Kufotokozera Kwachidule:

M4 mndandanda wowumbidwa mlandu wophwanyira, ndi AC 50/60Hz, ovotera kutchinjiriza voteji 690 V (M4-125 500V), ovoteledwa opaleshoni voteji AC 690V kapena m'munsimu, ovotera ntchito panopa 12.5-1600A, kugawira mphamvu ya magetsi ndi infrequent chigawo kupanga ndi kusweka. Ma circuitbrea kers amaperekedwa ndi ntchito yachitetezo pakulemedwa komanso kufupikitsa komanso kutsika. Oyendetsa madera amatsatira muyezo wa IEC60947-2. Ophwanya magetsi ndi otetezera kawiri (Mu m = 250A kapena pamwamba), dera lolamulira la zipangizozo limasiyanitsidwa ndi dera lalikulu, ndipo siliyenera kutsegula chivundikiro cha woyendetsa dera poika zowonjezera.