Triple mine incorporates power lines, video and lightning protection, lightning three line control signal line 485 is connected in series in the line, the product uses multi-level anti-lightning overvoltage protection design, aluminum shield packaging, small size, easy installation, with the normal operation indicator, power supply voltage is 220V, 24V, 12V optional. SPD need grounding lightning regulatory requirements should be consistent with (grounding resistance should be less than 10Ω), and coarse ground wire as far as possible, short, straight.