The kitchen socket is out of power after the main electric switch of the family is off and then conn

If it is a three-phase switch, there may be a problem with the main switch, the easiest way to deal with it is to pull it down and send it on (the switch has a problem and it is recommended to replace it), and then check the sub-switch. If it is a single-phase line, check how many lines are outgoing, whether the crimping line is tight, and whether the sub-switch is normal.

Check the neutral wire on the socket line, it should be broken.