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...
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...
