CN209767142U - Overvoltage protection device used in circuit - Google Patents

Abstract

The utility model discloses an overvoltage protection device used in a circuit, which comprises a filter, a trigger module and a RC circuit, wherein a power supply is connected to the RC circuit after passing through the filter and the trigger circuit in sequence; when the trigger module detects the overvoltage of the circuit, the trigger module controls the circuit to be disconnected. The utility model discloses with low costs and simple reliable, components and parts in the automatic disconnection timely protection circuit behind fast, the interference killing feature of response speed, excessive pressure.

Description

Overvoltage protection device used in circuit

Technical Field

The utility model relates to a circuit protection field, in particular to an overvoltage protector for in circuit.

Background

The power supply device can generate output overvoltage due to the failure of the voltage stabilizing circuit, and once the overvoltage occurs, the power supply device can permanently fail and can hurt load equipment of the power supply device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an overvoltage protector for in circuit, with low costs and simple reliable, components and parts in the automatic disconnection in time protection circuit behind fast, the interference killing feature of response speed, excessive pressure.

in order to achieve the above purpose, the utility model discloses a realize through following technical scheme:

an overvoltage protection device used in a circuit is characterized by comprising a filter, a trigger module and an RC circuit, wherein a power supply is connected to the RC circuit after sequentially passing through the filter and the trigger circuit;

when the trigger module detects the overvoltage of the circuit, the trigger module controls the circuit to be disconnected.

The overvoltage protection device also comprises a monitoring module connected with the circuit and used for monitoring the current and the voltage in the circuit.

The monitoring module comprises:

The current transformer is connected with a power supply end in a circuit and used for monitoring the current in the circuit;

And the voltage transmitter is connected with the power supply end through a circuit and used for monitoring the voltage in the circuit.

The trigger module comprises a plurality of surge protectors, and when the surge protectors detect overvoltage of the circuit, overvoltage voltage is led into the PE end of the surge protectors.

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

1. The current and voltage in the circuit can be monitored in real time, and the purpose of protecting the circuit is achieved in time when the circuit is in overvoltage.

2. The response speed is fast, the anti-jamming capability is strong, and the components in the timely protection circuit can be automatically disconnected after overvoltage.

3. The circuit is simple, the debugging and the maintenance are convenient, and the cost is low.

4. The surge protector has high reliability and can not generate artificial misoperation to cause the phenomenon of out of control.

Drawings

Fig. 1 is a structural diagram of an overvoltage protection device used in an electric circuit according to the present invention.

Detailed Description

The present invention will be further described by the following detailed description of a preferred embodiment thereof, taken in conjunction with the accompanying drawings.

As shown in fig. 1, an overvoltage protection device for a circuit includes a filter 1, a trigger module 2 and an RC circuit 3, wherein a power supply is connected to the RC circuit 3 after passing through the filter 1 and the trigger module 2 in sequence; when the trigger module 2 detects the overvoltage of the circuit, the trigger module 2 controls the circuit to be disconnected.

the upper overvoltage protection device also comprises a monitoring module connected with the circuit and used for monitoring the current and the voltage in the circuit.

The monitoring module comprises: a current transformer 41, the breaker 8 of which is electrically connected to the power supply terminal, for monitoring the current in the circuit; and a voltage transmitter 42, which is electrically connected to the power source terminal, for monitoring the voltage in the circuit.

The voltage transducer 42 is connected to the power supply end through a first circuit breaker 6, the RC circuit 3 is further connected in series with a switch 5 with an indicator light, and the RC circuit 3 is further connected to the output end of the filter 1 through a second circuit breaker 7.

The trigger module include a plurality of surge protectors, work as when surge protector detect the circuit excessive pressure, with the leading-in PE end to surge protector of the voltage of excessive pressure, specifically, this surge protector quantity is 3, surge protector be equipped with L/N end, PE end, first surge protector 21's L/N end is connected in the first output of wave filter, first surge protector's PE end ground connection, second surge protector 22's L/N end is connected in the first output of wave filter, second surge protector's PE end is connected in the second output of wave filter, third surge protector 23's PE end ground connection, third surge protector's L/N end is connected in the second output of wave filter, overvoltage after-holding voltage is stable then surge protector contact automatic re-setting closed, the circuit then normally works.

To sum up, the utility model relates to an overvoltage protector for in circuit, with low costs and simple reliable, components and parts in the automatic disconnection in time protection circuit behind fast, the interference killing feature of response speed, excessive pressure.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (2)

1. An overvoltage protection device used in a circuit is characterized by comprising a filter, a trigger module and an RC circuit, wherein a power supply is connected to the RC circuit after sequentially passing through the filter and the trigger circuit;

When the trigger module detects the overvoltage of the circuit, the trigger module controls the circuit to be disconnected;

The overvoltage protection device also comprises a monitoring module connected with the circuit and used for monitoring the current and the voltage in the circuit;

The monitoring module comprises:

The current transformer is connected with a power supply end in a circuit and used for monitoring the current in the circuit;

And the voltage transmitter is connected with the power supply end through a circuit and used for monitoring the voltage in the circuit.

2. The overvoltage protection device for use in an electrical circuit of claim 1, wherein said trigger module includes surge protectors, and when said surge protectors detect an overvoltage in the electrical circuit, overvoltage is applied to the PE terminals of the surge protectors.