Use 3phase input VFD on single phase?
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    Default Use 3phase input VFD on single phase?

    As the topic says, i have received a 3phase input inverter with a mill recently aquired. Can a ABB 3 phase input inverter be used by just giving it single phase input? I have single phase in my workshop and convert to 3phase with a RPC. If i can run the mill without the RPC (use 1phase line in and 3phase out) it would help immensely

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    Find ABB model number

    if (unable to find manual on internet)
    then ask question

    if (unable to find answer in manual)
    then ask question

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    Already have the model nr and manual, unable to find the answer there, could you perhaps help?

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    Quote Originally Posted by Rhynardt View Post
    Already have the model nr and manual, unable to find the answer there, could you perhaps help?
    Derate Three Phase VFD for Single Phase Power

    dee
    ;-D

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    Thanks dcsipo, thats the exact answer i was looking for.

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    Quote Originally Posted by Rhynardt View Post
    Already have the model nr and manual, unable to find the answer there, could you perhaps help?
    The derate factor is something I didn't want to mention until I looked at the documentation.

    What is the model name/number of the drive? You never know, someone might have the same model.

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    I recently called ABB with this exact question since the manual did not address it clearly (at least to me). Was momentarily disappointed in that the person answering the phone required me to give info in order to start an internal "trouble ticket". But within a minute they had me talking directly to an engineer who answered that question definitively as well as several other quick programming questions.

    And yes, my 7 1/2 hp 480V VFD operates fine on single phase input, though derated.

    Jim

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    Quote Originally Posted by Jim S. View Post
    And yes, my 7 1/2 hp 480V VFD operates fine on single phase input, though derated.
    Is your single phase 240V? 240V single phase into a 480V 3 phase VFD? I know very little about this. I never would have guessed that was an option.

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    Quote Originally Posted by ptsmith View Post
    Is your single phase 240V? 240V single phase into a 480V 3 phase VFD? I know very little about this. I never would have guessed that was an option.
    Step up transformer can be used to go from 240 to 480 prior to the VFD. There are a few VFDs sold in the UK that will step up 240 to 480VAC.

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    Quote Originally Posted by ptsmith View Post
    Is your single phase 240V? 240V single phase into a 480V 3 phase VFD? I know very little about this. I never would have guessed that was an option.
    480V single phase input. With derating, ABB engineer said that I could expect to get 3 1/2 - 4 hp from my 7 1/2 hp VFD. I simply used a step-up xformer to boost 240 single to 480V single phase as mksj points out above.
    Jim
    Jim


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