A current controlling transducer comprising a circuit board, one or more current sensors, at least one microprocessor on the circuit board, and a connector with connection terminals connected to the circuit board and configured to be connected, via an external connector or an additional circuit board, to a power conversion system and a higher level controller external to the transducer, wherein each current sensor comprises a primary conductor with input and output terminals (6a, 6b) configured to be connected to an electrical phase of the power conversion system, and a magnetic field detector configured to measure the magnetic field generated by a primary current flowing in the primary conductor, each current sensor being connected to a controller of the microprocessor, the microprocessor further comprising a communication interface configured to communicate with the higher level controller via the connections terminals of the connector, and a memory comprising a configuration data store configured to store information concerning a configuration of the power conversion system, wherein the microprocessor is connected to one or more control signal connection terminals of the connector configured to be connected to the power conversion system for control thereof based on set point current values and the one or more primary currents measured by the current sensors, wherein the set point current values are provided by the higher level controller, the power conversion system, or the memory or are computed and provided by the controller based on the information concerning the configuration of the power conversion system stored in the configuration data store, and wherein the primary conductor, the magnetic field sensor, the microprocessor, the circuit board and the connector are directly integrated together to form a single unit connectable to the power conversion system and a controller of the power conversion system. wherein each current sensor comprises a primary conductor with input and output terminals (6a, 6b) configured to be connected to an electrical phase of the power conversion system, and a magnetic field detector configured to measure the magnetic field generated by a primary current flowing in the primary conductor, each current sensor being connected to a controller of the microprocessor, the microprocessor further comprising a communication interface configured to communicate with the higher level controller via the connections terminals of the connector, and a memory comprising a configuration data store configured to store information concerning a configuration of the power conversion system, wherein the microprocessor is connected to one or more control signal connection terminals of the connector configured to be connected to the power conversion system for control thereof based on set point current values and the one or more primary currents measured by the current sensors, wherein the set point current values are provided by the higher level controller, the power conversion system, or the memory or are computed and provided by the controller based on the information concerning the configuration of the power conversion system stored in the configuration data store, and wherein the primary conductor, the magnetic field sensor, the microprocessor, the circuit board and the connector are directly integrated together to form a single unit connectable to the power conversion system and a controller of the power conversion system.