Question on AFCI breakers using Reliance Transfer Switch 510C
Hi,
I'm looking to install a transfer switch so I can run some specific circuits using an Ecoflow Delta Pro 3 with a 30A inlet. Battery is charged from solar panels, this is not a grid-tied system. I already have an interlock with a 50A breaker to use with a gas generator with an inlet outside. The idea is that this transfer switch would be pretty much "permanently" getting its power from the DP3 so they're using energy generated from solar panels. I have an EATON panel that takes CH breakers.
I got a Reliance 510C transfer switch and an electrician is coming to install it on Saturday, he says that having both main grid power and the circuits on the transfer switch with the DP3 at the same time should not be an issue since both sources would be effectively isolated. When I asked him about AFCI/GFCI protected breakers he stated that my circuits will still be protected with the AFCI breakers from the main panel so it's not necessary to get AFCI breakers for the transfer switch. The 510C installation manual has a section for wiring of extra neutrals and replacing breakers on the transfer switch with AFCI breakers.
If the circuits would indeed still be protected, how would that work? I see the wiring diagrams but to me, the transfer switch would bypass the breakers on main panel. I just cannot grasp how the protection from the breakers in the main panel would be possible without those breakers being powered from main at the same time.
Your insights are appreciated, thank you!