Southern Water's new wastewater treatment works to use ABB drives
Over 90 ABB industrial drives are to be installed at a new wastewater treatment works and sludge treatment centre at Peacehaven near Brighton and Hove. The works, being constructed for Southern Water, will treat the 95 million litres of wastewater produced each day from Peacehaven, Woodingdean, Ovingdean, Rottingdean, Saltdean and Telscombe Cliffs, as well as Brighton and Hove.
The low harmonic and 6-pulse drives range from below 1 kW up to 560 kW. The drives are being supplied through ABB Drives Alliance member, Sentridge Control and will be incorporated into seven motor control centres (MCCs) supplied by MCS Control Systems. Five of the MCCs are for the main works and two for the pumping stations at Marine Drive, Brighton and Portobello, Telscombe Cliffs.
Steve Poole, Managing Director of MCS says: “The main criterion for the drives was to minimise the harmonics produced by the large motors employed in the pumping stations. ABB helped us specify which drives to use. A mixture of low harmonic and 6-pulse drives was found to provide the best combination, providing the right level of harmonics mitigation while keeping costs to a reasonable level.”
Another aim is to minimise the size of the MCCs because of the lack of space within the works. Says Poole: “The ABB drives offer the smallest size possible at these power ratings. The large drives are also rack mounted and are fitted with wheels to make them easier to install in the MCC cabinets.”
The ABB drives also have built in Profibus capabilities, making it easy for the facility’s control system to communicate with the drives.
“The ABB drives provide the best combination of capabilities and price for this application,” says Poole, “providing a simple, cost-effective and low risk solution.”
The MCCs are due to be installed on site in summer 2011, with the treatment works scheduled to be fully operational in 2013.