Current transformer and method for converting a conductor current flowing in an electrical conductor to an output signal

A current transformer arrangement, comprising:

• (a) a current sensor having an input terminal connected with a conductor carrying a conductor input current, and an output terminal at which is produced a first output voltage that is proportional to the conductor input current;
• (b) a first processing branch including a voltage calculating device connected with said current sensor output terminal for calculating an effective voltage value of said first output voltage, said first processing branch having a first output terminal;
• (c) a second processing branch including a polarity detecting device having an input terminal connected with said current sensor output terminal, said second processing branch having a second output terminal at which a polarity signal is produced having:
• (1) a first polarity when the conductor input current is either an alternating current, a hybrid current, or a direct current flowing in one direction, and
• (2) a second polarity opposite to said first polarity when the conductor input current is a direct current flowing in the opposite direction;
• and
• (d) a multiplier device having a first input connected with said first processing branch first output terminal, and a second input terminal connected with said second processing branch second output terminal, said multiplier device being operable to modify said effective voltage value to produce a signed effective voltage value having a polarity corresponding with the polarity of said polarity signal.