The CTR-N/3P + N or 4P Series three-phase AC power surge protector is the modular Sentaur products one of the main series, the component has good lightning performance, safety performance and special structural requirements, to meet three-phase AC power system installation and maintenance requirements. Improve the technical and design to ensure the safety and reliability of the series run. This series of products for the protection of three-phase power supply system vulnerable to lightning, according to the different flow through as one, two, three protection, the parallel protection, flow capacity, the introduction of a unique long-life technology to avoid similar products vulnerable to deterioration failure. The module uses a large amount of redundant design, enhanced protection, such that the maximum discharge current up to 120 kA. Module shell is made of high-performance flame-retardant materials and deterioration automatically from the device, completely avoid the risk of explosion and fire to achieve the deterioration automatic detection and protection function. The product has a remote alarm contacts, the installation of a lightning counter. Long life, easy to deterioration failure; strict TOV and trip test to ensure the safety of the device itself; internal components of the large amount of redundant design, through flow, up to 120 kA; shell is made of flame retardant material PBT insulation, sealing structure designed to meet UL94-V0; fault status indication, timely reporting of product deterioration of the situation; remote signal contacts, for remote monitoring by this contact.