Combined arrester with function indicator, for tool-free installation on the 40 mm busbar system with overcurrent-protected voltage tap (L and N) using automatic circuit breaker S201P-B6 for RfZ and APZ in accordance with the application rule VDE-AR-N 4100. Application: Buildings without external lightning protection and to meet the requirements for overvoltage protection of the electrical system in accordance with DIN0100-443.