OVERVOLTAGE PROTECTION FOR INVERTERS THAT COMPRISE AN EMC FIILTER AT THEIR INPUT END

摘要

In an overvoltage protection apparatus before an inverter (5) for feeding electric energy from a DC voltage source (15) particularly into an AC power grid (4), the overvoltage protection apparatus comprising a DC voltage input stage (6), the DC voltage input stage (6) comprising at least two current-carrying lines (22 to 24) and an EMC filter (7) including interference suppressing capacitors (13,14) and interference suppressing inductors (12), surge arresters for diverting overvoltages against earth are connected to the lines (22 to 24) after the EMC filter (7), from the point of view of the DC voltage source (15). (Fig. 1)