A system consisting of various electrical components is desired. Required supply voltages to power these components include the following: three-phase 240 V AC (directly through the supply), 24 V DC, 5 V DC. Are there any reasons in particular one may be hesitant to regulate power through this single available three-phase 240 V AC supply? Is it dangerous to step down from such a high voltage to reach 5 V DC? Are there potential stability issues? Does it not make sense to convert between three-phase and single-phase power?
If this option is indeed viable in practice by what means could it be regarded as both safe and effective to provide voltage regulation? Could a power supply simply be connected directly to the 240 V AC source? Or possibly some sort of custom step-down transformer?
This is a convenient powering option since no other power supply outlet lies within proximity of the system.