Deck 11: Operation of Three-Phase Alternators

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Question
In industrial applications, alternators are driven by various types of ____________________.
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Question
When two alternators are in step, they are said to be in ____________________.
Question
When paralleling alternators, set the field rheostat (R2) of alternator G2 to the minimum resistance position.
Question
What values must be nearly equal before alternators can be paralleled?
Question
For applications on ships, alternators are often driven by DC motors.
Question
In the two bright, one dark method, any two connections from the synchronizing lamps are crossed after the alternators are connected and tested for proper ____________________.
Question
A(n) ____________________ is recommended for synchronizing two alternators.
Question
Where is reverse power a situation of particular concern?
Question
How can you check that the phase rotation of both AC generators being synchronized is the same?
Question
Two alternators are paralleled whenever the power demand of the load circuit is less than the power output of a single alternator.
Question
In practice, the ____________________ of the incoming generator is 1 to 2 Hz higher than that of the on-line generator.
Question
What occurs if one alternator attempts to pull out of synchronism?
Question
How does a generator act as a motor running at no load?
Question
In practice, the voltage of the incoming generator is usually slightly higher than that of the other operating generator.
Question
The two bright, one dark method of synchronizing alternators has certain disadvantages and is seldom used.
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Deck 11: Operation of Three-Phase Alternators
1
In industrial applications, alternators are driven by various types of ____________________.
prime movers
2
When two alternators are in step, they are said to be in ____________________.
synchronism
3
When paralleling alternators, set the field rheostat (R2) of alternator G2 to the minimum resistance position.
False
4
What values must be nearly equal before alternators can be paralleled?
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5
For applications on ships, alternators are often driven by DC motors.
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6
In the two bright, one dark method, any two connections from the synchronizing lamps are crossed after the alternators are connected and tested for proper ____________________.
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7
A(n) ____________________ is recommended for synchronizing two alternators.
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8
Where is reverse power a situation of particular concern?
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9
How can you check that the phase rotation of both AC generators being synchronized is the same?
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10
Two alternators are paralleled whenever the power demand of the load circuit is less than the power output of a single alternator.
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11
In practice, the ____________________ of the incoming generator is 1 to 2 Hz higher than that of the on-line generator.
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12
What occurs if one alternator attempts to pull out of synchronism?
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13
How does a generator act as a motor running at no load?
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14
In practice, the voltage of the incoming generator is usually slightly higher than that of the other operating generator.
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15
The two bright, one dark method of synchronizing alternators has certain disadvantages and is seldom used.
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