What is the RPM value?
RPM stands for Revolutions Per Minute and refers to the number of times that an engine rotates each minute. A generator with a RPM of 3000 therefore runs at twice the speed of a generator with a RPM of 1500. When a generator has a four pole alternator and a frequency of 50 Hz, 1500 RPM is the usual speed and when there is a frequency of 60 Hz, 1800 RPM is the usual speed.
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