ABB Drive 1800 KW capacity

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    I had seen one ABB drive with duel in put connection. it's in put supply fedfrom  a transformer's  Two secondary winding, this TransformerPrimary  is Delta  and secondary is Delta & Star. both are connected to Drive. I heard it is 12 puls configration.

    my question are,

    1, what is 12 puls configration??

    2, what is the advantges of that??

    3, how it will effect the system


    It's for controlling the thyristors (2 per each phase)  each allowing for half cycle pass and the other reversed to pass the negative half cycle.

    the adv. is speed control over this drive (it's generally put in wells) to control the flow.

    third harmonic is blocked because of delta connection in primary.


    Dear Friend,

    Thanks for the replay,

    IF U don't mind, Can U explain about the above answer. please consider is an extreem request as a good friend

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