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普通的變壓器容量有多大,怎么選擇變壓器容量?

發表時間:2021-05-05 18:18【 閱讀量:-查看手機網址
掃一掃!普通的變壓器容量有多大,怎么選擇變壓器容量?掃一掃!

  選擇變壓器容量的原則?


  首先,檢查用電場所的電源電壓,用戶的實際負載和場所的狀況,然后參考變壓器銘牌上標記的技術數據,逐一進行選擇。通常,應綜合考慮變壓器的容量,電壓,電流和環境條件。容量選擇應為:根據用戶電氣設備的容量,性質和使用時間選擇變壓器容量,確定所需負載。


  在正常操作中,變壓器上的電氣負載應約為變壓器額定容量的75%至90%。在運行中,當變壓器的實際負載小于50%時,應更換小容量變壓器。如果大于變壓器的額定容量,則應立即更換大型變壓器。同時,在選擇變壓器時,根據線路電源確定變壓器初級線圈的電壓值,并根據電氣設備選擇次級線圈的電壓值。


  低壓三相四線電源的最佳選擇。這樣可以同時提供電源和照明電源。在選擇電流時,應注意的是,電動機啟動時負載可以滿足電動機的要求(因為電動機的啟動電流是灌電流的4到7倍)。


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