Voltage Regulators Flashcards
A double-break switch has a construction classification of ? .
True
The difference between no-load voltage and full-load voltage, expressed as the percentage of full-load voltage, is called ? .
Voltage Regulation
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
It is important to keep the voltage to a customer within an acceptable range because high or low voltages can cause ? .
damage to customer equipment
If the employer requires that a voltage range of 91.7% to 105.8% be maintained on a 120/240 volt service, the minimum voltage one should read at a customer’s meter base before making voltage corrections is ? (rounded).
110/220
The formulas for power loss (I2R) and voltage drop (IR) indicate the relationship between line loss, voltage drop, and ? .
amount of current flow
One benefit to an electrical system when it is upgraded to improve the voltage on a line is that there is less energy waste.
True
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 voltages on transmissions lines are constant and do not need regulation.
False
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 ? .
Reactor
