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Think before you buy energy-saving equipment

Before installing energy-saving drives and high-efficiency motors, you need to examine carefully the system in which they will be used. Frank Griffith, a drives consultant with ABB in the UK, offers advice on what to look for.

Harmonic filters – where size matters

Frank Griffith, a consultant engineer with ABB in the UK, looks at some of the factors that affect the sizing of harmonic filters for drives. Griffith has extensive experience of designing drive systems with several pioneering designs to his name. He is an MIET and and a lecturer on drives topics