CN212304721U

CN212304721U - Circuit for fault monitoring, alarming and tripping of leakage protector

Info

Publication number: CN212304721U
Application number: CN202021376333.1U
Authority: CN
Inventors: 王娜
Original assignee: Zhejiang Gaoshang Electric Technology Co ltd
Current assignee: Zhejiang Gaoshang Electric Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-01-05
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses a circuit for earth-leakage protector fault monitoring reports to police and dropout, including power input end, load end, power supply circuit, trip circuit, automatic monitoring circuit, earth-leakage protection circuit, power supply circuit include rectifier bridge D6, diode D5, piezo-resistor MOV2, the power from power input end input back provide independent power for trip circuit and automatic monitoring circuit behind the power supply circuit, trip circuit includes trip coil L, one-way silicon controlled rectifier SCR, electric capacity C10, diode D9, automatic monitoring circuit is by including simulation earth-leakage circuit, delay circuit, by electric leakage detection circuitry, pilot lamp LED2 that automatic monitoring chip IC2 and peripheral circuit constitute. A circuit for earth-leakage protector fault monitoring reports to police and dropout can carry out leakage monitoring to the circuit, trip coil L action when taking place the electric leakage, earth-leakage protector dropout uses safe and reliable.

Description

Circuit for fault monitoring, alarming and tripping of leakage protector

Technical Field

The utility model relates to a circuit, specifically speaking are a circuit that is used for earth-leakage protector fault monitoring to report to the police and thread off.

Background

The power consumption device need be inserted and is switched on the power and use, is not equipped with the device that is used for earth leakage protection between current power consumption device and the power, if the power consumption device appears the electric leakage because reasons such as ageing in the use, then brings bodily injury, has the danger of electrocuteeing easily for the user.

SUMMERY OF THE UTILITY MODEL

The utility model provides a circuit that is used for earth-leakage protector fault monitoring to report to police and thread off.

The utility model aims at solving the problem that the current power consumption device brings personal injury easily for the user because the electric leakage appears in reasons such as ageing in the use.

The utility model provides a technical scheme that its technical problem adopted is: a circuit for fault monitoring alarm and tripping of a leakage protector comprises a power input end, a load end, a power circuit, a tripping circuit, an automatic monitoring circuit and a leakage protection circuit, wherein the power circuit comprises a rectifier bridge D6, a diode D5 and a piezoresistor MOV2, the power input end supplies independent power to the tripping circuit and the automatic monitoring circuit after being input by the power circuit, the tripping circuit comprises a tripping coil L, a one-way Silicon Controlled Rectifier (SCR), a capacitor C10 and a diode D9, the automatic monitoring circuit comprises a simulation leakage circuit, a delay circuit, a leakage detection circuit consisting of an automatic monitoring chip IC2 and peripheral circuits thereof, and an indicator light LED2, the simulation leakage circuit comprises a switching tube Q1 and a resistor R12, the delay circuit comprises a resistor R7 and a capacitor C8, the simulation leakage circuit can simulate a leakage signal, and the leakage detection circuit monitors and detects the leakage signal, when the leakage protector fails, the leakage protection circuit does not work, an indicator light LED2 in the automatic monitoring circuit lights up, the automatic monitoring circuit triggers the tripping circuit to act, the one-way silicon controlled rectifier SCR is conducted, the tripping coil L acts, and the leakage protector trips;

in a power-on state, 3 and 6 pins of an automatic monitoring chip IC2 are divided by resistors R11 and R17 to obtain a reference voltage, and simultaneously, a capacitor C12 is charged through a resistor R13, when the voltage on a capacitor C12 exceeds the reference voltage of 3 and 6 pins of the automatic monitoring chip IC2, a 7 pin of the automatic monitoring chip IC2 outputs a level signal to enable a light-emitting diode LED2 to light up and trigger a switching tube Q1 to be conducted, a simulated leakage circuit formed by the resistor R12 is started, a leakage protection circuit acts, a one-way silicon controlled rectifier SCR is conducted, the cathode of a diode D5 is at a low potential, a diode D7 is conducted to enable the capacitor C12 to discharge, no output is generated at the 7 pin of a low potential IC2 of a pin 5 of the automatic monitoring chip IC2, the light-emitting diode LED2 is extinguished, the switching tube Q1 is cut off, the simulated leakage is stopped, the one-way silicon controlled SCR is cut off, the cathode of; the capacitor C12 will start the next monitoring cycle after charging; when the leakage protector is in fault, the leakage protection circuit does not work, the one-way Silicon Controlled Rectifier (SCR) is cut off, the high potential of the cathodes of the diodes D5 and D7, the high potential of the pin 5 of the automatic monitoring chip IC2, the level output of the pin 7 of the automatic monitoring chip IC2, the light-emitting diode LED2 is lightened, the voltage output of the pin 7 of the automatic monitoring chip IC2 is delayed by a delay circuit consisting of a resistor R7 and a capacitor C8, the trigger switch tube Q2 is switched on, the one-way Silicon Controlled Rectifier (SCR) is forcibly triggered to be switched on after the switch tube Q2 is switched on, the tripping coil L acts, and the leakage.

Preferably, the power input end comprises a zero line input end and a live line input end.

The utility model has the advantages that: a circuit for earth-leakage protector fault monitoring reports to police and dropout can carry out leakage monitoring to the circuit, trip coil L action when taking place the electric leakage, earth-leakage protector dropout uses safe and reliable.

Drawings

Fig. 1 is a schematic diagram of a circuit structure for fault monitoring, alarming and tripping of the leakage protector.

Detailed Description

The invention will be further described with reference to the following figures and examples:

as shown in the figure, the embodiment of the circuit for monitoring the fault, alarming and tripping of the leakage protector of the present invention is provided, which comprises a power input terminal 1, a load terminal 2, a power circuit 3, a trip circuit, an automatic monitoring circuit 4, and a leakage protection circuit, wherein the power circuit comprises a rectifier bridge D6, a diode D5, and a voltage dependent resistor MOV2, the power input from the power input terminal provides an independent power supply to the trip circuit and the automatic monitoring circuit after passing through the power circuit, the trip circuit comprises a trip coil L, a one-way thyristor SCR, a capacitor C10, and a diode D9, the automatic monitoring circuit comprises a simulation leakage circuit, a delay circuit, a leakage detection circuit composed of an automatic monitoring chip IC2 and its peripheral circuit, and an indicator light LED2, the simulation leakage circuit comprises a switch tube Q1 and a resistor R12, the delay circuit comprises a resistor R7 and a capacitor C8, the simulation leakage circuit can simulate leakage signals, the leakage detection circuit monitors and detects the leakage signals, when the leakage protector breaks down, the leakage protection circuit does not work, an indicator light LED2 in the automatic monitoring circuit lights, the automatic monitoring circuit triggers a tripping circuit to act, the one-way silicon controlled rectifier SCR is switched on, a tripping coil L acts, and the leakage protector trips.

The power input end comprises a zero line input end and a live wire input end.

The working principle is as follows: in a power-on state, pins 3 and 6 of an automatic monitoring chip IC2 are divided by R11 and R17 to obtain a reference voltage, C12 is charged through R13, when the voltage on C12 (which is connected with pin 5 of IC 2) exceeds the reference voltage of pins 3 and 6 of IC2, pin 7 of IC2 outputs a level signal to enable LED2 to light up and trigger Q1 to be conducted, a simulated leakage circuit formed by R12 is started, a leakage protection circuit acts, a one-way thyristor SCR is conducted, the cathode of D5 is at a low potential, D7 is conducted, C12 is discharged, pin 7 of IC2 of pin 5 of IC2 is at a low potential, LED2 is extinguished, Q1 is cut off, the simulated leakage is stopped, the one-way thyristor SCR is cut off, the cathode of D5 is at a high potential, and a cycle is ended. C12 will initiate the next monitoring cycle after charging. Because rectifier diodes D3 and D5 are applied to the circuit to carry out half-wave rectification, the tripping circuit and the automatic monitoring circuit work in a half-wave state, and the error tripping of the leakage protector cannot be caused. When the leakage protector is in fault, the leakage protection circuit does not work, the one-way Silicon Controlled Rectifier (SCR) is cut off, the negative electrode high potential of D5 and D7, the pin 5 high potential of IC2, the pin 7 of IC2 has level output, the light-emitting diode (LED) 2 lights (a tripping coil L and the one-way Silicon Controlled Rectifier (SCR) are in open circuit, and the light-emitting diode (LED) 2 lights normally), the pin 7 output voltage of IC2, a delay circuit (about 1 second delay) formed by R7 and C8 triggers the Q2 to be conducted, the one-way silicon controlled rectifier is forcibly triggered to be conducted after the Q2 is conducted, the tripping coil L acts, and the leakage protector is tripped. The application of D9 isolates the leakage protection trigger signal and the forced tripping trigger signal after the fault is detected, so that the tripping circuit and the automatic monitoring circuit are relatively independent and do not influence each other.

The circuit is started within 1 second after the power is switched on. After D5 half-wave rectification, the R14 inputs signals to the 2 pin of IC2, C11 is charged, when C11 is charged, the 2 pin of IC2 is at low level, at the same time, the 1 pin output of IC2 quickly charges C12 through D8, when the voltage on C12 exceeds the reference voltage of the 3 and 6 pins of IC2, the IC7 pin outputs level signals to light up the LED2, when the LED2 lights up, the fully charged C11 makes the 2 pin of IC2 at high level, the 1 pin of IC2 has no output, the power-on of the circuit is self-started, and automatic cycle monitoring is entered.

Claims

1. The utility model provides a circuit that is used for earth-leakage protector fault monitoring to report to police and release which characterized in that: including power input end, load end, power supply circuit, trip circuit, automatic monitoring circuit, earth leakage protection circuit, power supply circuit include rectifier bridge D6, diode D5, piezo-resistor MOV2, the power after power input end input for trip circuit and automatic monitoring circuit provide independent power behind the power supply circuit, trip circuit includes trip coil L, one-way silicon controlled rectifier SCR, electric capacity C10, diode D9, automatic monitoring circuit is by including simulation earth leakage circuit, delay circuit, by the earth leakage detection circuit that automatic monitoring chip IC2 and peripheral circuit constitute, pilot lamp LED2, simulation earth leakage circuit includes switch tube Q1, resistance R12, delay circuit includes resistance R7, electric capacity C8, simulation earth leakage circuit can simulate the earth leakage signal, and earth leakage detection circuit monitors the earth leakage signal and detects, when earth leakage protector trouble, when the leakage protection circuit does not work, an indicator light LED2 in the automatic monitoring circuit lights up, the automatic monitoring circuit triggers the tripping circuit to act, the one-way silicon controlled rectifier SCR is conducted, the tripping coil L acts, and the leakage protector trips;

2. The circuit for a earth-leakage protector fault-monitoring alarm and trip according to claim 1, wherein: the power input end comprises a zero line input end and a live wire input end.