Operating the Drive
Page 7-24 890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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Advantages
Using the 890 as a 4-Q power supply in common DC Bus schemes provides the following advantages:
• Simplified approach to Common DC Link systems
• Allows standard 890 drive to act as 4-Q DC Link power supply unit
• Near-sinusoidal supply currents (Motoring and Regenerating)
• Near-unity power factor operation (0.99 or better)
• Low supply harmonics currents (helps to meet G5/4 and IEEE519)
WARNING!
890 drives operating in 4-Q REGEN control mode are NOT suitable for use on systems where the
mains supply (L1, L2, L3) is provided by a generator
(where the supply cannot absorb the regenerated current).
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