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
8
9
10
11
A
B
C
D
1
2
3
4
5
6
7
E
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).