48
S&C Instruction Sheet 659-520
Power electronic assemblies
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For IGBT inverter pole assembly servicing, install the service shelf in the PCS as
illustrated in Figure 36.
Figure 36. Shelf installation for pole(s) servicing.
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Remove the three IGBT inverter assemblies using the procedure located at the top
inside of the PCS enclosure door.
For IGBT inverter assembly #1:
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Replace any damaged components.
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Check for and remove any foreign debris.
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Clean the IGBT pole, paying careful attention when cleaning the laminated bus bar.
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Check for signs of thermal or electrical stress as well as discolored components.
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Check capacitors for any signs of damage.
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Clean the large heat sinks.
For IGBT inverter assembly #2:
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Replace any damaged components.
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Check for and remove any foreign debris.
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Clean the IGBT pole, paying careful attention when cleaning the laminated bus bar.
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Check for signs of thermal or electrical stress as well as discolored components.
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Check capacitors for any signs of damage.
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Clean the large heat sinks.
For IGBT inverter assembly #3:
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Replace any damaged components.
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Check for and remove any foreign debris.
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Clean the IGBT pole, paying careful attention when cleaning the laminated bus bar.
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Check for signs of thermal or electrical stress as well as discolored components.
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Check capacitors for any signs of damage.
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Clean the large heat sinks.
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Replace the three IGBT assemblies (following the instructions located at the
top-inside of the PCS door.
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Torque the bus connections and components according to Table 12 on the next
page.
Maintenance