voltage regulators Flashcards
The difference between no-load voltage and full-load voltage, expressed as the percentage of full-load voltage, is called ?
voltage regulators
Most electrical circuits do not need additional voltage regulation and control.
false
Improving the power factor in a circuit reduces the amount of ? or current needed to supply the load.
apparent power
Changing the ? is one way that voltage is regulated or controlled on a distribution line.
conductor size
The extent of the voltage drop depends on how much the current flow is impeded.
true
The voltage on a line fluctuates throughout the day in proportion to the ?
current flow
The formulas for power loss (I2R) and voltage drop (IR) indicate the relationship between line loss, voltage drop, and ?
amount of current flow
A piece of equipment that improves the power factor, reduces the reactance on the line, reduces the current, and improves the voltage is a(n) ?
capacitor
The voltage at the source of a distribution feeder must be high enough to provide an adequate input voltage to transformers and voltage regulators feeding customers downstream.
true
One way to reduce the capacitive reactance caused by the parallel conductors on very long transmission lines is to install ?
reactors
A substation transformer’s ? can boost or buck the voltage as needed while the transformer is in service and energized.
ultc
A no-load tap changer requires the load on the transformer to be reduced while the tap change is made.
false
An ampacity chart is not very useful in determining conductor size for a utility circuit.
true
On distribution circuits, larger conductors are used to reduce the voltage drop and ? on a circuit.
line loss
The leads going in and out of a set of voltage regulators do not need to be the same size as the main line conductors.
true
