Detailed Product Description Name: Moving Iron Voltmeter with change over Switch Type: SD-96, SD- ... : L1-L2, L1-L3, L2-L3(OFF Position is available on request).3 phase 4 wire Measuring range: 60V/100V, 80 ... , L1-N, L2-N, L3-N(OFF Position is available on request)Mounting: SF series is flush mounting with bracket.