CN207166129U - A kind of protection device of power line - Google Patents

Abstract

The utility model discloses a kind of protection device of power line, including RCCB, capacitor and Self-recover overvoltage-undervoltage protector；The input of the RCCB is respectively connected to live wire and zero line；The capacitor input is connected with the fire wire output end of RCCB, and the capacitor output is connected with the live wire input of Self-recover overvoltage-undervoltage protector；The zero line output end of the RCCB is directly connected with the zero line input of Self-recover overvoltage-undervoltage protector；The load zero line with user, load live wire are connected respectively for the zero line output end of the Self-recover overvoltage-undervoltage protector, fire wire output end.The utility model circuit structure is simple, and design science is reasonable, can effectively solve due to caused by short circuit electrical equipment damage problem, solves the problems, such as circuit occur short circuit, leak electricity, it is over-pressed, under-voltage in the case of electricity consumption power supply can be disconnected in very short time.

Description

A protection device for a power cord

technical field

The utility model relates to the field of circuit protection equipment, in particular to a protection device for a power line.

Background technique

A short circuit refers to an abnormal connection between the live wire and the neutral wire during the operation of the power system. When the circuit is short-circuited, the circuit will be burned due to excessive current, which will cause damage to electrical appliances and equipment, and cause a fire if it is serious.

At present, electricity has become the basis for the operation of social and industrial systems. With the rapid development of household appliances and the increase of large-scale electrical equipment, the power supply voltage is often overloaded, and there are problems such as overvoltage, undervoltage and voltage mutation. It causes the problems of burning electrical appliances and burning lines, and because of this kind of problem, the burning rate is very high during the user's use, and it often happens.

Due to the lack of maintenance of the line, the aging of the line and the artificial short circuit, some circuits will be short-circuited. Leakage circuit breakers and air switches currently on the market are only aimed at personal electric shock accidents that may be caused by line leakage, and cannot effectively solve the problem of electrical damage caused by wire short circuit; If it is too large, it will cause the burning of electrical equipment and a fire, which will seriously endanger the personal safety of users and the economic loss of property.

Relays, short circuit protectors, overvoltage and undervoltage protectors, leakage circuit breakers, air switches, etc. currently on the market are all controlled by current and voltage during use, especially when a short circuit fault occurs in the line, due to tripping It is slow and requires the cooperation of multiple circuits and multiple components, and it will not be able to protect when a fault occurs.

Utility model content

In order to solve the above problems, the utility model proposes a protection device for power lines. The circuit structure of the utility model is simple, and the design is scientific and reasonable. 1. In the case of undervoltage, the power supply can be disconnected in a very short time; the utility model is not affected by the current and voltage, and can effectively protect the circuit and the electrical equipment.

Technical scheme of the utility model:

A protection device for a power line is proposed, the protection device for the power line includes a leakage circuit breaker, a capacitor and a self-resetting overvoltage and undervoltage protector; the input ends of the leakage circuit breaker are respectively connected to live wires and neutral wires; the capacitor The input terminal is connected to the live wire output terminal of the leakage circuit breaker, and the capacitor output terminal is connected to the live wire input terminal of the self-resetting overvoltage and undervoltage protector; the neutral line output terminal of the leakage circuit breaker is directly connected to the self-resetting overvoltage and undervoltage protector The neutral line input terminal of the protector is connected; the neutral line output terminal and the live line output terminal of the self-resetting overvoltage and undervoltage protector are respectively connected with the user's load neutral line and load live line; the capacitor is non-polar.

The overall concept of the utility model: when the live wire and the neutral wire are abnormally connected, the capacitor reduces the voltage of the entire line to zero, and randomly triggers the self-resetting overvoltage and undervoltage protector and leakage circuit breaker to protect the line from power failure.

Further, the connected neutral wire and live wire are both power supply lines of 220V mains alternating current power supply voltage.

Further, the connection modes of the capacitor and the live wire include single connection, parallel connection and series connection.

Further, when the capacitors are connected in parallel and in series with the live wire, the number of capacitors is two or more.

The beneficial effects of the utility model:

1. Simple structure, fast installation and replacement;

2. When short circuit, electric leakage, electric shock, overload, overvoltage or undervoltage occur in the line, the utility model can automatically disconnect the user's power supply within 0.1s, and the response speed is fast;

3. When short circuit, electric leakage, electric shock, overload, overvoltage or undervoltage occur in the circuit, the utility model will not burn out the circuit and electrical equipment, thereby avoiding fire;

4. The circuit structure of the utility model is simple, and the design is scientific and reasonable, which can effectively solve the problem of electrical damage caused by short circuit, and solve the problem that the circuit can be disconnected in a very short time in the case of short circuit, leakage, overvoltage and undervoltage. The problem of electric power supply; the utility model is not affected by the magnitude of current and voltage, and can effectively protect circuits and electrical equipment.

Description of drawings

Fig. 1 is the circuit diagram of the single capacitor of the present utility model;

Fig. 2 is the circuit diagram of the parallel connection of double capacitors of the present utility model;

Fig. 3 is the circuit diagram of the series connection of double capacitors of the present utility model;

Name and serial number in the picture:

Leakage circuit breaker 1, single capacitor 2, parallel double capacitor 3, series double capacitor 4, self-resetting overvoltage and undervoltage protector 5.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1:

As shown in Figure 1, a protection device for a power line is provided, which includes a leakage circuit breaker, a capacitor, and a self-resetting overvoltage and undervoltage protector 5; the input terminals of the leakage circuit breaker 1 are respectively connected to live wire and neutral wire; the capacitor input end is connected with the live wire output end of the earth leakage circuit breaker 1, and the capacitor output end is connected with the live wire input end of the self-resetting overvoltage and undervoltage protector 5; the earth leakage circuit breaker 1 The zero line output end is directly connected with the zero line input end of the self-resetting overvoltage and undervoltage protector 5; The capacitor is non-polar; the neutral line and live line connected are both power supply lines of 220V mains AC power supply voltage.

The connection mode between the capacitor and the live wire is single connection.

Example 2:

As shown in FIG. 2 , the difference between this embodiment and Embodiment 1 is that: the capacitor and the live wire are connected in parallel with two capacitors.

Example 3:

As shown in FIG. 3 , the difference between this embodiment and Embodiment 1 is that: the capacitor and the live wire are connected in series with two capacitors.

It should be pointed out that the above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to allow those familiar with this technology to understand the content of the present utility model and implement it accordingly, and cannot limit the utility model accordingly. scope of protection. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (4)

1. A kind of 1. protection device of power line, it is characterised in that：The protection device of the power line includes RCCB, electric capacity Device and Self-recover overvoltage-undervoltage protector；The input of the RCCB is respectively connected to live wire and zero line；The capacitor is defeated Enter end with the fire wire output end of RCCB to be connected, the live wire of the capacitor output and Self-recover overvoltage-undervoltage protector Input is connected；Zero line input phase of the zero line output end of the RCCB directly with Self-recover overvoltage-undervoltage protector Connection；The load zero line with user, load are fiery respectively for the zero line output end of the Self-recover overvoltage-undervoltage protector, fire wire output end Line is connected；The capacitor is non-polar.
2. 2. the protection device of power line according to claim 1, it is characterised in that：The zero line and live wire of the access be all The supply line of 220V mains supply voltages.
3. 3. the protection device of power line according to claim 1, it is characterised in that：The connection side of the capacitor and live wire Formula includes simply connected, in parallel and serial.
4. 4. the protection device of power line according to claim 3, it is characterised in that：The connection side of the capacitor and live wire When formula is in parallel and serial, the quantity of capacitor is two or more.