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  1. ryaneewgi

    VFD fed from UPS-Harmonics issues?

    I have a situation that requires 125HP pump motors (currently fed from VFD's) to be provided with uninterruptible power, they must run during an outage. One proposed solution is to use large UPS's (~250kVA) to feed each VFD. There are some concerns brought up by myself and others regarding...

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