Active ground current reduction device

A device to be inserted between a grounded poly-phase external voltage source and a load providing low insertion loss for differential mode currents and high insertion loss for ground currents, the device comprising:

• at least one voltage line for receiving at least voltage from the grounded poly-phase external voltage source, wherein the at least one voltage comprises a common mode voltage;
• a filter connected to each of the at least one voltage lines, the filter is configured to reduce the ground current from the load;
• a summing block configured to add the voltages from each of the at least one voltage lines to generate a total common mode voltage;
• a ground referenced controlled voltage source for generating a cancellation voltage equal to the total common mode voltage in response to the generation of the total common mode voltage,
• wherein the total common mode voltage is injected into the filter and substantially reduces the common mode voltage on each voltage line thereby substantially reducing ground currents associated with each common mode voltage on each voltage line.