Grounding connections for balancing generator with the 32A Auto transformer

Q&A and troubleshooting
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1

What are the connections for the ground wires in the auto transformer when used for generator balancing?

2

Please can you add more detail about what you are trying to do, e.g. is your generator a 240V generator and you are trying to produce 120-0-120?

What is the generator model?

3

Hi Mike,

It is two Ecoflow delta pros through a double voltage hub, so yes, it is two 120v legs (240) to the panel. I am going to use it to balance the load on them

Thanks,

Phil

4

Had to look that one up, as it’s not common outside of US.

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so Gen1 & 2 connect to your hub, which also presumably controls the phase and frequency of the generators to achieve the 240V from 2 x 120V. you then take the 240V to the auto transformer from L1 & L2 connections, which recreates the 120-0-120V.

You will either have to connect the ground to the mid point, or energise the grounding relay - which I think has a 12V dc coil. The ground should also be connected to the ground studs on both generators if they have them, or to a ground terminal on the hub.

5

Thanks for your response Mike, I will let you know how I make out.