We have a large Siemens / Robicon Perfect Harmony Power Cell in stock for a 3000 HP medium Voltage VFD. Part Number 460D60.05. 
The Robicon Power Cells constitute the power section in the Perfect Harmony Medium Voltage VFD. They are not too difficult to replace, although, people unfamiliar with working on and around high voltage power electronics should not attempt.
EMA commonly repairs the Robicon Perfect Harmony medium voltage VFD, including both replacing and rebuilding the Power Cells. We have a number of cells in stock, including this one, Robicon PN 460D60.05 . 
If you require service or repair of a Siemens / Robicon Perfect Harmony Medium Voltage VFD hit any of the contact methods on the right, or call 770-448-4644.
No one, anywhere, is better at drives than we are.. (and that includes the Siemens / Robicon Perfect Harmony medium voltage VFD)