Low harmonic ABB drives have allowed a waste water pumping station to increase its pumping capacity without causing disturbances on the electrical supply network:
Low harmonic active rectifier installed:
Because of the existing drives, the treatment works already had a high harmonic loading on site. The installation of additional drives for the new storm flow pumps threatened to increase this load to unacceptable levels. To solve this potential problem, ABB recommended the installation of an ABB low harmonic active rectifier.
Following installation of the drive and pumps, ABB tested the harmonic distortion, both at the incomer live connection and the cable between the fuses and contactor. Distortion readings were found to be much lower than a normal six pulse rectifier - around two to three percent compared with the usual level of 40 percent.
Kevin Atkin, Tendering Manager with contract panel builders Blackburn Starling, says: "We asked ABB to help and they calculated what equipment would give us the best possible solution to the problem and meet the regulations. The drive they recommended provided the most cost-effective solution to the problem of keeping the harmonics at the lowest possible level."
Contact: Steve Ruddell
ABB Ltd.,
9 The Towers, Wilmslow Road,
Didsbury, Manchester M20 2AB
Tel: 0161 438 3036
Fax: 0161 445 6066
Email: [email protected]
Web: www.abb.com/motors&drives