An electrosurgical system for generating high-frequency alternating current for an ablation of body tissue, containing a high-frequency voltage supply unit which is or is to be electrically connected to a first and second electrode, and which is configured to supply the electrodes with a high-frequency alternating voltage. The electrosurgical system further includes a feedback unit which is electrically connected to the first and second electrodes and which is configured to generate and transmit an output signal dependent on the electrical resistance between the first and second electrodes. The electrosurgical system also includes a control unit that is configured to control the high-frequency voltage supply unit in such a way as to be able to automatically switch between at least one first and one second operating mode.
