Chotsekereza ma circuit choteteza kutuluka kwa ma PG series chili ndi ntchito yoteteza ku kugwedezeka kwa kutuluka kwa ma volts, overload ndi short circuit ndipo chimagwiritsidwa ntchito makamaka m'ma circuit mpaka single phase 220V, atatu phase 380V. Chili ndi ntchito yodziyimira yokha yolipirira kutentha ndipo sichikhudzidwa ndi kusintha kwa kutentha kwa mlengalenga.
