In the event of a defined grid fault, the grid and system protection (NA protection) disconnects the energy generation systems (photovoltaic, generator, battery buffer) from the grid. Its function is

Clip-on current transformers for primary rated currents from 30 A to 7,500 A, secondary rated current 5 A or 1 A, in accuracy classes 0.2s, 0.2, 0.5s, 0.5 and 1.