Unbalance three phase loads
Unbalance three phase loads
(OP)
I need to know how much current unbalance is acceptable for a three phase delta load. One phase will draw 37.5A, the second one 33A, and the third one 30A. I calculated the unbalance of current to be about 12%. A potential problem is that one of the legs will be switched off, thus dropping the current to zero in that leg. Is this acceptable? Or do I need to balance the loads. The voltage unbalance is less that 3%.






RE: Unbalance three phase loads
RE: Unbalance three phase loads
RonH
RE: Unbalance three phase loads
RE: Unbalance three phase loads
RE: Unbalance three phase loads
RE: Unbalance three phase loads
RE: Unbalance three phase loads
I have a similar scenario. My power factor is anticipated to be between 0.8 and 0.9, but my imbalance looks to be to much. The current between the phases varies with one phase at 35 amps and another at 13 amps the third phase would be also around 13 amps. All the loads are single phase (lighting, power supplies battery chargers, inverters). The three phases are "Y" connected to a distribution panel and the three phases are basically used independantly. The whole system could have been designed with a single phase.
Other than high neutral currents what kind of problems would such an imbalance create.
RE: Unbalance three phase loads