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What is the function of a relay in a power system?

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Question: What is the function of a relay in a power system?

Options:

  1. To measure voltage
  2. To provide feedback control
  3. To detect faults and initiate circuit interruption
  4. To convert AC to DC

Correct Answer: To detect faults and initiate circuit interruption

Solution: 

Relays are protective devices that detect faults in the system and initiate the operation of circuit breakers to isolate the faulty section.

What is the function of a relay in a power system?

Practice Questions

Q1
What is the function of a relay in a power system?
  1. To measure voltage
  2. To provide feedback control
  3. To detect faults and initiate circuit interruption
  4. To convert AC to DC

Questions & Step-by-Step Solutions

What is the function of a relay in a power system?
  • Step 1: Understand that a relay is a device used in power systems.
  • Step 2: Know that relays monitor the electrical system for any problems or faults.
  • Step 3: When a fault is detected, the relay sends a signal.
  • Step 4: This signal tells a circuit breaker to turn off the power in the faulty area.
  • Step 5: By isolating the faulty section, the relay helps protect the rest of the power system.
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