Operating the Drive
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
In this system, the 4-Q Regen drive supplies the motoring and regenerating requirement of the load.
Additional external equipment required by the 4-Q Regen drive includes :
• EMC Filter
• AC Line Fuses
• DC Link Fuses
No extra hardware is required to detect the rotation, frequency and phase of the mains supply. Also, no
dynamic braking resistor is required.
The 4-Q Regen drive draws sinusoidal, unity power factor current from the supply and only has to be rated
for either the power consumed or supplied by the system, or by the system braking requirements, whichever
is the larger.
Dynamic Braking (eg. for Emergency Stopping purposes) can still be used in this control mode if required.