... 2)low noise,low loss 3)anti-theft,strong overload ability,safe ZGS11 series of prefabricated substation applies to 12KV ring power supply, dual power ... supply or the terminal power supply system to use as the substation ... capacity KVA100,125,160,200,250,315,400,500,630,800,10003No-load tap changer ±2*2.5%4Vector group Yn115Rated ...