KR100370666B1 - Protector for area network - Google Patents

Abstract

The present invention relates to a communication protector installed on the inner side of a local area network or exchange equipment to protect the local area network or the exchange equipment from falling lightning, overvoltage, overcurrent flowing from the outside.

The communication protector of the present invention includes a PCB inserted into and connected to the inner side of the protector module; A first overvoltage protection device for preventing an overvoltage introduced from a lightning strike on the PCB; A second overvoltage preventing device for preventing an abnormal voltage flowing from an external line at a lower side of the first overvoltage preventing device; A ground terminal configured to ground a lightning strike at one front side of the first overvoltage protection device; The rear of the first overvoltage protection device is characterized by consisting of an overcurrent limiting device to protect the equipment from the overcurrent flowing from the outside.

Description

Communications Protector {PROTECTOR FOR AREA NETWORK}

The present invention relates to a communication protector, and in particular, a communication protector installed on a local area network (LAN) or on an internal (exchange side line) side of an exchange device to protect a local area network or an exchange device from overvoltage and overcurrent flowing from the outside. It is about.

In general, local area networks are equipment installed within a limited area.

The local area network is equipped with a protector to protect the equipment from overvoltage, overcurrent flowing from the outside.

In addition, in the protector of the local area network, the main distribution frame and the digital distribution frame, which connect a plurality of external lines (subscriber side lines) such as telegraphs or telephones, with the exchange, are separately configured.

In addition, the protector is equipped with an over-current limiting element for limiting the over-current flowing from the outside and an over-voltage preventing element for preventing the over-voltage flowing from the lightning, the over-current limiting element is composed of a heat radiation coil having a relatively high inductive resistance It is designed to protect the equipment by limiting the flow of overcurrent flowing from the outside through the resistor.

However, the heat dissipation coil may limit the flow of overcurrent introduced by a large inductive resistance, whereas a lot of heat of resistance is generated, and the contact spring and the internal and external spring terminals supporting the heat dissipation coil are generated due to the resistance heat. In addition, it causes the poor contact of the melter and even melts the sheath of the protector base so that it cannot function as a protector.

In addition, the protector is not compatible with the IDC (Insulation Displacement Contact (IDC) type protector module, but is also mounted on the outside line, so that the system can be replaced, line tested and The circuit inspection has a problem that it is inconvenient and troublesome to remove, protect, and perform the test.

An object of the present invention is to provide a protector that can protect the local area network or switching equipment from overcurrent, overvoltage flowing from the outside.

Communication protector of the present invention for realizing the above object is a printed circuit board (PCB) is inserted into the inner side of the protector module installed in the local area network or exchange equipment; A first overvoltage protection device (Arrester) on the PCB to prevent overvoltage from lightning; A second overvoltage prevention device (Varistor) on the lower side of the first overvoltage protection device to prevent an abnormal voltage flowing from the outside line; A ground terminal configured to ground an overvoltage on one front side of the first overvoltage prevention device; It is characterized by consisting of a pair of over-current limiting element (PTC) to protect the equipment from the over-current flowing from the outside.

1 is a side view of the internal configuration of the communication protector of the present invention.

2 is a state in which the communication protector of the present invention is connected to a protector module.

<Description of the symbols for the main parts of the drawings>

1-PCB

2-first overvoltage protection element

3-second overvoltage protection device

4-Ground Terminal

5-overcurrent limiting device

6-lightning

7-wire

8-saver module

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of the internal configuration of the communication protector of the present invention, and FIG. 2 is a state diagram in which the communication protector of the present invention is connected to a protector module. In the communication protector of the present invention, a PCB 1 is created inside, and various elements are arranged and connected to the PCB 1. 2 shows a protector module 8 installed in a local area network or exchange equipment and a PCB 1 inserted into and connected to the inner side of the protector module 8. PCB 1 of FIG. 1 includes a first overvoltage protection element 2 for preventing overvoltage flowing from a lightning strike; A second overvoltage protection device 3 for preventing an abnormal voltage flowing from an external line at a lower side of the first overvoltage protection device 2; A ground terminal (4) at one front side of the first overvoltage protection device (2) for grounding an overvoltage; The rear of the first overvoltage protection device 2 constitutes a pair of overcurrent limiting devices 5 for protecting the local area network or the switching equipment from the overcurrent flowing from the outside.

As shown in Fig. 2, the PCB 1 is divided in the middle of the insertion plug to form a call line TR, and receives a call current from the outside. Silver is connected to the ground through electric wire (7), and the other side is connected to the melting point of the first overvoltage protection device (2) and lights up when the first overvoltage protection device (2) is melted and connected due to lightning Is displayed.

PCB (1) of the present invention configured as described above is inserted into the internal side of the protector module 8 of the local area network or exchange equipment to connect the subscriber line (external) and the exchange line (extension), subscriber line It operates when lightning, abnormal voltage or over current flows from (ultraviolet) to protect the exchanger side (extension side) machine.

Looking at the operating state of the PCB (1) embedded in the communication protector of the present invention, in the normal state, the call current flowing from the subscriber line is the outer terminal of the protector module (8), the call line (T) of the PCB (1), First overvoltage protection device 2, overcurrent limiting device 5, second overvoltage protection device 3, telephone line R of PCB 1, internal terminal of protector module 8, exchanger, protector module The circuit is composed of the internal terminal of (8), the external terminal of the protector module 8, and the subscriber line. The ideal state, that is, when a lightning strike flows from the subscriber line (external), causes a lightning protection module. Since the external terminal of (8), the communication line (T) of the PCB (1), and the first overvoltage protection device (2) flow in, the overvoltage and overcurrent of the lightning strike melts the first overvoltage protection device (2) and the PCB (1). Connection line (T) to the ground terminal (4), the lightning strikes the ground and disappears, so the exchange is safe will be.

Next, when an abnormal voltage flows from the subscriber line (external line), the abnormal voltage flows into the external terminal of the protector module 8, the call line T of the PCB 1, and the first overvoltage protection device 2, Since the first overvoltage protection device 2 does not melt at the abnormal voltage, it flows into the second overvoltage protection device 3 via the overcurrent limiting device 5. In the second overvoltage protection device 3, when an abnormal voltage is introduced, the temperature increases, and when the temperature increases, the resistance increases. When the resistance of the second overvoltage protection device 2 rises, the abnormal voltage does not pass through the second overvoltage protection device 2 and disappears, thereby protecting the exchanger even under the abnormal voltage.

Next, when an overcurrent flows from the subscriber line (external line), the overcurrent is connected to the external terminal of the protector module 8, the PCB 1 communication line T, the first overvoltage protection element 2, and the overcurrent limiting element 5 Flows into. When overcurrent flows into the overcurrent limiting element (5), the overcurrent limiting element (5) has its own temperature rise, and if the temperature rises, the resistance rises, and the overcurrent does not pass through the overcurrent limiting element (5) and disappears. It is a protection.

The operation process of the lightning indicator 6 lights up when the lightning strikes the first overvoltage preventing element 2 due to the overcurrent caused by the overvoltage of the lightning strike. One side of the lightning indicator 6 is connected to the molten contact of the first overvoltage protection element 2, and the other side is connected to the ground via the wire 7. When the first overvoltage protection device 2 is melted, the lightning indicator 6 is turned on so that one side is connected to the melting point, thereby indicating the inflow of the lightning. In the large and small lightning strike regions, if not only the first overvoltage protection device 2 but also the second overvoltage protection device 3 are configured, the second overvoltage protection device 3 has the same characteristics as the overcurrent limiting device 2. Therefore, it can effectively improve the function of the communication protector because it effectively copes without replacing the device in the case of low lightning.

As described above, the present invention is to protect the local area network or the exchange equipment from lightning, abnormal voltage and overcurrent flowing from the outside, and by simply inserting the PCB on the inner side of the protector module, it is easy to connect and install. .

Claims (2)

In the communication protector to protect the local area network or the exchange equipment from the overvoltage and overcurrent introduced by the lightning or abnormal voltage flowing from the outside line, the PCB mounted inside the communication protector is designed to prevent the overvoltage from the lightning. 1 overvoltage protection element; A second overvoltage preventing device for preventing an abnormal voltage flowing from an external line at a lower side of the first overvoltage preventing device; A ground terminal configured to ground a lightning strike at one front side of the first overvoltage protection device; And an overcurrent limiting device configured to prevent an overcurrent flowing from the outside at the rear of the first overvoltage preventing device. delete