CN204391743U - Surge protector - Google Patents

Abstract

The utility model discloses a surge protector, which comprises: two ends of a parallel branch composed of a three-pole discharge tube V1 and a two-pole discharge tube V2 are respectively connected to one end of a resistor R1 and one end of a resistor R2, and the other end of a resistor R1 and a resistor R2 One end is respectively connected to the two ends of the electrostatic protector T1, and the central electrode of the triode discharge tube V1 is grounded. The utility model can prevent the equipment from being damaged by the overvoltage and surge current generated by the induced lightning strike and the overvoltage and surge current generated inside the system without affecting the signal transmission performance.

Description

surge protector

technical field

The utility model relates to the communication field, in particular to a surge protector for high-speed Ethernet transmission.

Background technique

There are many harmonic filtering products in the field of communication, which are used to protect the power system from external interference and maintain a good circuit system, but the problem is that the main high-frequency harmonic interference (90%) is generated by the equipment itself, which is generated by the equipment The interference power generated by itself will interfere with each other, impact and damage the equipment, resulting in increased power consumption, reduced equipment efficiency, and frequent failures, thereby increasing costs, and the main circuit protection cannot prevent these damages. In addition, at present, many surge protectors that protect Ethernet signal transmission can only reach a maximum transmission speed of 100M due to factors such as design and selection, but cannot meet the requirements of Gigabit transmission speed required by high-end equipment, and surge protectors in the high-frequency band Large distributed capacitance and other phenomena appear, resulting in increased network insertion loss, signal attenuation, affecting network transmission, and cannot meet the needs of daily work.

Utility model content

The utility model aims to provide a surge protector with more optimized network performance and parameters, which can protect the equipment from overvoltage, surge current, and internal system damage caused by induced lightning strikes while ensuring network transmission speed and accuracy. Damage caused by overvoltage and surge current.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

The surge protector disclosed in the utility model comprises: the two ends of the parallel branch composed of the three-pole discharge tube V1 and the two-pole discharge tube V2 are respectively connected to one end of the resistance R1 and the resistance R2, and the resistance R1 and the resistance R2 are connected to each other. The other end is respectively connected to the two ends of the electrostatic protector T1, and the central electrode of the triode discharge tube V1 is grounded.

In the utility model, a two-pole discharge tube is connected in parallel to the three-pole discharge tube, which can better discharge the overvoltage and overcurrent between the lines, so as to better ensure the signal transmission between the lines.

Further, one end of the resistor R1 and the resistor R2 are respectively connected to the two pins of the connector J1, and the other ends of the resistor R1 and the resistor R2 are respectively connected to the two pins of the connector J2, and the connector J1 , The shell of the connector J2 is grounded.

Preferably, both the connectors J1 and J2 are RJ45 connectors.

Preferably, the electrostatic protector is SLVU2.8-4ESD, the breakdown voltage of the triode discharge tube V1 is 75V, and the breakdown voltage of the diode discharge tube V2 is 90V.

The utility model can better protect the equipment from the overvoltage and surge current generated by the induced lightning strike, and the damage caused by the overvoltage and surge current generated inside the system without affecting the signal transmission performance.

Description of drawings

Fig. 1 is the circuit schematic diagram of the utility model.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the surge protector disclosed by the utility model includes: the two ends of the parallel branch formed by the three-pole discharge tube V1 and the two-pole discharge tube V2 are respectively connected to one end of the resistor R1 and the resistor R2, and the resistor R1 1. The other end of the resistor R2 is respectively connected to the two ends of the electrostatic protector T1, and the central electrode of the triode discharge tube V1 is grounded; one end of the resistor R1 and the resistor R2 are respectively connected to the two pins of the connector J1, and the resistors R1, The other end of the resistor R2 is respectively connected to the two pins of the connector J2. The shells of the connector J1 and the connector J2 are grounded. Both the connector J1 and the connector J2 use RJ45 connectors. When in use, the connectors J1 is connected to signal input, and connector J2 is connected to signal output.

Further, the triode discharge tubes V3, V5, V7, the diode discharge tubes V4, V6, V8, the resistors R3 and R4, the resistors R5 and R6, the resistors R7 and R8, and the electrostatic protectors T2, T3, and T4 respectively constitute three One-way surge protectors, integrated together, are suitable for surge protection of 4-way signals. For surge protection of Ethernet Gigabit signals, triode discharge tubes V1, V3, V5, and V7 all use 75V breakdown voltage The gas discharge tube and the diode discharge tube V2 are all gas discharge tubes with a breakdown voltage of 90V. The resistance values of the resistors R1, R2, R3, R4, R5, R6, R7, and R8 are all 2.2Ω, and the power is 1W. The electrostatic protector is SLVU2.8-4ESD, and the electrostatic protectors T1, T2, T3, and T4 can be a unit of SLVU2.8-4ESD respectively.

The devices used in the utility model are all protective devices, which are in a high-impedance state under normal conditions. Because the extremely low distributed capacitance usually does not affect signal transmission, only when the line induces lightning current or high voltage, the ns-level response speed of the device Drains the surge current quickly to ground while clamping the voltage to a lower voltage range. Its key advantage is that after the combined use of the devices, it can be used for a long time after the test, all 4 pairs of signal line transmission are protected, the starting voltage is lower, the distributed capacitance is greatly reduced, the signal transmission is not affected, and it can withstand the test of the lightning strike test, suitable for 100M Or 1000M network transmission.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (4)

1. a Surge Protector; it is characterized in that; comprise: the two ends difference contact resistance R1 of the parallel branch be made up of electrode surge arrester V1 and two pole discharge tube V2, one end of resistance R2; the other end of described resistance R1, resistance R2 connects the two ends of electrostatic protector T1 respectively, the contre electrode ground connection of described electrode surge arrester V1.

2. Surge Protector according to claim 1; it is characterized in that: one end of described resistance R1, resistance R2 connects two pins of plug connector J1 respectively; the other end of resistance R1, resistance R2 connects two pins of plug connector J2, the earthing of casing of described plug connector J1, plug connector J2 respectively.

3. Surge Protector according to claim 2, is characterized in that: described plug connector J1, plug connector J2 are shield type RJ45 binding post or Fast Ethernet RJ45 splicing ear.

4. Surge Protector according to claim 1, is characterized in that: described electrostatic protector is SLVU2.8-4ESD, and the puncture voltage of described electrode surge arrester V1 is 75V, and the puncture voltage of two pole discharge tube V2 is 90V.