LH-BD (18 laula) series surge protector (ma hope aku i kapa ʻia ʻo SPD) kūpono no IT, TT, TN a me nā ʻōnaehana lako mana ʻē aʻe o nā ʻōnaehana haʻahaʻa AC haʻahaʻa no ka pale ʻana i ka uila kūwaho, ka uila pololei a i ʻole nā hoʻoulu overvoltage koke.
ʻO ka lua a me ke kolu o ka pae ʻana i nā mea pale a me nā papa hoʻāʻo hoʻāʻo ʻo Class II e pili ana i ka maʻamau IEC61643-1.
Loaʻa iā SPD nā ʻano pale maʻamau (MC) a me nā ʻano pale ʻokoʻa (MD). Hoʻopili nā huahana i nā kūlana e like me GB/T 18802.11 a me IEC61643-1.