Deck 15: Special Transformer Applications

Question 1

The primary and secondary coils of the constant-current transformer are both placed on a(n) ____________________ steel laminated core.

Answer 1

silicon

Question 2

A nearly constant voltage can be maintained on long distribution circuits by compensating for the voltage losses due to varying load conditions.

Answer 2

True

Question 3

What is the current that most series street lighting circuits require?

Answer 3

Most series street lighting circuits require a current of 6.6 A.

Question 4

Small and inexpensive devices are required to measure high voltages and currents directly.

Question 5

Instrument transformers are used with instruments and relays to measure and control ac circuits.

Question 6

The construction of the three-phase induction voltage regulator is similar to that of the single-phase regulator.

Question 7

A(n) ____________________ transformer has a sliding brush that can provide any voltage from 0 to full output voltage.

Question 8

List two typical uses of autotransformers.

Question 9

Street lamp circuits may be connected in series or in ____________________.

Question 10

Discuss limitations on autotransformers.

Question 11

When the three-phase stationary primary windings are energized, a uniform magnetic field is set up inside the stator core.

Question 12

A(n) ____________________ transformer takes power into its primary winding at a constant voltage and a variable current.

Question 13

The ratio of two power values may be called the ____________________ ratio for the two-wattmeter Method.

Question 14

On what does the voltage of a circuit depend?

Question 15

Discuss an induction voltage regulator.