Load Shedding Breakers without Generator

[anachnujr]

Hi all-

Does anyone know of a residential Load Shedding system that will shut off non-priority loads? The idea here is to install a high current EV Charger (non-priority load) without upgrading the electrical service.

I've seen a few products made by Kohler, but I think they all need to be installed alongside an ATS.

Thanks.

 

[John120/240]

Hi all-

Does anyone know of a residential Load Shedding system that will shut off non-priority loads? The idea here is to install a high current EV Charger (non-priority load) without upgrading the electrical service.

I've seen a few products made by Kohler, but I think they all need to be installed alongside an ATS.

Thanks.

I think you got it right with the ATS. Or you could manually turn off breakers, but that is damn inconvenient. Hopefully others will chime In.

 

[kwired]

If main breaker is overloaded enough it trips, that will result in total load shedding

I suppose you could use a current sensing relay and set it to operate a contactor to shed load when a certain level is reached- but to work best you need it to not monitor the load being shed or as soon as you cut off that load - you may drop enough current that it is then able to come back on which will result in rapid cycling - not going to work out so well there. So this is likely going to involve monitoring one service or feeder conductors that supply the main premises loads and having a second service or feeder conductors not being monitored that supplies the load(s) to be shed.

ETA: of course you were trying to avoid upgrading service so that suggestion is not going to be all that acceptable, and may cost more then a simpler service upgrade anyway. Other alternative may not be so cost effective either - is to have more logic processing available in whatever you come up with to control things - I'm sure something can be done for a price - but is still likely higher then a simpler service upgrade.

Maybe you can leave existing equipment as is and properly add a second through sixth service disconnecting means and supply these loads from that?