By Reuters Staff 2 Min Read OSLO (Reuters) - Norway will start testing on June 15 its first power interconnector with Britain, North Sea Link (NSL), Norwegian transmission system operator Statnett said on Tuesday. The testing of the cable follows the opening last month of Norway’s first direct power link to Germany, the 1,400 MW NordLink interconnector. Both Germany and Britain aim to benefit from Norway’s vast hydropower resources to help to balance their intermittent wind power, while Norway can import cheap surplus renewable energy to save water in its hydropower reservoirs. Norway’s electricity is almost all hydropower based. Norway is already connected to the Netherlands via the 700 megawatt (MW) subsea interconnector NordNed and to Denmark through the Skagerrak connection.