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Hookup and parameters for Hitachi wj200-015lf

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  • #16
    Originally posted by kc5ezc View Post
    Thanks for some more ideas, Highpower. My lathe was originally a single phase machine so the contactors are also.
    I will add either a 3phase control or some other device to keep the lathe from starting after power failure.
    My lathe was originally singe phase as well. That is what I was getting at. You don't need to "add" anything if you just (re)use the machine's original contactor(s) to supply the power to your VFD.

    Is your VFD a single phase or three phase input?

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    • #17
      Most VFD's can be programmed to default to off when power failure occurs. On my Hitachi, I have to push a reset button on the front panel to restart it after a power failure. My lathe did not have contactors since the original drum switch was adequate for the 2-hp motor. I do have a DPST snap switch in a handy box mounted next to the VFD cabinet to control the 230V single phase power input to the VFD. If I am using the lathe during the day, I leave the power on but turn it off when shutting down the shop in the evening.

      RWO

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      • #18
        Originally posted by RWO View Post
        Most VFD's can be programmed to default to off when power failure occurs. On my Hitachi, I have to push a reset button on the front panel to restart it after a power failure.

        RWO
        That is true. The VFD will trip and set an alarm code but it will still be connected to the mains. I just figured that since I had the contactors there anyway I might as well take advantage of them. Sometimes when the power goes out around here we get several iterations of power surges when the transformer or sub-station tries to re-set, and the power comes on and back off again. We've lost a few electrical items in the house because of that. I tend to leave everything turned off until we are pretty sure the power is going to stay on.

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        • #19
          Originally posted by Highpower View Post
          My lathe was originally singe phase as well. That is what I was getting at. You don't need to "add" anything if you just (re)use the machine's original contactor(s) to supply the power to your VFD.

          Is your VFD a single phase or three phase input?
          The inverter is a three phase input model. I looked at the relays in the old power box again.
          They have three contacts so looks like they will work fine.
          Thanks for the input
          John Burchett
          in Byng OK

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