DOC AIRBUS | AMM A320FIGNITION POWER SUPPLY - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. Component Location
** ON A/C NOT FOR ALL 
Ignition System - (Igniter)- The ignition exciter is installed on the fan case assembly at the 5 o'clock position.
| FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||||
| 4000JH | IGNITION EXCITER | 400 | 74-11-51 | ||
2. Component Description
A. Ignition Exciter
(1) The ignition exciter changes 115 VAC aircraft electrical power from the aircraft to the high tension voltage necessary for igniter operation.
(2) The ignition exciter is attached (with anti-shock mounts) to a bracket on the fan case at the 5 o'clock position.
(3) The ignition exciter supplies 5 kilovolts to the igniter to ignite the fuel/air mixture in the combustor.
(4) The electronic ignition exciter has an energy delivery capacity of 0.9 joules/channel. Fan compartment air flows over the hermetically sealed exciter box to provide cooling for the unit.
(5) The exciter duty cycle varies between 1 spark/sec. to 3 spark/sec. An EEC command voltage activates each exciter channel.
(6) The EEC can command either exciter channel from both exciter inputs.