Physics · Electrical Machines - Transformers
What is the primary purpose of using a harmonic restraint function in differential protection relays of power transformers?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1To prevent false tripping of the relay due to magnetizing inrush current✓
- 2To damp out harmonic oscillations in the system current
- 3To filter out the harmonic content in the output voltage
- 4To reduce the harmonic power loss in the transformer core
Correct answer
To prevent false tripping of the relay due to magnetizing inrush current
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