Check the active power. If the active power turns negative or extremely small, check the items below. The active power is negative when the power is regenerating.
Items to check
- Is the CT attachment orientation correct?
- Is a CT connected to the R and T phases?
- Is the R phase CT connected to 1S and 1L, and is the T phase CT connected to 3S and SL? Also check the polarity (k, l) on the CT secondary side.
- Are R, S, and T wired to P1, P2, and P3?
Check the wiring and attachment for other phase and wiring schemes as well.
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