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  1. tajin23

    Sizing a drive transformer

    I don't know if this forum is more proper for this question than in the power Engineering forum I did it yesterday. As per my Manager instructions I always sized up a drive isolation(voltage match) transformer for continuous operation based on KVA load demanded from the controllers for...
  2. tajin23

    motor winding connection: WYE VS. DELTA

    The main difference will be the phase current, in wye connection the phase current is the same as the line, in delta phase current is square root of 3 of line current. Using delta connection in a motor is very usefull on oscillating loads, or reciprocant machines such as compressors, line...
  3. tajin23

    Power Frequency Variations

    Is still in use making zero freq error at the end of the day?. Seems like you are widened the band for frequency contribution, which will allow poor regulation machines to contribute to the system, in some cases the problem is also time response not just wide the freq band, as you said wind...
  4. tajin23

    Sizing up a drive transformer

    As per my Manager instructions I always sized up a drive isolation(voltage match) transformer for continuous operation based on KVA load demanded from the controllers for continuous mode S1 operation, controller load in some cases were bigger than drive HP. Now my Manager have instructed me to...

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