It Networks - WEG CFW-11 User Manual

Installation and Connection

3.2.3.1.1 IT Networks

ATTENTION!
In order to be able to use the frame size E CFW-11 inverter in IT networks (neutral conductor not
grounded or grounded via a high ohmic value resistor) or in corner-grounded delta systems, it is
necessary to remove the RFI filter capacitor and the MOV connected to the ground by changing the
position of the J1 jumper on the PRT1 board from (XE1) to "NC", according to the figure 3.13.
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PRT1 board
(a) Location of the PRT1 board (inverter without the bottom front cover)
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(b) Procedure for disconnecting the RFI filter and the MOV connected to the
ground – necessary for using the inverter in IT or corner-grounded delta networks
Figure 3.13 (a) and (b) - Location of the PRT1 board and procedure for disconnecting the RFI filter and the MOV connected
to the ground – necessary for using the inverter in IT or corner-grounded delta networks
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