Excess voltage protection for inverter with input EMC filter

摘要

The apparatus has a direct current voltage input stage (6) including two current-carrying lines (22, 24) and an electromagnetic compatibility filter (7) comprising suppression capacitors (13, 14) and suppression inductors (12), where the current-carrying lines are provided for dissipating overvolatges with respect to earth. Overvoltage arresters (16, 17) of a direct current source (15) are arranged in a housing of an alternating current converter (5) behind the compatibility filter on the current-carrying lines.