Incazelo emfushane:

I-voltage elinganiselwe yokukhululwa kwe-undervoltage shunt (Ue) ingu-230V noma 400V. Lapho okwangaphandle

I-voltage ishintshashintsha phakathi kuka-35% Ue, ukukhululwa kwe-shunt kungavimbela isinqamuli sesifunda ukuthi sisuke

ukuvala; futhi lapho i-voltage yangaphandle ishintshashintsha phakathi kuka-85% Us no-110% Us, i-shunt

ukukhululwa kungaqinisekisa ukuvala i-circuit breaker.