As sound as... an ABB Sami.
Recently asked to build a new booster set control panel for a utilities company, EDC discovered that the original drives were two 25-year-old ABB Samis. Unsurprisingly, now unsupported in terms of spares, the customer wanted to upgrade the 2 off 2.2kW units with something more modern.
Their newly created panel now houses 2 off ABB ACQ580 drives, commissioned in closed loop control.
At this rate, it’ll be 2043 before they require another upgrade. No wonder the customer chose to invest in ABB again.