ABB OVB-SDB, Инструкция по эксплуатации

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6.0 MAINTENANCE
6.1 Caution
Before carrying out any maintenance work ensure that,
The circuit- breaker is opened and the external sequential isolators are opened and
the unit is properly earthed.
The closing spring is discharged.
6.2 General
During normal service the circuit breaker require only limited maintenance. The
frequency and the sort of inspection and maintenance basically depend on the service
conditions. Various factors must be taken into account e.g. frequency of operation;
interrupted current values and relative power factor as well as the installation ambient.
The following table gives the maintenance schedule showing the relative time intervals
between maintenance work. As far as the time interval between this operation is
concerned, it is advisable to comply with specification given in the table.
On the basis of the result obtained during the periodic inspection, it is possible to set
the optimal time limits for carrying out maintenance work.
Any circuit- breaker which will only operate a few times or which will remain closed
(ON) or open (OFF) for long periods should be operated from time to time to prevent
clogging which may cause a reduction in the closing or opening speed.
6.3 Lubrication
All the sliding parts of operating mechanism and linkages subjected to friction must be
lubricated at the specified time interval with self-lubricating grease BR plus 100.