Đồng hồ đo điện và công suất Contrel EMM-R3VA
Combined voltmeter, ammeter, three phase, 3 phase voltage values,
3 phase to phase voltage values, 3 phase current values, 3 maximum phase voltage values, 3 maximum phase to phase
voltage values, 3 maximum phase current values, 3 minimum phase voltage values,
3 minimum phase to phase voltage values...