NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

Station-class surge arresters at a distribution substation are installed to:

increase the continuous current rating of the power transformer limit lightning and switching overvoltages that would otherwise stress transformer and bus insulation replace the station ground grid correct lagging power factor on the outgoing feeders

Correct Answer:

limit lightning and switching overvoltages that would otherwise stress transformer and bus insulation

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