Considering the factors such as randomness of natural lightning locus and the coexistence of primary and secondary leaders, it is necessary to lead in the concept of dynamic lightning protection shielding angle. It is suggested that the angular bisector of practical protective angle formed by ground wire or earth pin in UHVAC transmission line and conductor should be aligned with the direction of lightning leader as well as the ratio of vertical span to horizontal span and the impact of wind speed should be considered.

考慮自然閃電軌跡的隨機(jī)性和雷電主先導(dǎo)與次先導(dǎo)并存現(xiàn)象等因素最新2021自拍自产视频，有必要引入動(dòng)態(tài)防雷保護(hù)角概念，建議特高壓交流線路中地線對(duì)導(dǎo)線的實(shí)際保護(hù)角形成的角平分線應(yīng)與雷電先導(dǎo)的來向一致金发白妞AV在线播放，并應(yīng)計(jì)及垂直檔距和水平檔距的比值和風(fēng)速的影響精品视频9999。

In South China where lightning is rather active, the tripouts of UHV transmission lines, which are caused by the failure of lightning shielding , frequently occur, so it is necessary to research the lightning shielding performance of UHV transmission line in depth.

雷害是輸電線路故障的主要原因，在我國南方多雷地區(qū)美女色色色网站，超高壓輸電線路頻繁發(fā)生雷電屏蔽失效引起的跳閘国内精品视频一区二区，有必要更深入地研究超高壓輸電線路的雷電屏蔽性能。

One of the company's main product —— the thunder and lightning radiation monitor meter and the thunder and lightning localization monitor system advanced technology has walked in the international front row, and success obtained 2008 Beijing Olympic Games' order form, it will be used in the stadium hall thunder and lightning harm to monitor and forewarn, protect the sport star athletes and the audiences safety.

公司的主要產(chǎn)品之一——雷電輻射監(jiān)測(cè)儀和雷電定位監(jiān)測(cè)系統(tǒng)的先進(jìn)技術(shù)走在了國際前列日本大片黄色，并成功獲得來自2008年北京奧運(yùn)會(huì)的定單人人漂人人操，用于體育場(chǎng)館的雷電危害監(jiān)測(cè)和預(yù)警，保護(hù)體育健將和觀眾們的生命安全黑人和黑人一级毛片。

The Application of Graphic Solution in Industrial Design;2. A graphic solution to ensuring the protection range of lightning rod is put forward instead of the complicated formulas,and the methods are discussed of the protection zone of single lightning rod,double and four lightning rods.

針對(duì)避雷針設(shè)計(jì)過程中計(jì)算公式過于復(fù)雜的問題日本屄视频，提出了利用平面幾何作圖求解避雷針聯(lián)合保護(hù)范圍的方法，給出了單支97欧美性爱在线、雙支和四支避雷針保護(hù)范圍的作圖解題步驟国内日韩免费在线一级片，并利用計(jì)算機(jī)圖形仿真，給出了避雷針保護(hù)范圍的空間結(jié)構(gòu)圖形精品国产黄。

A graphic solution to ensuring the protection range of lightning rod is put forward instead of the complicated formulas,and the methods are discussed of the protection zone of single lightning rod,double and four lightning rods.

針對(duì)避雷針設(shè)計(jì)過程中計(jì)算公式過于復(fù)雜的問題一级A片免观看，提出了利用平面幾何作圖求解避雷針聯(lián)合保護(hù)范圍的方法，給出了單支最近更新的中文字幕免费的视频、雙支和四支避雷針保護(hù)范圍的作圖解題步驟亚洲色图综合图片偷拍，并利用計(jì)算機(jī)圖形仿真，給出了避雷針保護(hù)范圍的空間結(jié)構(gòu)圖形日批黄色视频。

The lightning disaster existed widely and hazardously however its influence on electronic information system for mine has not aroused great attention yet The paper expatiates on the lightning harm to electronic information system and relevant technical standards so as to enhance the understanding of lightning protection of electronic information system for mine .

在分析雷電對(duì)電子信息系統(tǒng)入侵途徑及危害基礎(chǔ)上提出防護(hù)系統(tǒng)技術(shù)要求免费精品国产污网站在线观看，以提高人們對(duì)礦山電子信息系統(tǒng)雷電防護(hù)的認(rèn)識(shí)。

The influence of the line arrester on the lightning withstand level of 35kV transmission lines was simulated and calculated by electromagnetic transient software ATP-EMTP. The results show that the joining of line arrester can obviously improve the lightning withstand level of 35kV transmission lines, and is especially effective when the lightning directly strikes the conductor.

計(jì)算結(jié)果表明人成网免费，在"易擊段"架設(shè)線路避雷器后米奇色影院，可明顯提高35kV輸電線路的耐雷水平，尤其雷直擊導(dǎo)線時(shí)A在线免费看，線路避雷器的作用效果更加明顯在线视频福利资源；雷擊桿塔塔頂時(shí)，桿塔接地電阻是影響35kV輸電線路耐雷水平的重要因素日本人V精品视频一区。

This paper discusses the characteristics of the mobile communication base station struck by lightning,the choice of performance parameters of the base station lightning protector,the installation and employment of lightning protector,and the way of putting up wires externally concerning lightning .

防雷工作是一項(xiàng)復(fù)雜的系統(tǒng)工程强奸乱伦无码AV，通信基站的防雷措施應(yīng)建立在綜合治理、聯(lián)合接地女性黄色下体免费照片和视频永远免费、均壓等電位的基礎(chǔ)上AAA性爱片，文中僅就移動(dòng)通信基站遭受雷擊的特點(diǎn)，基站防雷器性能參數(shù)的選擇操逼网av，防雷器的安裝使用黑人一级A片欧美一级A片，以及通信基站的一些與防雷相關(guān)的外部進(jìn)線方式進(jìn)行論述并提出幾點(diǎn)建議。

After the observing of transmission line for a lightning storm season, we didnt find the lightning trip. The result indicates line-surge arrester can improve lightning-proof property evidently and reduce the lightning tripping outage.

通過兩個(gè)雷雨季節(jié)的觀察A片爽爽爽免费看视频网，發(fā)現(xiàn)110kV雙含線與110kV雙海線沒有再發(fā)生雷擊跳閘故障国产成人精品热播亚洲AV，表明了線路型避雷器能明顯改善山區(qū)輸電線路的防雷性能，降低輸電線路的雷擊跳閘率先锋5566资源网站资源。

After the observing of transmission line for a lightning storm season, we didnt find the lightning trip. The result indicates line-surge arrester can improve lightning-proof property evidently and reduce the lightning tripping outage.

通過兩個(gè)雷雨季節(jié)的觀察日韩揉揉人人澡澡人人，發(fā)現(xiàn)110kV康平線與220kV大安線沒有再發(fā)生雷擊跳閘故障，表明了線路型避雷器能明顯改善山區(qū)輸電線路的防雷性能免费污黄视频网站，降低輸電線路的雷擊跳閘率a级三级片网站。