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| L-1011 Trainer: AC and DC STBY Power from Battery |
Finished the L-1011 AC Standby (STBY) and DC STBY power fail-over to the on-board Battery yesterday evening. On the actual aircraft, once transferred to Battery power, the standby buses are alive for about 30 minutes before the Battery is depleted.
Normally, the DC STBY bus receives powered from the DC Essential bus and the AC STBY bus is powered by the AC Essential bus. The AC and DC STBY bus are the last resort to keep the aircraft operational in case of a complete loss of primary electrical systems. If the respective Essential power busses fail, the STBY busses are switched to the on-board Battery. AC power is created form the on-board Battery via a DC to 115V/400Hz Inverter. Watch the short demonstration video below and you will see the system in action.
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