KT-AC-SPD-A1 Series
KT-AC-SPD-B1 Series
KT-AC-SPD-C1 Series
AC Intelligent SPD
KT-DC-SPD-A1 series
KT-DC-SPD-B1 Series
KT-DC-SPD-C1 series
DC Intelligent SPD
OEM-SPD TYPE 1
OEM-SPD TYPE 2
OEM-SPD TYPE 2+3
OEM-SCB TYPE 1+2