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Lightning arrester, structure pillar having lightning arresting function, and reduction method of lightning surge voltage

A lightning protection device and surge voltage technology, applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. In order to avoid problems such as step voltage increase, it can reduce lightning disasters, suppress potential rise, and reduce grounding impedance.

Active Publication Date: 2009-08-19
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] If the potential rise of the ground electrode due to lightning surge current increases, the touch voltage or step voltage will increase, and there is a danger of electric shock to nearby residents or animals.

Method used

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  • Lightning arrester, structure pillar having lightning arresting function, and reduction method of lightning surge voltage
  • Lightning arrester, structure pillar having lightning arresting function, and reduction method of lightning surge voltage
  • Lightning arrester, structure pillar having lightning arresting function, and reduction method of lightning surge voltage

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no. 2 Embodiment approach

[0074] According to the second embodiment of the present invention, the lightning protection device 1 is attached to existing equipment such as the signal machine 40, so compared with the case where the lightning protection device 1 is installed independently, the required strength and supporting structure can be reduced. Design constraints and the like make it easy to downsize and simplify, and the equipment cost and equipment space of the lightning arrester 1 can be reduced. The second embodiment of the present invention has the same effect as the first embodiment.

[0075] As a third embodiment of the present invention, as Figure 6 As shown, the present invention can also be applied to construction columns with lightning protection functions. Figure 6 It is a cross-sectional view in the vertical direction of the structural column 60 according to the embodiment of the present invention. Figure 7 yes Figure 6 The enlarged section view in Y—Y direction.

[0076] Such a...

Embodiment

[0123] Generally, the main frequency component of the lightning surge current is considered to be 10 KHz to 1 MHz. By applying the general transmission formula, the lightning protection device 1 and the ground electrode 101 related to the embodiment of the present invention are estimated, thereby utilizing the sine wave constant current method analysis to verify its validity.

[0124] As mentioned above, the lightning arrester 1 and the ground electrode 101 are regarded as Figure 4 , 12 The equivalent circuit of the lossy line shown, therefore, in the following, is estimated using known general formulas. Furthermore, when the resistance R and the conductance G are set to 0 in the equivalent circuit of a lossy line, it corresponds to the equivalent circuit of a lossless line.

[0125] Generally, such as Figure 18 As shown in FIG. , it is well known that the inductance L (μH / m), capacitance C (pF / m), and resistance R (Ω / m) of the average unit length of the coaxial cable 95...

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Abstract

A lightning arrestor (1) for flowing the thunder surge current due to lightning strike (7) to the ground comprises a steel pipe (3), a conductor (4) coaxially disposed in the steel pipe (3), an a filler (10) placed between the steel pipe (3) and the conductor (4) and having a conductivity. With this, the thunder surge current flowing through the lightning arrestor (1) is divided. The low-frequency component flows through the conductor (4), and the high-frequency component flows through the steel pipe (3) outside the conductor (4) and the filler (10).

Description

technical field [0001] The present invention relates to a lightning protection device, a grounding electrode and a method for reducing lightning surge voltage, which prevent lightning disasters by allowing lightning surge current caused by lightning to flow to the ground side. Background technique [0002] When a high-output lightning surge current flows to various devices such as buildings and traffic signals, or trees due to a lightning strike, they will be destroyed. In recent years, the number of electronic devices that are particularly intolerant to electric shocks has also increased, and lightning disasters have become a very serious threat. In order to prevent such lightning disasters, conductors (usually called lightning rods, including lightning rods or lightning conductors, etc.) are used to ensure in advance a path for the lightning surge current caused by lightning to flow to the ground side. [0003] However, AC currents of various frequencies are included in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05F3/04H02G13/00H02H9/06
Inventor 宫川隆中村光一堀部勋夫
Owner NIPPON STEEL CORP
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