The cabinet has an electronic rectifier/battery charger with an output of 24 VDC and 20A. The power supply to feed this equipment will be a 3 phase supply from the branch circuit of the auxiliary services. It will protected by a 6A miniature circuit breaker. The rectifier is able to be supplied with a voltage range from 380 to 480VAC and with a frequency range from 50 to 60 Hz.