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Siemens 3AH37 - Page 33

Siemens 3AH37
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Description
9229 9992 176 0D 33
2013-07-08
Priority opening
To lock the OPEN position, the drive mechanisms of the vacuum circuit-breaker can
be equipped with "priority opening" . This is also the case for vacuum circuit-
breakers on switch gear trucks, in withdrawable sections or with disconnectors.
As long as the OPEN pushbutton is actuated, closing with the CLOSE pushbutton is
mechanically locked.

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