CN218633314U - Leakage relay protection circuit - Google Patents
Leakage relay protection circuit Download PDFInfo
- Publication number
- CN218633314U CN218633314U CN202222990618.XU CN202222990618U CN218633314U CN 218633314 U CN218633314 U CN 218633314U CN 202222990618 U CN202222990618 U CN 202222990618U CN 218633314 U CN218633314 U CN 218633314U
- Authority
- CN
- China
- Prior art keywords
- resistor
- protection circuit
- relay protection
- capacitor
- leakage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model belongs to the technical field of the earth leakage protection technique and specifically relates to an electric leakage relay protection circuit, including leakage detection circuit, relay protection circuit and relay switch, the mutual-inductor is connected to leakage detection circuit input, and relay protection circuit input is connected to the output electricity, relay switch is connected to relay protection circuit output, relay switch connects. The utility model provides a pair of electric leakage relay protection circuit through mutual-inductor inductive circuit whether there is the electric leakage condition, through relay protection circuit control connection relay switch on the power, according to adjusting the resistance value, to detecting the circuit that has the electric leakage condition and need correct, through disconnection switch protection circuit, realizes the leakage detection and timely relay protection to the circuit, avoids causing bigger loss.
Description
Technical Field
The utility model belongs to the technical field of the earth leakage protection technique and specifically relates to an electric leakage relay protection circuit.
Background
Since the electrical equipment is likely to cause a leakage failure after the insulation performance thereof is lowered, it is necessary to protect the electrical equipment from leakage. Most applications of electronic systems require higher working environment temperature, and the typical working temperature of the industrial grade of vehicles is higher, so that the high-voltage and high-current system brings the challenge of high power consumption and high temperature to power devices in a chip, and control protection such as traditional overcurrent, overvoltage and overheating protection is necessary. However, the leakage of the power device is aggravated due to the high temperature, and the breakdown voltage of the device is weakened due to the increase of the leakage, so that the device is easily burnt, and therefore, the leakage degree of the device needs to be detected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a leakage relay protection circuit to solve the defect that proposes in the above-mentioned background art.
The utility model adopts the technical scheme as follows:
the utility model provides a leakage relay protection circuit, includes electric leakage detection circuit, relay protection circuit and relay switch, the mutual-inductor is connected to electric leakage detection circuit input, and relay protection circuit input is connected to the output electricity, relay switch is connected to relay protection circuit output, relay switch connects.
As an optimal technical solution of the utility model: the leakage detection circuit comprises a first resistor and a second resistor, wherein a first end of the first resistor and a first end of the second resistor are respectively connected with a mutual inductor, and a second end of the first resistor and a second end of the second resistor are both grounded.
As an optimal technical solution of the utility model: the leakage detection circuit further comprises a filter module consisting of a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a third resistor and a fourth resistor, wherein a mutual inductor is connected with the first end of the first capacitor and the first end of the third resistor, the second capacitor is connected with the second end of the third resistor, the mutual inductor is connected with the first end of the third capacitor and the first end of the fourth resistor, the fourth resistor is connected with the first end of the fourth capacitor, and the second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor and the second end of the fourth capacitor are all grounded.
As an optimal technical solution of the utility model: the leakage detection circuit further comprises a photoelectric coupler, the first end and the second end of the photoelectric coupler are respectively connected with the second end of the third resistor and the second end of the fourth resistor, the third end of the photoelectric coupler is connected with a first power supply, and the fourth end of the photoelectric coupler is connected with the relay protection circuit.
As an optimal technical solution of the utility model: the relay protection circuit comprises a fifth resistor, a sixth resistor and a fifth capacitor, wherein the first end of the fifth resistor is connected with the fourth end of the photoelectric coupler, the second end of the fifth resistor is grounded, the sixth resistor is connected with the fifth capacitor in parallel, and the first end of the parallel circuit is connected with the fourth end of the photoelectric coupler.
As an optimal technical solution of the utility model: the relay protection circuit further comprises a triode, the base electrode of the triode is connected with the second end of the parallel circuit, and the emitting electrode of the triode is grounded.
As a preferred technical solution of the utility model: the triode is of NPN type.
As an optimal technical solution of the utility model: the relay protection circuit further comprises a seventh resistor, wherein the first end of the seventh resistor is connected with the collector of the triode, and the second end of the seventh resistor is connected with the second power supply.
As a preferred technical solution of the utility model: the first end of the relay switch is connected with a second power supply, the second end of the relay switch is connected with the collector of the triode, and the third end and the fourth end of the relay switch are connected with the power supply.
The utility model provides a pair of leakage relay protection circuit compares with prior art, and its beneficial effect has:
the utility model provides a pair of electric leakage relay protection circuit through mutual-inductor inductive circuit whether there is the electric leakage condition, through relay protection circuit control connection relay switch on the power, according to adjusting the resistance value, to detecting the circuit that has the electric leakage condition and need correct, through disconnection switch protection circuit, realizes the leakage detection and timely relay protection to the circuit, avoids causing bigger loss.
Drawings
Fig. 1 is a leakage relay protection circuit diagram of the preferred embodiment of the present invention.
Detailed Description
It should be noted that, in the present embodiment, features of the embodiment and the embodiment can be combined with each other without conflict, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to fig. 1, the preferred embodiment of the utility model provides a leakage relay protection circuit, including leakage detection circuit, relay protection circuit and relay switch, the mutual-inductor is connected to leakage detection circuit input, and relay protection circuit input is connected to the output electricity, relay switch is connected to relay protection circuit output, relay switch connects.
The leakage detection circuit comprises a first resistor and a second resistor, wherein a first end of the first resistor and a first end of the second resistor are respectively connected with a mutual inductor, and a second end of the first resistor and a second end of the second resistor are both grounded.
The leakage detection circuit further comprises a filter module consisting of a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a third resistor and a fourth resistor, wherein a mutual inductor is connected with the first end of the first capacitor and the first end of the third resistor, the second capacitor is connected with the second end of the third resistor, the mutual inductor is connected with the first end of the third capacitor and the first end of the fourth resistor, the fourth resistor is connected with the first end of the fourth capacitor, and the second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor and the second end of the fourth capacitor are all grounded.
The leakage detection circuit further comprises a photoelectric coupler, the first end and the second end of the photoelectric coupler are respectively connected with the second end of the third resistor and the second end of the fourth resistor, the third end of the photoelectric coupler is connected with a first power supply, and the fourth end of the photoelectric coupler is connected with the relay protection circuit.
The relay protection circuit comprises a fifth resistor, a sixth resistor and a fifth capacitor, wherein the first end of the fifth resistor is connected with the fourth end of the photoelectric coupler, the second end of the fifth resistor is grounded, the sixth resistor is connected with the fifth capacitor in parallel, and the first end of the parallel circuit is connected with the fourth end of the photoelectric coupler.
The relay protection circuit further comprises a triode, the base electrode of the triode is connected with the second end of the parallel circuit, and the emitting electrode of the triode is grounded.
The triode is of an NPN type.
The relay protection circuit further comprises a seventh resistor, wherein the first end of the seventh resistor is connected with the collector of the triode, and the second end of the seventh resistor is connected with the second power supply.
The first end of the relay switch is connected with a second power supply, the second end of the relay switch is connected with the collector of the triode, and the third end and the fourth end of the relay switch are connected with the power supply.
In this embodiment, the leakage detection circuit includes R1, R2, R3, R4, C1, C2, C3, C4, and a photocoupler. R1 and R2 are respectively connected with a mutual inductor, the other ends of R1 and R2 are grounded, C1 and C2 are respectively connected with a mutual inductor, the other ends of C1 and C2 are grounded, R3 and R4 are respectively connected with a mutual inductor, the other ends of R3 and R4 are respectively connected with C3 and C4, and the other ends of C3 and C4 are grounded. The first end of the photoelectric coupler is connected with the other end of the R3, the second end of the photoelectric coupler is connected with the other end of the R4, the third end of the photoelectric coupler is connected with a first power supply V1, and the fourth end of the photoelectric coupler is connected with R5, R6 and C5. C1, R3, C2 and C3, R4, C4 constitute filter circuit, stabilize the induced voltage of mutual-inductor output, input to the photoelectric coupler.
The leakage detection circuit senses leakage voltage through the mutual inductor and inputs the leakage voltage to the photoelectric coupler through the filter circuit, and the voltage stably input by the photoelectric coupler is transmitted to the relay protection circuit.
The relay protection circuit comprises R5, R6, R7, C5 and a triode T. The other end of the R5 is grounded, the R5 protects the normal work of the relay protection circuit, and the relay protection range is controlled by adjusting the resistance values of the R5 and the R6. The other ends of the C5 and the R6 are connected with a triode T together, and the C5 and the R6 form a filter circuit together. The triode T collector is connected with R7 and the first end of the relay switch, the emitter is grounded, the other end of R7 and the second end of the relay switch are connected with a second power supply V2, and the third end and the fourth end of the relay switch are connected with the power supply.
The relay protection circuit controls a relay switch according to the circuit leakage condition detected by the leakage detection circuit, and controls the mutual inductor and the connection of the mutual inductor through the relay switch. When the mutual inductor detects that electric leakage exists, a large voltage can be generated, the electric leakage detection circuit is activated to output the voltage to the relay protection circuit, and when the electric leakage current is large, the triode of the relay protection circuit is conducted to control the relay switch to turn off the power supply.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (9)
1. The utility model provides a leakage relay protection circuit, includes electric leakage detection circuit, relay protection circuit and relay switch, its characterized in that: the input end of the electric leakage detection circuit is connected with the mutual inductor, the output end of the electric leakage detection circuit is electrically connected with the input end of the relay protection circuit, the output end of the relay protection circuit is connected with the relay switch, and the relay switch is connected with the power supply.
2. A leakage relay protection circuit according to claim 1, characterized in that: the leakage detection circuit comprises a first resistor and a second resistor, wherein a first end of the first resistor and a first end of the second resistor are respectively connected with a mutual inductor, and a second end of the first resistor and a second end of the second resistor are both grounded.
3. A leakage relay protection circuit according to claim 1, characterized in that: the leakage detection circuit further comprises a filtering module consisting of a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a third resistor and a fourth resistor, wherein the first end of the first capacitor and the first end of the third resistor are connected with a mutual inductor, the second end of the third resistor is connected with the second capacitor, the first end of the third capacitor and the first end of the fourth resistor are connected with the mutual inductor, the second end of the fourth resistor is connected with the first end of the fourth capacitor, and the second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor and the second end of the fourth capacitor are all grounded.
4. A leakage relay protection circuit according to claim 1, characterized in that: the leakage detection circuit further comprises a photoelectric coupler, the first end and the second end of the photoelectric coupler are respectively connected with the second end of the third resistor and the second end of the fourth resistor, the third end of the photoelectric coupler is connected with a first power supply, and the fourth end of the photoelectric coupler is connected with the relay protection circuit.
5. A leakage relay protection circuit according to claim 4, characterized in that: the relay protection circuit comprises a fifth resistor, a sixth resistor and a fifth capacitor, wherein the first end of the fifth resistor is connected with the fourth end of the photoelectric coupler, the second end of the fifth resistor is grounded, the sixth resistor is connected with the fifth capacitor in parallel, and the first end of the parallel circuit is connected with the fourth end of the photoelectric coupler.
6. A leakage relay protection circuit according to claim 5, characterized in that: the relay protection circuit further comprises a triode, the base electrode of the triode is connected with the second end of the parallel circuit, and the emitting electrode of the triode is grounded.
7. A leakage relay protection circuit according to claim 6, wherein: the triode is of NPN type.
8. A leakage relay protection circuit according to claim 6, wherein: the relay protection circuit further comprises a seventh resistor, wherein the first end of the seventh resistor is connected with the collector of the triode, and the second end of the seventh resistor is connected with the second power supply.
9. A leakage relay protection circuit according to claim 1, characterized in that: the first end of the relay switch is connected with a second power supply, the second end of the relay switch is connected with the collector of the triode, and the third end and the fourth end of the relay switch are connected with the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222990618.XU CN218633314U (en) | 2022-11-08 | 2022-11-08 | Leakage relay protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222990618.XU CN218633314U (en) | 2022-11-08 | 2022-11-08 | Leakage relay protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218633314U true CN218633314U (en) | 2023-03-14 |
Family
ID=85424360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222990618.XU Active CN218633314U (en) | 2022-11-08 | 2022-11-08 | Leakage relay protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218633314U (en) |
-
2022
- 2022-11-08 CN CN202222990618.XU patent/CN218633314U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201405807Y (en) | Power supply circuit for whole vehicle controller of hybrid power bus | |
| CN202094430U (en) | Intelligent and anti-electric shock safety socket | |
| CN207612045U (en) | A kind of protection chip | |
| CN208589916U (en) | It is a kind of with overvoltage protection and it is anti-sparking function dc power interface circuit | |
| CN209626947U (en) | A kind of overvoltage crowbar of car networking system | |
| CN110416975A (en) | A kind of power protecting circuit and new-energy automobile | |
| CN218633314U (en) | Leakage relay protection circuit | |
| CN202564933U (en) | Power supply device | |
| CN109494702A (en) | A kind of capacitance protection circuit and power protecting circuit | |
| CN203691219U (en) | Isolating power drive circuit | |
| CN104080221B (en) | A kind of LED drive circuit and LED light | |
| CN203491680U (en) | Automatic reset electric leakage overvoltage/undervoltage protection circuit | |
| CN208623331U (en) | A kind of Vehicular intercom protection circuit | |
| CN202421457U (en) | Motor over-current detection circuit | |
| CN214754507U (en) | Circuit with timing function and leakage protection plug | |
| CN105762779A (en) | Circuit protection apparatus | |
| CN206481243U (en) | A kind of switch reluctance machine drive silicon controlled control circuit | |
| CN104113038A (en) | Protection circuit | |
| CN103683215A (en) | Short-circuit protection circuit of electronic switch | |
| CN110786079B (en) | Lamp tube, protection circuit and protection device applied to lamp tube | |
| CN204030577U (en) | A kind of surge impact protection circuit for direct current machine and air conditioner | |
| CN208522449U (en) | Over-temperature protection device | |
| CN105305397A (en) | Overvoltage protection circuit and electronic equipment | |
| CN205283123U (en) | A exchange lightning protection module for photovoltaic equipment | |
| CN214850976U (en) | Automobile power supply voltage reduction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |