State the need for multiple generators in large aircraft?

Question

State the need for multiple generators in large aircraft?

Answer 1

the chance of multiple electrical failures maybe? ya think?

Answer 2

To power all the aircraft users as in our A340 GEIC (Ground Engineer's Initial Course) . While on flight losing one generator the whole aircraft is powered losing two generators half of the aircraft is powered, losing three generators you're powering only the essential buses or essential users. Losing all four generators (engine still running-pure genrator failure) the RAT and the CSM/G constant speed generator/motor with its 4.5KVA and battery powers the essential instruments necessary for landing.

Answer 3

Safety back up in case when a generator fails.Normally, these  days there is a concept of triple redundant systems, where you have two more back ups if one fails. With two out of three failing, the last one will handle the most critical systems to ensure flight is maintained.

Answer 4

Redundancy and risk management, stagered risk of losing electrical power

Answer 5

in case one fails there is a backup and to satisfy legal requirements with regard to MEL's etc.