ABB ADVAC - Description of el Operation

1VAL050503-MB Rev B Replaces (1VAL057485-MB Rev. C) Oct 2013
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Description of EL Operation
3
2
1
The EL mechanism can be charged manually
using the spring charging lever or electrically by
the spring charging gear motor. While activat-
ing one of the above mentioned methods, the
cams (2) on the rotating operating shaft (1)
move the closing lever assembly (3) to charge
the closing spring.
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6
5
4
4
A part of the closing spring’s force works on the
closing hook through the closing lever assembly
and the pin of the cam/toggle assembly (4). The
closing hook remains locked by the closing shaft
(5) and the opening hook reaches its position
where it receives the central hook of the cam/
toggle assembly (6). The breaker signals that it
is charged.
MECHANISM AND OPERATION