Thank for the information all
It seems that removing the neutral conductor on the XO (208V) side fixes the problem.
I have been reviewing and I can't see any reason that this would not be a suitable long term solution.
Any thoughts?
These readings were with the transformer energized from the low side - the 208V utility side. The solar is on the 480V side, but the breaker feeding that was open.
This was discovered while preparing to connect the PV array the grid.
We have a customer who has 480V solar array that is backfeeding a 120/208V building service via a 750KVA Dry-Type Grnd-Wye to Grnd-Wye step down transformer. This transformer has been provided with a grounded Delta tertiary winding
We have 4 wires (A,B,C,N,G) to the High side and Low side of...
I'm troubleshooting a PV installation where we have 10 3Ø inverters tied into a single switchboard then running a few hundred feet to the point of interconnection at a dedicated pad mount transformer.
When the PV panel main breaker is off, all voltages are nominal L-G 277V range. When the...
Forgot to insert picture. As Homer would say, "Its my first day!"http://files.engineering.com/getfile.aspx?folder=aedd0de6-4f65-466a-ae01-87c59399e6e0&file=TCC_Curve.jpg
I am in the middle of a discussion with an equipment supplier who is saying my fusing for transformer protection is undersized per his tables. I have modeled the curve in ETAP using the FLA of the transformer and plotting it against the magnetizing inrush and the damage curve.
Is the 1.4 FLA...
