IMPROVED SYSTEM FOR SUPPLYING POWER TO AN AIRCRAFT

A power supply system, of an aircraft, configured to supply electrical energy to on-board electrical devices including at least an electrical sub-circuit of the high-voltage DC type, an electrical sub-circuit of the low-voltage AC type, and an electrical sub-circuit of the low-voltage DC type. The system additionally including a high-voltage battery switching circuit, the system being such that every power supply line of said low-voltage DC sub-circuit, which power supply line is independent of said switching circuit, has no low-voltage battery. Advantageously, it is thus possible to avoid battery redundancy that is detrimental to the weight of the aircraft and leads to its electrical system being complex.