Another consideration is the relationship. between insulation class, temperature rise, and ambient temperature. The insulation. class rating designates the maximum. operating temperature for a winding. The. temperature rise is the difference between the.
China claims it has discovered the world's largest hole, and it's in one of the most dangerous places on the planet. 1  Jul.  Good news: China claims it has discovered the world's largest hole. On Wednesday, state broadcaster CCTV announced that the newly found dragon's hole, a 984-foot (300-meter) cavern in the disputed waters of the South China Sea, is now the world's largest hole.
Along with the space agency, the National Oceanic and Atmospheric Administration (NOAA) keeps a constant watch on the hole above the Antarctic, which reached its annual peak on 11 September. The size of this yearâs hole at its largest point was 9.3 million square miles (24.1 million square kilometres) â almost identical to the maximum in 2013. It is far smaller than the largest single-day ozone hole ever recorded by a satellite, which was 11.5 million square miles (29.9 million square kilometres) in September 2000.