WEG CFW-11W, Addendum

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General Information
CFW11W | 1-1
1. GENERAL INFORMATION
ATTENTION
!
Strictly follow the safety instructions contained in this Addendum and in the CFW-11M user
manual .
1.1. ABOUT THE MANUAL
This manual provides information about the CFW-11W Modular Drive frequency inverter series. Refer to the
CFW-11M user manual and the CFW-11 programming manual
.
1.2. ABOUT THE CFW-11W
The inverters of CFW-11W series present a modular design, with configurations from one to five Power Units
(UP11), one Unit Control (UC11) and wiring cables. The modular assembly increases the reliability of the inverter
and simplifies its maintenance. A single control unit (UC11) can control up to 5 UP11s.
These inverters are water cooled, being more compact than other inverters. Moreover, the DC link features
plastic film capacitors, which reduce losses and increase maintenance intervals.
The UP11s are directly powered by the DC link and the UC11 is powered by an ex24 Vdc power supply.
Figure 1.1 shows the standard configuration with an input six pulses rectifier.
The power units are controlled by the UC11. The UC11 contains the control rack of CFW-11 series and the IPS
board. This board sends signals to all UP11s (PWM, control signals, etc.) and receives signals from them
(voltage feedback, current, etc.).
Figure 1.1: Example of configuration with 5 UP11s and 6-pulse rectifiers