Pluggable lightning current and surge arrester combination (type 1+2/Class I+II arrester) consisting of protective plugs and base element for DIN rail mounting. Protection circuit for 1-phase power supply networks with separate N and PE (3-wire system: L1, N, PE).

Features: Encapsulated spark gaps with ignition mechanism for triggering the response voltage. Directly parallel connected varistors. Additional pluggable sum current spark gap between N and PE. Function monitoring for Class I and Class II arresters. Disconnection of the individual L-N protection paths in the event of a fault. Operating current-free (mechanical) optical fault indication and remote fault indication in the L-N paths for Class I and Class II arresters via a common potential-free changeover contact.

Basic element can be mounted with variable connections (outer conductor from above or below). Protective plugs can be inserted into the base element rotated by 180° (plug labeling legible). Mechanical coding of base element and plug prevents incorrect insertion of connectors. Labeling option for protective plugs and terminals. Biconnect terminals for connecting round conductors and wiring bridges.