1.0 0.9 0.8 0.7 277V 0.6 230V 115V 0.5 0.4 0.
92% 90% 88% 277V 230V 115V 86% 84% 82% 80% 78% 10% 20% 30% 40% 50% 60% 100 Vo(%) Constant Current area 60 (min.
