IEEE C62.55-2017

This guide covers the application of SPDs used to protect the dc power feeds of remote radio heads (RRH) and power supplies of fiber-optic cable systems feeding the antenna systems. New IEEE Standard - Superseded. The waveform of currents likely to exist on dc feeds to equipment located at the tops of towers due to a lightning strike, and the consequences of that waveform for protector design, are described in this guide