 At this time, PreussenElektra had installed a second cable between their transformer stations near Lehrte and Misburg.This was used for the experiments which initially only ran for a few hours at night time due to the requirements for a steady supply of electrical power, and which were extended to two or three days in 1944.The plant went into service in 1942 and was designed for the transmission of up to 16 MW at a voltage of 80 kV.