... according to IEC-185 2,suit for TN-S TN-C-S TT IT etc. 3,a failure release mounted ... surge protect device (SPD) is suit for TN-S,TN-C-S,TT,IT etc. power supply system of AC 50 ... Kevin wiring mode, remote signaling output interface. It’s also could be replaced for the module when has ... or three-phase surge protector freely according to user’s requirements. Generally installed to inlet low voltage main ...