Table 1: Life-span of new electro-mechanical equipment in years: Values for estimated life-span are based on regular maintenance, availability of spare parts, and qualified personnel
Equipment
Typical life-span of new components
Shut down vlave
60 years
Turbine stationnary parts
50
Turbine Governor
30
Generator
40
Exciter machine
40
MV switchgear
35
LV switchgear
35
Auxiliary transformer
40
Battery systems
20
Battery chargers
25
Cables
50
Generator protection
20
Voltage regulator
20
Synchronisation
20
Unit control system
20
Plant control system
20
Emergency diesel
50
Step up transformer
50
HV switchyard
45
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