CN214479561U

CN214479561U - Circuit breaker divide-shut brake coil timing protector

Info

Publication number: CN214479561U
Application number: CN202120327748.8U
Authority: CN
Inventors: 赖绍武; 蔡仁贵
Original assignee: Wisdom Electronics Xiamen Co ltd
Current assignee: Wisdom Electronics Xiamen Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-10-22
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses a circuit breaker divide-shut brake coil timing protector, including the circuit breaker, the circuit breaker includes timing protection control circuit, power supply circuit and drive coil circuit, power supply circuit's output with timing protection control circuit's input is connected, timing protection control circuit's output with drive coil circuit's input is connected, drive coil circuit's output and the divide-shut brake coil of circuit breaker are connected.

Description

Circuit breaker divide-shut brake coil timing protector

Technical Field

The utility model relates to a circuit breaker technical field especially relates to a circuit breaker divide-shut brake coil timing protector.

Background

With the rapid development of the world economy, electricity plays a great driving role, and circuit breakers are a non-negligible part of electricity. The protective circuit plays a role in protecting overload, short circuit, electric leakage and the like, and can protect electrical equipment and power supplies. And can also be used for the infrequent switching operation of the circuit under the normal condition. The common AC type leakage circuit breaker electronic assembly has relatively single function, can only detect AC type leakage signals or direct current leakage signals independently, has no function of anti-surge impact misoperation, and cannot play a role in protection when electrified for a long time, so that the circuit breaker opening and closing coil timing protector is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the existing problems in the prior art and providing a circuit breaker divide-shut brake coil timing protector.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a circuit breaker, the circuit breaker includes timing protection control circuit, power supply circuit and drive coil circuit, power supply circuit's output with timing protection control circuit's input is connected, timing protection control circuit's output with drive coil circuit's input is connected, drive coil circuit's output is connected with the divide-shut brake coil of circuit breaker.

Further, the power circuit includes a first current input terminal, a second current input terminal, a rectifier bridge D1, a rectifier diode D3, a fifth resistor R5, a seventh resistor R7, a second capacitor C2, a third rectifier diode D3, a zener diode ZD1 and a varistor R4, the varistor R4 is connected in series between the first current input terminal and the second current input terminal, the first current input terminal and the second current input terminal are respectively connected to the input terminal of the rectifier bridge D1, the first pin output terminal of the rectifier bridge D1 is connected to the first terminal of the rectifier diode D3, the second terminal of the rectifier diode D3 is connected to the input terminal of a voltage reduction circuit formed by connecting the fifth resistor R5 and the seventh resistor R7 in parallel, the output terminal of the voltage reduction circuit is connected to the first terminal of the second capacitor C2 and the anode terminal of the zener diode ZD1, the second terminal of the second capacitor C2 and the cathode terminal of the zener diode ZD1 are respectively connected to the input terminal of the input protection control circuit And end connection.

The timing protection control circuit further includes a timing chip U1, an oscillation resistor R2, a protection resistor R1, and an oscillation capacitor C1, wherein an output terminal of the power supply circuit is connected to a fourteenth pin input terminal of the timing chip U1, a first pin of the timing chip U1 is connected to the oscillation resistor R2, a second pin of the timing chip U1 is connected to the oscillation capacitor C1, a third pin of the timing chip U1 is connected to the protection resistor R1, and an output terminal of a pin 8 of the timing chip U1 is connected to an input terminal of the driving coil circuit.

Further, the driving coil circuit includes a third resistor R3, a sixth resistor R6, and a first driving MOS transistor Q1, an output terminal of the timing protection control circuit is connected to a base of the first driving MOS transistor Q1 and a first end of the sixth resistor R6, an emitter of the first driving MOS transistor Q1 and a first end of the third resistor R3 are connected to a switching coil of the circuit breaker, and a collector of the first driving MOS transistor Q1, a second end of the third resistor R3, and a second end of the sixth resistor R6 are connected to a 10 th pin and a thirteenth pin of a timing chip of the timing protection control circuit, respectively.

Compared with the prior art, the utility model has the following advantage:

the utility model discloses a divide-shut brake coil time delay protector electronic component can play the effect of protection to the long-time circular telegram of circuit breaker divide-shut brake coil to have the function of anti surge impact malfunction, guaranteed the reliability of power supply, various places such as mainly used industry, commercial, high-rise, private residence.

Drawings

Fig. 1 is a circuit schematic diagram of the circuit breaker opening and closing coil timing protector of the utility model;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1, the utility model discloses a circuit breaker, circuit breaker includes timing protection control circuit, power supply circuit and drive coil circuit, power supply circuit's output with timing protection control circuit's input is connected, timing protection control circuit's output with drive coil circuit's input is connected, drive coil circuit's output is connected with the divide-shut brake coil of circuit breaker.

The power supply circuit comprises a first current input end, a second current input end, a rectifier bridge D1, a rectifier diode D3, a fifth resistor R5, a seventh resistor R7, a second capacitor C2, a third rectifier diode D3, a voltage stabilizing diode ZD1, a fast recovery diode D2 and a piezoresistor R4, wherein the piezoresistor R4 is connected between the first current input end and the second current input end in series, the first current input end and the second current input end are respectively connected with the input end of the rectifier bridge D1, a first pin output end of the rectifier bridge D1 is connected with a first end of the rectifier diode D3, a second end of the rectifier diode D3 is connected with the fifth resistor R5 and the seventh resistor R7 in parallel to form an input end of a voltage reducing circuit, an output end of the voltage reducing circuit is connected with a first end of the second capacitor C2 and an anode end of the voltage stabilizing diode ZD1, and a second end of the second capacitor C2 and a cathode end of the voltage stabilizing diode ZD1 are respectively connected with the protection circuit control terminal Is connected to the input terminal of the controller.

The voltage is changed into pulsating direct current through the action of a rectifier bridge, one path of the direct current directly supplies power to a coil, the other path of the direct current passes through a rectifier diode D3, a resistor R5 and a resistor R7 to form a voltage reduction circuit, a power supply is provided for an IC of a rear U1, the voltage is ensured to be stable through C2 capacitor filtering and a voltage stabilizing diode ZD1, and a piezoresistor R4 is used for preventing surge impact misoperation. D2 is a fast recovery diode.

The timing protection control circuit comprises a timing chip U1, an oscillation resistor R2, a protection resistor R1 and an oscillation capacitor C1, wherein the output end of the power supply circuit is connected with the input end of a fourteenth pin of the timing chip U1, a first pin of the timing chip U1 is connected with the oscillation resistor R2, a second pin of the timing chip U1 is connected with the oscillation capacitor C1, a third pin of the timing chip U1 is connected with the protection resistor R1, and the output end of a pin 8 of the timing chip U1 is connected with the input end of the driving coil circuit.

The voltage with the voltage dropped at the front end supplies power to the IC through an IC 14 pin of U1 to enable the IC to work normally, the protection time is connected with an oscillation resistor R2 through a pin 1 of U1, an oscillation capacitor C1 through a pin 2, and a protection resistor R1 through a pin 3 to jointly form an external resistance-capacitance network end of the oscillator, the protection time is determined through an oscillation frequency formula f-1/(23 RTC CTC), the values of the oscillation resistor R2 and the oscillation capacitor C1, and the protection resistor R1 is matched with the value of 2R 2.

When the controller starts to work, the pin 9 of the U1 is connected with high level, so the pin 8 of the U1 outputs high level to the driving coil circuit, and after the protection time which is jointly set by the front pins C1 and R2, the pin 8 of the U1 outputs low level to the driving coil circuit.

The driving coil circuit comprises a third resistor R3, a sixth resistor R6 and a first driving MOS transistor Q1, the output end of the timing protection control circuit is connected with the base of the first driving MOS transistor Q1 and the first end of the sixth resistor R6, the emitter of the first driving MOS transistor Q1 and the first end of the third resistor R3 are connected with the switching coil of the circuit breaker, and the collector of the first driving MOS transistor Q1, the second end of the third resistor R3 and the second end of the sixth resistor R6 are respectively connected with the 10 th pin and the thirteenth pin of the timing chip of the timing protection control circuit.

When the controller starts to work, 8 feet of the U1 output high level to drive the MOS tube Q1 to be connected, the circuit breaker switching-on and switching-off coil attracts, and 8 feet of the U1 output low level to drive the MOS tube Q1 to be cut off, and the circuit breaker switching-on and switching-off coil is disconnected. When the MOS transistor Q1 is cut off, the D pole input voltage is too large, the resistor R6 plays a protection role, and the voltage dependent resistor R3 is in surge impact resistance misoperation.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The circuit breaker opening and closing coil timing protector comprises a circuit breaker and is characterized in that the circuit breaker comprises a timing protection control circuit, a power circuit and a driving coil circuit, the output end of the power circuit is connected with the input end of the timing protection control circuit, the output end of the timing protection control circuit is connected with the input end of the driving coil circuit, and the output end of the driving coil circuit is connected with an opening and closing coil of the circuit breaker.

2. The circuit breaker opening and closing coil timing protector according to claim 1, wherein the power circuit comprises a first current input terminal, a second current input terminal, a rectifier bridge D1, a rectifier diode D3, a fifth resistor R5, a seventh resistor R7, a second capacitor C2, a third rectifier diode D3, a zener diode ZD1 and a piezoresistor R4, the piezoresistor R4 is connected in series between the first current input terminal and the second current input terminal, the first current input terminal and the second current input terminal are respectively connected with the input terminal of the rectifier bridge D1, the first pin output terminal of the rectifier bridge D1 is connected with the first terminal of the rectifier diode D3, the second terminal of the rectifier diode D3 is connected with the fifth resistor R5 and the seventh resistor R7 in parallel to form the input terminal of a voltage reduction circuit, the output terminal of the voltage reduction circuit is connected with the first terminal of the second capacitor C2 and the anode terminal of the zener diode ZD1, the second end of the second capacitor C2 and the cathode end of the zener diode ZD1 are respectively connected to the input end of the timing protection control circuit.

3. The circuit breaker opening and closing coil timing protector according to claim 1, wherein the timing protection control circuit comprises a timing chip U1, an oscillating resistor R2, a protection resistor R1 and an oscillating capacitor C1, and an output end of the power supply circuit is connected with a fourteenth pin input end of the timing chip U1.

4. The circuit breaker opening and closing coil timing protector according to claim 3, wherein a first pin of the timing chip U1 is connected with the oscillation resistor R2, a second pin of the timing chip U1 is connected with the oscillation capacitor C1, a third pin of the timing chip U1 is connected with the protection resistor R1, and an 8 th pin output end of the timing chip U1 is connected with an input end of the driving coil circuit.

5. The circuit breaker opening and closing coil timing protector according to claim 1, wherein the driving coil circuit comprises a third resistor R3, a sixth resistor R6 and a first driving MOS transistor Q1, an output end of the timing protection control circuit is connected with a base of the first driving MOS transistor Q1 and a first end of the sixth resistor R6, an emitter of the first driving MOS transistor Q1 and a first end of the third resistor R3 are connected with the opening and closing coil of the circuit breaker, and a collector of the first driving MOS transistor Q1, a second end of the third resistor R3 and a second end of the sixth resistor R6 are respectively connected with a 10 th pin and a thirteenth pin of a timing chip of the timing protection control circuit.