Description
30 9229 0025 176 0A
2019-08-05
Key-operated interlock 3AX1437-.. (optional)
Electrical closing lock-out (-Y8E) 3AX1415-.. (optional)
If the vacuum circuit-breaker is equipped with a key-op-
erated interlock, it is possible to mechanically prevent
both manual closing and electrical closing (position
switch -S12).
To lock the vacuum circuit-breaker, press and hold the
OPEN pushbutton until the key is turned to the CLOSED
position (vertical).
The key can be pulled out in the locked position.
Note: In the as-delivered condition, the vacuum circuit-
breaker is locked with the key-operated interlock and
must be unlocked for test switching operations and com-
missioning.
Fig. 40 Key-operated interlock (59.3)
Closing of the vacuum circuit-breaker can be prevented
with the electrical closing lock-out (-Y8E).
The electrical closing lock-out (-Y8E) enables operation
of the vacuum circuit-breaker if auxiliary voltage is avail-
able and mechanically locks both manual closing and
electrical closing if auxiliary voltage is not available (po-
sition switch -S5).
Note: For mechanical or electrical circuits the electrical
closing lock-out 3AX1415-.. must be connected to the
control voltage, otherwise no closing is possible.
Fig. 41 Electrical closing lock-out (59.5)
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