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公式: I=P/U/cosφ 以1KW白熾燈或電熱器為例,其功率因數cosφ=1,電流: I=P/U/cosφ=1/0.22/1≈4.55(A) 若以1KW電機滿載運行為例,其功率因數cosφ≈0.85附近,電流: I=P/U/cosφ=1/0.22/0.85≈5.4(A)
根據:電流I=功率P/電壓U 220v1千瓦的電流大約4.54A. 供你參攷!
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