Rayliegh METSEEMD461R LVCT setup issue - positive power a and c phase

[swil]

Hi,

When working with a Schneider issued Rayleigh METSEEMD461R LVCT meter using the quick click 3-in-1 LVCTs (e.g. METSECTV25006), in some cases it was not possible to get positive power on each phase (specifically a and c phase).

The LVCT label faces outwards and the solid core CT arrow points towards the load. As per the installation guide, These were configured LHS (other option is RHS). In some cases there was negative power on a and c phase, and changing the configuration to 'RHS' corrected this. On other occassions where there was negative power on a and c phase, changing the configuration to RHS did not correct this.

Any ideas as to what happened? The voltage wiring was as per the installation guide.

[MohamedSait_J]

Hi Swill, 

Do you see negative power only in a and c phase and not in b phase?

[swil]

Yes

[MohamedSait_J]

Can you please say me what is the PF in all three phases? I doubt on the sequence of current connected.

[swil · Accepted solution]

This diagram helped to get an understanding of LHS and RHS config. It's for Selec PWCTs, which may be the same as METSECTV LVCTs used in the D461Rs.

Wording of the diagram is the same as wording for LVCT orientation in D461R installation guide.