Bilingual Reading

ID

English (US)

Chinese Simplified (简体中文)

1

The users of electronic equipment and telephone and data-processing sys- tems must face the problem of keeping this equipment in operation in spite of the transient overvoltages induced by lightning. 电子设备、电话和数据处理系统的用户必须面对当雷电引起瞬态过压时仍能保持设备运行的问题。

2

There are several reasons: 原因如下:

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Integration of electronic components makes the equipment more vulnerable. 电子元器件的集成使设备更易损。

4

Interruptions of service are unacceptable. 服务中断是不能接受的。

5

Data transmission networks cover large areas and are exposed to more disturbances. 数据传输网络涵盖的范围大且受干扰较多。

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The origin of overvoltages 过压的起因

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Transient overvoltages have four main causes : 瞬态过压有四个主要诱因:

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Lightning 雷电

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Industrial and switching surges Electrostatic discharges (ESD) 工业和开关浪涌静电放电 (ESD)

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Nuclear electromagnetic pulses (NEMP) 核电磁脉冲 (NEMP)

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Overvoltages differ in amplitude, duration and frequency. 过压的振幅、时长和频率都不相同。

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Lightning and industrial overvoltages have been with us for a long time, but ESD and NEMP disturbances are much more specific and arise from recent technological developments (massive use of semiconductors for the former, thermonuclear weapons for the latter). 我们经常遭遇雷电和工业过压,而 ESD 和 NEMP 干扰则随着近年来的技术发展(前者来自半导体的大量使用,后者则来自热核武器)而出现,并表现得更为具体。

13

Lightning, investigated since Benjamin Franklin’s first research in 1749, has paradoxically become a growing threat to our highly electronic so- ciety. 1749 年本杰明·富兰克林即首次对雷电开始研究,然而雷电对我们这个满是电子产品的社会所带来的威胁却反而愈演愈烈。

14

A lightning flash is generated between two zones of opposite charge, typically between two storm clouds or between one cloud and the ground. 闪电是在两个相反电荷区域之间产生,一般是在两团雷雨云或一团雷雨云与地面之间。

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The flash may travel several miles, advancing toward the ground in suc- cessive leaps: the leader creates a highly ionized channel. 闪电可以绵延数英里长,并以连续跳跃式通向地面:闪电先导可以产生高离子通道。

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When it reach- es the ground, the real flash or return stroke takes place. 当闪电触到地面,便产生真正的闪光或回击。

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A current in the tens of thousands of Amperes will then travel from ground to cloud or vice versa via the ionized channel. 随后,一道数万安培的电流将通过高离子通道从地面射向云端(或从云端射向地面)。

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Direct effects 直接效应

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At the moment of the discharge, there is an impulse current flow that ranges from 1,000 to 200,000 Ampere peak, with a rise time of about few microseconds. 放电瞬间(大约几微秒的时间内)将会出现一道 1000 至 200000 安培不等的峰值电流脉冲。

Industry

Manufacturing/Industry

Subject

Electronics / Elect Eng

Product

General

Our Task

TEP (translation, edition, proofreading)

Source File Format

sdlxliff

Skills Involved or Tools Used

Transee, DTP