Description
9229 0025 176 0E 33
2021-11-15
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 -S5).
To prevent the vacuum circuit-breaker from being man-
ually or electrically closed, press and hold the OPEN
pushbutton, until the key is turned to the CLOSED posi-
tion (vertical).
The key can be pulled out in the locked position.
In the as-delivered condition, the vacuum circuit-breaker
is locked with the key-operated interlock and must be un-
locked for test switching operations and commissioning.
Fig. 38 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).
For mechanical or electrical circuits, the electrical clos-
ing lock-out 3AX1415-.. must be connected to the control
voltage, otherwise no closing is possible.
Fig. 39 Electrical closing lock-out (59.5)
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