Backup protector

Abstract

The utility model relates to the field of circuit break protectors, in particular to a backup protector. Comprising a housing which is internally provided with an installation cavity and is internally provided with two wiring terminals; the gas discharge tube is electrically connected with one of the wiring terminals; the static contact is connected with the gas discharge tube; the moving contact is rotationally arranged in the mounting cavity and is matched with the static contact in an abutting manner; the microswitch is arranged in the mounting cavity, and the end part of the moving contact abuts against an operation reed of the microswitch; the signal terminal is arranged in the mounting cavity and is electrically connected with the microswitch; according to the utility model, when the surge occurs, the moving contact and the static contact are disconnected, and the working state of the microswitch is changed at the same time, so that the structure is simplified, and the cooperation between the microswitch and the moving contact is more sensitive.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a backup protector. Background Art

[0002] A backup protector generally refers to a protection device used to protect a surge protection device (SPD). When the surge protection device in the power system is damaged, the surge protection device will generate leakage current, heat, and cannot trip, resulting in combustion. When the surge protection device has leakage current, the backup protector will detect it and open the circuit of the surge protection device. Its main functions include: protecting equipment: preventing instantaneous voltage rise and protecting electrical equipment from damage; absorbing surges: absorbing and dispersing overvoltage energy and transferring it to the ground; preventing fires and electrical faults: reducing the risk of fires and equipment failures caused by surge current.

[0003] For a general backup protector, the linkage between the micro switch and the moving contact is achieved through a rotating part, which is complex in structure and has a high failure rate.

[0004] Therefore, there is an urgent need to provide an improved technical solution to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a technical effect of a backup protector with a simple structure and higher stability in view of the above existing technical problems.

[0006] In view of this, the utility model provides a backup protector, which is characterized by comprising:

[0007] A housing with an installation cavity inside, and two wiring terminals are arranged inside the housing;

[0008] A gas discharge tube, which is electrically connected to one of the wiring terminals;

[0009] A static contact, which is connected to the gas discharge tube;

[0010] A moving contact, which is rotatably arranged in the installation cavity and is in contact and cooperation with the static contact;

[0011] A micro switch, which is arranged in the installation cavity, and the end of the moving contact abuts against the operating reed of the micro switch;

[0012] A telemetry port, which is arranged in the installation cavity and is electrically connected to the micro switch.

[0013] Further, a contact gasket is arranged at the position where the moving contact abuts against the static contact.

[0014] Further, an arc extinguishing chamber is further included inside the outer shell, and the arc extinguishing chamber is arranged at the contact position between the moving contact and the static contact.

[0015] Further, a limiting rod is arranged in the installation cavity, and when the moving contact, the static contact and the operating reed are separated simultaneously, the limiting rod blocks the continuous rotation of the moving contact.

[0016] Further, the operating reed of the microswitch is arranged towards the end of the moving contact.

[0017] Further, a conductive plate is connected between the gas discharge tube and one of the wiring terminals.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. When a surge occurs in the present utility model, the moving contact and the static contact are disconnected, and at the same time, the microswitch changes its working state. This structure simplifies the structure and makes the cooperation between the microswitch and the moving contact more sensitive.

[0020] 2. By arranging the operating reed of the microswitch towards the end of the moving contact, the stability of the cooperation and contact between the moving contact and the microswitch can be improved in the present utility model. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 2 is an internal structural schematic diagram of the present utility model.

[0023] The markings in the figure are shown as:

[0024] 1. Outer shell; 2. Installation cavity; 3. Wiring terminal; 4. Gas discharge tube; 5. Static contact; 6. Moving contact; 7. Microswitch; 8. Operating reed; 9. Telemetry port; 10. Contact gasket; 11. Arc extinguishing chamber; 12. Limiting rod; 13. Conductive plate. Specific Embodiments

[0025] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0026] Embodiment 1:

[0027] This embodiment provides a backup protector, including:

[0028] An outer shell 1, an installation cavity 2 is arranged inside the outer shell 1, and two wiring terminals 3 are arranged inside the outer shell 1;

[0029] A gas discharge tube 4, the gas discharge tube 4 is electrically connected to one of the terminal blocks 3;

[0030] A static contact 5, the static contact 5 is connected to the gas discharge tube 4;

[0031] A moving contact 6, the moving contact 6 is rotatably arranged in the installation cavity 2 and is in abutting cooperation with the static contact 5;

[0032] A microswitch 7, the microswitch 7 is arranged in the installation cavity 2, and the end of the moving contact 6 abuts against the operating reed 8 of the microswitch 7;

[0033] A telemetry signal port 9, the telemetry signal port 9 is arranged in the installation cavity 2 and is electrically connected to the microswitch 7.

[0034] The backup protector includes a housing 1. A relatively enclosed space is formed inside the housing 1 as the installation cavity 2. Two terminal blocks 3 are provided on the left and right sides of the installation cavity 2. Bolts for wiring are provided on the terminal blocks 3. The gas discharge tube 4 (Gas Discharge Tube, GDT) is used for surge protection in the backup protector. The following are its structure, principle and function: Gas discharge tube 4: It consists of two electrodes and a glass or ceramic tube filled with gas (such as argon or helium). Electrodes: Usually made of metal materials, located at both ends of the tube, contacting the gas. Insulator: The tube wall material, used to isolate the electrodes from the external environment. Principle: Static state: Under normal voltage, the gas in the gas discharge tube 4 is in an insulating state and current cannot flow. Overvoltage: When the voltage exceeds the breakdown voltage of the gas, the gas is excited and becomes conductive. Conductivity: The gas quickly turns into plasma under high voltage, allowing current to flow through, thereby guiding the surge current to the ground wire. Recovery: After the surge, the gas cools down and returns to the insulating state, and the tube disconnects the circuit again. Function: Surge suppression: Effectively absorb and disperse instantaneous high voltage to prevent damage to electrical equipment. Protect the circuit: Reduce the impact of overvoltage on sensitive electronic devices and protect the stability of the system.

[0035] An electromagnetic release unit for controlling the moving contact 6 is also provided in the installation cavity 2. With reference to the prior art and the accompanying drawings, the specific structure is not elaborated in detail. The static contact 5 is fixed in the shell and can be inserted, and the static contact 5 is matched and connected with the gas discharge tube 4. The moving contact 6 is rotatably arranged in the installation cavity 2 and is divided into two states, the moving contact 6 and the static contact 5 are in contact with each other and the moving contact 6 and the static contact 5 are separated. The former is a working state and the latter is a disconnected state. The micro switch 7 is fixed in the installation cavity 2 by a plug-in connection with a plug rod. When the moving contact 6 and the static contact 5 are in contact, the end of the moving contact 6 is in contact with the operating reed 8 of the micro switch 7, compressing the button of the micro switch 7 to trigger the micro switch 7. The micro switch 7 is electrically connected to the remote signal port 9. The connection method between the remote signal port 9 and the micro switch 7 and the structure of the remote signal port 9 can refer to the prior art. The remote signal port 9 is used to receive the state information of the micro switch 7 and output the closing signal and the opening signal. A portion of the remote signal port 9 can extend from the housing 1 to facilitate wiring.

[0036] When encountering a surge, the moving contact 6 is disconnected from the stationary contact 5, and at the same time, the micro switch 7 changes its working state. This structure simplifies the structure and makes the cooperation between the micro switch 7 and the moving contact 6 more sensitive.

[0037] Embodiment 2:

[0038] This embodiment provides a backup protector, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] The movable contact 6 is provided with a contact pad 10 at a position where it contacts the stationary contact 5 .

[0040] The contact gasket 10 is provided to increase the thickness of the contact. The contact gasket 10 is welded on the moving contact 6 and the stationary contact 5 respectively, increasing the thickness of the moving contact 6 and the stationary contact 5. Because during the process of closing or opening the contacts, the material on the contact surface is transferred from one contact to the other contact, causing one contact to gradually become thinner while the other contact to gradually thicken. Thickening the thickness of the contacts can extend the service life of the contacts.

[0041] Embodiment 3:

[0042] This embodiment provides a backup protector, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] The housing 1 further includes an arc extinguishing chamber 11 , which is arranged at the contact position between the moving contact 6 and the stationary contact 5 .

[0044] The arc extinguishing chamber 11 is formed in the housing 1 and is arranged at the contact position between the moving contact 6 and the stationary contact 5 . Parts of the arc extinguishing chamber 11 such as grids are also arranged in the arc extinguishing chamber 11 , and the opening of the arc extinguishing chamber 11 is placed below the housing 1 .

[0045] Embodiment 4:

[0046] This embodiment provides a backup protector, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] The limiting rod 12 is arranged in the installation cavity 2, and when the moving contact 6 is separated from the static contact 5 and the operating spring 8 at the same time, the limiting rod 12 blocks the moving contact 6 from continuing to rotate.

[0048] The limiting rod 12 is provided to prevent the moving contact 6 from rotating too much, thereby preventing the moving contact 6 from being damaged or colliding with other parts.

[0049] Embodiment 5:

[0050] This embodiment provides a backup protector, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] The operating reed 8 of the micro switch 7 is arranged toward the end of the moving contact 6 .

[0052] By arranging the operating reed 8 of the micro switch 7 toward the end of the moving contact 6 , the stability of the matching and abutting between the moving contact 6 and the micro switch 7 can be improved.

[0053] Embodiment 6:

[0054] This embodiment provides a backup protector, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] The conductive plate 13 is connected between the gas discharge tube 4 and one of the connecting terminals 3 .

[0056] The conductive plate 13 can ensure that the gas discharge tube 4 can effectively respond and protect the circuit. This connection method uses the conductive plate 13 to change the electric field distribution, thereby accelerating the gas discharge process and improving the response speed and repeatability. In addition, this connection method also allows the electrical characteristics of the gas discharge tube 4 to be adjusted and optimized according to the requirements of various communication systems, such as DC breakdown voltage, impulse current, power frequency discharge current handling capacity and service life.

[0057] Embodiment 7:

[0058] This embodiment provides a backup protector, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0059] External card slots 14 for connecting external components are also provided on both sides of the housing.

[0060] The external component is an external remote signaling component. The external card slot 14 facilitates the external remote signaling component to be buckled on the backup protector to achieve the remote signaling function. The external remote signaling component is a prior art, and its specific structure will not be discussed further.

[0061] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A backup protector, characterized in that, Comprising: A housing (1) with an installation cavity (2) provided therein, and two terminal blocks (3) are provided in the housing (1); A gas discharge tube (4) electrically connected to one of the terminal blocks (3); A static contact (5) connected to the gas discharge tube (4); A moving contact (6) rotatably arranged in the installation cavity (2) and in abutting engagement with the static contact (5); A microswitch (7) arranged in the installation cavity (2), and the end of the moving contact (6) abuts against the operating reed (8) of the microswitch (7); A telemetry signal port (9) arranged in the installation cavity (2) and electrically connected to the microswitch (7).

2. The backup protector according to claim 1, characterized in that, A contact pad (10) is provided at the position where the moving contact (6) abuts against the static contact (5).

3. The backup protector according to claim 1, characterized in that, An arc extinguishing chamber (11) is further included in the housing (1), and the arc extinguishing chamber (11) is arranged at the abutting position between the moving contact (6) and the static contact (5).

4. The backup protector according to claim 1, characterized in that, A limiting rod (12) is arranged in the installation cavity (2), and when the moving contact (6), the static contact (5) and the operating reed (8) are separated simultaneously, the limiting rod (12) blocks the continuous rotation of the moving contact (6).

5. A backup protector according to claim 1, characterized in that, The operating reed (8) of the microswitch (7) is arranged towards the end of the moving contact (6).

6. A backup protector according to claim 1, characterized in that, A conductive plate (13) is connected between the gas discharge tube (4) and one of the terminal blocks (3).

7. A backup protector according to claim 1, characterized in that, External card slots (14) for connecting external components are further provided on both sides of the housing.

Images