Inkcazo emfutshane:

I-voltage elinganisiweyo yokukhululwa kwe-undervoltage shunt (Ue) yi-230V okanye i-400V. Apho i-external

i-voltage iyatshintshatshintsha phakathi kwe-35% ye-Ue, ukukhululwa kwe-shunt kunokuthintela i-circuit-breaker kwi-

ukuvala; kwaye apho i-voltage yangaphandle itshintshatshintsha phakathi kwe-85% Us kunye ne-110% Us, i-shunt

ukukhululwa kunokuqinisekisa ukuba i-circuit breaker iyavalwa.