Physics · Electrical Protection Systems
What does the Plug Setting Multiplier (PSM) represent in the operation of a protective relay?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It is a constant factor that is independent of the fault current and only adjusts the relay's settings.
- 2It is used to adjust the time delay of the relay based on fault severity.
- 3It is the ratio of the actual fault current to the plug setting, which determines the relay's response time.✓
- 4It is a factor that determines the maximum fault current that can be handled by the relay.
Correct answer
It is the ratio of the actual fault current to the plug setting, which determines the relay's response time.
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