Battery Power
Single Battery Option
A 24 volt nickel–cadmium battery is located in the electronics compartment. The battery can
supply part of the DC system. Battery charging is automatically controlled. A fully charged
battery has sufficient capacity to provide standby power for a minimum of 30 minutes.
Battery voltage range is 22–30 volts.
DC busses powered from the battery following a loss of both generators are:
- Battery bus.
- DC standby bus.
- Hot battery bus.
- Switched hot battery bus.
The switched hot battery bus is powered whenever the battery switch is ON. The hot
battery bus is always connected to the battery. There is no switch in this circuit. The
battery must be above minimum voltage to operate units supplied by this bus. An amber
BAT DISCHARGE light comes on when excessive battery discharge is detected.
Dual Battery Option
Two 24 volt nickel–cadmium batteries, main and auxiliary, are located in the electronics
compartment. The batteries can supply part of the DC system. The auxiliary battery
operates in parallel with the main battery when the battery is powering the standby system.
At all other times, the auxiliary battery is isolated from the power distribution system. Battery
charging is automatically controlled. Two fully charged batteries have sufficient capacity to
provide standby power for a minimum of 60 minutes. Battery voltage range is 22–30 volts.
