Surge protector with short-circuit current protection function

Abstract

The utility model relates to a surge protector with a short-circuit current protection function, which comprises a shell, an operating mechanism arranged in the shell, a moving contact in linkage fit with the operating mechanism, a static contact matched with the moving contact, an electromagnetic release, a lightning protection module, a first wiring terminal and a second wiring terminal, the lightning protection module comprises a voltage dependent resistor, an upper electrode arranged on the voltage dependent resistor and connected with the static contact, a lower electrode arranged on the voltage dependent resistor and connected with the static contact, and a middle electrode arranged on the voltage dependent resistor and connected with the second wiring terminal, and a current transformer is arranged on the side, corresponding to the first wiring terminal, in the shell. The first wiring terminal is provided with a conducting strip which is inserted in the current transformer in a penetrating mode, and the conducting strip is connected with the moving contact in a flexible connection mode. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly, safety and reliability, and short circuit protection function.

Description

Technical Field

[0001] The utility model relates to a surge protector, in particular to a surge protector with a short-circuit current protection function. Background Art

[0002] A surge protector, also known as a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When external interference suddenly generates a spike in current or voltage in an electrical circuit or communication line, the surge protector quickly conducts and diverts the current, preventing damage to other devices in the circuit. Existing surge protectors lack short-circuit current protection, failing to meet user requirements. They also suffer from complex structures, unreliable performance, and inconvenient assembly. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a surge protector with a short-circuit current protection function that is simple in structure, stable and reliable in performance, easy to assemble, and safe and reliable.

[0004] To achieve the above-mentioned purpose, the utility model adopts a surge protector with a short-circuit current protection function, comprising a shell, an operating mechanism arranged in the shell, a moving contact linked with the operating mechanism, a static contact coordinated with the moving contact, an electromagnetic release, a lightning protection module, a first terminal, and a second terminal. The lightning protection module includes a varistor, an upper electrode arranged on the varistor and connected to the static contact, a lower electrode arranged on the varistor and connected to the static contact, and a middle electrode arranged on the varistor and connected to the second terminal. A current transformer is arranged on the side of the shell corresponding to the first terminal. The first terminal has a conductive sheet inserted into the current transformer, and a soft connection is connected between the conductive sheet and the moving contact.

[0005] The beneficial effects of the above structure are: the lightning protection module can provide lightning protection, preventing damage to equipment caused by voltage surges caused by grid operations or other external factors, providing higher safety. The current transformer can monitor short-circuit current. When a short circuit occurs in the line, the current transformer detects the short-circuit current, activates the electromagnetic release, and triggers the bracket of the operating mechanism, causing the operating mechanism to trip and open, thereby realizing the short-circuit protection function of the surge protector. As a result, the surge protector has the advantages of simple structure, stable and reliable performance, convenient assembly, and safe and reliable short-circuit protection function.

[0006] Specifically, a microswitch is positioned within the housing on the side corresponding to the moving contact. A clamping plate is mounted on the moving contact, cooperating with the microswitch. The clamping plate moves with the moving contact and triggers the microswitch, turning the microswitch on and off. The housing also includes a signal terminal electrically connected to the microswitch. The microswitch monitors the position of the moving contact, and the signal terminal transmits the microswitch's monitoring signal to a backend, thereby improving the surge protector's reliability.

[0007] In particular, the static contact is provided with a snap-fit portion at each end that engages with the housing. The housing is provided with a snap-fit groove that engages with the snap-fit portion. The snap-fit portion engages within the snap-fit groove, thereby forming a snap-fit connection between the static contact and the housing. This snap-fit connection facilitates assembly of the static contact and the housing, improving assembly efficiency.

[0008] In particular, the housing is provided with a positioning slot that mates with the electromagnetic release, the electromagnetic release engages within the positioning slot, and the electromagnetic release is covered with a shield. The electromagnetic release engages within the housing's positioning slot, facilitating assembly of the electromagnetic release and the housing, while the shield shield shields interference signals, thereby improving the operational reliability of the surge protector.

[0009] Specifically, the housing includes a reset plate that engages with the ejector rod of the electromagnetic release. The operating mechanism's bracket includes a curved raised portion that abuts against one side of the reset plate. The operating mechanism's bracket drives the reset plate via the curved raised portion, ensuring more reliable transmission between the bracket and the reset plate.

[0010] Specifically, the reset plate has a positioning hole at one end, a positioning rod inserted into the positioning hole within the housing, and a bump on the other side of the other end of the reset plate that abuts against the top rod of the electromagnetic release. The reset plate is pivotally mounted on the positioning rod within the housing, facilitating assembly of the reset plate with the housing and ensuring reliable operation. Furthermore, the reset plate engages with the top rod of the electromagnetic release via the bump, ensuring more reliable transmission between the reset plate and the electromagnetic release. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the internal structure of an embodiment of the present utility model.

[0012] Figure 2 This is an exploded view of an embodiment of the present utility model.

[0013] Figure 3 This is the main view of the internal structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] like Figures 1 to 3 As shown, an embodiment of the present utility model is a surge protector with a short-circuit current protection function, comprising a housing 10, an operating mechanism 11 arranged in the housing 10, a moving contact 12 linked to the operating mechanism 11, a static contact 13 coordinated with the moving contact 12, an electromagnetic release 14, a lightning protection module 20, a first terminal 15, and a second terminal 16. The lightning protection module 20 includes a varistor 21, an upper electrode 22 arranged on the varistor 21 and connected to the static contact 13, a lower electrode 23 arranged on the varistor 21 and connected to the static contact 13, and a middle electrode 24 arranged on the varistor 21 and connected to the second terminal 16. A current transformer 17 is provided at a side corresponding to the first terminal 15 in the housing 10. The first terminal 15 has a conductive sheet 151 inserted into the current transformer 17, and a soft connection 152 is connected between the conductive sheet 151 and the moving contact 12. A microswitch 18 is provided within the housing 10 on the side corresponding to the moving contact 12. A clamping plate 121 is provided on the moving contact 12 to cooperate with the microswitch 18. The clamping plate 121 moves with the moving contact 12 and triggers the microswitch 18, turning the microswitch 18 on or off. A signal terminal 19 is provided on the housing 10, electrically connected to the microswitch 18. The microswitch can monitor the position of the moving contact, and the signal terminal can send the monitoring signal of the microswitch to the backend, thereby improving the operating reliability of the surge protector.

[0015] like Figure 2 、 3 As shown, the static contact 13 is provided with a snap-fit portion 131 at each end that mates with the housing 10. A snap-fitting slot 101 is provided within the housing 10 that mates with the snap-fit portion 131. The snap-fitting portion 131 snaps into the snap-fitting slot 101, forming a snap-fitting connection between the static contact 13 and the housing 10. This snap-fitting assembly of the static contact and the housing facilitates assembly and improves assembly efficiency. A positioning slot 102 is provided within the housing 10 that mates with the electromagnetic release 14. The electromagnetic release 14 snaps into the positioning slot 102, and a shielding cover 141 covers the electromagnetic release 14. The electromagnetic release snaps into the positioning slot of the housing, facilitating assembly of the electromagnetic release and the housing. The shielding cover also shields interference signals, thereby improving the operational reliability of the surge protector.

[0016] like Figure 1 、 3As shown, the housing 10 houses a reset plate 100 that interlocks with the top rod 142 of the electromagnetic release 14. The bracket 111 of the operating mechanism 11 is provided with an arc-shaped raised portion 112 that abuts against one side of the reset plate 100. The bracket of the operating mechanism drives the reset plate via the arc-shaped raised portion, thereby ensuring more reliable transmission between the bracket and the reset plate. A positioning hole 1001 is provided on one end of the reset plate 100. A positioning rod 103 is provided within the housing 10, which extends through the positioning hole 1001. A protrusion 1002 is provided on the other side of the other end of the reset plate 100, which abuts against the top rod 142 of the electromagnetic release 14. The reset plate is rotatably mounted on the positioning rod within the housing, facilitating assembly of the reset plate with the housing and ensuring reliable operation. The reset plate engages with the top rod of the electromagnetic release via the protrusion, thereby ensuring more reliable transmission between the reset plate and the electromagnetic release.

[0017] The lightning protection module provides lightning protection, preventing damage to equipment caused by voltage surges due to grid operations or other external factors, providing enhanced safety. Furthermore, the current transformer monitors short-circuit currents. When a short circuit occurs, the current transformer detects the short-circuit current, triggering the electromagnetic release and triggering the operating mechanism's bracket, causing it to trip and open, thus achieving the surge protector's short-circuit protection function. This results in a surge protector with the advantages of a simple structure, stable and reliable performance, easy assembly, and safe and reliable short-circuit protection.

Claims

1. A surge protector with short-circuit current protection, comprising a housing, an operating mechanism disposed within the housing, a movable contact cooperating with the operating mechanism, a stationary contact cooperating with the movable contact, an electromagnetic release, a lightning protection module, a first terminal, and a second terminal, characterized in that: The lightning protection module includes a varistor, an upper electrode arranged on the varistor and connected to the static contact, a lower electrode arranged on the varistor and connected to the static contact, and a middle electrode arranged on the varistor and connected to the second terminal. A current transformer is arranged on the side corresponding to the first terminal in the shell. The first terminal has a conductive sheet inserted into the current transformer, and a soft connection is connected between the conductive sheet and the moving contact.

2. The surge protector with short-circuit current protection function according to claim 1, characterized in that: A micro switch is provided at one side of the moving contact in the shell, and a clamping plate that cooperates with the micro switch is provided on the moving contact. The clamping plate moves with the moving contact and triggers the micro switch to realize the connection or disconnection of the micro switch. A signal terminal electrically connected to the micro switch is provided on the shell.

3. The surge protector with short-circuit current protection function according to claim 1 or 2, characterized in that: The two ends of the static contact are respectively provided with a clamping part that matches the housing, and a clamping groove that matches the clamping part is provided in the housing. The clamping part is clamped in the clamping groove to form a clamping fit between the static contact and the housing.

4. The surge protector with short-circuit current protection function according to claim 1 or 2, characterized in that: A positioning groove matched with the electromagnetic release is provided in the shell, the electromagnetic release is clamped in the positioning groove, and the electromagnetic release is covered with a shielding cover.

5. The surge protector with short-circuit current protection function according to claim 1 or 2, characterized in that: A reset plate that cooperates with the top rod of the electromagnetic release is arranged in the shell, and an arc-shaped protrusion that abuts against one side of the reset plate is arranged on the bracket of the operating mechanism.

6. The surge protector with short-circuit current protection function according to claim 5, characterized in that: A positioning hole is provided on one end of the reset plate, a positioning rod inserted into the positioning hole is provided in the shell, and a protrusion that abuts against the top rod of the electromagnetic release is provided on the other side of the other end of the reset plate.

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