Details Regarding Overhauling; Circuit-Breakers For 3150 A Up To 40 Ka; Lubrication Of The Roller Bearings; Lubrication Of The Right-Hand Bearing - ABB VD4 Installation And Service Instructions Manual

operations. For this purpose, please contact the ABB Service office.
Complete replacement of the actuator must be carried out every 10,000
operations.
Complete replacement of the shock absorber and of the other trans-
mission system parts (shaft, main levers, safety rings, etc.) must be
carried out after 30,000 operations.

Circuit-breakers for 3150 A up to 40 kA

To ensure correct operation of the circuit-breaker, inspection and
maintenance of the tripping devices is recommended every 2,000
operations. For this purpose, please contact the ABB Service office.
Complete replacement of the actuator must be carried out every 2,000
operations.
Complete replacement of the shock absorber and of the other part of
the transmission system (shaft, main levers, safety rings, etc.) must
be carried out after 10,000 operations.

Lubrication of the roller bearings

Lubrication of the right-hand bearing (circuit-breaker seen from the front)
Lubrication of the left-hand bearing (circuit-breaker seen from the front)
Fig. 13
A
A
A
A
Note
Dismantling and replacement of the operating mechanism (trip box)
can only be carried out by ABB personnel or by skilled and specially
trained personnel, particularly for the necessary adjustments.

Details regarding overhauling

• When foreseen, cut of the power supply to the spring charging
motor and manually discharge the operating mechanism spring by
closing and opening the circuit-breaker.
• Replace the parts subjected to mechanical stress or stress due to
particular environmental conditions, (contact and ABB service cen-
tre).
Note
These operations can only be carried out by ABB personnel or by
skilled and specially trained personnel.
A
A
A
A
47