Welding and/or cutting system (101; 201), comprising a generator, a welding and/or cutting torch (1; 110; 210). a control unit and an actuator unit (150; 250) suited to be activated by an operator for the purpose of carrying out a welding and/or cutting operation through the activation of said generator, wherein said actuator unit (150; 250) comprises: - a movable actuator element, suited to be activated by said operator; - first generation means suited to generate a signal (S1; S") and activated by said movable element; said actuator unit (150; 250) is associated to said welding and/or cutting torch ( 110; 210), the actuator unit (150; 250) being configured in such a way that it can be activated with one's hand and/or fingers; characterized in that said actuator unit (50; 150; 250) further comprises - wireless signal transmission unit; a power supply unit suited to power said transmission unit, said power supply unit comprising an electric energy generator, and in that said actuator unit (150; 250) is associated to said welding and/or cutting torch (110; 210), and said electric energy generator transforms the mechanical energy produced by the movement of said movable element, which causes a variation in the magnetic flow in a winding, into electric energy, wherein during activation of the movable actuator element a voltage pulse is generated that is capable of supplying power to the control unit and to the wireless signal transmission unit, wherein during release of the movable actuator element a voltage pulse is generated that is capable of supplying power to the control unit and to the wireless signal transmission unit. a welding and/or cutting torch (1; 110; 210). a control unit and an actuator unit (150; 250) suited to be activated by an operator for the purpose of carrying out a welding and/or cutting operation through the activation of said generator, wherein said actuator unit (150; 250) comprises: - a movable actuator element, suited to be activated by said operator; - first generation means suited to generate a signal (S1; S") and activated by said movable element; - a movable actuator element, suited to be activated by said operator; - first generation means suited to generate a signal (S1; S") and activated by said movable element; said actuator unit (150; 250) is associated to said welding and/or cutting torch ( 110; 210), the actuator unit (150; 250) being configured in such a way that it can be activated with one's hand and/or fingers; characterized in that said actuator unit (50; 150; 250) further comprises - wireless signal transmission unit; - wireless signal transmission unit; a power supply unit suited to power said transmission unit, said power supply unit comprising an electric energy generator, and in that said actuator unit (150; 250) is associated to said welding and/or cutting torch (110; 210), and said electric energy generator transforms the mechanical energy produced by the movement of said movable element, which causes a variation in the magnetic flow in a winding, into electric energy, wherein during activation of the movable actuator element a voltage pulse is generated that is capable of supplying power to the control unit and to the wireless signal transmission unit, wherein during release of the movable actuator element a voltage pulse is generated that is capable of supplying power to the control unit and to the wireless signal transmission unit.