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As a quantitative method,
if measured static capacity is 85% of the rated capacity, the capacitor
should be replaced. Equipment for measuring capacitance is commercially available.
Relays
(3)
Relays
Because imperfect contact occurs, relays should be replaced according to total makebreak opera-
tions (service life).
Refer to the table below for the criteria for replacement of parts used in the inverter. In addition,
such components have a short service life, for example, lamps, should be replaced during periodic
inspection.
Determine after inspection.
Table 1. Inverter Parts for Replacement
Parts
I
Typical replacement
cycle
Replacernant Procadure
I
Cooling
I
2-3
years
I
Replace the parts. (Determine after inspection.)
I
I
Smoothing capacitor
I
5 years
I
Replace the parts. (Determine after inspection.)
I
-
105
-
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