier bridge T and the other end of 220V alternating current, the other end of relay J connects the port 4 of rectifier bridge T, the port one contact resistance R2 of rectifier bridge T and the anode of unidirectional thyristor Q1, the other end of resistance R2 connects the pin 1 of electric capacity C1 and chip IC 1, the other end of electric capacity C1 connects electric capacity C3, electric capacity C5, electric capacity C6, loudspeaker B, the port 3 of rectifier bridge T and the pin 3 of chip IC 2, the other end of electric capacity C3 connects electric capacity C4, resistance R4, the winding N2 of the pin 1 summation current transformer W of chip IC 2, the other end contact resistance R3 of the winding N2 of current transformer W, the other end of resistance R4 and the other end of electric capacity C4, the other end of resistance R3 connects the pin 2 of chip IC 2, the other end of electric capacity C5 connects the pin 4 of chip IC 2 and the pin 5 of chip IC 2, pin 2 ground connection of chip IC 1, the pin 3 of chip IC 1 connects the pin 8 of chip IC 2, the pin 6 of chip IC 2 connects electric capacity C2, the pin 7 of chip IC 2 connects the other end of electric capacity C2, the other end of electric capacity C6 and the control pole of unidirectional thyristor Q1, the other end of loudspeaker B connects the negative electrode of unidirectional thyristor Q1, the model of described chip IC 1 is LM7809, the model of described chip IC 2 is SF54123.
2. a kind of high sensitivity electrical shock safety protective circuit according to claim 1, it is characterized in that, described relay J is normally-closed contact relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520256082.6U CN204538657U (en) | 2015-04-24 | 2015-04-24 | A kind of high sensitivity electrical shock safety protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520256082.6U CN204538657U (en) | 2015-04-24 | 2015-04-24 | A kind of high sensitivity electrical shock safety protective circuit |
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| CN204538657U true CN204538657U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520256082.6U Expired - Fee Related CN204538657U (en) | 2015-04-24 | 2015-04-24 | A kind of high sensitivity electrical shock safety protective circuit |
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| CN (1) | CN204538657U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617510A (en) * | 2015-01-22 | 2015-05-13 | 四川省川东高压电器有限公司 | Low-voltage drawing type switch cabinet with electricity leakage alarming function |
| CN107658854A (en) * | 2017-09-27 | 2018-02-02 | 西安工业大学 | A kind of electric power earth leakage protective device |
-
2015
- 2015-04-24 CN CN201520256082.6U patent/CN204538657U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617510A (en) * | 2015-01-22 | 2015-05-13 | 四川省川东高压电器有限公司 | Low-voltage drawing type switch cabinet with electricity leakage alarming function |
| CN107658854A (en) * | 2017-09-27 | 2018-02-02 | 西安工业大学 | A kind of electric power earth leakage protective device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |