130BA491
Illustration 1.1: This certificate also covers FC 102 and FC 202!
1.1.11. IT Line
IT Line
Do not connect 400 V adjustable frequency drives with RFI filters to line supplies
with a voltage between phase and ground of more than 440 V.
For IT lines and delta ground (grounded leg), line voltage may exceed 440 V be-
tween phase and ground.
Par. 14-50
RFI 1
can be used to disconnect the internal RFI capacitors from the RFI filter to ground.
If this is done, it will reduce the RFI performance to A2 level.
1. Safety VLT
®
HVAC Drive Instruction Manual
8
MG.11.A4.22 - VLT
®
is a registered Danfoss trademark
1
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