Midziyo iyi inoenderana neyakasanganiswa wave yekuyedza inodiwa yeiyo yakaderera-voltage simba rekugovera sisitimu SPD II chigadzirwa, inogonesa kugadzira impulse voltage (1.2/50μs) uye impulse ikozvino (8/20μs), inoshandiswa pagiredhi III bvunzo uye kudzikisira voltage bvunzo. yeSPD uye zvikamu.