Q: How do I know what values to enter for motor efficiency and power factor?

There are many different manufacturers of electric motors, and each manufacturer may make multiple variants (e.g. regular and "high-efficiency"). Each of these motors may have different performance characteristics—the NEMA standard specifies only a minimum efficiency at rated power—it does not specify what the actual efficiency is, nor does it address loading at less than rated power. C-FER does not include motor performance data for surface motors in PC-PUMP. Product literature for the actual motors your company is using should be available from the motor vendors, and you should be able to get efficiency and power factor values for the motors from that literature. Note that both efficiency and power factor will drop at loads less than the motor's rated load, so if the product information only contains efficiency and power factor at rated load, this may not apply if the motor is lightly loaded.

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