| 摘要 |
Embodiments of the present invention disclose a lightning protection radio remote unit RRU, which includes a primary circuit, a secondary circuit, and a working circuit, where the primary circuit and the secondary circuit are configured to convert a power supply output by a power supply system into a working power supply to power the working circuit; the shield layer located on the RRU side of the shielded cable and the shield layer located on the power supply system side of the shielded cable are grounded respectively; a surge over-voltage withstand capability between the primary circuit and the earth is not less than a lightning over-voltage; a surge over-voltage withstand capability between each inner conductor in the shielded cable and the shield layer of the shielded cable is not less than the lightning over-voltage; and the lightning over-voltage derives from a product of a shield layer lightning current that flows through the shield layer of the shielded cable and a resistance of the shield layer of the shielded cable, and the shield layer lightning current is determined according to a lightning current compliant with a specific lightning protection level. With the embodiments of the present invention, it is not necessary to install a lightning protection module on both the RRU side and the power supply system side, which reduces costs and device size. |
