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Hi All,
My question relates to the Quattro with 2 AC inputs, during the transfer from one AC source to another (Grid to Generator) what is the interlock operation performed (mechanical or electrical or both) that prevents AC in 1 and AC in 2 from both being connected at the same time, even if it is very momentary? More specifically, during the change-over, is it a Break Before Make operation that prevents back-feeding of the generator to the grid if the grid has failed?
The Quattro will switch into inverter-mode for 20-30s before switching to the other AC input.
For example, with a Quattro 48/10000 and a 10kVa generator, a 16kW load will draw 8kW from the AC source (generator) and 8kW from the battery bank (inverter). While switching to input from the grid (other AC input) or vice versa, does this mean the Quattro draws 16kW from the batteries for 20s-30s?
Thanks for your prompt answer Matthias. Do you know where I can find some documentation on this? I may need to provide some supporting evidence to my electricity supplier proving that the AC inputs are in someway interlocked.
It have to disconnect the first AC input before it can start to synchronize to the other AC input and after that it can switch to the 2nd AC input.
If the transfer switch of the first AC input is stuck (for whatever reason) the Quattro is unable to synchronize to the 2nd input, so it can't switch on the transfer switch of the 2nd input.
I had been through the manuals prior to this community, I can find schematics of the contactors, but unfortunately no description on their operation. Perhaps I have missed it. I would describe it as having a software interlock given the syncronising and timing that is performed prior to the change-over, I need some information to provide the electricity distributor. I was hoping that it might also have electrical interlocking.
