I would like to use my Voltech PM3000A Universal Power Analyser to measure the power draw from a three-phase load. The load I wish to measure is actually the power consumption from our premesis, so the Voltech will basically be performing the same function as a standard electricity meter.
There are some existing 800A/5A CT's installed, which previously fed a now defunct electricity meter. I wish to re-use these CTs. The problem is that the CTs are commoned to earth at one end. I wish to know if this configuration is compatible with my PM3000A in 3Ph, 4-Wire mode. I have attached an excerpt from the wiring diagram showing this arrangement.
The CT's are rather difficult to access, which makes re-wiring them prohibitive.