... widely exported to Russia, Ukraine, Poland, UK. Italy, etc. surge protective devicesurge protectorCE certificatewidely exported to Russia, Ukraine, Poland, UK ... :SPD, alias : surge protector, surge arrester) is suitable for TN-S,TN -C-S,TT.IT etc. power supply system of AC ... the failure release will help electric device separate from the power system and give the indication signal, green means normal , ...