ABB SF6 LTB 245E1 BLG 1002A Product Manual page 111

Operating Mechanism Maintenance
Item
1 Operating lever
2 Roller, Close
4.1.2 Electrical interlock
1HSB515409-100 en rev2
Releasing the interlock
If the movement of the cam disc is stopped by the interlocking arm, it is not possible
to carry out a closing operation until the cam disc has been returned to its normal
position.
1. Manual discharging of the closing springs.
a. Turn the switch Local/Remote on the control panel to the "STOP" position.
b. Switch off the motor voltage with the direct-on-line starters.
c. Turn the switch on the drive unit to the "HAND" position so that the shaft
for manual cranking is released. Put the crank on the shaft.
2. Press the reverse catch button in hard using a screwdriver and crank clockwise,
see Figure 4-3a, until the locking lug on the operating lever (1) is well past the
roller (2).
3. Rectify the cause of the fault.
4. Crank anticlockwise, see
lever (1) rests against the roller (2) in the closing catch gear.
Check by measuring between the bridge and the
frame foot. Dimension according to figure.4.4
Figure 4-4. Check dimension, closing springs.
Figure 4-3b, until the locking lug on the operating
2
1
a
B20020
Figure 4-3. Releasing the interlock
Maintenance
b
B20021
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