CN211790736U

CN211790736U - Leakage protector circuit of independent power supply tripping

Info

Publication number: CN211790736U
Application number: CN202020680424.8U
Authority: CN
Inventors: 杨爱国
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-10-27
Anticipated expiration: 2030-04-28

Abstract

The utility model relates to an earth leakage protection technical field especially relates to a earth-leakage protector circuit of independent power supply dropout, including live wire, zero line, switch, trip coil, step-down filter circuit, leakage detection chip, silicon controlled rectifier, the live wire connects gradually trip coil the silicon controlled rectifier the leakage detection chip step-down filter circuit the zero line, the trip coil lug connection switch on the zero line, the silicon controlled rectifier with lug connection has the power indicator between the zero line, trip coil with lug connection has trip system supply circuit between the silicon controlled rectifier, trip system supply circuit is half-wave rectifier circuit, the live wire with lug connection has the detection operating system supply circuit between the zero line.

Description

Leakage protector circuit of independent power supply tripping

Technical Field

The utility model relates to an earth leakage protection technical field especially relates to an earth leakage protector circuit of independent power supply dropout.

Background

Leakage protection is a safety protection measure that can automatically cut off the power supply or send out an alarm signal when the leakage current of the power grid exceeds a certain set value. The existing leakage protector circuit usually supplies power to a leakage detection system by taking power from a tripping coil of a tripping system, so that the internal tripping coil of the leakage protector has a tiny current passing through the leakage protector in a normal standby state, the current passing through the leakage protector circuit can enable the tripping coil to generate an electromagnetic field, the normal work of an electrical appliance and other electrical equipment can be influenced, and the electrical appliance is easily caused to generate faults and interfere the normal operation of other electrical appliances.

SUMMERY OF THE UTILITY MODEL

To the current situation of above-mentioned prior art, the utility model provides a leakage protector circuit of independent power supply dropout to solve above-mentioned technical problem.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides an earth-leakage protector circuit of independent power supply dropout, includes live wire, zero line, switch, trip coil, step-down filter circuit, leakage detection chip, silicon controlled rectifier SCR, the live wire connects gradually trip coil silicon controlled rectifier SCR the leakage detection chip step-down filter circuit the zero line, the trip coil lug connection switch on the zero line, silicon controlled rectifier SCR with lug connection has the power indicator between the zero line, trip coil with lug connection has trip system supply circuit between the silicon controlled rectifier SCR, trip system supply circuit includes half-wave rectifier circuit, the live wire with lug connection has the detection operation system supply circuit between the zero line.

By adopting the technical scheme, when no electric leakage occurs, the current directly passes through the rectifying circuit directly connected with the live wire and the zero line without passing through the trip coil, and the trip coil does not generate a magnetic field due to the current and does not influence the normal work of other electric appliances; when electric leakage occurs, the leakage point detection chip transmits signals to the Silicon Controlled Rectifiers (SCR) and switches on a circuit between the SCR and the directly connected rectifying circuit, current can also pass through the trip coil and trip the trip coil, so that a switch on a live line and a zero line is also opened, and the power input end and the output end of the power supply are disconnected to use an electric appliance to cut off the power, thereby achieving the purpose of protection.

The leakage current detection chip is further connected with a leakage current adjusting circuit, the leakage current adjusting circuit is connected with a test circuit, a detection ring is connected between the test circuit and the leakage current adjusting circuit branch, and the test circuit can be directly connected with the live wire and the zero line.

By adopting the technical scheme, the test circuit can detect whether the leakage circuit is useful or not, and the leakage current adjusting circuit can adjust the test current.

The power supply circuit of the detection operation system is further arranged to be a full-wave rectification circuit.

The power supply circuit of the detection operation system is further provided as a half-wave rectification circuit.

Compared with the prior art, the utility model has the advantages of:

the utility model provides a leakage protector circuit of independent power supply dropout, including live wire, zero line, switch, trip coil, step-down filter circuit, electric leakage detection chip, silicon controlled rectifier SCR, through increasing trip system supply circuit and detection operation system supply circuit in the circuit, when electrical apparatus normally works, directly supply power for electrical apparatus by detection operation system supply circuit, make no electric current pass through in the trip coil, at this moment trip coil self just can not produce the magnetic field because of having the electric current, can not influence the normal work of other electrical apparatus; when electric leakage occurs, the controlled silicon is conducted, the tripping coil is conducted and flows large current, so that the tripping coil generates a strong magnetic field and trips, and the yellow sheet switch on the live wire and the zero wire is switched off, thereby achieving the purpose of protection.

Drawings

Fig. 1 is a schematic circuit diagram of a first embodiment of the present invention;

fig. 2 is a schematic circuit diagram according to a first embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a second embodiment of the present invention;

fig. 4 is a first circuit schematic diagram of a second embodiment of the present invention;

fig. 5 is a second circuit schematic diagram according to a second embodiment of the present invention.

Detailed Description

As shown in fig. 1 and fig. 2, the utility model discloses a leakage protector circuit of independent power supply dropout, including live wire, zero line, switch, trip coil, step-down filter circuit, leakage detection chip, silicon controlled rectifier SCR. A voltage dependent resistor is connected between the live wire and the zero line, the live wire is sequentially connected with a tripping coil, a Silicon Controlled Rectifier (SCR), a leakage detection chip, a voltage reduction filter circuit and the zero line, the tripping coil is connected with a switch, the switch is a yellow sheet in the drawing, a tripping system power supply circuit is connected between the tripping coil and the Silicon Controlled Rectifier (SCR), the tripping system power supply circuit is a half-wave rectification circuit, and a detection operation system power supply circuit can be directly connected between the live wire and the zero line.

Example one

The power supply circuit of the detection operation system is a full-wave rectifying circuit, the full-wave rectifying circuit is also connected between the voltage reduction filtering circuit and the zero line, a power indicator lamp is connected between the full-wave rectifying circuit and the Silicon Controlled Rectifier (SCR), and the power indicator lamp is connected to two ends of the voltage reduction filtering circuit and the electric leakage detection chip.

The electric leakage detection chip is further connected with a leakage current adjusting circuit, the leakage current adjusting circuit is formed by connecting R2 and C6 in parallel, two ends of C6 are connected with detection rings, the other end of each detection ring is connected with a test circuit, the test circuit is formed by connecting R5, R6 and test buttons in series, and the test buttons are connected with a live wire.

Example two

As shown in fig. 3 to 5, the power supply circuit of the detection operation system is a half-wave rectifier circuit.

The implementation principle of the embodiment is as follows: when the electrical appliance normally works, current directly passes through a rectifying circuit directly connected with a live wire and a zero line, and then the trip coil does not generate a magnetic field due to the current and does not influence the normal work of other electrical appliances; when electric leakage occurs, the SCR is conducted, large current is generated and flows through the tripping coil, the tripping coil generates a strong magnetic field, a yellow sheet switch on a fire zero line is turned on, and the power input end and the power output end are disconnected to use an electric appliance to cut off the power, so that the protection purpose is achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a leakage protector circuit of independent power supply dropout, includes live wire, zero line, switch, trip coil, step-down filter circuit, leakage detection chip, silicon controlled rectifier SCR, its characterized in that: the live wire connects gradually trip coil, silicon controlled rectifier SCR the earth leakage detection chip the step-down filter circuit the zero line, trip coil lug connection the switch on the zero line, silicon controlled rectifier SCR with lug connection has the power indicator between the zero line, trip coil with lug connection has trip system supply circuit between the silicon controlled rectifier SCR, trip system supply circuit includes half-wave rectifier circuit, the live wire with also lug connection has the detection operation system supply circuit between the zero line.

2. A self-contained power supply trip creepage protector circuit according to claim 1, wherein: the leakage current detection chip is further connected with a leakage current adjusting circuit, the leakage current adjusting circuit is connected with a test circuit, a detection ring is connected between the test circuit and the leakage current adjusting circuit branch, and the test circuit can be directly connected with the live wire and the zero line.

3. A self-contained power supply trip creepage protector circuit according to claim 2, wherein: the power supply circuit of the detection operation system is a full-wave rectification circuit.

4. A self-contained power supply trip creepage protector circuit according to claim 2, wherein: the power supply circuit of the detection operation system is a half-wave rectification circuit.