ka9q
Member
This is quite plausible. Grid tie inverters are required to have all sorts of safeguards to avoid feeding power into a dead or damaged grid. If the voltage or frequency is too high or low, it's supposed to disconnect and wait for it to restabilize before reconnecting. So I can easily believe that three-phase inverters are required to monitor phase imbalance (angles, voltages, etc) and trip if they're too far out of whack.If there is low solar output at our shop, and you turn the HPWC on to 42 amps, it will sometimes crash the inverter. I think it's due to an unbalanced load.
A single broken primary phase is a very common failure in a distribution network. When this happens, one third of the single phase loads on the secondary are unaffected while the remaining two thirds are connected in series across the remaining healthy phase. This happened once in my neighborhood when an aerial 12kV wire pulled out of a deadend insulator. The burn marks on the iceplant were visible for some time. Fortunately nobody was walking under it at the time.
Does the inverter eventually reconnect after your car has been charging for a while, or does it have to be manually restarted?
This is one thing the Europeans got right -- making 3-phase the standard for AC charging.
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