Q : Why is there a leakage current problem?
A: When the VFD is not used, the leakage current is generally small. When using the VFD, because the power module of the inverter switches at high speed, there are high-order harmonics in the output current. Because of the inductance between the cable and the ground and between the cables, a large leakage current (up to 10 times when the VFD is not used) is generated.
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