... and Working Principle1.1 The SCD48, SCD72, SCD96 series square instruments are with electromagneticsystem and repellency structure. ... printing dial and transparentglass cover.1.2 SCD72,SCD96 series DC ammeter, voltmeter, frequency meter, active/reactivepower ... 220V,380VClass 1.0SCD72-HzActive/reactive power meterSCD96-W/var100v,220v,380-380kV/100V5A,5A-10KA/ ... COSΦ3.Shape and Mounting dimensions Unit :mm