... :UL,CE, VDE, ISO Step angle: 7.5 Reduction Ratio:1/60 We have been certificated by the ISO90001:2000, CCC ... HzInsulation Resistance≥50MΩ (DC.500)Dielectric StrengthCondition of AC, 600V, 1 mA. 1Second: No BreakdownTemperature Rise≤40 KNoise≤30 dB(A ...