6ES7414-2XL07-0AB0 西門子控制系統

變頻器箱體結構的選
變頻器的箱體結構要與環境條件相適應，即考慮溫度、濕度、粉塵、酸堿度、腐蝕性氣體等因素。常見有下列幾種結構類型可供用戶選用：
1）敞開型IPOO型本身無機箱，適用裝在電控箱內或電氣室內的屏、盤、架上，尤其是多臺變頻器集中使用時，選用這種型式較好，但環境條件要求較高；

2）封閉型IP20型適用一般用途，可有少量粉塵或少許溫度、濕度的場合；
3）密封型IP45型適用工業現場條件較差的環境；
4）密閉型IP65型適用環境條件差，有水、塵及腐蝕性氣體的場合
變頻器容量的確定
合理的容量選擇本身就是一種節能降耗措施。根據現有資料和經驗，比較簡便的方法有三種：
1）電機實際功率確定發。首先測定電機的實際功率，以此來選用變頻器的容量。

2）公式法。當一臺變頻器用于多臺電機時，應滿足：至少要考慮一臺電動機啟動電流的影響，以避免變頻器過流跳閘。

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