An electrosurgical system comprising: an electrosurgical generator arranged to supply radiofrequency (RF) energy through an electrosurgical instrument that can be connected removably thereto； wherein the electrosurgical instrument comprises: a first jaw； a second jaw opposite the first jaw, wherein the first and second jaws are pivotally arranged to grip tissue between the first and second jaws； a first electrode connected to the first jaw； and a second electrode connected to the second jaw, wherein the first and second electrodes of the first and second jaws are arranged to transmit radiofrequency energy between the first and second electrodes to fuse and cut tissue between the first and second jaws with central portions of the first and second jaws facing each other and which are free of electrodes, wherein a central portion of the first jaw comprises an insulating part that faces a central portion of the second jaw, characterized in that the insulating part is a pad of compatible rest and because the second jaw comprises a central projecting part that corresponds to the position of the padUn sistema electroquirúrgico que comprende: un generador electroquirúrgico dispuesto para suministrar energía de radiofrecuencia (RF) a través de un instrumento electroquirúrgico conectable de forma extraíble al mismo； en donde el instrumento electroquirúrgico comprende: una primera mandíbula； una segunda mandíbula opuesta a la primera mandíbula, en donde la primera y segunda mandíbulas se disponen de forma pivotante para agarrar tejido entre la primera y segunda mandíbulas； un primer electrodo conectado a la primera mandíbula； y un segundo electrodo conectado a la segunda mandíbula, en donde el primer y segundo electrodos de la primera y segunda mandíbulas se disponen para transmitir energía de radiofrecuencia entre el primer y segundo electrodos para fusionar y cortar tejido entre la primera y segunda mandíbulas con porciones centrales de la primera y segunda mandíbulas enfren
