Patent ID: 8378663

Claim:
A current measurement device with electrical isolation, comprising: at least one electrical shunt ( 40 ) for permitting a current to be measured to flow therethrough, at least one input port for receiving an input signal (SI), connected to said shunt for receiving a signal representative of a current, an output port for outputting an output signal (SO) representative of said input signal representative of a current, and signal transfer means with electrical isolation for receiving an input signal and supplying said output signal, said transfer means comprising: at least one signal transformer ( 14 ) having at least one primary winding ( 15 , 15 A, 15 B, 151 , 152 , 153 , 154 ) for receiving a primary signal (SP, SP 1 , SP 2 , SP 3 , SP 4 ) representative of an input signal (SI, SIA, SIB, SI 1 , SI 2 , SI 3 , SI 4 ), switching means ( 16 , 16 A, 16 B, 161 , 162 , 163 , 164 , 31 , 32 ) for switching the input signal and providing a primary signal representative of said input signal to said primary winding, and control means ( 17 , 17 A, 17 B, 27 , 27 A, 27 B, 271 , 272 , 273 , 274 ) of the switching means, comprising a control signal input (SC) for receiving control signals during switching periods (TC), and an output electrically isolated from the control signal input and connected to said switching means ( 16 , 16 A, 16 B, 161 , 162 , 163 , 164 , 31 , 32 ) for commanding primary signal switching during said switching periods (TC), characterized in that said control means of the switching means comprise electromagnetic induction and/or capacitive connection coupling means coupled to said switching means.