This Acti9 iPRD1 12.5r surge arrester protects 3P+N residential and small commercial buildings installations against direct and indirect transient overvoltages. This type 1+2 device autoprotected by an integrated circuit-breaker is recommanded for high risk level in incoming panel board. It offers remote reporting of the “cartridge must be changed” message. This prewired surge arrester allows quick replacement of withdrawable cartridges when they are damaged.