"Some evidence indicates… that something was done to ensure that the operation system of the computers [at the Guri Dam] decides that the [turbines] rotation speed had decreased," the source said.
According to him, the frequency of turbines rotation should amount to 60 hertz and can fluctuate within "plus-minus 1 percent," but in this case, the frequency "dropped from 60 to 52 hertz, which is equivalent to a load of 2000 megawatts."
Any frequency fluctuation of more than 1 percent has to trigger a warning in the system, which, however, did not happen, the source added.
The government official revealed that the national electrical system was currently being recovered, adding that there were plans to reduce the country's dependence on energy generated by Guri.
According to the source, the government hopes to put into operation the most important equipment to restore power grids and fully stabilize the electricity distribution system within 30 days.
READ MORE: Venezuela Minister Posts PHOTOS of 'Attacked Power Plant' to Show Blackout Cause
In early March, Venezuela suffered its worst power outage in its history with the electricity failure happening in 21 out of 23 states. The authorities said the incident had been caused by "sabotage" at the country's Guri hydroelectric power plant, which generates electricity for nearly the entire country.
Major power outages continued across Venezuela later in March. Caracas has said that the country's power system had suffered several attacks and blamed them on Washington which denied the claims.
READ MORE: Electricity Supply Restored to Nearly All of Venezuela Following Blackout
