01 Product Overview | REG2000
1-7
Asymmetric Ground System (Corner Grounded TN Systems)
Caution: Do not remove the RFI jumper while the input terminal of the Power Regenerative Unit carries
power.
In the following four situations, you must remove the RFI jumper, because the phase to ground voltage is
not symmetrical in the power system. This prevents the Power Regenerative Unit from grounding through
the RFI jumper and damaging the Power Regenerative Unit.
Corner Grounded TN Systems: remove the RFI jumper
1 Grounding at a corner in a triangle configuration
L2
L3
L1
2 Grounding at a midpoint in a polygonal
configuration
L2
L3
L1
3 Grounding at one end in a single-phase
configuration
L1
N
4 No stable neutral grounding in a three-phase
autotransformer configuration
L1
L2
L3
L1
L2
L3
Symmetrical Power System: Can use the RFI jumper
Connect a symmetrical grounding power system to a RFI
jumper to maintain the efficiency of the transient voltage
surge suppressor. For reference, the diagram on the right is a
symmetrical grounding power system.
L2
L3
L1
