Sifam 75mV Ammeter Measuring Shunt 75mV Shunts Provide an accurate DC millivolt signal to drive ammeter indicators, overload protection and control devices, especially for higher amperage. They supply a voltage drop proportional to the DC current which is measured. The current passing through the shunt produces a proportional voltage drop. A moving coil instrument connected to shunt measures the voltage drop across the shunt terminals. Extension of DC current measuring ranges of moving-coil ammeters Shunts of 1-25A ranges are fixed on an isolating base The isolating base is adapted to be assembled on a 35mm DIN rail Shunts