the label values of the 3-phase asynchronous motor are; 380V, 5A, 50Hz power factor; 0.8, 1.9kW. what is the efficiency of this engine at full load

A 400V, 50Hz 30hp three-phase induction motor is drawing  current at  power factor 0.8 lagging. The stator and rotor copper losses are 1.5kW and 900W respectively. The friction and windage losses are 1050W and the core losses are 1200W . Find the air-gap power of the motor.

23. As load is increased from no load to full load on a 3-phase squirrel-cage induction motor, what happens to the ..

2.. A three-phase 60 Hz asynchronous motor runs at 890 rpm at idle and 840 rpm at full load. ww w w www wwww a) How many poles does this motor have? b) What will be thę slip at nominal load? c) What happens if the nominal load is slipping at half? www. d) What is the electrical frequency of the rotor at half the nominal load? wwww

A certain 60Hz, four-pole split-phase induction motor spins at 1760rpm when running with no torque load. Find its slip at no load. A. 1800rpm C. 1150rpmB. 90rpm D. 40rpm

B. Open-Ended Question 6. A 45 hp, 50 Hz, 415 V delta connected induction motor has a full load efficiency of 0.80 and p.f0.60. The p.f is to be improved to 0.9 using static capacitors. Determine (i) rating of capacitor bank kVAR, (ii) capacitance of each unit, if they connected as (a) delta, and (b) star, in uF. 7. Figure 1 shows the electrical power system with rated capacity of S₁= S₂=25 MVA, connected with two step-up transformers 11 kV/66 kV, respectively. The short circuit fault at point 'p' occurs at the outlet of transmission line. Calculate the short circuit current and three phase short circuit capacity occur at the point 'p'. S₂=25 MVA G₁ % Xg1 = 30 T₁ % XT1= 5 Transmission line 11/66 kVA S₂=25 MVA T₂ CB ~) G₂ % Xg2 = 30 % XT2 = 8 11/66 kVA

The figure below shows the per-phase equivalent circuit, referred to the stator. of a 400V. 50 Hz. four-pole, star-connected, wound-rotor, three-phase induction motor. What is the ratio of motor maximum torque to starting torque? j120 0.54 Ω. j 0.56 Ω E mm. 27.0 0.43/50

The name plate of single phase induction motor has following data output 373W,230V, frequency 50Hz. Input current 2.9A and power factor is 0.71. Speed 1420 rpm What is efficiency of motor.

Synchronous motor can operate at O a. Unity power factor only out of O b. Leading power factor only uestion O c. Lagging, leading and unity power factor only O d. Lagging power factor only us page

im curious about #5 but its based on #4!