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  • Users: fijensen
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  1. fijensen

    Autotransformer start on 4,000 HP 3 stage air compressor, activating at full speed?

    I'm an elecrical specialist. I've been working on MV motors, and controllers for many years. I recently had a call to a facility with mystery trips on a compressor (see title). They had some data recorded by the DCS which showed the current increased from 280 to 500 amps, at which time the...
  2. fijensen

    Ammeter connected through parallel CT's?

    First of all; I'm a tech not an engineer. This doesn't look right to me at all. I'm thinking the ammeter (ACA) is only going to see the unbalance between A and C phases (jumper on right of PFFR relay). I don't know what the formula for this would be, but in the past I've always seen an ammeter...

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