| Battery Switch : The BATTERY switch START or RUN
position permits the battery to supply DC power to the power
distribution system or permits the battery to be charged by the starter/generator. The RUN position also activates the inverter.
The OFF position isolates the battery and inverter from the
systems. |
| Generator Switch : The GEN switch ON position
permits the starter-generator to supply DC power to the primary
bus [P], PWR XFR BUS [E] [M]. The RESET
position will reset the starter-generator. When the switch is
released, it will return to OFF. The OFF position
isolates the generator from the system and allows the starter-generator
to function as a starter. The circuit is protected by the GEN
BUS RESET and GEN FIELD circuit breakers. |
| Alternator Switch : The ALTNR switch energizes the
alternator to supply power to the AC buses and transformer
rectifier unit (TRU) when in ON position. It
deactivates and/or resets the alternator when in the OFF RESET position.
Any time the alternator is inoperative or the ALTNR switch
is in OFF RESET position, the inverter supplies AC power. |
| Nonessential Bus Switch : The NONESNTL BUS switch
functions only when the battery is the sole source of DC power to
the helicopter. The NORMAL position supplies DC
power to the essential DC bus. The manual position supplies
DC power to both the essential and non-essential buses.
When either the generator [P] or TRU [E] [M] are
operating, the essential and non-essential buses both receive DC
power regardless of the position of the non-esntl bus switch. |
