Dear All,
Dear bacon4life,
Understand this may be the utility's concern and such requirement may not likely be relaxed.
Would you please suggest any method that I can overcome this <40kA criteria? as my client still wants to do LV grid connection but not HV.
The 3.5kA remaining fault current...
The utility transformer is 11kV/380V.
The utility company asks for 11kV grid connection.
It is electrically possible but impacts to my project is very big.
My explanation to the utility company failed.
The utility company said that his transformer supplier declared that the transformer LV terminal is not able withstand a fault current of >40kA and without any duration data. i.e. >40kA for 0 second is also not allowed.
He said that if the fault...
Thanks all,
Well noted. Now I also believe the fault current from the renewable generator will not flow to the utility transformer LV terminal in all cases. Only an outgoing feeder may have the chance to experience the sum of fault currents from both the renewable generator and the utility...
I have to connect a LV renewable generator to the utility's LV grid.
The LV renewable generator is 380V, TPN, 50Hz, 1500kVA, 12.3MVA fault level contribution.
The utility transformer LV side is 380V, TPN, 50Hz, 2000kVA, 24MVA fault level.
When coupled, the total fault level is about...
Dear Artisi, LittleInch, JJPellin, TugboatEng,
Thank you very much for your fruitful advices.
I understand more on the technical aspect and the trade practice now, with all your helpful replies.
I purchased a centrifugal pump (duty=333L/s at 130m head) coupled with a 3.3kV 710kW 1500rpm motor.
In the factory test, the manufacturer is going to verify the pump performance curve. I expect them will use the 3.3kV motor I purchased to perform the test. But they used a smaller motor of 380V...
