Arrangement for overload protection for overvoltage protection equipment
An overload protection and protection device technology, applied in emergency protection circuit devices, overvoltage protection resistors, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. The whole range of leakage current to average short-circuit current, cost-intensive design, etc.
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[0031] In the drawing, the description begins first with structural unit 1 . The structural unit 1 is characterized by a common housing which has a type II surge arrester 2 inside it.
[0032] Type II surge arrester 2 in accordance with figure 1 In the case of an embodiment of the present invention, there is a thermal separation device 3 known per se which responds in the event of an overload.
[0033] The structural unit 1 also has external connections 4 and 5 .
[0034] Internally, the switching unit 6 is connected in series with the type II surge arrester 2 .
[0035] The switching unit has two non-movable fixed contacts 7; 8.
[0036] The contacts 7 ; 8 are positioned at a narrow distance and can be part of the connections of the surge arrester 2 .
[0037] The spacing is selected such that during each surge current or discharge process the switching device 6 is brought into the quasi-closed state due to the arc formed.
[0038] In contrast, in the standstill state, t...
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