SURGE PROTECTION DEVICE, COMPRISING AT LEAST ONE SURGE ARRESTER AND ONE SHORT-CIRCUIT SWITCHING DEVICE WHICH IS CONNECTED IN PARALLEL WITH THE SURGE ARRESTER, CAN BE THERMALLY TRIPPED AND IS SPRING-PRETENSIONED

摘要

The invention relates to a surge protection device, comprising at least one surge arrester and one short-circuit switching device which is connected in parallel with the surge arrester, can be thermally tripped and is spring-pretensioned, wherein the abovementioned means form one physical unit. The thermal tripping means is arranged in the region where heating of the surge arrester is expected when it is overloaded, and operating or surge current does not flow through said thermal tripping means. The thermal tripping means is in the form of a stop part which releases an unlocking slide of the switching device in the event of thermal overload. The switching device has two opposite contact pieces, wherein at least one of the contacts is of moveable design and is under spring pretension in the closing direction of the switching device. The opening state of the switching device is ensured by the unlocking slide and is released by the thermal tripping means for closing the switching device.

主权项

1. A surge protection device, comprising at least one surge arrester (5) and a short-circuit switching device (6), which is connected in parallel with the surge arrester, can be thermally tripped, and is spring-pretensioned, wherein the above-mentioned means form a module, the thermal tripping means (4K) is arranged in the region of the heating to be expected of the surge arrester (5) in the event of the overload thereof and is designed as a stop part through which operating current or impulse current does not flow, and which releases an unlocking slide (4; 41) of the switching device (6) in the event of thermal overload, characterized in that the switching device (6) has two opposing, in particular interlocking contact parts (6a; 6b), wherein at least one of the contact parts (6b) is embodied as movable and is under spring pretension (8) in the closing direction of the switching device, furthermore the open state of the switching device is secured by the unlocking slide (4) and can be released by the thermal tripping means (4K) to close the switching device (6).