Can anyone explain how load management is installed?

[Jefferson steelflex]

Hi,

I've recently come across properties with high loads exceeding max demand, especially hmos
I've heard about load curtailment and relays where when one heavy load is used another cannot be used.
Can anyone provide information about devices used and how to wire them.

 

[Lister1987]

The likes Of EV chargers use CTs on the incoming tails to see what the installation is using and then throttles thr charger accordingly to stay below a user defined limit.

 

[brianmoooore]

There are also shower priority units, for two high powered electric showers on a standard domestic supply. They use relays to control power to the showers, and operate on a simple first come, first served principle.
Garo is associated with many of these.