... .Frequency range: 50HZ3 phase 3 wire Measuring range: 100V, 150V 200V 250V 400V 500V 3-Position: L1-L2, L1-L3 ... , L2-L3(OFF Position is available on request)3 phase 4 wire ... Measuring range: 60V/100V, 80/150V 100/200V 150/250V, 250/400V 300/500V.6-Position ... L3, L1-N, L2-N, L3-N(OFF Position is available on request Moving Iron Voltmeter with change ...