Photo by delta_avi_delta 

Researcher Jussi Palola from Helsinki Energy has sent us the following information:

"The load of Salmisaari substation decreased 2 MVA on 29 February 2008 between 7-8 pm. The normal value for decrease during this time is 1,2 MVA, so the effect of the UNPLUG event is approximately 800 kVA."

This is the effect of 4,000 residents and 5 large scale companies in  Ruoholahti participating the Unplug event. Since Salmisaari substation also measures energy consumed also by those living in Lauttasaari, which includes  over 30,000 residents, this is avery sucessful result!