Article 4.1.1.2 : Total KVA is less than the individual RYB per phase KVA summation in EN8400/EN8410.
Please find the below image of EN meter FYR.
In EN8400 has interchanged CT S1 and S2 in the B phase and minus value comes in the KW B phase. Also, neutral current An = 5.9 A comes and as shown in image total KVA does not match the addition of individual RYB phase KVA.
After a correction in B Phase CT S1 and S2 (interchanged), KW reading minus changed to positive An =0.0 comes and Total KVA matches the addition of RYB Phase also the Amp phase angle has set in order.
Note: If this type of issue comes check the Amp phase angle and Voltage phase angle are in order and CT S1 and S2 are connected accordingly.