Abstract: A low voltage valve type arrester device for connection between a domestic electric supply line and earth includes a varistor, a switching device and an encapsulated gas discharge voltage arrester connected in series. The switching device includes two switch members connected together by a solder connection and biased apart by a spring. A fusible link is connected to the two switch members in parallel with the solder connection. When a voltage surge occurs, current flows through the arrester to earth. If the surge is large enough to render the gas discharge arrester continuously conductive, the solder connection melts due to the heat dissipated in the varistor and the two switch members move rapidly apart. The fusible connection rapidly melts by which time the switch members are sufficiently far apart for no arc to form between them.

Abstract: An apparatus for actuating electrical load-separating switches in an electricity supply network, and including at least one manual actuation lever. An electrical actuating motor is provided which is capable of being supplied with operating current from an auto battery, and is located at the load-separating switch in addition to the manual actuation levers. A remote control cable, which extends from the electrical actuating motor, is equipped with a plug connector having a plug which can be taken along in the maintenance-service vehicle belonging with the auto battery. The load-separating switches are selectively capable of being actuated over the remote operating cable from a switching and indicating panel carried along in a maintenance-service vehicle. A follower for the manual actuation lever of the load-separating switch is connectible to a closed-loop drive chain, and when coupled thereto is movable between abutments.