A safety system detecting failures occurring in an high voltage cable of an electric and hybrid vehicles; comprising - an energy storage means wherein the high power required for the electric and hybrid vehicle is supplied, - at least one high voltage device each connected with a high voltage cable to the energy storage means, which at least one high voltage cable enables the electric energy to be transferred to the associated high voltage device from the energy storage means, - at least one first connection member which enables the connection of each high voltage cable to the energy storage means, - a generator which is located inside the energy storage means, enables the load transfer by creating potential difference and both ends of which are connected to the at least one high voltage cable, - at least one switching member which enables the electric energy wanted to be transferred anytime from the generator to the at least one high voltage cable or to cut the said electric energy off, - a power electronic circuit which is located in each high voltage device, enables the electric energy transferred via the associated high voltage cable to be converted efficiently into electrical output form desired for the high voltage device to be operated, and - at least one second connection member which enables the connection of the high voltage cable with the associated high voltage device, - a transmitter which is located inside each of the at least one high voltage device in a way isolated from the associated high voltage cable, such as to protect the transmitter from disturbances on the voltage cable, and which is adapted to send a signal through the associated high voltage cable, - a receiver which is located in the energy storage means in a way isolated from the at least one high voltage cable, such as to protect the receiver from disturbances on the at least one high voltage cable, and which is adapted to receive the signal sent from each of the at least one transmitter and to detect that there is a failure in a device or in the high voltage cable belonging to said device if the signal does not reach the receiver from the at least one transmitter by processing the signal sent by the at least one transmitter, and - an energy management component which is located in the energy storage means between the receiver and the at least one switching member and adapted to stop the high voltage output from the energy storage means to the failed device or high voltage cable belonging to said device by turning off the at least one switching member when it receives an information from the receiver that there is a failure. - an energy storage means wherein the high power required for the electric and hybrid vehicle is supplied, - at least one high voltage device each connected with a high voltage cable to the energy storage means, which at least one high voltage cable enables the electric energy to be transferred to the associated high voltage device from the energy storage means, - at least one first connection member which enables the connection of each high voltage cable to the energy storage means, - a generator which is located inside the energy storage means, enables the load transfer by creating potential difference and both ends of which are connected to the at least one high voltage cable, - at least one switching member which enables the electric energy wanted to be transferred anytime from the generator to the at least one high voltage cable or to cut the said electric energy off, - a power electronic circuit which is located in each high voltage device, enables the electric energy transferred via the associated high voltage cable to be converted efficiently into electrical output form desired for the high voltage device to be operated, and - at least one second connection member which enables the connection of the high voltage cable with the associated high voltage device, - a transmitter which is located inside each of the at least one high voltage device in a way isolated from the associated high voltage cable, such as to protect the transmitter from disturbances on the voltage cable, and which is adapted to send a signal through the associated high voltage cable, - a receiver which is located in the energy storage means in a way isolated from the at least one high voltage cable, such as to protect the receiver from disturbances on the at least one high voltage cable, and which is adapted to receive the signal sent from each of the at least one transmitter and to detect that there is a failure in a device or in the high voltage cable belonging to said device if the signal does not reach the receiver from the at least one transmitter by processing the signal sent by the at least one transmitter, and - an energy management component which is located in the energy storage means between the receiver and the at least one switching member and adapted to stop the high voltage output from the energy storage means to the failed device or high voltage cable belonging to said device by turning off the at least one switching member when it receives an information from the receiver that there is a failure.