Chapter 1 Introduction CFP2000 Asymmetric Ground System (Corner Grounded TN Systems) Caution: In the following four situations, the RFI jumper must be removed. This is to prevent the system from Do not remove the RFI jumper while the input terminal of the Power Regenerative Unit carries power. grounding through the RFI capacitor and damaging the Power Regenerative Unit. 1-12 RFI jumper must be removed 1. Grounding at a corner in a triangle configuration L1 L2 L3 Figure 1-11 2. Grounding at a midpoint in a polygonal configuration L1 L2 L3 Figure 1-12 3.
No stable neutral grounding in a three-phase autotransformer configuration Figure 1-13 RFI jumper can be used Internal grounding through RFI capacitors, 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. L1 L2 L3 Figure 1-14