Delta VFD150C43A-21 User Manual

Chapter 1 IntroductionC2000 Plus
1-8
Asymmetric Ground System (Corner Grounded TN Systems)
Caution: Do not remove the RFI jumper while power to the input terminal of the drive is ON.
In the following four situations, the RFI jumper must be removed. This is to prevent the system from
grounding through the RFI and filter capacitor and damaging the drive.
You must remove the RFI jumper for an asymmetric ground system
1. Grounding at a corner in a triangle configuration
L2
L3
L1
Figure 1-10
2. Grounding at a midpoint in a polygonal
configuration
L2
L3
L1
Figure 1-11
3. Grounding at one end in a single-phase
configuration
L1
N
Figure 1-12
4. No stable neutral grounding in a three-phase
autotransformer configuration
L
1
L2
L3
L1
L2
L3
Figure 1-13
You can use the RFI jumper for a symmetrical grounding power system
In a situation with a symmetrical grounding power system,
you can use the RFI jumper to maintain the effect of the
built-in EMC filter and surge absorber. For example, the
diagram on the right is a symmetrical grounding power
system.
L2
L3
L1
Figure 1-14

Delta VFD150C43A-21 Specifications

General

Brand	Delta
Model	VFD150C43A-21
Category	DC Drives
Language	English