Grounding transformer placement
Grounding transformer placement
(OP)
Project consists of a 3-phase 95kW solar PV plant connected to a 12.47kV distribution line. The 480V inverter's isolation transformer is connected delta-wye with high-resistance grounding.
PV setup:
http: //i1245.ph otobucket. com/albums /gg581/jch ebahtah/in verter.png
simplified single-line:
http:// i1245.phot obucket.co m/albums/g g581/jcheb ahtah/sing leline.png
It was determined that a grounding transformer is needed to prevent possible overvoltages during a ground fault (if feeder breaker opens and PV remains in-service forming an island).
Any preference of where to install the grounding transformer (480V or 12.47kV level)?
It would certainly be cheaper to throw the xfmr on the 480V...
PV setup:
http:
simplified single-line:
http://
It was determined that a grounding transformer is needed to prevent possible overvoltages during a ground fault (if feeder breaker opens and PV remains in-service forming an island).
Any preference of where to install the grounding transformer (480V or 12.47kV level)?
It would certainly be cheaper to throw the xfmr on the 480V...
Justin Chebahtah
www.justinchebahtah.com






RE: Grounding transformer placement
RE: Grounding transformer placement
Justin Chebahtah
www.justinchebahtah.com