Voltmeter with Selector Switch Accuracy:Class 1.5 3 phase 3 ... 90°SF-96-3, SF-72-3.A selector switch is built into the instrument for measurement of AC voltage ... 200V, 250V, 400V, 500V. 5) 3-Position: L1-L2, L1-L3, L2-L3(OFF Position is available on request).6) 3 ... 300/500V.7) 6-Position: L1-L2, L1-L3, L2-L3, L1-N, L2-N, L3-N(OFF Position is ... , welcome to contact us. Voltmeter with Selector Switch