The developments mark two new milestones for the company in the field of power transmission.
The company said that the XLPE and mass impregnated PPL technologies have demonstrated its robustness and reliability to the highest voltage levels.
Prysmian Group energy projects senior vice-president Massimo Battaini said: "It is the first time in the cable industry that voltages at these high levels have been achieved.
"These are also the first developments in cable technology that enable HVDC power transmission systems beyond 3GW per cable bipole, and as such, are capable of more than double the power transmission capability of DC cable systems currently in service."
The cables have been developed to increase the power transmission capability by up to 15% beyond the previously highest voltage 525kV XLPE technology and beyond that currently achieved with 600kV PPL technology.
The company earlier announced its successful testing of the 525kV DC XLPE and 525kV P-Laser cable solutions in December 2015 and March 2016, respectively.
In order to address the challenges of optimizing reliable processes and providing complete systems of cable and accessories, Prysmian used its extensive and in-depth knowledge of materials and its ability to improve manufacturing approach.
