Adjust A Voltage Regulator

Question 1

What size generator must be used in an aircraft electrical system if the connected electrical load is 30 amps, and there is no way of monitoring the generator output?

Answer 1

When monitoring is not practical, the total continuously connected electrical load must be no more than 80% of the generator output. This would require a generator with a rating of 37.5. Practically, a 40-amp generator would be installed

Question 2

What is meant by flashing the field of a generator?

Answer 2

Restoring the residual magnetism to the frame of the generator. This is done by passing battery current through the field coils in the direction it normally flows when the the generator is operating

Question 3

What is meant by paralleling the generators in a multi-engine aircraft?

Answer 3

Adjusting the voltage regulators so all the generators share the electrical load equally

Question 4

What are three types of voltage regulators used with aircraft generators?

Answer 4

Vibrator-type, carbon-pile type, and solid state-type

Question 5

How does a vibrator-type voltage regulator maintain a constant voltage?

Answer 5

When the voltage rises above the desired value, an electromagnetic relay opens and inserts a resistor in the generator field circuit, decreasing the field current and lowering the generator output voltage

Question 6

What two components are normally housed with a vibrator voltage regulator in a single-unit generator control?

Answer 6

A current limiter and a reverse-current cutout relay