Operating Mechanism Maintenance
1HSB515409-100 en rev2 29
7. The interlocking arm (1) is locked by the pin (5) and stops in the horizontal
position against the locking disc (4).
a. Press the interlocking arm (1) with force upwards.
b. Insert the blocking pin (2) in the hole (3).
Figure 4-11. Interlocking, circuit-breaker closed and closing springs uncharged.
The slow opening operation means that by using the cam disc you “fetch ” the
circuit-breaker and thereafter release the reverse catch and let the operating
mechanism make a slow opening operation.
1. Place the crank in the manual operation position and crank anticlockwise until
the blocking beams move against the mechanical end stop. It feels like a light
resistance on the crank and takes normally 6-8 turns, max. 10 turns.
2. Press down the armature on the closing coil (1), Figure 4-12, so that the locking
lug (2) is disengaged from the roller (3).
3. Turn the crank approx. 300 turns anticlockwise. If the crank is turned too many
turns, a clang is heard when the cam disc (4) passes the stop roller (5) and
returns once again to the position shown in Figure 4-12, top diagram. Make a
new attempt. Follow the instructions from point 1 and crank a few turns less.
4. Press in the reverse catch button in the drive unit.
5. Release the crank and let it rotate until it stops.
6. Release the opening catch gear by tapping the armature (6) lightly with, e.g. a
screwdriver. The switch’s opening springs draw the operating lever (7) towards
the open position. The movement is stopped when the stop roller (5) rests
against the cam disc (4).
7. Keep the reverse catch button held in until the circuit-breaker has been drawn
into the open position by the opening springs. If the spring force is not
sufficient to move the locking lug (2) so it passes and engages in the locked
position against the roller (3), press in the button and turn the crank clockwise.
8. Dismantle the blocking beams.
Item
1 Interlocking arm
2 Blocking pin
3 Hole for blocking pin
4 Locking disc
5Pin
Closed
Open
1
5
2
4
3
B20007
position
position
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