CN2862465Y - Remote control signal surge protector - Google Patents

Abstract

A protector against remote signal electric surging, including a housing, signal input terminals, signal output terminals, circuit board and control switches. It is characterized in that the electric surging protector is connected in series between signal SPD and the equipment; the control switch adopts remote control switch; a circuit board is mounted inside the housing; the housing is provided with a hanging panel and an earth connecting screw rod leading to the earth via an earth wire. The circuit board consisting of a luminous discharge tube, a transient suppressing diode and a spring-return fuse; its circuit connection adopts trio-level guard circuit; the luminous discharge tube is connected to the signal input end; the spring-return fuse is connected in series to a signal wire; a third-level transient suppressing diode is connected next to the spring-return fuse; crew in the control room can switch on or switch off the device based on practical needs through sending remote control signals to the switch, thus achieving the purpose of device protection.

Description

Remote Signal Surge Protector

technical field

The utility model relates to a lightning protection protector installed on a signal line, in particular to a remote control signal surge protector.

Background technique

Our country has a vast land, and there are many thunderstorm days. In some areas in the south, the annual thunderstorm days are as high as 100-130 days. The number of lightning currents transmitted through signal lines every year is astonishing, which has brought serious losses to national property. In order to reduce the harm of lightning strikes, people use signal surge protectors in signal transmission lines to reduce the harm caused by lightning to a certain extent. However, traditional signal surge protectors often encounter such problems in actual work, such as: after the signal surge protector is installed, the protector is damaged or the electronic equipment working in the field is struck by strong lightning, exceeding the protector Equipment protected by surge protectors on the line will also be damaged when the withstand capacity of the surge protector is used.

Under the new situation of continuous innovation of world communication technology, there are more and more signal devices working in the field, so more protection is required accordingly. The lightning protection industry at home and abroad is developing more intelligent and more functional signal lightning protection products. In order to solve the problem of switching offices, data offices, module offices, access sites, ID sites, mobile communication base stations, satellite earth stations, microwave stations, etc. due to lightning induction through network data lines, signal lines, remote control systems, and monitoring To protect the system from lightning hazards, our company has newly researched and developed a signal surge protector (SPD for short) that can be remotely controlled. The outline structure is shown in Figure 1. The remote control signal SPD can realize the lightning protection device of the remote control equipment. While ensuring the safety and normal operation of the signal transmission equipment, it can reduce the input of manpower and material resources, meet the needs of the protection equipment, and adapt to the rapid development of the times. Through the research and investigation of similar products at home and abroad, it is found that although surge protectors have been used for many years, there is no remote control signal SPD for lightning protection of signal equipment in China. There is no relevant standard, and it is of great significance for us to research and develop such products.

Contents of the invention

Aiming at the lightning protection situation of the current equipment, the inventor designed a remote control signal surge protector, which is installed in the protection system of the line to protect the signal circuit and limit the overcurrent and overvoltage induced by lightning or lightning strikes on the affected protection system impact.

The utility model is achieved in that:

A remote signal surge protector, including a shell, a signal input terminal, a signal output terminal, a circuit board, and a control switch, is characterized in that: the surge protector is connected in series between the signal SPD and the device, and the control switch adopts a remote control switch , the circuit board is installed in the casing, the casing is provided with a hanging plate, and a ground screw is introduced into the earth through the ground wire. The circuit board is composed of a gas discharge tube, a transient suppression diode, and a resettable fuse. The circuit connection method adopts three Level protection circuit, the gas discharge tube is connected to the signal input terminal to discharge transient overcurrent, the resettable fuse is connected in series with the signal line as the second level current limiting circuit, and the third level transient suppression diode is connected to the self- After resetting the fuse, it is used to clamp the limit voltage.

In the above-mentioned circuit board circuit, when there are multiple signal lines, there may be several gas discharge tubes, and there are also several transient suppression diodes and resettable fuses PTC, and one end of the gas discharge tube is connected to the input of the signal line One end, the other end is grounded, the self-resetting fuse PTC is connected in series with the signal line, the other end of the self-resetting fuse PTC is connected to two transient suppression diodes (one end of the diode is grounded; the other is connected between the signal lines), and finally the signal line output.

The remote control part of the remote control signal surge protector adopts a controllable remote switch, which is connected in series between the signal SPD and the equipment. The staff in the control room send control signals to open and close the remote switch according to the actual situation. Open or switch on the equipment, so as to achieve the purpose of protecting the equipment. At the same time, in order to ensure that the control part can work around the clock, we have installed a lightning protection device in the control circuit to achieve all-round protection.

This product is used to disconnect the communication between the equipment and the control room through the remote control signal when the electronic equipment does not need to work or when lightning strikes may occur, temporarily disconnecting the equipment from the line, and has the protective effect of blocking lightning overcurrent and overvoltage.

The specific working process of this remote control signal surge protector is: when the transient overcurrent is transmitted to the protection circuit along each signal line or control line, as the lightning current increases, the PTC heats up rapidly, and the resistance value increases to suppress the transient Overcurrent passes through; at the same time, the voltage drop across the gas discharge tube increases, prompting the gas discharge tube to reach the discharge voltage value, the gas discharge tube in the SPD operates, and most of the induced current is released to the ground through the discharge circuit to protect other element. The action time of the transient suppression diode is extremely short, which can limit the voltage difference between the lines and the ground caused by the lightning current within a certain range, and can play a good role in clamping and limiting the voltage to ensure that the equipment will not be damaged.

The remote control part adopts a controllable switch, which is connected in series between the signal SPD and the equipment. According to the needs of the actual situation, the staff in the control room can disconnect or connect the equipment by sending the control signal to open and close the remote control switch, so as to achieve purpose of protecting equipment.

The working principle of the utility model is as follows:

The surge protector SPD can temporarily disconnect the communication between the equipment and the control room through the remote control signal when the electronic equipment does not need to work or a lightning strike may occur, and isolate the equipment from the line, which is not affected by abnormal conditions in the line, and is better The protection of various signal equipment. For example: the runway of an airport is 5 kilometers long, and the control room is in the middle of the runway. There will be many equipment for guiding aircraft to take off and land at both ends of the runway and along the runway. Through the installation of remote signal surge protectors, various signals can be guaranteed. The equipment is not harmed by surge overcurrent and overvoltage, and it can also realize remote control of various signal equipment. When there is no need for aircraft navigation or severe thunderstorms, the remote control signal surge protector sends a control signal from the airport control room, cuts off the connection with various navigation equipment, and separates the equipment from the line to prevent lightning strikes or induction. The overcurrent and overvoltage spread in the line and invade all kinds of equipment on the line, reducing the possibility of electronic and electrical equipment being damaged by lightning and other conditions. After the lightning strike or when the equipment needs to be used, a control command is issued from the control room to connect the equipment to the line and resume the operation of the equipment.

The product of this utility model refers to the existing technical level in China and the needs of the lightning protection market in this field. This kind of lightning protection product is developed and installed in the protection system of the line to protect the signal circuit and limit the lightning or lightning induction. Effects of overcurrent and overvoltage on the protected system. This product is used to disconnect the communication between the equipment and the control room through the remote control signal when the electronic equipment does not need to work or when lightning strikes may occur, temporarily disconnecting the equipment from the line, and has the protective effect of blocking lightning overcurrent and overvoltage. It is suitable for airport control lines, radar control lines, equipment information transmission lines, measuring instrument lines, meteorological observation lines, computer communication network signal lines, closed-circuit television monitoring system signal transmission and other signal lines.

Description of drawings

Figure 1 is the external structure diagram of the remote control signal surge protector SPD;

Fig. 2 is a circuit structure diagram of the remote control signal surge protector SPD;

Figure 3 is a schematic diagram of the control of the remote signal surge protector SPD.

Detailed ways

As shown in Figure 1, the remote control signal surge protector has a housing 3, a signal input terminal 8, a remote control switch signal input terminal 7, a signal output terminal 6, and a control switch 4. The circuit board 1 is installed in the housing 3, and the housing 3 is provided with Hanging plate, and grounding screw rod 2 is introduced into the earth by grounding wire.

As shown in Figure 2, the circuit of the remote control signal surge protector is composed of a gas discharge tube 9, a transient suppression diode 11, and a resettable fuse PTC 10. The circuit connection method adopts a three-level protection circuit, and the gas discharge tube 9 is connected to the signal The input terminal is used to release transient overcurrent, and the resettable fuse PTC 10 is connected in series with the signal line as the second-stage current limiting circuit, and the third-stage transient suppression diode 11 is connected after the resettable fuse PTC 10 for use The clamp limits the voltage. When signal line has multiple paths (Fig. 2 circuit diagram), gas discharge tube 9 can have several, transient suppression diode 11, resettable fuse PCT also has several, gas discharge tube 9 is connected to the input end of two signal lines, One end of the resettable fuse PTC 10 is connected in parallel with the gas discharge tube 9, and then connected in series on the signal line, and the other end of the resettable fuse PTC 10 is connected with two transient suppression diodes 11, and finally connected with the output end of the signal line.

Figure 3 shows the control principle of the remote signal surge protector. The remote part adopts a controllable remote switch 12, which is connected in series between the signal SPD and the device 12. The staff in the control room send control signals to remotely control The opening and closing of the switch 12 is used to disconnect or connect the equipment, so as to achieve the purpose of protecting the equipment.

Claims (2)

1; a kind of remote signal surge protector; comprise shell; signal input terminal; signal output terminal and circuit board; control switch; it is characterized in that: this surge protector is connected between signal SPD and the equipment; control switch adopts the remote control control switch; circuit board is installed in the enclosure; shell is provided with link plate; and there is grounding screw rod to introduce the earth by ground wire; described circuit board is by gas discharge tube (9); Transient Suppression Diode; self-healing fuse is formed; its circuit connecting mode adopts the three-level protective circuit; gas discharge tube (9) is connected on signal input part; self-healing fuse (10) is connected on the holding wire, and the Transient Suppression Diode 11 of the third level is connected on self-healing fuse (10) afterwards.

2, remote signal surge protector according to claim 1; it is characterized in that: gas discharge tube and Transient Suppression Diode, self-healing fuse PCT are provided with several in the circuit board of multiple signals line; gas discharge tube (9) is connected on the input of two holding wires; self-healing fuse (10) one ends are in parallel with gas discharge tube (9); be connected on the holding wire again; self-healing fuse (10) two Transient Suppression Diodes of another termination (11) connect the holding wire output at last.

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