Electrical System

Question 1

Battery volatage/amps

Answer 1

One 24-volt, 15.5 amp-hour lead acid OR 12-volt, 35 amp-hour battery

Question 2

Alternator voltage/amps

Answer 2

Two 28-volt, 55amp OR 14-volt, 60 amp belt driven alternators

Each alternator controlled by separate voltage regulators

Question 3

Does the aircraft have a Bus Tie Fuse?

Answer 3

Some of them after ME103 - provides equal load sharing between alternators

Question 4

How does the load compacity of the alternators work?

Answer 4

Self-excitation. Directly correlated to engine RPMs
1200-1400rpms: Approx 50% load
2300rpms: Approx 80%

Question 5

When will the undervoltage light ignite?

Answer 5

Anytime the alternator voltage is 4+/- 0.1 Volts (28-volt system) OR 2+/- 0.1 Volts (14-volt system) below the BUS voltage