JPH0621203U - Communication line arrester - Google Patents

Abstract

(57) [Abstract] [Purpose] This invention relates to an arrester (protector) for communication lines. Conventionally, carbon has been used for the electrodes of this type of arrester, but the durability of the carbon arrester was extremely low. , It is intended to extend the durability by using a material that should be substituted for this. [Structure] In order to achieve the above object, the present invention can achieve the intended object by using a mixed sintered material of carbon and ceramic (in this case, no binder is used) instead of carbon. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an arrester used for a communication line. To be more specific, if the communication line is outdoors, there is always the danger of lightning, high voltage contact, etc., and the abnormal voltage that enters these communication lines is removed to remove the abnormal voltage from the telephones and fax machines installed in the terminals of the communication line. , It relates to arresters for protecting computers, etc.

[0002]

[Prior Art] and

[Problems to be solved by the device]

 In the past, most of the arresters described above used carbon materials for the electrodes, with an appropriate insulating film interposed between them, but with such a structure, abnormal high voltage The damage to the electrode surface during discharge based on the above is extremely large, and generally, carbon particles are laminated on the carbon electrode surface by repeated discharge 30 to 60 times, resulting in a short state.

The present invention is characterized by using a material in which carbon and ceramics are sintered and formed in the electrode portion which is conventionally made of carbon as a main material. By doing so, it is possible to repeat 2000 times or more. It was found to withstand discharge.

[0004]

【Example】

 In the figure, 1 is a line electrode, 2 is a ground electrode, 3 is a conventionally known insulating gap (mylar) mainly composed of mica, which is interposed between both electrodes. Reference numeral 4 is a line electrode lead, and 5 is an earth electrode lead. The electrodes 1 and 2 are formed of a material obtained by mixing and sintering a carbon material and a ceramic material without using a binder.

In the above example, the case where there are two electrodes is shown, but there are cases where there are three electrodes, and in this case it goes without saying that the electrodes on both ends are line electrodes.

[0006]

[Effect of device]

 Since the arrester of the present invention uses, as described above, a material formed by mixing and sintering carbon and ceramic without using a binder, it has good electrical conductivity even at high voltage, and In fact, the damage to the electrode surface due to the discharge is extremely small, and the durability result can be said to be epoch-making as described above. Moreover, it is a great advantage that it is easy to manufacture and can be offered at a low price, and it is not just a mere conversion of the use of conventionally known materials, but it is a utility model for cultivating new utilization areas that no one has ever implemented. Believed to be eligible.

FIG. 2 shows a diagram showing the resistance of the product of the present invention and that of the conventional product. As can be seen from this figure, the product of the present invention can be used more than 2000 times of discharge, while the conventional product can be used for 30 to 60 times. At first glance, the service life is lost, and it can be proved that this product is outstanding in terms of service life. In the diagram, Vs is Ac spark communication voltage, N is the number of discharges, and the waveform at this time is 10 × 200 ms; impulse current is 200 A; test interval is 1 minute.

[Brief description of drawings]

FIG. 1 is a principle simplified perspective view for easily explaining an arrester of the present invention.

FIG. 2 is a diagram for comparing the durability of the product of the present invention with that of the conventional product, where (A) shows the product of the present invention and (B) shows that of the conventional product.

[Explanation of symbols]

 1 line electrode 2 earth electrode 3 insulation part 4 line electrode lead 5 earth electrode lead

Claims (1)

[Scope of utility model registration request] 1. A conventionally known at least bipolar electrode, wherein a carbon-ceramic mixed material is used in a portion where carbon is used in an arrester electrode, and an insulating gap portion made of a known material is provided between these electrodes. An arrester for a communication line, wherein the hybrid material is mixed and sintered without using a binder.