CN219351268U - Leakage protector circuit capable of realizing bidirectional wiring - Google Patents

Abstract

The utility model relates to a leakage protector circuit capable of realizing bidirectional wiring, which comprises a leakage sampling module, a voltage conversion module, a control logic module, an integrated chip U1, a surge protection module, a tripping module and a power supply module. The leakage protector circuit capable of realizing bidirectional wiring controls the level of the controllable silicon control stage by using a circuit signal feedback method, realizes the bidirectional wiring protection function, ensures that when a customer is wired on any side, the leakage protector can not cause the burning of a release or controllable silicon when the leakage is generated and always exists, and can normally play a role in protecting when the leakage is generated again after the leakage signal disappears, so that the utility model solves the product faults caused by the misconnection or the mechanical clamping problem of the traditional bidirectional wiring leakage protector, and greatly improves the safety and reliability of the traditional single-phase wiring leakage protector.

Description

Leakage protector circuit capable of realizing bidirectional wiring

Technical Field

The utility model relates to the technical field of leakage protection, in particular to a leakage protector circuit capable of realizing bidirectional wiring.

Background

The traditional leakage protector adopts the incoming line end to input commercial power, and the outgoing line end is for leakage control circuit and load power supply, and in case the load end takes place the electric leakage, circuit drive release makes the circuit breaker disconnection, cuts off leakage control panel and load end power supply to play the protection effect. However, in the implementation process of the traditional leakage protector, misoperation is caused to lead in/out reverse connection, once leakage occurs, the leakage control board keeps normal power supply, meanwhile, a leakage signal is output to enable the controllable silicon to be conducted, and at the moment, the release generates excessive current through the controllable silicon, so that the release or the controllable silicon is invalid, and a product fails. The existing leakage protector adopts a mechanical switch connected in series on a circuit of an input live wire of a leakage control board, and the mechanical switch is disconnected when the circuit generates leakage to drive a release, thereby playing a role in protection. However, the mechanical switch may generate electric arc to cause fire disaster in the switching process, or the release or the controllable silicon is burnt out due to the problem of the mechanical switch clamping, so the mechanical switch has the defects of low safety and low reliability.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide a leakage protector circuit capable of bidirectional wiring with high safety and high reliability.

In order to achieve the above purpose, the utility model adopts the leakage protector circuit capable of realizing bidirectional wiring, which comprises a leakage sampling module, a voltage conversion module, a control logic module, an integrated chip U1, a surge protection module, a tripping module and a power module, wherein the output end of the leakage sampling module is connected with the input end of the integrated chip U1, the output end of the integrated chip U1 is connected with the input end of the control logic module, the output end of the control logic module is connected with the input end of the tripping module, the output end of the power module is connected with the input end of the surge protection module, the output end of the surge protection module is respectively connected with the input end of the tripping module, the input end of the voltage conversion module and the input end of the control logic module, and the output end of the voltage conversion module is connected with the input end of the integrated chip U1.

The utility model discloses further set up to control logic module and include silicon controlled rectifier SCR1, electronic switch Q1, the collecting electrode of electronic switch Q1, integrated chip U1, electronic switch Q1's base are connected respectively to silicon controlled rectifier SCR 1's control electrode, electronic switch Q1's projecting pole, silicon controlled rectifier SCR 1's negative pole all ground connection, surge protection module, tripping module, voltage conversion module are connected respectively to silicon controlled rectifier SCR 1's positive pole.

The utility model discloses further set up to electric leakage sampling module and include electric leakage coil Z1, electric leakage coil Z2, electric leakage sampling circuit is connected respectively to electric leakage coil Z1, electric leakage coil Z2, electric leakage sampling circuit connects integrated chip U1.

The utility model discloses further set up to the tripping module and include tripping coil M1, tripping coil M2, the surge protection module is connected to tripping coil M1, control logic module, surge protection module, voltage conversion module are connected respectively to tripping coil M2.

The utility model discloses further set up to power module and include zero line N, live wire L, ground wire PE, surge protection module is connected respectively to zero line N, live wire L, ground wire PE.

The utility model has the beneficial effects that: the control level of the controllable silicon is controlled by adopting the method of circuit signal feedback by using the module, so that the bidirectional wiring protection function is realized, when a customer is wired on any side, when electric leakage occurs and the current exists all the time, the release or the controllable silicon cannot be burnt out, and when the electric leakage occurs again after the electric leakage signal disappears, the protection function can be normally played, so that compared with the traditional single-phase wiring leakage protector, the safety and the reliability of the single-phase wiring leakage protector are greatly improved due to the product failure caused by the erroneous connection or the mechanical clamping problem of the traditional bidirectional wiring leakage protector.

Drawings

Fig. 1 is a schematic circuit diagram of an embodiment of the present utility model.

Detailed Description

As shown in fig. 1, a specific embodiment of the present utility model is a leakage protector circuit capable of bidirectional connection, which includes a leakage sampling module 1, a voltage conversion module 2, a control logic module 3, an integrated chip U1, a surge protection module 4, a trip module 5, and a power module 6, wherein an output end of the leakage sampling module 1 is connected to an input end of the integrated chip U1, an output end of the integrated chip U1 is connected to an input end of the control logic module 3, an output end of the control logic module 3 is connected to an input end of the trip module 5, an output end of the power module 6 is connected to an input end of the surge protection module 4, an output end of the surge protection module 4 is respectively connected to an input end of the trip module 5, an input end of the voltage conversion module 2, and an input end of the control logic module 3, an output end of the voltage conversion module 2 is connected to an input end of the integrated chip U1, and a model of the integrated chip U1 may be LW301, LW54123, or FM2147.

The control logic module 3 comprises resistors R5-R7, capacitors C5-C7, a capacitor C9, an electronic switch Q1 and a silicon controlled rectifier SCR1, wherein a control electrode of the silicon controlled rectifier SCR1 is respectively connected with one end of the capacitor C5, a collector electrode of the electronic switch Q1 and one end of the resistor R5, the other end of the resistor R5 is respectively connected with a fifth pin end of the integrated chip U1 and one end of the resistor R7, one end of the resistor R6 and one end of the capacitor C9 are respectively connected with a base electrode of the electronic switch Q1, one end of the capacitor C6 is connected with a sixth pin end of the integrated chip U1, one end of the capacitor C7 is connected with a seventh pin end of the integrated chip U1, a cathode of the silicon controlled rectifier SCR1, the other end of the capacitor C5, an emitter electrode of the electronic switch Q1, the other end of the capacitor C9, the other end of the resistor R6, the other end of the capacitor C7, the other end of the capacitor C6, the first pin end of the integrated chip U1 and a fourth pin end of the integrated chip U1 are all grounded, and an anode of the silicon controlled rectifier SCR1 is respectively connected with one end of a tripping resistor M2 of a voltage-tripping module 4 of a surge protection module RV4, and one end of a tripping voltage-tripping module 2 of the voltage-tripping module 4.

The leakage sampling module 1 comprises a leakage sampling circuit, a leakage coil Z1 and a leakage coil Z2, wherein the leakage sampling circuit comprises resistors R10, resistors R2-R3, capacitors C1-C4 and a bidirectional diode DD1, the output end of the leakage coil Z1 is respectively connected with one end of the resistor R10, one end of the bidirectional diode DD1, one end of the capacitor C1 and one end of the resistor R2, the output end of the leakage coil Z2 is respectively connected with the other end of the resistor R10, the other end of the bidirectional diode DD1, the other end of the capacitor C1 and the other end of the resistor R2, the other end of the resistor R2 is respectively connected with one end of the capacitor C4, one end of the capacitor C2 and a second pin end of the integrated chip U1, the other end of the resistor R3 is respectively connected with one end of the capacitor C3, the other end of the capacitor C2 and a third pin end of the integrated chip U1, and the other end of the capacitor C4 is respectively connected with a first pin end of the integrated chip U1.

The voltage conversion module 2 comprises a resistor R1, a resistor R4, a resistor R8, a resistor R9, a capacitor C8 and a zener diode ZD1, wherein one end of the resistor R1 is connected with one end of the resistor R4, the other end of the resistor R1 is respectively connected with the other end of the resistor R4, one end of the resistor R9 and one end of the resistor R8, the other end of the resistor R9, the other end of the resistor R8, the negative electrode of the zener diode ZD1 and the eighth pin end of the integrated chip U1 are respectively connected with one end of the capacitor C8, and the positive electrode of the zener diode ZD1 and the other end of the capacitor C8 are grounded.

The surge protection module 4 comprises a port S1 and a surge protection circuit, the surge protection circuit comprises piezoresistors RV 1-RV 4, a resistor RS1 and diodes D1-D3, one end of the piezoresistor RV2 is respectively connected with one end of the resistor RS1 and the anode of the diode D2, the other end of the resistor RS1 is connected with the port S1, the cathode of the diode D2 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with one end of the piezoresistor RV3, the other end of the piezoresistor RV3 and the other end of the piezoresistor RV2 are both connected with one end of the piezoresistor RV1, the other end of the piezoresistor RV1 is connected with the cathode of the diode D1, and the anode of the diode D1 is connected with the other end of the piezoresistor RV 4.

The tripping module 5 comprises a tripping coil M1 and a tripping coil M2, wherein the tripping coil M1 is connected with the cathode of a diode D3 of the surge protection module 4, and the tripping coil M2 is respectively connected with the anode of a silicon controlled rectifier SCR1 of the control logic module 3, one end of a piezoresistor RV4 of the surge protection module 4 and one end of a resistor R4 of the voltage conversion module 2.

The power module 6 comprises a zero line N, a fire wire L and a ground wire PE, wherein the zero line N is connected with the anode of the diode D2 connected with the surge protection module 4, the fire wire L is connected with the cathode of the diode D1 of the surge protection module 4, and the ground wire PE is connected with the anode of the diode D3 of the surge protection module 4.

The leakage sampling module 1 is adopted to convert the leakage signal into a corresponding voltage signal when the leakage signal is generated, the integrated chip U1, the control logic module 3 and the tripping module 5 are adopted to transmit the leakage voltage signal to the integrated chip U1, when the leakage value exceeds the tripping set value, the fifth pin of the integrated chip U1 outputs a tripping level signal, the tripping signal is connected with the control electrode of the silicon controlled rectifier SCR1 through the resistor R5 to lead the silicon controlled rectifier SCR1 to be conducted so as to realize tripping, meanwhile, the capacitor C5 is utilized to filter so as to prevent the interference signal from generating misoperation on the silicon controlled rectifier SCR1, the two-way wiring of the circuit is realized, the switching off is realized after the silicon controlled rectifier SCR1 is conducted, the voltage of the control level of the silicon controlled rectifier SCR1 is changed under the condition that the tripping signal keeps continuously outputting, thus the RC charging circuit is formed by using R7 and C9, the on time of the electronic switch Q1 is enabled to be later than the on time of the silicon controlled rectifier SCR1, once the electronic switch Q1 is conducted, the control level of the silicon controlled rectifier SCR1 is pulled down by the electronic switch Q1, the silicon controlled rectifier SCR1 is turned off, so that no large current flows through the silicon controlled rectifier SCR1, the effect of protecting the silicon controlled rectifier SCR1 and the tripping device is achieved, when the leakage signal disappears, the tripping signal of the fifth pin of the integrated chip U1 disappears, the low level is output, the electronic switch Q1 turns off the silicon controlled rectifier SCR1 to be non-conducting, the next leakage is waited to occur, and the voltage conversion module 2 enables the integrated chip U1 to work in a stable voltage range.

In addition to the above embodiments, the present utility model may be further modified and varied in various ways, and the modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims (6)

1. A bi-directional wiring leakage protector circuit, characterized by: the power supply device comprises a leakage sampling module, a voltage conversion module, a control logic module, an integrated chip U1, a surge protection module, a tripping module and a power module, wherein the output end of the leakage sampling module is connected with the input end of the integrated chip U1, the output end of the integrated chip U1 is connected with the input end of the control logic module, the output end of the control logic module is connected with the input end of the tripping module, the output end of the power module is connected with the input end of the surge protection module, and the output end of the surge protection module is respectively connected with the input end of the tripping module, the input end of the voltage conversion module and the input end of the control logic module, and the output end of the voltage conversion module is connected with the input end of the integrated chip U1.

2. The bi-directional wiring leakage protector circuit of claim 1, wherein: the control logic module comprises a silicon controlled rectifier SCR1 and an electronic switch Q1, wherein a control electrode of the silicon controlled rectifier SCR1 is respectively connected with a collector electrode of the electronic switch Q1, an integrated chip U1 and a base electrode of the electronic switch Q1, an emitting electrode of the electronic switch Q1 and a cathode of the silicon controlled rectifier SCR1 are grounded, and an anode of the silicon controlled rectifier SCR1 is respectively connected with a surge protection module, a tripping module and a voltage conversion module.

3. The bi-directional wiring leakage protector circuit of claim 1, wherein: the leakage sampling module comprises a leakage coil Z1, a leakage coil Z2 and a leakage sampling circuit, wherein the leakage coil Z1 and the leakage coil Z2 are respectively connected with the leakage sampling circuit, and the leakage sampling circuit is connected with an integrated chip U1.

4. The bi-directional wiring leakage protector circuit of claim 1, wherein: the tripping module comprises a tripping coil M1 and a tripping coil M2, wherein the tripping coil M1 is connected with the surge protection module, and the tripping coil M2 is respectively connected with the control logic module, the surge protection module and the voltage conversion module.

5. The bi-directional wiring leakage protector circuit of claim 1, wherein: the power module comprises a zero line N, a fire line L and a ground line PE, and the zero line N, the fire line L and the ground line PE are respectively connected with the surge protection module.

6. A bi-directionally wired earth leakage protector circuit as claimed in claim 1 or 2 or 3 or 4 or 5, and further comprising: the model of the integrated chip U1 can be LW301 or LW54123 or FM2147.

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