ABB OVR type 3 shall be installed as close as possible from the sensitive equipement to protect. Tested with a 1,2/50 - 8/20 current combination wave generator, they ensure a very low protection level voltage value. Main benefits include Extremely low level of protection voltage value that is suitable for all sensitive terminal equipments; Good value of Imax 10kA & Common and differential mode of protection. Main features include Imax 10kA; Up 900V & Uc 275V and 440V.