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exceeds 4kHz, make an appropriate reduction of the distance, and better lay the wire in metal tube.
When adding peripherals (filters, reactors, etc.) to the VFD, check the ground resistance with 1000V tramegger and
ensure the value is above 4 MΩ.
Do not add phase advance capacitor or RC snubber to the U, V, W terminal of VFD.
If the VFD starts frequently, do not cut off the power, use the COM/RUN of control terminal to conduct start and stop so
as not to damage the rectifier bridge.
The earth terminal must be grounded reliably (grounding impedance should be under 100 Ω) to avoid accidents, or there
might be electric leakage.
Choose the wire diameter according to national electrical code while conducting major loop wiring.
2.12 Spare Circuit
It may cause big downtime loss or other accidental failure during VFD failure or tripping. Adding spare circuit is
recommended under this circumstance to ensure safety. Note: confirm and test the operation characteristic of the spare
circuit in advance to ensure the working frequency and the phase sequence of converted frequency are agreed.
