What is "galley shed"
 

I can't seem to understand the concept.
"When one generator is operating in flight, the main galley is automatically shed".
What exactly happens?

When a generator is working over 100%, and you switch the galley pb switch to off, what exactly happens?

Can somebody please elaborate a little more and explain to me what the concept of galley shed is in the first place?
Sorry for the(to some people) silly questions. :}

The galley, with its ovens and lights and whatnot, is a main user of electricity, yet is also completely unnecessary in terms of safe operation of the aircraft.

Whenever electricity is scarce, there is a simple switch to stop power going to the galley ("shed" in this sense meaning "To rid oneself of"), preserving power for more important uses.

Got you.
Can somebody also tell me why do we use the "GEN 1 LINE" pb.
I know it is a smoke drill in the avionics bay, but I read some other place that the drill is just the extract and blower PB put to over ride.
Not sure when to use which drill, and not sure what exactly the gen 1 line pb does.

Anybody?

Its essentially the same as EMER ELEC but you keep all your
fuel pumps. The elec distribution is the same as it is in EMER
ELEC except that in smoke configuration the fuel pumps are
connected upstream of the GEN 1 line connector. Proc sheds
roughly 75% of electrical equipment.

All explained in DSC 24 10 30 30 p19 of the new Airbuspeak
book.

It's not to be confused with the lavatory shed, as demonstrated in this clip.

Yorkshire Airlines - YouTube

When Mr Airboos first spoke of "galley shed" I thought it was
where the catering trucks go to load up the inflight meals.