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45.4 Harmonic distortion7 ]. u. x; V( ]7 F6 m
45.4.1 For a stand-alone inverter, the total rms of the harmonic voltages, excluding the fundamental delivered, shall not exceed 30 percent of the fundamental rms output voltage rating. The rms voltage in any single harmonic shall not exceed 15 percent of the nominal fundamental rms output voltage rating.5 {/ J2 H& b' Z0 A" E. Q2 }
The measurements are to be made with the inverter delivering 100 percent of its rating to a resistive load., t: i$ x' h! b
Exception: A unit having total rms harmonic voltages exceeding 30 percent of the fundamental rms output voltage rating meets the intent of the requirement when the inverter is marked in accordance with 63.28.9 O7 n2 E8 m( F- Y, b
各位大侠, 谁了解这个测试怎么做, 求解答, 感谢
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