DOC AIRBUS | AMM A320FAC ESSENTIAL GENERATION SWITCHING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
These circuits control the supply of the AC essential distribution network.
They enable:
** ON A/C NOT FOR ALL These circuits control the supply of the AC essential distribution network.
They enable:
- its normal supply in normal flight configuration,
- transfer of the supply in case of AC BUS 1 loss,
2. Component Location
** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C ALL | |||||
| 3XC | CNTOR-AC ESS BUS SWITCHING | 106VU | 125 | 24-25-55 | |
| 11XC | P/BSW-ELEC/AC ESS FEED | 35VU | 210 | 24-25-00 | |
3. Operation
Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL
Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL
Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL
Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL
Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL
AC Essential Busbar (AC ESS BUS) and AC Sheddable Essential Busbar (AC SHED ESS BUS) are normally supplied in series from AC BUS 1 through respectively AC ESS BUS TIE CONTACTOR (3XC1) and AC SHED ESS BUS CONTACTOR (8XH).
In the event of AC BUS 1 loss, AC ESS BUS is no longer supplied, which causes amber MASTER CAUT light to come on.
Amber "FAULT" legend illuminates on AC ESS FEED pushbutton switch located on the ELEC panel 35VU.
On the lower ECAM DU, ELEC page is displayed, "AC ESS" becomes amber, synoptic is modified.
When the crew releases the AC ESS FEED pushbutton switch, the white ALTN legend comes on (the FAULT legend stays on if the AC ESS bus stays not supplied).
On the lower ECAM DU, the AC ESS becomes green again and the synoptic is modified.
Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL Loss of AC Normal BUS 1XP - Block Diagram Control and Indicating Circuits ** ON A/C NOT FOR ALL In the event of AC BUS 1 loss, AC ESS BUS is no longer supplied, which causes amber MASTER CAUT light to come on.
Amber "FAULT" legend illuminates on AC ESS FEED pushbutton switch located on the ELEC panel 35VU.
On the lower ECAM DU, ELEC page is displayed, "AC ESS" becomes amber, synoptic is modified.
NOTE: MASTER CAUT light + single chime + amber message on the upper ECAM DU confirm this failure.
To recover AC ESS busses, supplied by the AC BUS 2, the crew must release the AC ESS FEED pushbutton switch. If, after 3 seconds, the creaw did not release the AC ESS pushbutton switch, the auto switching system is set on. When the crew releases the AC ESS FEED pushbutton switch, the white ALTN legend comes on (the FAULT legend stays on if the AC ESS bus stays not supplied).
On the lower ECAM DU, the AC ESS becomes green again and the synoptic is modified.