Product Description Name 72 WattmeterModel > Analog meter > 967248 SeriesType SD-72 KWAccuray: Class1.5Voltage(three phase three wire): 100V, 110V, 220V(balance or unbalance)Voltage(three phase four wire): 100V, 110V, 220V, 380V, 415V(balance or unbalance)Current: If the current is over 10A, the current circuits have to be connected current transformer, which secondary current is 5A or 1A. If the current is not over 10A, it can be connected directly according to actual current.Frequency: 50Hz or 60HzSpecification: 100W, 200W.1KW, 2KW.1MW, 2MW.6MW