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  1. Carlos_

    UL489 Vs Ul489B

    Hi People, I am designing a solar plant and the PV modules will be behind DC optimizers. I am trying to choose a CB however, I am not sure if I can use UL489 instead of UL489B rated CB. I believe that UL489 will be suitable as the surrent from the PV array will be regulated by the optimizer...

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