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Yellow LED (AMP), located on indicator R.H side, illuminates when battery is discharging. F. Alternator control Located on the R.H. side of the main switch, the alternator switch-breaker labeled "ALTr.FLD" controls and protects the energizing circuit of the alternator through the regulator. G. Battery relay Located on the R.H. side on the firewall, the battery relay is the element which allows bus bar supplying, when the main switch is ON. H. Keep alive fuse The keep alive fuse is located close to the battery relay. It protects the electric system between the battery relay and the fuse panel located on the L.H. side of the firewall. It supplies optional equipment or non-optional equipment such as the watch and the courtesy light using the battery. AFAD Validity : With front battery 24-30-00Page 3 (CA) SEP 04 4. OPERATION A. Alternator regulator Pre-MOD. 160 The LAMAR regulator and its built-in overvoltage relay provide the alternator voltage regulation and overvoltage protection. In the event of overvoltage, the regulator disconnects the alternator and the amber (red on U.K. aircraft) warning light labeled "ALTr" illuminates. In this case, only the battery powers the aircraft mains. Open and close the switch-breaker labeled "ALTr.FLD" to rearm the regulator. Post-MOD. 160 The ELECTROSYSTEMS regulator and its built-in overvoltage relay provide the alternator voltage regulation and overvoltage protection. In the event of overvoltage, the regulator disconnects the alternator and the amber (red on U.K. aircraft) warning light labeled "ALT"" illuminates. In this case, only the battery powers the aircraft mains. Open and close the switch-breaker labeled "ALTr.FLD" to rearm the regulator. In the event of undervoltage, the regulator illuminates the amber (red on U.K. aircraft) warning light labeled "ALT"'. A - LAMAR regulator - overvoltage relay B - Alternator C - Battery D - Keep alive fuse E - Battery relay F - ELECTROSYSTEMS regulator - overvoltage relay B
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