PHEP Generator Voltage Regulators

Question 1

The voltage output of an AC generator is controlled by

Answer 1

Varying the DC exciter voltage

Question 2

Three major differences between various voltage regulator systems is merely the method by which

Answer 2

Field circuit resistance, and current are controlled

Question 3

The voltage held by the vibrating type voltage regulator can be adjusted by

Answer 3

Varying the weight and adjusting the tension of the DC solenoid spring

Question 4

All of the following statements concerning the rheostat type voltage regulator, are true, except for

Answer 4

The primary purpose of the exciter field rheostat is to adjust a generator output voltage

Question 5

Wide range, excitation control is sometimes provided for in voltage regulator arrangements for large generators using separately excited main exciters by using

Answer 5

Wheaton bridge rheostat

Question 6

When the regulator control switch for the amplidyne voltage regulator is in the ON position effect is to:

Answer 6

-reduce the exciter field current
-lower the exciter voltage
-decrease the field current and terminal voltage of the AC generator
-all of the above

Question 7

In order to provide for proper division of reactive, current between AC generators, operating in parallel their voltage regulators in corporate a scheme called

Answer 7

Cross current compensation

Question 8

Of the following statements concerning synchronous condensers, which one is not true

Answer 8

The excitation range is maintained less than four AC generators to prevent loss of synchronism

Question 9

In the rheostat type voltage regulator when the terminal voltage of the AC generator starts to fall the action of the torque motor

Answer 9

Short circuit more of the higher resistance plates

Question 10

System stability can be maintained and a faster time response to load changed obtained by using voltage regulators equipped with

Answer 10

Both a feedback control system, and a electronically controlled separate motor