how to find the power consumed by motor from nameplate
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A 6 pole 3-phase AC induction motor is delta-connected and has the following rated values on its nameplate:
Frequency: 50 Hz
Power: 22 kW 30 hp
RPM: 970
cosϕcosϕ (power factor): 0.80
Primer voltage (VlineVline): 380 V
Primer current (IlineIline): 47 A
Since the total power of a 3-phase AC induction motor when delta-connected is
Pt=3–√⋅Vline⋅Iline⋅cosϕPt=3⋅Vline⋅Iline⋅cosϕ
I calculate the electrical power as
Pt=24.75kWPt=24.75kW
but on the nameplate there are two powers, written as 22 kW and 30 hp (30 hp is 22.37 kW); are they the same thing?
Why am I calculating the power PtPt differently? Are the power ratings on the nameplate mechanical power or electrical power?
Frequency: 50 Hz
Power: 22 kW 30 hp
RPM: 970
cosϕcosϕ (power factor): 0.80
Primer voltage (VlineVline): 380 V
Primer current (IlineIline): 47 A
Since the total power of a 3-phase AC induction motor when delta-connected is
Pt=3–√⋅Vline⋅Iline⋅cosϕPt=3⋅Vline⋅Iline⋅cosϕ
I calculate the electrical power as
Pt=24.75kWPt=24.75kW
but on the nameplate there are two powers, written as 22 kW and 30 hp (30 hp is 22.37 kW); are they the same thing?
Why am I calculating the power PtPt differently? Are the power ratings on the nameplate mechanical power or electrical power?
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