pf (lagging) Efficiency (%) 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 110 Motor Loading (%) The relationship between % of full load for each motor and power factor (they are all the same) is given by the graph below: 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 Motor Loading (%) и 27.9 kVRMS 400 VRMS M M M Motor 1 80 hp Motor 2 80 hp Motor 3 80 hp
pf (lagging) Efficiency (%) 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 110 Motor Loading (%) The relationship between % of full load for each motor and power factor (they are all the same) is given by the graph below: 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 Motor Loading (%) и 27.9 kVRMS 400 VRMS M M M Motor 1 80 hp Motor 2 80 hp Motor 3 80 hp
pf (lagging) Efficiency (%) 110 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 110 Motor Loading (%) The relationship between % of full load for each motor and power factor (they are all the same) is given by the graph below: 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 Motor Loading (%) и 27.9 kVRMS 400 VRMS M M M Motor 1 80 hp Motor 2 80 hp Motor 3 80 hp
Each motor is rated at 80 hp but is only loaded mechanically as follows: Motor # % Loading 1 40 2 50 3 70
The relationship between % of full load for each motor and efficiency (they are all the same) is given by the graph below:
a) What is the minimum required transformer rating in kVA? b) By what percentage could the required transformer rating be reduced if a capacitor bank were installed in parallel with the motors, improving the power factor of the loadcentre to unity?
Branch of science that deals with the stationary and moving bodies under the influence of forces.
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