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  1. powersmp

    Line Drop Compensation

    Thanks for all of the feedback. The "low" voltage we're seeing is 5% less than the service voltage we state in our service agreement, which is 120V. So, at the customer, we are seeing less than 114. Actually, their service is 277/480V and they're seeing 260V. This has only happened recently...
  2. powersmp

    Line Drop Compensation

    jghrist - your question of trying to get them to explain it to me is exactly my problem. A lot of people here seem to just follow what's been done and don't try to figure out why. My understanding of the compensation is similar to the others that are posting, but I'm being told that it's not...
  3. powersmp

    Flywheel UPS, 500 - 1000KVA

    I know American Electric Power has a flywheel set up. Maybe contact someone with them and see what they spec'd it out to be.
  4. powersmp

    Line Drop Compensation

    It should be a 2000/120 ratio. The station CT ratio is 400/.2 or a 2000/1. You're suggesting not setting X is going to undercompensate for the line loss. Is there any way to raise the R to compensate for that? I'm told the X setting is too sensitive when cap bank fuses blow on the line.
  5. powersmp

    Line Drop Compensation

    It's an express feed, so there really are no customers close to the station (not within 8000 ft). I'm pretty sure we don't have a "first house" protection on because I talked to the individual that sets the settings and he said he doesn't know what that is, and I've never dealt with it...
  6. powersmp

    Line Drop Compensation

    We have 2000kft of 750 MCM (UG conductor) and 6000kft of 556 AL. It's a 3 phase, wye connected regulator set at a base of 114/110. Currently it's set to X=0, R=2 with a ct ratio of 400/.2 and pt of 120/1. It runs at 13.2kV. It's a 750/937 KVA SFR reg. After all was said and done, I calculted...

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