Small LED street lamp surge protector with overcurrent protection and circuit

Abstract

The utility model discloses a miniature LED street lamp surge protector with overcurrent protection and a circuit, comprising a discharge tube, a piezoresistor, a fuse and a work indicating lamp, one end of the fuse is electrically connected with a live wire, the other end of the fuse is electrically connected with the end of the piezoresistor, and the discharge tube is electrically connected with the work indicating lamp. One end of the voltage dependent resistor is electrically connected with the live wire, the other end of the voltage dependent resistor is electrically connected with the zero wire and the discharge tube, the voltage dependent resistor is bridged between the live wire and the zero wire, the discharge tube is bridged between the zero wire and the ground wire, and the work indicating lamp is connected in parallel between the live wire and the zero wire and is connected in parallel with the voltage dependent resistor. According to the utility model, a flat small-sized surge protector is designed, and the product is provided with a current overload and overtemperature tripping protection dual-protection device, so that abnormal large current in a working loop can be cut off, and the internal temperature can be sensed to cut off the loop, thereby preventing fire accidents caused by surge; in: 3kA / Imax: 6kA surge current can pass through the device.

Description

Technical Field

[0001] The utility model relates to the technical field of LED street lamp lightning protection, in particular to a small LED street lamp surge protector with overcurrent protection and a circuit. Background Art

[0002] Since LED lighting fixtures cannot be used directly on 220V or 380V AC power, they must first be stepped down. Equipment directly connected to the AC power supply may be damaged by short circuits and overload conditions caused by internal components or circuit failures in the bulb. In addition, lightning surges or load switching transients can cause voltage spikes or ring waves, which stress components and eventually cause damage, thus rendering the fixture scrapped. Given that the value proposition of LED bulbs is not only reduced energy consumption, but also longer service life, it will be crucial to consider transient voltage protection in eliminating field failures caused by electrical environments.

[0003] The size of outdoor and commercial LED lighting equipment is becoming increasingly smaller and flatter, and the requirements for the size of surge protection devices (SPD) to protect lighting equipment are also getting smaller and smaller. The outer dimensions of general lighting equipment surge protectors are limited by the size of lightning protection components and are designed to be relatively high, which is unacceptable for lamps with limited installation space. However, considering the operational safety issues of surge protection itself, to prevent fires caused by surge protectors, current products are generally temperature tripping protection devices. Therefore, it is urgent to design a small LED street light surge protector and circuit with overcurrent protection to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a small LED street lamp surge protector and circuit with overcurrent protection to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A small LED street light surge protector and circuit with overcurrent protection, a small LED street light surge protection circuit with overcurrent protection, including a discharge tube, a varistor, a fuse and a working indicator light, one end of the fuse is electrically connected to the live wire, and the other end of the fuse is electrically connected to the end of the varistor, the other end of the varistor is electrically connected to the neutral wire and the discharge tube respectively, the varistor is bridged between the live wire and the neutral wire, the discharge tube is bridged between the neutral wire and the ground wire, the working indicator light is connected in parallel between the live wire and the neutral wire, and the working indicator light is connected in parallel with the varistor.

[0007] Preferably, the fuse has overload and over-temperature protection, a rated working current of 5A, a rated operating temperature of 100°C to 160°C, and can pass a surge current of In:3kA / Imax:6kA.

[0008] Preferably, the working indicator light is composed of a diode D1, a light emitting diode LED and a current limiting resistor R connected in series.

[0009] A small LED street light surge protector with overcurrent protection comprises a shell, wherein the discharge tube, the varistor, the fuse and the working indicator light are respectively fixedly mounted on the inner wall at the bottom of the shell, an upper cover is arranged on the top of the shell, and a plurality of lead wires penetrating to the outside of the upper cover are arranged inside the shell.

[0010] Preferably, a card slot is provided on the inner edge of the top of the shell, and a protrusion matching with the card slot is provided on the bottom of the upper cover.

[0011] Preferably, a plurality of screw holes are arranged on the outer wall of the top of the upper cover, and a plurality of screw fixing columns corresponding to the positions of the screw holes are arranged on the inner wall of the bottom of the outer shell.

[0012] In the above technical solution, the utility model provides a small LED street lamp surge protector and circuit with overcurrent protection, and the beneficial effects are:

[0013] The utility model designs a flat small-sized surge protector with a height of only 12mm and an outer size of 49*29*12mm in length, width and height. It is convenient to be installed inside an LED lamp. The surge protector is connected to the lamp with three soft cables respectively. A working indicator light is designed at the bottom of the shell to judge the working state of the surge protector. The product is designed with a dual protection device of current overload and over-temperature tripping protection, which can cut off abnormal large current in the working circuit and can also sense the internal temperature and cut off the circuit, thereby preventing fire accidents caused by the surge itself. The surge current fuse (Ft) connected in series on the main circuit has overload and over-temperature protection, with a rated working current of 5A and a rated operating temperature of 100℃~160℃, and can pass a surge current of In:3kA / Imax:6kA. The circuit has a failure indication function, and can realize a photoelectric warning in insufficient light or a higher installation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1The utility model provides a structural schematic diagram of a small LED street lamp surge protector with overcurrent protection and a circuit embodiment.

[0016] Figure 2 A schematic diagram of the internal structure of a surge protector is provided for a small LED street lamp surge protector with overcurrent protection and a circuit embodiment of the utility model.

[0017] Figure 3 A surge protection circuit and an indicating circuit diagram are provided for a small LED street lamp surge protector with overcurrent protection and a circuit embodiment of the utility model.

[0018] Figure 4 A surge protection circuit diagram is provided for a small LED street lamp surge protector with overcurrent protection and a circuit embodiment of the utility model.

[0019] 1. Shell, 2. Upper cover, 3. Lead wires, 4. Screw holes, 5. Working indicator lights, 6. Screw fixing columns, 7. Discharge tubes, 8. Varistors, 9. Fuse. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 3-4 As shown, a small LED street lamp surge protection circuit with overcurrent protection provided by an embodiment of the utility model includes a discharge tube 7, a varistor 8, a fuse 9 and a working indicator light 5, one end of the fuse 9 is electrically connected to the live wire, and the other end of the fuse 9 is electrically connected to the end of the varistor 8, the other end of the varistor 8 is electrically connected to the neutral wire and the discharge tube 7 respectively, the varistor 8 is bridged between the live wire and the neutral wire to play a differential mode protection, the discharge tube 7 is bridged between the neutral wire and the ground wire to play a common mode protection, the working indicator light 5 is connected in parallel between the live wire and the neutral wire, and the working indicator light 5 is connected in parallel with the varistor 8, and the working indicator light 5 will go out after the main circuit fuse 9 is actuated (the indication circuit can be set according to customer needs).

[0022] In one embodiment provided by the utility model, the fuse 9 has overload and over-temperature protection, a rated working current of 5A, a rated operating temperature of 100°C~160°C, and can pass a surge current of In:3kA / Imax:6kA.

[0023] As another embodiment provided by the utility model, the working indicator light 5 is composed of a diode D1, a light emitting diode LED and a current limiting resistor R connected in series, and the working indicator light 5 is used to judge the working state of the surge protector.

[0024] like Figure 1-2A small LED street light surge protector with overcurrent protection is shown, comprising a shell 1. The shell 1 is designed as a flat structure with a height of only 12 mm and an outer size of 49*29*12 mm in length, width and height, which is convenient for installation inside an LED lamp. A discharge tube 7, a varistor 8, a fuse 9 and a working indicator light 5 are respectively fixedly mounted on the inner wall at the bottom of the shell 1. An upper cover 2 is provided on the top of the shell 1. Several lead wires 3 that penetrate to the outside of the upper cover 2 are provided inside the shell 1. The three lead wires are used to realize the connection between the surge protector and the lamp.

[0025] As an embodiment provided by the utility model, a card slot is provided on the inner edge of the top of the shell 1, and a protrusion matching the card slot is provided on the bottom of the upper cover 2. The protrusion below the upper cover 2 is connected with the card slot at the top of the shell 1, thereby ensuring the stability of the installation between the upper cover 2 and the shell 1 and making the shell 1 and the upper cover 2 fit better.

[0026] In another embodiment provided by the utility model, a plurality of screw holes 4 are provided on the outer wall at the top of the upper cover 2, and a plurality of screw fixing columns 6 corresponding to the positions of the screw holes 4 are provided on the inner wall at the bottom of the outer shell 1. After the upper cover 2 is buckled on the top of the outer shell 1, the operator inserts the screws into the screw holes 4 and allows the screws to enter the screw fixing columns 6, and tightens the screws, so as to quickly realize the disassembly and assembly of the upper cover 2 on the outer shell 1.

[0027] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A small LED street lamp surge protection circuit with overcurrent protection, characterized in that: The invention comprises a discharge tube (7), a varistor (8), a fuse (9) and a working indicator light (5), wherein one end of the fuse (9) is electrically connected to the live wire, and the other end of the fuse (9) is electrically connected to the end of the varistor (8), and the other end of the varistor (8) is electrically connected to the neutral wire and the discharge tube (7) respectively, the varistor (8) is bridged between the live wire and the neutral wire, the discharge tube (7) is bridged between the neutral wire and the ground wire, the working indicator light (5) is connected in parallel between the live wire and the neutral wire, and the working indicator light (5) is connected in parallel with the varistor (8).

2. A small LED street lamp surge protection circuit with overcurrent protection according to claim 1, characterized in that: The fuse (9) has overload and over-temperature protection, a rated working current of 5A, a rated operating temperature of 100°C to 160°C, and can pass a surge current of In: 3kA / Imax: 6kA.

3. A small LED street lamp surge protection circuit with overcurrent protection according to claim 1, characterized in that: The working indicator light (5) is composed of a diode D1, a light-emitting diode LED and a current-limiting resistor R connected in series.

4. A small LED street lamp surge protector with overcurrent protection, comprising a small LED street lamp surge protection circuit with overcurrent protection as claimed in any one of claims 1 to 3, characterized in that: The invention comprises a housing (1), wherein the discharge tube (7), the varistor (8), the fuse (9) and the working indicator light (5) are respectively fixedly mounted on the inner wall at the bottom of the housing (1), an upper cover (2) is arranged on the top of the housing (1), and a plurality of lead wires (3) are arranged inside the housing (1) and penetrate to the outside of the upper cover (2).

5. A small LED street light surge protector with overcurrent protection according to claim 4, characterized in that: The top inner edge of the housing (1) is provided with a slot, and the bottom of the upper cover (2) is provided with a protrusion matching the slot.

6. A small LED street light surge protector with overcurrent protection according to claim 4, characterized in that: A plurality of screw holes (4) are arranged on the outer wall of the top of the upper cover (2), and a plurality of screw fixing columns (6) corresponding to the positions of the screw holes (4) are arranged on the inner wall of the bottom of the outer shell (1).

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