Current Transformer

Explain the role of a current transformer (CT) in an electrical system.

• To convert high current levels to low current levels
• To convert low current levels to high current levels
• To measure voltage levels
• To convert DC current to AC current

What happens when the secondary winding of a current transformer (CT) is opened?

• The primary winding will draw more current
• The primary winding will draw less current
• The primary winding will remain unaffected
• The CT will stop working

Which of the following is an advantage of using a current transformer (CT)?

• It provides electrical isolation between primary and secondary circuits
• It increases the voltage level of the current
• It can measure AC and DC currents equally well
• It can be used as a voltage transformer

How does a current transformer (CT) ensure the safety of equipment and personnel?

• By isolating the high voltage circuit from the low voltage circuit
• By increasing the voltage level of the current
• By decreasing the voltage level of the current
• By measuring the voltage level of the current

What is the output of a current transformer (CT)?

• Voltage
• Current
• Power
• Frequency

How can the accuracy of a current transformer (CT) be improved?

• By increasing the number of turns in the secondary winding
• By using a core with a larger cross-sectional area
• By operating at a lower temperature
• By reducing the number of turns in the primary winding

Which of the following is a common application of current transformers (CT)?

• Metering and protection of electrical equipment
• Generating electrical power
• Controlling electrical circuits
• Storing electrical energy

What is the purpose of a burden resistor in a current transformer (CT) circuit?

• To match the impedance of the measuring device with the secondary winding
• To increase the voltage level of the current
• To reduce the voltage level of the current
• To increase the current flowing through the primary winding