In an Automatic Power Factor Correction (APFC) panel, the primary function of a relay card (switching card) is to:

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Physics · Electrical Installations

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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switch capacitor banks by providing isolation between the APFC controller and contactors

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Answer 1

switch capacitor banks by providing isolation between the APFC controller and contactors

Answer 2

protect the system from overvoltage by absorbing surges

Answer 3

directly measure the power factor of the APFC system

Answer 4

store energy to maintain voltage stability in the APFC system

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