CN202872329U

CN202872329U - Circuit breaker with overvoltage protection function

Info

Publication number: CN202872329U
Application number: CN 201220596241
Authority: CN
Inventors: 邓小霞; 张文昭
Original assignee: Hunan University of Science and Engineering
Current assignee: Hunan University of Science and Engineering
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2013-04-10
Anticipated expiration: 2022-11-13

Abstract

The utility model relates to a circuit breaker with overvoltage protection. It also includes an overvoltage protector. The overvoltage protector is connected in parallel to the two connection terminals after the test button and the test resistor are connected in series. The overvoltage protector is in an open state when the voltage exceeds 260V. When the voltage exceeds 260V, the overvoltage protector is in a short circuit state. At this time, the circuit breaker trips to achieve the protection function, which is used to protect household appliances from overvoltage damage. The advantage is that an overvoltage protector is added to the circuit breaker to achieve double protection from leakage and overvoltage. The structure is simple and easy to implement.

Description

A kind of circuit breaker with overvoltage protection

Technical field

The utility model relates to a kind of circuit breaker, especially a kind of circuit breaker with overvoltage protection.

Background technology

Civil power is people's household electricity; its stability directly affects people's living standard; thunder and lightning exists in China's most area; the line voltage moment increase or the misphase civil power 220V lighting voltage that are caused by thunder and lightning become 380V power voltage; the accident that causes the household electrical appliance overvoltage to burn occurs repeatedly; and common circuit breaker only possesses switching function and creepage protection function, and almost every household has all installed a plurality of circuit breakers with electronic box.

Summary of the invention

The utility model provides a kind of circuit breaker with overvoltage protection, avoids the civil power users' such as domestic consumer, unit AC electric equipment not damage because of power network overvoltage.

For solving the problems of the technologies described above; the technical solution adopted in the utility model is: a kind of circuit breaker with overvoltage protection; comprise circuit breaker 1; circuit breaker 1 is by the end of incoming cables; leading-out terminal; magnetictrip; electronic building brick; main switch; test button; test resistance; zero sequence current mutual inductor forms; it is characterized in that: also comprise overvoltage protector 2; overvoltage protector 2 is connected in parallel on two links after test button and the test resistance series connection; overvoltage protector 2 is in open-circuit condition when normal; when voltage surpasses 260V; overvoltage protector 2 is in short-circuit condition; this moment, circuit breaker 1 work was threaded off, and reached protective effect.

The utility model has the advantages that increases overvoltage protector in circuit breaker, realize the electric leakage overvoltage double protection, simple in structure, is easy to realize applied range.

Description of drawings

Fig. 1 is theory diagram of the present utility model;

Among the figure: 1 is circuit breaker; 2 is overvoltage protector.

Embodiment

As shown in Figure 1; a kind of circuit breaker with overvoltage protection; comprise circuit breaker 1; circuit breaker 1 is comprised of end of incoming cables, leading-out terminal, magnetictrip, electronic building brick, main switch, test button, test resistance, zero sequence current mutual inductor; also comprise overvoltage protector 2; overvoltage protector 2 is connected in parallel on two links after test button and the test resistance series connection; overvoltage protector 2 is in open-circuit condition when normal; when voltage surpasses 260V; overvoltage protector 2 is in short-circuit condition; this moment, circuit breaker 1 work was threaded off, and reached protective effect.

In the present embodiment, overvoltage protector 2 can adopt varistor, semiconductor discharge tube, the lightning protected pipe of 260V.

Claims

1. A circuit breaker with overvoltage protection, including a circuit breaker (1). The circuit breaker (1) consists of an incoming line terminal, an outgoing line terminal, an electromagnetic release, an electronic component, a main switch, a test button, a test resistor, a zero Sequence current transformer, characterized in that it also includes an overvoltage protector (2), and the overvoltage protector (2) is connected in parallel to the two connection ends after the test button and the test resistor are connected in series. When the overvoltage protector (2) is normal It is in an open circuit state, and when the voltage exceeds 260V, the overvoltage protector (2) is in a short circuit state, and at this time the circuit breaker (1) works and trips to achieve the protection function.

2. The circuit breaker according to claim 1, characterized in that: the overvoltage protector (2) adopts a 260V piezoresistor or a semiconductor discharge tube or a lightning protection tube.