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(2) Mechanical service life
The normally energized type has the mechanical service life of 0.25 million operations ,
and the latch type 0.25 million operations. (The mechanical service life of the vacuum
interrupter is 100,000 operations.)
For the components listed below , replacement or detailed inspection and cleaning are
recommended after the indicated number of operations.
Table 9
Parts name
Vacuum interrupter
Auxiliary switch
Movable conductor
Latch mechanism
Closing/trip coil
Movable core
Stationary core
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Recommended replacement parts
No. of operation for replacement
100,000 operations or 15 years
100,000 operations or 10 years
100,000 operations or 15 years
250,000 operations or 10 years
250,000 operations
Detailed inspection and cleaning
every 100,000 operations.
Detailed inspection and cleaning
every 100,000 operations.
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6F9G0154
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