CN210111591U - Potential type leakage protection system - Google Patents
Potential type leakage protection system Download PDFInfo
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- CN210111591U CN210111591U CN201920692606.4U CN201920692606U CN210111591U CN 210111591 U CN210111591 U CN 210111591U CN 201920692606 U CN201920692606 U CN 201920692606U CN 210111591 U CN210111591 U CN 210111591U
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- 238000005267 amalgamation Methods 0.000 description 2
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Abstract
The utility model relates to a switch protection field discloses a potential formula earth leakage protection system, including zero line, live wire, closed magnetic flux, electro-magnet and circuit breaker, the first end of zero line and live wire is connected switch load end, and the second end is connected to respectively and connects accurate resistance from the output of unidirectional conductive tube behind the unidirectional conductive tube, and the accurate resistance end that is connected respectively with zero line and live wire connects the input of first accurate relay, and the output of first accurate relay connects current-limiting resistor, and current-limiting resistor's end connection ground wire, with electrical apparatus metal casing or frame; the second end of live wire and zero line passes and connects the cut-off switch after closed magnetic flux, and closed magnetic flux is connected in the input of second precision relay, and the first end of electro-magnet is connected to the output of second precision relay, and the cut-off switch end is connected to the second end of electro-magnet, and the output of first precision relay is connected with the output of second precision relay. The ground wire grounding device effectively solves the potential safety hazards caused by poor grounding and failure of the ground wire, and the electricity environment is more green and safe.
Description
Technical Field
The utility model relates to a switch protection field, concretely relates to electric potential formula earth leakage protection system.
Background
Today of social civilization and scientific and technological development, various leakage protection switches provide effective safe power utilization protection for people in daily life, but have a common defect that corresponding circuit breaking action protection cannot be generated when a zero line firstly contacts a metal shell of a general electric appliance or the zero line firstly contacts the ground in the power utilization process, and when the grounding state of the electric appliance is changed and is in a bad state (the electric appliance is in an insulator or a semi-insulator and a grounding wire is disconnected), a live wire does not contact the live wire to perform circuit breaking action protection; however, this technique has the following disadvantages:
1. even if the grounding is good in the power utilization environment, the zero line and the ground wire are in direct contact or indirect contact with the leakage protection switch, and the leakage protection switch still can be in the power supply state.
2. When the electric appliance is in an environment with poor grounding or not grounding, particularly when the electric appliance is positioned on the insulator and the semi-insulator, even if the shell of the electric appliance is electrified by a live wire, the leakage protection switch cannot act for open circuit protection because the open circuit action current cannot be formed, at the moment, the electric appliance is like a charged body, and when people do not contact the electric appliance, the electric appliance has electric shock safety hidden trouble. Therefore, improvements in the prior art are needed.
SUMMERY OF THE UTILITY MODEL
The application provides a potential type leakage protection system for solving the potential safety hazard problem of the existing leakage switch.
In order to achieve the above object, the utility model adopts the following technical scheme:
a potential leakage protection system comprises a zero line, a live line, a closed magnetic flux, an electromagnet and a circuit breaker, wherein the first ends of the zero line and the live line are connected with a switch load end, the second ends of the zero line and the live line are respectively connected to a unidirectional conductive tube and then connected with a precision resistor from the output end of the unidirectional conductive tube, the precision resistor ends respectively connected with the zero line and the live line are connected with the input end of a first precision relay, the output end of the first precision relay is connected with a current-limiting resistor, and the tail end of the current-limiting resistor is connected with a ground wire, an electric appliance metal shell or a frame; the second ends of the live wire and the zero wire penetrate through the closed magnetic flux and then are connected with the circuit breaker, the closed magnetic flux is connected to the input end of the second precision relay, the output end of the second precision relay is connected with the first end of the electromagnet, the second end of the electromagnet is connected with the circuit breaker, and the output end of the first precision relay is connected with the output end of the second precision relay.
In the above-mentioned potential leakage protection system, the unidirectional conductive tube is a diode.
In the potential leakage protection system, the closed magnetic flux is provided with the potential coil, and the potential coil is connected to the input end of the second precision relay.
According to the potential leakage protection system of the above embodiment, the scheme has the following effects:
1. the potential safety hazards caused by poor grounding and failure of the ground wire are effectively solved;
2. the electric shock potential safety hazard of the electrical appliance in a damaged open-shell state is prevented;
3. by applying the potential principle, the tripping and tripping safety protection is based on the earth potential change among power supply lines, and the reliability and the anti-interference performance of a trigger action signal are higher than those of other modes.
4. Simple structure, no need of complex circuit elements, ICs and the like, low manufacturing cost and high safety and reliability.
5. The phenomenon of large-current short circuit between the zero line and the ground wire and the live wire under the contact state of the zero line and the ground wire with the metal shell, the metal frame, the electric conductor and the like of the electric appliance is inhibited.
6. The optimal safety protection scheme of the power supply equipment (such as a three-phase 200V power supply and the like) which does not generate electric leakage to the ground.
7. The technology is unique in technical characteristics, and can be applied to household electricity, mechanical equipment, various sockets and the like, so that the electricity environment is more green and safe.
Drawings
Fig. 1 is a connection block diagram of a potential leakage protection system.
Reference is made to the following in corresponding reference numbers in the drawings of the specification:
the device comprises a closed magnetic flux 1, an electromagnet 2, a circuit breaker 3, a unidirectional conductive tube 4, a precision resistor 5, a first precision relay 6, a current-limiting resistor 7, a second precision relay 8 and a potential coil 9.
Detailed Description
In order to make the technical means, the inventive features, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings.
The embodiment of the utility model discloses a potential formula earth leakage protection system, as shown in fig. 1, including zero (N) line, fire (L) line, closed magnetic flux 1, electro-magnet 2 and circuit breaker 3, the first end linked switch load end of zero line and live wire, second end is connected two precision resistance 5 from the output of unidirectional conductive tube 4 after homopolarity inserts unidirectional conductive tube 4 respectively, unidirectional conductive tube 4 is the diode, two precision resistance 5 end amalgamations, form the homopolarity public end (COM1) of L line N line, connect the input of first precision relay 6 after the amalgamation, current limiting resistance 7 is connected to the output of first precision relay 6, current limiting resistance 7's end (COM2) is connected the ground wire, with electrical apparatus metal casing or frame; the second end of live wire and zero line passes behind closed magnetic flux 1 and connects the cut-off switch, closed magnetic flux 1 is connected in the input of second precision relay 8, the first end of electro-magnet 2 is connected to the output of second precision relay 8, can produce the first precision relay 6 of potential drive between COM2 and the L line when zero line N leads to the general electrical apparatus shell of ground wire, control electro-magnet 2 carries out the action of opening circuit, the live wire leads to the general electrical apparatus shell of ground wire the same reason, 3 ends of cut-off switch are connected to the second end of electro-magnet 2, and the output of first precision relay 6 is connected with the output of second precision relay 8.
Further, a potential coil 9 is provided on the closing magnetic flux 1, and the potential coil 9 is connected to an input terminal of the second precision relay 8.
In specific use, the zero line N (A) and the live line L (B) at the load end pass through a closed magnetic flux 1 according to an induced electromotive force phenomenon, the generated electromotive forces are mutually counteracted when the load current returns to the zero line, if the output of the live line L is not equal to the return circuit of the zero line N, the electromotive forces are generated, and a potential coil 9 wound on the magnetic flux generates a potential output to drive the first precision relay 6 to control the electromagnet 2 to perform action open circuit protection.
To sum up, the utility model discloses a current potential formula earth leakage protection system, simple structure has effectively solved ground wire ground connection harmfully, and the potential safety hazard under the inefficacy need not complicated circuit element and IC etc. low in manufacturing cost, and trigger action signal reliability, interference ratio are high than other modes, let the more green safety of power consumption environment.
The above description has been made of specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (3)
1. A potential type leakage protection system is characterized in that: the power supply comprises a zero line, a live line, a closed magnetic flux, an electromagnet and a circuit breaker, wherein the first ends of the zero line and the live line are connected with a switch load end, the second ends of the zero line and the live line are respectively connected with a unidirectional conductive tube and then connected with a precision resistor from the output end of the unidirectional conductive tube, the precision resistor ends respectively connected with the zero line and the live line are connected with the input end of a first precision relay, the output end of the first precision relay is connected with a current-limiting resistor, and the tail end of the current-limiting resistor is connected with a ground wire, an electric appliance metal; the second ends of the live wire and the zero wire penetrate through the closed magnetic flux and then are connected with the circuit breaker, the closed magnetic flux is connected to the input end of the second precision relay, the output end of the second precision relay is connected with the first end of the electromagnet, the second end of the electromagnet is connected with the circuit breaker, and the output end of the first precision relay is connected with the output end of the second precision relay.
2. A potentiometric leakage protection system according to claim 1, wherein: the unidirectional conductive tube is a diode.
3. A potentiometric leakage protection system according to claim 1, wherein: and a potential coil is arranged on the closed magnetic flux and connected to the input end of the second precision relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920692606.4U CN210111591U (en) | 2019-05-15 | 2019-05-15 | Potential type leakage protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920692606.4U CN210111591U (en) | 2019-05-15 | 2019-05-15 | Potential type leakage protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210111591U true CN210111591U (en) | 2020-02-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920692606.4U Expired - Fee Related CN210111591U (en) | 2019-05-15 | 2019-05-15 | Potential type leakage protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210111591U (en) |
-
2019
- 2019-05-15 CN CN201920692606.4U patent/CN210111591U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |