JPH09162971A - Lighting surge protection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a device from an induced lighting produced between a commercial power supply and a telephone line by providing a lightning surge absorbing device between a power supply to be connected to the device and a telephone line to be connected to the device. SOLUTION: A power supply connection section 12 of the surge protection device 11 connects to a commercial power supply 5 and a picture signal input section 2 of a device 1. Furthermore, a line connection section 13 connects to a telephone line 9 and a line input section 3 of the device 1. Then a lightning surge absorbing device 14 is connected between the power supply connection section 12 and the line connection section 13. When a surge current by an induction lightning flows from the commercial power supply 5 to the telephone line 9, since the surge current flows to a path consisting of the commercial power supply 5, the power supply connection section 12, the lightning surge absorbing device 14, the line connection section 13 and the telephone line 9, the current does not flow to the inside of the device 1. A surge current caused by an indirect lightning stroke flowing from the telephone line 9 to the commercial power supply 5 is bypassed by the lightning surge absorbing device 14 and does not flow to the inside of the device 1. Thus, the device 1 is protected against the indirect lighting stroke produced between the power supply 5 and the line 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning surge protection device for protecting equipment from induced lightning generated between a commercial power source and a telephone line.

[0002]

2. Description of the Related Art In recent years, information devices such as personal computers and workstations have been actively connected to telephone lines for data communication. In this case, the connection between the information device and the telephone line is generally made via a modem device or a built-in modem board. When connecting a commercial power supply or a telephone line to an information device, a problem often arises is how to protect the device from an induced lightning that enters from the commercial power supply or the telephone line. FIG. 2 illustrates a configuration example of a lightning surge protection device that is generally used in the past, taking a personal computer having a built-in modem board as an example.

As shown in FIG. 2, a power supply input section 2 of a personal computer (apparatus) 1 is connected to a commercial power supply 5 via a power source lightning surge protection device 4. The power supply lightning surge protector 4 is connected to the ground 7 by a ground terminal 6, protects the personal computer 1 from a surge between power supplies, and also absorbs an induced lightning generated between the commercial power supply 5 and the ground 7, Protect the personal computer 1.

On the other hand, the personal computer 1 has a line input section 3 for connecting a telephone line to a built-in modem board. The line input unit 3 is connected to the telephone line 9 via a line lightning surge protector 8. The line lightning surge protector 8 is connected to the ground 7 by a ground terminal 10, protects the personal computer 1 from a surge between lines, and also absorbs an induced lightning generated between the telephone line 9 and the ground 7, Protect the personal computer 1.

[0005]

However, in the configuration of the conventional example as described above, when an induced lightning occurs in the commercial power source 5 and the telephone line 9, the surge current due to the induced lightning passes through the inside of the device 1, It is necessary to protect against surge current inside the equipment. In the case of a single device, it is possible for the device manufacturer to give consideration to protection, but when a system is constructed by combining multiple devices, it is often not possible to give sufficient consideration. For example, in the above example, in the case where the makers of the personal computer and the modem board are different from each other, sufficient protection is often not performed.

Therefore, the present invention solves the above-mentioned conventional problems and makes it possible to protect equipment by preventing surge current due to inductive lightning generated between a commercial power source and a telephone line from passing through the equipment. It is an object to provide a lightning surge protection device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is designed to bypass a surge current due to induced lightning generated in a commercial power source and a telephone line without passing through the inside of a device by a lightning surge absorbing means. It is composed.

As a result, the device can be protected from the surge current caused by the induced lightning.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a power source connecting means for connecting a commercial power source and a power source input section of a device to be protected from lightning surge, a telephone line and a telephone line input of the device. The line connecting means for connecting the parts, and the lightning surge absorbing means provided between the power source connecting means and the line connecting means, surge current due to induced lightning generated in the commercial power source and the telephone line, The lightning surge absorbing means has an effect that it can be bypassed without passing through the inside of the device.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a lightning surge protection device according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a device such as a personal computer to be protected, which has a power input unit 2 and a line input unit 3. Reference numeral 11 is a lightning surge protection device of the present invention. In the lightning surge protection device 11, reference numeral 12 is a power supply connecting means, which connects the commercial power supply 5 and the power supply input section 2 of the device 1. Reference numeral 13 is a line connection means, which is a telephone line 9 and a device 1.
The line input section 3 of is connected. Reference numeral 14 is a lightning surge absorbing means, which is connected between the power source connecting means 12 and the line connecting means 13.

With this configuration, when the surge current due to the induced lightning flows from the commercial power source 5 toward the telephone line 9, the surge current is the commercial power source 5, the power source connecting means 12, the lightning surge absorbing means 14, and the line connecting means 13. , It does not flow inside the device 1 because it flows through the telephone line 9. Similarly,
The surge current due to the induced lightning that flows from the telephone line 9 toward the commercial power supply 5 is also bypassed by the lightning surge absorbing means 14, and does not flow inside the device 1. Therefore, commercial power source 5
The device 1 can be protected from the induced lightning generated between the telephone line 9 and the telephone line 9.

If a grounding terminal is provided in this device and a lightning surge absorbing means is provided between the power supply and the ground, between the line and the ground, and between the power supply and the line, this device alone has been used conventionally. It is also possible to combine the lightning surge protection device for the power supply and the lightning surge protection device for the line.

[0014]

As described above, according to the present invention, by providing the lightning surge absorbing means between the power source connecting means and the line connecting means, the device is protected from the induced lightning generated between the commercial power source and the telephone line. Can be protected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a lightning surge protection device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration for protecting a device using a conventional lightning surge protection device.

[Explanation of reference numerals] 1 equipment 2 power input section 3 line input section 9 telephone line 11 lightning surge protection device 12 power supply connecting means 13 line connecting means 14 lightning surge absorbing means

Claims (1)

[Claims] 1. A power source connecting unit for connecting a commercial power source and a power source input unit of a device to be protected from lightning surge, a line connecting unit for connecting a telephone line and a telephone line input unit of the device, and the power source connecting unit. A lightning surge protection device comprising a lightning surge absorbing means provided between the line connecting means.