Abstract: The present invention relates to a balancing circuit for systems comprising at least a first and a second transformers, where the transformers' primary sides are connected to one another, and the transformers' secondary sides also are connected to one another, characterized in that the balancing circuit comprises a branch for connection between one terminal on the secondary side of the first transformer and the corresponding terminal on the secondary side of the second transformer, the branch having a significant impedance such that the voltage in the secondary sides of said transformers is forced to be substantially equal. The invention comprises also a method for performing balanced operation of a system comprising at least a first and a second transformer.