Question 1 of 10
What is the primary function of an instrument transformer?
Instrument transformers reduce high voltage and current to levels that can be safely measured by standard meters.
Question 2 of 10
Which type of instrument transformer is connected in series with the power line?
A Current Transformer (CT) is connected in series to measure the current flowing through a line.
Question 3 of 10
Which type of instrument transformer is connected in parallel with the power line?
A Potential Transformer (PT) is connected in parallel (or across) the line to measure the voltage.
Question 4 of 10
What is the primary purpose of a Current Transformer (CT)?
A CT is designed to step down high currents to levels suitable for standard ammeters.
Question 5 of 10
What happens to the voltage in a CT?
A CT steps up the voltage, but primarily focuses on stepping down the current.
Question 6 of 10
What is the primary purpose of a Potential Transformer (PT)?
A PT is used to step down high voltages to measurable levels for voltmeters.
Question 7 of 10
What happens to the voltage in a PT?
A PT steps down the voltage to a safer level for measurement.
Question 8 of 10
Why should the secondary winding of a CT NEVER be opened while the primary is energized?
Opening the secondary of a CT under load can cause a dangerous high voltage due to the open circuit.
Question 9 of 10
Which of the following is a key difference between CTs and PTs regarding their secondary terminals?
PT secondaries can be open-circuited, whereas CT secondaries should never be open-circuited while the primary is energized.
Question 10 of 10
What type of transformer can be used for measurement of voltage?
Potential transformers are used to step-down the high voltage down to a safe level for measurement.
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