A friend approached me with a following question:
he has a solar array with an inverter, powering house and sending surplus back to the grid.
In an event of grid power shortage, the main RCD gets instantly tripped and has to be reset manually.
Is there a way to detect power shortage and isolate inner grid proceeding the main RCD actuation, and automatically reconnect after detecting power get restored?
Nothing can be connected before the RCD.
I assume, that RCD tripping is here a feature, aiming to protect people working on the grid from presence of stray power.
Probably there already exist a solution, never the less I was considering using current sensing clamps like Dave showed in the video about solar analytics.
Somehow sense the difference between the two and trip a relay(probably solid state) connected right after the RCD
Give me your thoughts.