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  1. 12-11-2015 #1
    dudz's Avatar
    Lives in Dunedin, New Zealand.
    dudz
    Last Activity: 09-02-2025 Has a total post count of 295. Received thanks 2 times, giving thanks to others 79 times.
    I have bought a 3 phase air compressor. Its 4kw (5Hp) 380v (French voltage) 50Hz. It was wired in star, I have changed it to delta. So I can run it on 220v three phase. Now I know I can possibly run it on single phase if I put a capacitor across two of the winding's. I saw someones calculations on the internet. Please tell me if I have worked this out right ? ;

    14u/A x 10.5A = 147uf

    So I guess I need a 220v / 147uf inline Capacitor ?

    Click image for larger version.  Name: phase.gif  Views: 2004  Size: 3.0 KB  ID: 16521
    Last edited by dudz; 12-11-2015 at 09:43 PM.
    Swedish Storbro Luna - 3 axis CNC mIll - 250 - 2500rpm / 1.1 tonne

    3 axis CNC/router / Alu profile frame....25mm Alu Cutting bed X=500mm Y=300mm Z=110mm.....Supported 25mm X rails ....Supported 20mm Y rails....Supported 20mm Z rails.....2.2kw Chinese WC spindle..... CSLAB CSMIO/IP-M 4-axis Ethernet Motion Controller....M542 Drivers..SY60STH86-3008BF Motors...running....Mach3 / Cambam / Emachineshop.
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