Profile: Shanghai Lerdn Lightning Protection Co., Ltd. specializes in the research & development and manufacturing of surge protective devices with complete series in power, control signal, computer network & video signal system. We are an ISO 9001:2000 and ISO 14001:2004 certified company. Our LDY-30A/50A low voltage power systems are applied to equipotential bonding of the low voltage side of transformer/main low voltage distribution boxes inside the building. It provides protection against the over-voltage arising from the lightning strike to power supply system. Our LDY XA230BC series monitoring synthetic lightning protection device are applied to lightning protection of power, control signal and BNC video signal of monitoring system with function of low clamping voltage & quick response. These can be used to release and prevent the damage to the protected device arising from inductive lightning from power & control wire. These are widely used in the field of security monitoring system. We offer lightning protection module to power system, control signal, computer network, CCTV and computer room. We also provide 2 and 3 camera lightning protection module, unitized lightning protection box, counter, protection socket, rod & lightning arrester.