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I agree with those (5) drive techs. I mentioned 18-pulse for awareness of the technology, as there is an install base of them out there, but I never recommend them for new installations. With an 18-pulse, it essentially rectifies (9) phases to make the DC bus, instead of the typical (3) phases. Even though many expect the voltage drop across the phase shifting transformer, and additional/balancing reactor, to result in a lower DC bus... with 18-pulse we end up seeing a bit higher DC bus with the rectification of (9) phases instead of (3). Had they let you power it down to troubleshoot, and assuming the jobsite's 480V power wasn't low, the first thing I'd be looking at is those (9) phases after the transformer. Other than the obvious voltage magnitude test points between input and DC bus, I'd also be casting a critical eye on the performance of those (9) phases. Each was likely fused, check the (9) fuses to see if any were open. After the fuses, I'd check the 18 diodes, were any of those bad/open. When in doubt, current is the great equalizer of troubleshooting - check for balanced current across the (9) phases. (Some of those tests are easier to do than others - from a safety aspect, I'd have started with the fuses and diode check as those are power down tests). Complexity of troubleshooting - another reason I personally don't like 18-pulse:)

We’re happy to hear you found the video helpful. Regarding your experience with our technical support, thank you for your feedback and for sharing your experience. At ABB we strive to provide excellent support to all our customers, and we're sorry that we fell short of your expectations in this instance. Your feedback is valuable to us, and we use feedback like yours to improve our support services. As an example that is directly tied to your scenario, our Technical Support is based out of our Wisconsin factory, while the 18-pulse are manufactured at a different US-based facility. We previously identified that our Wisconsin team didn’t have timely access to 18-pulse as-built drawings, thus our responses were not as timely as we expect. As a result, we’ve since made improvements to processes that allow that data available to be more readily available. If you have any further questions or need assistance, please don't hesitate to reach out to us.

Unfortunately that is not possible. The hardware components, mainly power devices of the 9 KW drive are not the same as the 37 KW drive. A larger drive would need to be purchased.

ABB Drives service workshop located in New Berlin, WI

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Is drive composer compatible with all AC and DC drives or just with some specific ones?

ABB offers a free version of the drives software Drive Composer. It can be found on abb.com/drives under software.