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Thread: Rewiring Transformer for 230V Input

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  1. 05-19-2010, 11:05 PM #1
    keebler303
    keebler303 is offline Gold Member
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    Rewiring Transformer for 230V Input

    I recently bought a new lathe and I am working on getting it running. The DC spindle drive requires 460V 3 phase. I only have 230V 3 phase. The lathe has a transformer in it which is currently setup as an isolation transformer. 460 in and 460 out. The transformer is constructed from three separate transformers which are wired together. The attached schematic shows the existing wiring, how do I determine which wires I need to change to get 230 in and 460 out? It looks like there are 2 windings on the primary and its just a matter of series vs. parallel but I'm not sure how to go about determining which ones to connect.

    Thanks for any help
    Matt
    Attached Thumbnails Attached Thumbnails transformer wiring.jpg  
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