an induction motor takes 1.5KVA to 440v and has a delayed F.P of 75% What should...
an induction motor takes 1.5KVA to 440v and has a delayed F.P of 75% What should the F.P. of a load of 10 KVA connected in parallel so that the F.P. rise to 1.00?
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an induction motor takes 1.5KVA to 440v and has a delayed F.P of 75%
What should...
a 3 phase 440v induction motor has produced an output power of 75 hp and full...
a 3 phase 440v induction motor has produced an output power of 75 hp and full load efficiency of 91% and power factor of 83%. A calculate nominal line current B if stator resistance per phase is .1omh what are copper losses at stator ? C if losses are 1.2 kw what is power delivered to rotor d determine i2r losses in rotor . E what is slip f synchronous speed is 1800 rpm what is the speed of motor
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when...
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when it operates at rated load. Calculate the following 1. Number of poles of the machine. 2. slip at full load. 3. Rotor frequency. 4. speed of rotor field with respect to the stator. 5. speed of the rotor magnetic field with respect to the stator magnetic rotating field.
A three-phase induction motor delivers 500 hp at an efficiency of 0.91, the operating power factor...
A three-phase induction motor delivers 500 hp at an efficiency of 0.91, the operating power factor being 0.76 lagging. A loaded synchronous motor with a power consumption of 100 kW is connected in parallel with the induction motor. Calculate the necessary kVA and the operating power factor of the synchronous motor if the overall power factor is to be unity. Answer should be 365 kVA, 0.274
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency...
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency 89% and power factor 0.85 lagging. Calculate: A) The total KVA rating of capacitor required to rise full load power factor to 0.95 lagging. B) What is capacitance per phase if capacitor: 1) Delta connected. 2) Star connected.
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955...
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955 rpm and rated torque of 35 Nm. This motor drives a load with a torque characteristic that increases linearly with speed such that it equals the load torque at the rated speed. It draws a current of 2.1 A(rms) per phase at the rated voltage at a power factor of 0.81 (lagging). The stator resistance Rs = 2.0 ohms. At the rated operating speed,...
d) A 440V, 50 Hz, 4-pole, 3 phase induction motor has a total leakage impedance of (0.3 +j5.5+0.25/s) ohm (delta phase)...
d) A 440V, 50 Hz, 4-pole, 3 phase induction motor has a total leakage impedance of (0.3 +j5.5+0.25/s) ohm (delta phase). Determine the external resistance to be inserted in each phase of the rotor winding such that the motor produce a gross torque of 130 N-m at a speed of 1300 rpm. (10 Marks)
d) A 440V, 50 Hz, 4-pole, 3 phase induction motor has a total leakage impedance of (0.3 +j5.5+0.25/s) ohm (delta phase). Determine the external resistance to...
1. A three-phae, 4-pole, 75 kW, 460-V induction motor has the following single-phase equivalent c...
Please answer questions 4-6 not number 1. Number 1 is for the
values in the circuit only
1. A three-phae, 4-pole, 75 kW, 460-V induction motor has the following single-phase equivalent circuit parameters in ohms-per-phase: R 24.5 x 103, R2 55.2 x 103, X 0.267, X2 0.277, X 19.8 4. This motor is now connected to a power grid through a transmission line. The grid and transmission line are represented by a Thevenin equivalent voltage source at 1 pu with...
A three phase induction motor draws a starting current which is five times the full load...
A three phase induction motor draws a starting current which is five times the full load current with direct on line starting, while developing twice the full load torque. Q2.1. Based on the two facts that starting current is proportional to the applied voltage and that the starting torque is proportional to the square of the applied voltage, determine voltage (as a per cent of rated voltage) required to obtain a starting torque equalling the full load torque. (10 marks)...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of impedances, each having a resistance of 10 Ω and an inductive reactance of 8 Ω Calculate the capacitance of delta-connected capacitors required to improve the overalil power factor to 0 95 lagging [14] TOTAL 1001
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system...
3, A 34, 400-V 50-Hz induction motor takes 4 times the full-load current and develops twice the f...
3, A 34, 400-V 50-Hz induction motor takes 4 times the full-load current and develops twice the full- load torque when direct-switched to 400-V supply. Calculate in terms of full-load values (a) the line curent, the motor current and starting torque when started by an auto-starter with 50% tap and (b) the voltage that has to be applied and the motor current, if it is desired to obtain full-load torque on (a) 100%, 200%, 50% (b) 228 V, 282%) starting...
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when it operates at rated load. Calculate the following 1. Number of poles of the machine. 2. slip at full load. 3. Rotor frequency. 4. speed of rotor field with respect to the stator. 5. speed of the rotor magnetic field with respect to the stator magnetic rotating field.
d) A 440V, 50 Hz, 4-pole, 3 phase induction motor has a total leakage impedance of (0.3 +j5.5+0.25/s) ohm (delta phase). Determine the external resistance to be inserted in each phase of the rotor winding such that the motor produce a gross torque of 130 N-m at a speed of 1300 rpm. (10 Marks)
d) A 440V, 50 Hz, 4-pole, 3 phase induction motor has a total leakage impedance of (0.3 +j5.5+0.25/s) ohm (delta phase). Determine the external resistance to...
Please answer questions 4-6 not number 1. Number 1 is for the
values in the circuit only
1. A three-phae, 4-pole, 75 kW, 460-V induction motor has the following single-phase equivalent circuit parameters in ohms-per-phase: R 24.5 x 103, R2 55.2 x 103, X 0.267, X2 0.277, X 19.8 4. This motor is now connected to a power grid through a transmission line. The grid and transmission line are represented by a Thevenin equivalent voltage source at 1 pu with...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of impedances, each having a resistance of 10 Ω and an inductive reactance of 8 Ω Calculate the capacitance of delta-connected capacitors required to improve the overalil power factor to 0 95 lagging [14] TOTAL 1001
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system...
3, A 34, 400-V 50-Hz induction motor takes 4 times the full-load current and develops twice the full- load torque when direct-switched to 400-V supply. Calculate in terms of full-load values (a) the line curent, the motor current and starting torque when started by an auto-starter with 50% tap and (b) the voltage that has to be applied and the motor current, if it is desired to obtain full-load torque on (a) 100%, 200%, 50% (b) 228 V, 282%) starting...
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