1.1.2 What formula is used to calculate the reactive power of a 400V motor?
Here's an example:
A 400 volt three-phase standard motor has a rated current of 34.516 amperes and a sin φ of 0.92.
What electrical binding power results from these specifications?
Q = U x I x sin φ x √3
Q = 400V x 34.516A x 0.92 x √3
Q = 22 kWAr
Units of measurement:
Reactive power Q = kilovolt ampere reactive [KVAr]
Voltage U = Volt [V]
Current I = Ampere [A]
sin φ = no unit of measurement
√3 or 1.73 = without
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