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  1. Starforever

    Question about soft starters?

    Scenario; In tunnel we are installing truly reversible axial smoke exhaust 2-speed fans (1450/750) with 5.5/1.1 kW to run on day to day ventilation (low speed) and to run during fire mode ( high speed). But DOL is recommended by manufacturer because when the fan goes in to high speed fire mode...

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