根据防雷等级不同，有不同的保护半径，并介绍了计算方法。

According to defend thunder to be grade different, there is different protection radius, has introduced the computing technology.

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分析了点型探测器“保护半径”与“保护面积”的内在关系，得出了以尽量趋于正方形设置为善的结论，并将按“面积”设置纳入受保护半径的制约；

The paper analyzes the internal relations between "protected radius" and "protected area", and comes to the conclusion of installing the detector in square;

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弯曲半径根据电缆截面型号选择，一根保护管最多不能超过三个弯头，垂直弯头不能超过两个。

The arch radius should be chosen according to the model of cable section; there should not be more than 3 elbows on one protecting pipe, and there should not be more than 2 vertical elbows.

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