Chapter 2. Wiring | VFD-VJ 
 
2-11
 
Keep the RFI switch 
Internal grounding through RFI capacitor, 
which reduces electromagnetic radiation. 
In a situation with higher requirements for 
electromagnetic compatibility, and using 
a symmetrical grounding power system, 
an EMC filter can be installed. As a 
reference, the diagram on the right is a 
symmetrical grounding power system.
 
Y connection (Star Connection) with stable neutral 
grounding point.