Reactors Flashcards

1
Q

The current in transmission and distribution lines can lead or lag the voltage.

A

True

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2
Q

When a transmission line has a large component of capacitive reactance, the ? .

A

current will lead the voltage

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3
Q

Any electrical circuit component that opposes changes in current is defined as a(n) ? .

A

inductor

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4
Q

A reactor connected in parallel and used to counter phase-to-ground capacitance is called a ? reactor.

A

shunt

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5
Q

A transient-limiting reactor limits outrush and inrush currents when capacitor banks are switched and is also called a(n) ? reactor.

A

damping

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6
Q

To reduce current ripple (harmonics) on the DC side of a converter substation, ? reactors are essential.

A

smoothing

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7
Q

When reactors are energized, they become an electric magnet with the strength being proportional to the ? and the number of turns in the coil.

A

amperage flowing

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8
Q

Reactors are custom designed and constructed for the amount of fault current available on-site and for the amount or reactance needed.

A

True

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9
Q

Most substation ? reactors look like substation transformers and are about the same size.

A

Shunt

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10
Q

Substation reactors are passive pieces of equipment and are normally not energized.

A

False

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11
Q

The largest reactors are used in HVDC systems and are called ? reactors.

A

Smoothing

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12
Q

Capacitive reactance on a system can be countered by the addition of inductive reactance. Inductive reactance causes the ? .

A

current to lag behind the voltage

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13
Q

When an extra-high voltage line is energized, its inherent capacitance causes an unacceptable voltage drop on the end of the line, especially if the line is lightly loaded.

A

False

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14
Q

In an extra-high-voltage line, the current leads the voltage by ? .

A

90 degrees

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15
Q

The reactance of a(n) ? reactor can be varied by the amount of superimposed flux applied to the core.

A

saturable-core

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16
Q

There are ? types of reactors.

A

3

17
Q

Air-core reactors in substations are normally installed on insulators.

A

True

18
Q

Reactors in substations look like drums and can be quickly taken off-line because they are connected to the line through fused cutouts.

A

False