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IndustryArena Forum > CNC Electronics > Servo Motors / Drives > Main current for a drive? (BRU-200)
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  1. #1
    Join Date
    Feb 2007
    Posts
    11

    Main current for a drive? (BRU-200)

    Hello,
    I have to choose a contactor and a circuit breaker for a brushless drive BRU-200 but I don't know what I have to look up. The output of the drive is a sinusoidal output. I know :
    motor : sine wave torque constant 0.74Nm/A
    peak torque 19.7 Nm
    drive : peak current per phase : 30A
    nominal current per phase : 15A
    output power : 3kW
    DC bus voltage : 325V
    input voltage AC 1-phase : 230V

    How can I find the input current and the input power?

    Thanks a lot.

  2. #2
    Join Date
    Jun 2003
    Posts
    866
    you can find the manual at this link:
    http://rapidshare.com/files/34181307/bru200.pdf.html

    Never mind all the advertising. Just do the free download on the second page. There are all sorts of wiring diagrams in the back.

    I guess it depends on your installation. I'm guessing from the ratings that they are going to want you to have 40 amps or so available. In my application, I don't think that I'm really going to pull that kind of power. And since the input is only single phase, they don't seem to believe the max rating themselves anyway. If your circuit is under-rated for the drive capabilities, you probably should fuse the supply at the drive.

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