- An assembly comprising: an electromechanical relay including an actuation portion including a relay coil for actuating at least one switch; and a system for monitoring an electromechanical relay, the system comprising: at least one sensor adapted to measure an operating condition of the electromechanical relay, wherein the sensor is arranged adjacent or attached to the electromechanical relay; at least one controller communicatively connected to the at least one sensor and at least one memory, wherein the at least one controller is adapted to store the measured operating condition in the at least one memory; and at least one transmitter, operatively connected to the at least one controller, wherein the transmitter is adapted to transmit the stored measured operating condition to a remote device, characterized in that the system further comprises at least one power source (46, 46a, 46b, 46c) adapted to power at least one element chosen from the at least one sensor, the at least one controller and the at least one transmitter, wherein the at least one power source (46, 46a, 46b, 46c) and the at least one sensor share at least one detection portion, wherein the detection portion is selected from: a parallel connection to the terminals (17a, 17b) 2. of the relay coil, a sensor coil arranged in order to generate a current when the coil of the relay is activated, an electromechanical generator to produce electricity form mechanical vibrations of the relay caused by a transition of the switch, a voltage sensor detecting the voltage applied to the relay coil, and a current sensor detecting the current applied to the relay coil. an electromechanical relay including an actuation portion including a relay coil for actuating at least one switch; and a system for monitoring an electromechanical relay, the system comprising: at least one sensor adapted to measure an operating condition of the electromechanical relay, wherein the sensor is arranged adjacent or attached to the electromechanical relay; at least one controller communicatively connected to the at least one sensor and at least one memory, wherein the at least one controller is adapted to store the measured operating condition in the at least one memory; and at least one transmitter, operatively connected to the at least one controller, wherein the transmitter is adapted to transmit the stored measured operating condition to a remote device, characterized in that the system further comprises at least one power source (46, 46a, 46b, 46c) adapted to power at least one element chosen from the at least one sensor, the at least one controller and the at least one transmitter, wherein the at least one power source (46, 46a, 46b, 46c) and the at least one sensor share at least one detection portion, wherein the detection portion is selected from: a parallel connection to the terminals (17a, 17b) 2. of the relay coil, a sensor coil arranged in order to generate a current when the coil of the relay is activated, an electromechanical generator to produce electricity form mechanical vibrations of the relay caused by a transition of the switch, a voltage sensor detecting the voltage applied to the relay coil, and a current sensor detecting the current applied to the relay coil. at least one sensor adapted to measure an operating condition of the electromechanical relay, wherein the sensor is arranged adjacent or attached to the electromechanical relay; at least one controller communicatively connected to the at least one sensor and at least one memory, wherein the at least one controller is adapted to store the measured operating condition in the at least one memory; and at least one transmitter, operatively connected to the at least one controller, wherein the transmitter is adapted to transmit the stored measured operating condition to a remote device, characterized in that the system further comprises at least one power source (46, 46a, 46b, 46c) adapted to power at least one element chosen from the at least one sensor, the at least one controller and the at least one transmitter, wherein the at least one power source (46, 46a, 46b, 46c) and the at least one sensor share at least one detection portion, wherein the detection portion is selected from: a parallel connection to the terminals (17a, 17b) 2. of the relay coil, a sensor coil arranged in order to generate a current when the coil of the relay is activated, an electromechanical generator to produce electricity form mechanical vibrations of the relay caused by a transition of the switch, a voltage sensor detecting the voltage applied to the relay coil, and a current sensor detecting the current applied to the relay coil.