Siemens 3AH3 - Mechanism Box Functions and Indicators

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Figure 10: Operating mechanism section diagram (drawout trip-free linkage shown) mechanism CLOSED, closing spring CHARGED
Footnotes:
* Numbered items moved from position shown in Figure 9: Operating mechanism section diagram (drawout trip-free linkage shown)
mechanism CLOSED, closing spring DISCHARGED.
1.
For type SDV6 and some fixed-mounted circuit breakers, trip-free coupling rod (62.8) is replaced with a straight coupling rod, and other
parts associated with drawout interlocking are eliminated.
Item Description
50.3 Charging flange
50.3.1 Driver
62.1 Charging shaft
62.2 Crank
62.2.2 Closing-spring mounting
62.3 Cam disc
62.5 Lever
62.5.1 Pawl roller
62.5
62.1
62.3
62.2
50.3
50.3.1
62.5.1
62.2.2