I have a dual alternator, one battery system.
I am using the VPX-PRO which has two internal electrically independent banks, which is great, but there are still a couple of single-point failure components upstream of the VPX... the master switch and the master (battery) contactor. I'm not too concerned about the master switch, but I am concerned about an inflight failure of the master contactor which would shut down the VPX. I have backup circuits for the alternators' field and Vsense wires. My question is, instead of creating an Essential Bus to power a few necessities, which adds complexity, why not just have two master contactors? Is this possible with one battery? Could I just wire two master contactors in parallel that "close" when the master switch is flipped on, and if one "opens" the other is there to keep the circuit energized?
If this is possible can someone guide me to a wiring schematic?
I am using the VPX-PRO which has two internal electrically independent banks, which is great, but there are still a couple of single-point failure components upstream of the VPX... the master switch and the master (battery) contactor. I'm not too concerned about the master switch, but I am concerned about an inflight failure of the master contactor which would shut down the VPX. I have backup circuits for the alternators' field and Vsense wires. My question is, instead of creating an Essential Bus to power a few necessities, which adds complexity, why not just have two master contactors? Is this possible with one battery? Could I just wire two master contactors in parallel that "close" when the master switch is flipped on, and if one "opens" the other is there to keep the circuit energized?
If this is possible can someone guide me to a wiring schematic?