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What is the primary function of a protective relay in a transmission line?

Practice Questions

Q1
What is the primary function of a protective relay in a transmission line?
  1. To regulate voltage
  2. To detect faults and initiate disconnection
  3. To measure current
  4. To control power factor

Questions & Step-by-Step Solutions

What is the primary function of a protective relay in a transmission line?
  • Step 1: Understand that a transmission line carries electricity from one place to another.
  • Step 2: Know that sometimes there can be problems or faults in the transmission line, like short circuits.
  • Step 3: Learn that a protective relay is a device that monitors the transmission line for these faults.
  • Step 4: When the protective relay detects a fault, it sends a signal.
  • Step 5: This signal tells the system to disconnect the faulty part of the transmission line.
  • Step 6: Disconnecting the faulty part helps to prevent damage to the transmission line and keeps the electricity flowing safely.
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