I-SPL ingumkhiqizi we-switchgear wase-China kanye nomthengisi, ongahlinzeka nge-voltage ephansi ama-switchgear, ama-switchgear ensimbi ane-AC avalelwe kanye nama-switchgear ensimbi e-AC aphakathi nendawo ngentengo ephansi, ngesisekelo somshwalense wekhwalithi. Sibhekene nokumaketha komhlaba wonke, ngakho-ke pls xhumana nathi uma udinga nje noma ngabe ukuphi.