KR101369856B1 - Hybrid surge protective device joined to network equipment with power over ethernet - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surge protector connected to a network equipment having a Power over Ethernet (PoE), in particular a surge protector to which a hybrid surge protection technology is applied.
The surge protector of the present invention includes a line terminal 110 connected to a cable drawn from a user equipment terminal, a first overvoltage protection unit 130 for blocking a first surge voltage coming from the line terminal 110 and a surge voltage. An over-current protection unit 140 for limiting the over-current, and the second over-voltage protection unit to block the surge voltage smaller than the first surge voltage, the internal resistance is smaller than the first over voltage protection unit 130 and the reaction rate is faster And a device-side terminal 120 connected to the network equipment and receiving power and data from the network equipment, and simultaneously protecting the power supply portion and the communication portion of the network equipment from a surge voltage. do.

Description

HYBRID SURGE PROTECTIVE DEVICE JOINED TO NETWORK EQUIPMENT WITH POWER OVER ETHERNET}

The present invention relates to a surge protector, and more particularly, to a surge protector for Power over Ethernet (PoE) network equipment.

Surge refers to the abnormal voltages and currents flowing into power lines, communication lines, and signal lines of all power systems. It also occurs when a system breakdown such as a power failure or opening / closing of driving equipment when driving various electronic and communication equipment. In general, when a surge of 500V or higher is applied to an AC 120V device, the device may be deteriorated or damaged, and a computer system operated with a power supply of DC 50V or less may be damaged or damaged by a device when a surge of 50V or more is penetrated. do.

This surge causes a lot of damage. Damage to I / O cards of various communication equipments, LAN cards and IC chips of network equipments may damage the devices. This results in the loss of important data. In addition, surges in the power system can damage power supply equipment and cause system failure. In addition, if damage is caused by surges, it must be repaired urgently, and the economic loss caused by such repair and repair is also great.

Since the damage from surges is very large, various types of surge protectors are used. Conventional surge protectors have been used for the purpose of protecting communication lines or for power protection. That is, the surge protector for communication line and the surge protector for power protection are distinguished. Surge protectors were mounted as separate protectors at the communication and power terminals respectively. However, the terminal equipment could be protected, but the network equipment was not effectively protected from the surge.

The inventor of the present invention solved the problems of the prior art and developed the means for solving the problems of the prior art.

An object of the present invention is to propose a surge protector for protecting network equipment from surges. The surge protector of the present invention simultaneously protects communication and power from surges, and is intended to protect a system by connecting to a PoE (Power over Ethernet) switch.

In addition, another object of the present invention is not to install a surge protector individually in a power supply terminal or a communication terminal, it is not necessary to perform a separate installation work or to secure a use space by integrally connected to the PoE switch installation, By ensuring installation work, the initial installation costs are lowered and maintenance costs are reduced. That is, the present invention focuses on protecting surges while operating the current system environment as it is.

Further, another object of the present invention is to provide a surge protector incorporating various sources of surge. Surge occurs for a variety of causes, characterized by a very large variation in the causes. For example, since the surge caused by lightning strike and the surge caused by opening and closing of the breaker are different, the configuration of the protection circuit is inevitably different. Among these surge voltages, relatively fast surges and slower surges may be introduced. The surge protector of the present invention allows to sufficiently cope with these various types of surges.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

The present invention to achieve the above object

As a surge protector connected to network equipment with Power over Ethernet (PoE):

A line terminal connected with a cable drawn from the user equipment terminal;

A first overvoltage protection unit for blocking a first surge voltage coming from the line terminal;

An overcurrent protection unit for limiting an overcurrent of the surge voltage;

A second overvoltage protection unit which cuts out a surge voltage which is drawn faster than the first surge voltage and which has a smaller internal capacity than the first overvoltage protection unit but has a faster reaction speed; And

It is connected to the network equipment, the equipment-side terminal receiving power from the network equipment; includes, characterized in that simultaneously protecting the power supply portion and the communication portion of the network equipment from the surge voltage.

In addition, in one embodiment of the integrated hybrid surge protector for network equipment having an Ethernet power supply of the present invention, the apparatus may further include a PoE detector for detecting the type of PoE switch equipment connected to the terminal and the cable.

In addition, in one embodiment of the integrated hybrid surge protector for network equipment having an Ethernet power supply of the present invention, the overvoltage protection device of the second overvoltage protection unit is mounted on a separate PCB, so that the separate PCB is detachably mounted to the main PCB. This can ensure replacement of the overvoltage protection device.

In addition, in one embodiment of the integrated hybrid surge protector for network equipment having an Ethernet power supply of the present invention, the line terminal is the rear portion or front portion of the surge protector housing, the equipment side terminal is the front portion of the surge protector housing or Is installed in the rear part,

The first overvoltage protection unit, the overcurrent protection unit and the second overvoltage protection unit may be separately provided for each terminal port.

In addition, in one embodiment of the integrated hybrid surge protector for network equipment having an Ethernet power supply of the present invention, an LED may be provided for each terminal port of the rear portion or the front portion of the surge protector housing.

According to the present invention as described above, since the surge protector of the present invention can be easily connected to the network in which the PoE switch is installed by a PoE switch and a cable with a port-to-port type, the installation is very easy. With this simple installation, the power and communication of network equipment can be protected from surge voltage. In particular, by implementing a multi-stage countermeasure against the surge voltage of the hybrid type, the fast surge voltage, which is introduced before the conventional arrestor starts discharging the surge voltage, is absorbed by the overvoltage protection part using a separate semiconductor element to the ground part. This is an excellent advantage to protect the entire circuit more safely.

In addition, the second overvoltage protection device that can be fired by the inflow of the surge voltage has an advantage that the surge protector can be more economically and effectively managed by being configured to be easily replaced.

In addition, according to the present invention, by detecting various types of PoE switch, the surge protector actively discriminates the PoE switch to set itself, thereby increasing the efficiency of equipment operation.

Even if effects not specifically mentioned in the specification of the present invention are incorporated, the provisional effects expected by the technical features of the present invention are treated as described in the specification of the present invention.

1 exemplarily shows an installation position in a network of a surge protector 100 according to the present invention.
2 is a diagram showing an example of a front or rear housing configuration in which a port 119 connected to a PoE switch and a cable of the surge protector 100 of the present invention is installed.
3 is a view showing the internal configuration of the surge protector 100 according to an embodiment of the present invention.
FIG. 4 is a configuration example of a second overvoltage protection unit 150 according to an embodiment of the present invention. FIG. ) Denotes the second overvoltage protection device PCB 155.
It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

1 schematically illustrates a network configuration in which the surge protector 100 of the present invention is installed. Power over Ethernet (PoE) switch 200 is installed between the network equipment and the user terminal (10, 20). The PoE switch 200 is widely used because it can provide flexibility to the network because it can send data and power to one Ethernet cable at the same time. The network may be connected to various networks such as an exchange network, a defense computer network, and a telephone network in which security equipment is built. The surge protector 100 of the present invention is directly connected to the PoE switch 200. The PoE switch 200 has an inlet cable and an outgoing cable, which removes the outgoing cable and instead connects the ports of the PoE switch 200 with the ports of the surge protector 100 in a one-to-one cable, so that the surge protector 100 Can be installed. By connecting the outgoing cable connected to the PoE switch 200 to the port opposite the surge protector 100, it is possible to install the surge protector 100 in a network very simply. That is, after removing the line-side cable installed in the conventional PoE switch 200, connect the surge protector 100 of the present invention to the PoE switch 200 for each port, and again connects the line-side cable to the other of the surge protector 100 Installation can be completed by connecting to the port.

The user terminal 10, 20 may be an IP phone, a fax, or a computer that the user uses at the network end.

By configuring the network as described above, not only the PoE switch 200 can be protected from the surge voltage flowing into the line side, but also the network equipment connected to the PoE switch 200 can be protected. In addition, both communication (Date) and power (Power) can be protected together from surge voltage.

Figure 2 is a part of the outer housing of the surge protector 100 according to an embodiment of the present invention (front or rear portion of the surge protector 100; the criteria of the expression 'front portion' and 'back portion' is arbitrary so that It can also be called "side part", it is the same below). The outer case configuration of the equipment-side terminal (PoE switch side terminal) of the surge protector 100 having a rectangular box-shaped housing is shown. Through this part, a separate cable is used to connect the PoE switch. For this purpose, PoE switch connection ports 119 and 119 are provided in a line. In a preferred embodiment, such a PoE switch connection port (119, 119 ...) is a pair of eight can be formed of three groups, that is, 24 ports. In addition, LEDs 199, 199 ... indicating whether the surge protector 100 and the PoE switch are properly connected to each port are provided for each port. This makes it easy to grasp the state of surge protection operation.

In the embodiment of Figure 2 the maximum surge protection circuit would be 24 ports. However, 16, 8, and 4 ports can be configured, and a surge protector with a single port on the line side and equipment side can be installed. Various other modifications are possible and can be expanded in units of 1 port.

Figure 3 schematically shows the internal configuration of the surge protector 100 in one preferred embodiment of the present invention. The surge protector 100 includes a first overvoltage protection unit 130, an overcurrent protection unit 140, a second overvoltage protection unit 150, and a PoE detector except two terminals 110 and 120 in opposite directions. 160). The configuration of Figure 3 shows the internal configuration of protecting equipment from surge voltage in protecting one line. In protecting the N lines, circuits may be configured as shown in FIG. 3. For example, in the preferred embodiment, if the surge protector of the present invention protects 24 lines, 24 first overvoltage protection unit 130, overcurrent protection unit 140, and second overvoltage protection unit 150 may be configured. It becomes possible. A port is assigned to each line side terminal 110, and a port is also assigned to each PoE switch side terminal 120.

Connected to the line side terminal 110 is a user equipment terminal. Surge voltage is introduced to the equipment through the line from the user equipment terminal. In the present invention, surge voltage is classified into two types. The first type of surge voltage is a surge voltage that is drawn at a rate faster than the rate at which the arrestor reacts, and the second type is a surge voltage that is drawn at a slower rate and discharged by the arrest. These speeds are relative, but the surge voltage of the second type corresponds to the speed at which they are discharged and blocked by the arrester, and therefore can be prevented by the usual arrester. However, a surge voltage of type 1 quickly enters the equipment before the arrester discharges, so countermeasures are needed to prevent it. In particular, as the technology of communication equipment has advanced, fast response speed and sensitivity have emerged. Therefore, it has been necessary to deal with surge voltages more sensitively.

The first overvoltage protection unit 130 and the overcurrent protection unit 140 protect the circuit from the surge voltage of the second type. The second overvoltage protection unit 150 protects the circuit from the surge voltage of the first type. The first overvoltage protection unit 130 protects the circuit from a surge voltage having a large internal capacity but a slow reaction rate, and the second overvoltage protection unit 150 protects the circuit from a surge voltage having a small internal resistance but a fast reaction speed. As described above, the present invention can be expressed as a "hybrid" surge protector because the circuit is protected from the surge voltage by dividing the surge content and the reaction rate.

The first overvoltage protection unit 130 is an arrester and discharges the incoming surge voltage to ground. In a preferred embodiment, it can be installed according to the DC 3V ~ 48V according to the applied voltage for each equipment applied. The overcurrent protection unit 140 limits the current more than the rated value of the surge voltage. It can be made of a polymer switch, which limits the current by increasing the resistance when an overcurrent enters due to the shrinkage expansion function of the polymer.

The second overvoltage protection unit 150 is formed of a semiconductor device, and performs a function of bypassing the ground to a ground when a surge voltage is input. Preferably it can be installed by adjusting the rated voltage to DC 3V ~ 48V. By setting the rated voltage in this way, it is possible to cope with the rated voltage of the PoE switch. Response rate is 1 Pico-sec. Set to

When the surge voltage is introduced, basically, the arrester of the first overvoltage protection unit 130 discharges the surge voltage to protect the circuit, but before the arrester of the first overvoltage protection unit 130 discharges the surge voltage, it passes through it. For a surge voltage with a high speed, the semiconductor device of the second overvoltage protection unit 150 in which the reaction rate is quickly set in pico units is sent to ground to protect the circuit from the surge voltage. The first overvoltage protection unit 130 will begin to operate while the second overvoltage protection unit 150 blocks the surge voltage.

The PoE detector 160 detects the type of the PoE switch connected to the surge protector 100 through the PoE switch side terminal 120. The PoE switch is connected to the surge protector 100 through a cable consisting of eight lines. The configuration of the line may be different for each manufacturer. The PoE detection unit 160 may determine this and configure a variable circuit that associates the surge protector 100 with the PoE switch. Some cables are LAN lines 1, 2, 3, and 6 that send and receive data, and lines 4, 5, 7, and 8 are power lines. In another cable, lines 1 and 2 are responsible for data reception, lines 3 and 6 are responsible for data transmission, and power lines are lines 1 and 2 (DC +) and lines 3 and 6 (DC-). Data and power at the same time, and the 4, 5, 7, 8 lines may be empty. For example, in a preferred embodiment, the PoE detector 160 constitutes a variable circuit so that the surge protector 100 of the present invention can operate in both cases.

In addition, when the PoE detection unit 160 determines the type of the PoE switch and succeeds in setting the device for operating the protector, the PoE detection unit 160 may be electrically connected to the LED (199 of FIG. 2) displayed on the outer housing. In installing a surge protector, it is very important for the installer to verify that the surge protector is properly installed. It is a surge protector that protects network equipment in case of abnormal voltage such as lightning surge or switching surge, so it is essential for network management to check if it is properly set up. Moreover, the reality is that the cable structure of PoE switches varies among equipment manufacturers.

As described above in detail, the second overvoltage protection unit 150 may be fired faster than the first overvoltage protection unit 130 because the reaction speed is fast but the internal resistance is small. Therefore, replacement of burned-out protection elements is necessary to protect the circuit. 4 illustrates how the second overvoltage protection unit 150 is configured in a circuit. According to the present invention, the overvoltage protection device of the second overvoltage protection unit is mounted on a separate PCB, and the separate PCB is detachably mounted on the main PCB (not shown). The circuit boards of the first overvoltage protection unit 130, the overcurrent protection unit 140, and the PoE detection unit 160 are mounted on the main PCB.

FIG. 4A illustrates a second overvoltage protection device accommodating part 151 installed on the main PCB, and FIG. 4B illustrates a second overvoltage protection device PCB 155 mounted on the second overvoltage protection device accommodating part 151. ). The second overvoltage protection element accommodating part 151 is mounted on the main PCB and is electrically connected to other circuit elements. And the pinhole 152 is provided (10 pinholes in the embodiment of FIG. 4), and each pinhole 152 is insulated. As shown in FIG. 4B, a protection device (not shown), which is a semiconductor device that bypasses an abnormal voltage to ground, is mounted on a surface of the second overvoltage protection device PCB 155. Connection pins 157 are provided to electrically connect them with the main PCB. The connecting pin 157 is mounted in the pinhole 152 of FIG. 4A to constitute the second overvoltage protection unit.

When the surge voltage flows into the surge protector of the present invention, the second overvoltage protector is operated first, and may be fired when the surge voltage is higher than the reference value because the strength is small. Among the surge protectors of the present invention are the most frequently broken parts. At this time, the connection pin 157 may be removed from the pinhole 152 to separate and replace the second overvoltage protection device PCB 155 from the main PCB.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the scope of protection of the present invention can not be limited by obvious alterations or permutations of the present invention.

Claims (5)

As a surge protector connected to network equipment with Power over Ethernet (PoE):
A line terminal connected with a cable drawn from the user equipment terminal;
A first overvoltage protection unit for blocking a first surge voltage coming from the line terminal;
An overcurrent protection unit for limiting an overcurrent of the surge voltage;
A second overvoltage protection unit which cuts out a surge voltage which is drawn faster than the first surge voltage and which has a smaller internal capacity than the first overvoltage protection unit but has a faster reaction speed;
An equipment-side terminal connected to the network equipment and receiving power from the network equipment; And
A variable that is installed between the second overvoltage protection unit and the terminal of the equipment and detects a type of PoE switch connected to the terminal of the equipment and a cable, so that the surge protector and the PoE switch correspond to the line configuration of the cable An integrated hybrid surge protector for network equipment having an Ethernet power supply, comprising: a PoE detection unit constituting a circuit, and simultaneously protecting a power supply portion and a communication portion of the network equipment from a surge voltage. delete The method of claim 1,
The overvoltage protection device of the second overvoltage protection unit is mounted on a separate PCB, and ensures replacement of the overvoltage protection device by allowing the separate PCB to be detachably mounted on the main PCB, an integrated type for network equipment with Ethernet power. Hybrid surge protector. The method of claim 1,
The line terminal is installed in the rear or front portion of the surge protector housing, the equipment-side terminal is installed in the front or rear portion of the surge protector housing,
The first overvoltage protection unit, the overcurrent protection unit and the second overvoltage protection unit is installed separately for each terminal port, integral hybrid surge protector for network equipment having an Ethernet power source. delete

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