Nice product and seller. Some documentation correction required. U11 is unbalance protection value (default 15v). U12 is unbalance protection switch (default is OFF)
U10 seems to be three phase voltage unbalance value (Volts), U11 - phase unbalance value (Degrees) and U12 - phase unbalance switch (on/off). Waiting for clarification from seller.
High quality.. Thank you