Hi to everyone. I am new on this forum, and I do not see any existing threads on this specific issue that I have.
I have recently inspected a 40kW 3Phase grid tie inverter installation that is purely used to supply a 3-phase 400VAC water pump. The grid is supposed to supply the deficit when the Solar power is less than what the pump requires. The pump draws 38Amps per phase. Since the Grid, Inverter and pump are all connected to a common bus on all 3 phases respectively, the wiring can be compared with a Capital - T for each phase.
When I measure the current simultaneously on all 3 'branches', I get the following readings per phase: The pump 'branch' =38A, the Inverter 'branch' = 36A, and the Grid 'branch' = 30A. The inverter LCD display at the time indicated about 24kW. I expected the Grid to only supply the shortfall of 2Amps to the pump, but now I see 30Amps.
What can the explanation be for this? I believe that the inverter LCD reading can be trusted, but yet the Amps does not make sense. Any advise, please?
I have recently inspected a 40kW 3Phase grid tie inverter installation that is purely used to supply a 3-phase 400VAC water pump. The grid is supposed to supply the deficit when the Solar power is less than what the pump requires. The pump draws 38Amps per phase. Since the Grid, Inverter and pump are all connected to a common bus on all 3 phases respectively, the wiring can be compared with a Capital - T for each phase.
When I measure the current simultaneously on all 3 'branches', I get the following readings per phase: The pump 'branch' =38A, the Inverter 'branch' = 36A, and the Grid 'branch' = 30A. The inverter LCD display at the time indicated about 24kW. I expected the Grid to only supply the shortfall of 2Amps to the pump, but now I see 30Amps.
What can the explanation be for this? I believe that the inverter LCD reading can be trusted, but yet the Amps does not make sense. Any advise, please?
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