Have we lost a phase? EV charging point.

[ericmark]

Tomorrow I will take down the meter, I hope only a case of placing near the fuse, don't really want to open the boxes, but today a car able to use the full three phase output was recording 11 kW on their app, if it had been 7 kW would assume only using a single phase, should be 22 kW using three phases, but rest of the supply only uses a single phase, only the EV charging point uses three phases, so if we lost two phases we would not know.

Had I not been chatting to the car owner I would not have known, so one wonders how long we have been a phase down if we are a phase down. It's not some thing we check.

 

[flameport]

3 phase car charging doesn't necessarily mean the full 22kW - plenty of vehicles have lower rated chargers in them, 11kW being reasonably common.
Single phase doesn't mean 7.2kW either, as some vehicles only have a 6kW charger in them.
Charge rate also varies with other factors such as battery temperature, battery charge level, the cable being used and so on.

 

[Risteard]

3 phase car charging doesn't necessarily mean the full 22kW - plenty of vehicles have lower rated chargers in them, 11kW being reasonably common.
Single phase doesn't mean 7.2kW either, as some vehicles only have a 6kW charger in them.
Charge rate also varies with other factors such as battery temperature, battery charge level, the cable being used and so on.

I would go further to state that almost none of the vehicles capable of three-phase charging will charge at 22kW. The overwhelming majority have an on-board charger limited to a maximum of 11kW.

 

[Higgy28]

11kW would be 3-phase, almost all car's on board chargers are limited to ~3.6kW per phase (7kW single phase EVSE will make use of two of the charger phases).
If the car was truly capable of 22kW charging (very few are), one phase going down would have dropped the charge rate to 14.4kW, not 11kW.

 

[ericmark]

It seems if phase lost it displays a fault code, non contact meters seems to show all three phases there, but not a very good way to test.