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  1. NicolasK

    AMR

    Does anyone have any experience with Hexagram AMR systems? Likes/dislikes Thanks.
  2. NicolasK

    Connecting Transformers in Series

    I need to supply 480V to some parking lot lights.
  3. NicolasK

    Connecting Transformers in Series

    The secondary side is one hole lugs. I'm checking with the manuf. of the rating.
  4. NicolasK

    Connecting Transformers in Series

    I want to connect the secondary side of two 120/240V transformers in series to get 480V. The transformers are 10 kVA units (additive polarity). The H1 bushings will be tied to the same primary phase, each with its own fused protection (cutout). H2 bushings will be tied to the system neutral...
  5. NicolasK

    Transformer losses

    True jghrist, but when the cost to change the transformer out is in the thousands of dollars (cost to my company and the customer due to down time) and the cost difference between the transformers is only a thousand...... I thought there would be more to consider.
  6. NicolasK

    Transformer losses

    If the losses are half when a transformer is only 25 or 50% loaded, then why is the rule of thumb to install a transformer that is approximately equal to the load? What am I missing?
  7. NicolasK

    Transformer losses

    If a transformer (three or single phase, pole or pad mount) is only 25, 50 or 75% fully loaded what amount of losses are there compared to a fully loaded transformer?? I'm trying to determine if it is cost effective to change out a transformer that is not fully loaded by comparing the cost of...
  8. NicolasK

    Donut and Bushing CT's

    Does anyone know how the metering accuracy will change depending on the location of a cable or bus through a CT? I know it is recommended a cable or bus be as closely centered as possible in a CT. Also, the metering accuracy decreases when the cable or bus is not centered. But, I'm looking...
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