It was obvious that replacing the 55 kW VSDs would be costly. However, looking at the site, I found that the VSDs had been operating in a clean environment and had also been well maintained. Although ten years old, the VSDs needed minimum attention: just a straightforward cleaning of the filters and drive cabinet and a new fan.
This was good news for the company - refurbishing the VSDs cost only around 10-15 percent of the purchase price of a new drive.
Replacing, upgrading or retrofitting installed VSDs or electrical motors is often prompted by the need for pumping stations to increase their capacity, to serve a growing local population.
As with our customer above, this provides a good opportunity to look at how the existing VSDs can be refurbished and reused in the new system, at a fraction of the cost of buying a new unit.
You could keep the existing cabinet and framework and simply upgrade or retrofit specific parts – the result is lower capital costs and savings on installation and commissioning time too.
To discover more ways to improve the life of existing assets, visit ABB’s dedicated reliability webpage.
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