I would like to solve this issue that happened to one of my energy meter. This meter using Double CT setup with CT800A/5 as primary CT clipped into copper busbar (main aircond line for the building).
Phase A: No Current, but voltage ok around 240V
Phase B: No Current, but voltage ok around 240V
Phase C: Voltage very low around 1.1V but current ok around 200+ A.
Do you have any thought on this?
I think maybe you have inserted the wrong wire in the Uc.
Please do this test.
1 remove the wire in Uc.
2 connect the wire in Ua to the Uc (short the Ua and Uc by a wire)
3 check whether the voltage reading of Uc is nearly the same as Ua now.
if it is still not the same, please give us a photo and let me see it clearly that you have shorted the Ua and Uc successfully.