Pr eli mi na ry 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 0.84 277Vac 230Vac 0.82 0.80 0.78 50% 60% 70% 80% 90% 100% 86 82 78 74 70 66 62 58 54 50 46 42 38 34 30 10% 277Vac 230Vac 20% 30% 40% 50% 60% 70% 80% 90% 100%