Calculators›Electrical engineering›Ammeters and shunts

Electrical engineering

Ammeters and shunts

Ammeter range extension, shunt sizing, and meter movement current.

Electrical engineering

Ammeter shunt resistance

Rsh = RaIa / (I − Ia)→Electrical engineering

Shunted ammeter total current

I = Ia(1 + Ra / Rsh)→Electrical engineering

Ammeter movement current

Ia = IRsh / (Ra + Rsh)→Electrical engineering

Ammeter range multiplier

m = I / Ia = 1 + Ra / Rsh→