Power factor and three-phaseQuestion 343 of 1506

A fuse protecting a three-phase power factor correction capacitor blows. What should you do first about the capacitor?

Replace the fuse with a larger rated fuse
Bypass the fuse with a short jumper wire
Measure its capacitance and check the marking
Assume the capacitor is good and move on

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Correct answer: Measure its capacitance and check the marking

The suspect capacitor's farad value must be verified against the marking.

Source: Troubleshooting Motors and Controls (Dickson-Self), 6.1: Testing Motor Components

Questions last reviewed: 18 October 2026

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