Overvoltage protection apparatus

摘要

In the case of an overvoltage protection apparatus (1) consisting of a lower part (4) and an upper part (5) which is plugged onto the lower part (4), in the case of which input terminals (6, 7), output terminals (8, 9) and earthing terminals (10-12), line trains (13, 14) which run between mutually associated input and output terminals (6, 8; 7, 9), and contact elements (15-21) for electrical connection to the upper part (5), mating contact elements (22-28) in the upper part (5) for electrical connection to the lower part (4), and at least one overvoltage fine protection element (29; 30) which is connected between two mating contact elements (22-28), and, distributed between the lower part (4) and the upper part (5), at least one overvoltage coarse protection element (31; 32) and at least one response impedance (33-36), which is allocated to the overvoltage fine protection element (29; 30), are provided, extremely stringent safety requirements are satisfied in that the response impedances (33-36) are inserted into the corresponding, otherwise continuous, line trains (13; 14), one end of each of the response impedances (33-36) is electrically connected to contact elements (17-20) in the lower part (4), and the response impedances (33-36) can be electrically connected to the overvoltage fine protection elements (29, 30) by plugging the upper part (5) onto the lower part (4). <IMAGE>