A transceiver device comprises a transceiver unit including an RF antenna, a serial communication port operatively coupleable with a further corresponding serial communication port of a protection and control device, a serial communication bus electrically connected between said serial communication port and said transceiver unit and having a transmission line and a reception line, a battery unit, and a feeding unit to feed said transceiver unit with a feeding voltage. The feeding unit comprises a first power supply stage electrically connected with said battery unit to harvest electric power from said battery unit and a second power supply stage electrically connected with the transmission line of said serial communication bus to harvest electric power from said transmission line, when said transmission line is said stand-by condition and takes an high-level voltage value.