A three-phase induction motor, 230-V, 60Hz, connected in Y, the tests were carried out without load and rotor blocked. The test data is presented below. Fixed(blocked), Pin Line Current Line Voltage Friction and wind losses= 15 W No load test 130W 0.45A 230V Rotor test 65W 1.2A 47V Resistance (DC stator between two terminals = 4.1 W Determine the parameters of the equivalent circuit of the engine.

A three-phase induction motor, 230-V, 60Hz, connected in Y, the tests were carried out without load and rotor blocked. The test data is presented below. Fixed(blocked), Pin Line Current Line Voltage Friction and wind losses= 15 W No load test 130W 0.45A 230V Rotor test 65W 1.2A 47V Resistance (DC stator between two terminals = 4.1 W Determine the parameters of the equivalent circuit of the engine.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

The following data are obtained for 7.5 hp, 28A, 4-pole, 208V, 60Hz, Y-connected stator squirrel cage three-phase induction motor. DC Test: Voc = 13.6V , Ioc= 28A No-Load Test: Vt= 208V , IA= 8.12A , Pout= 420W Locked-Rolot Test: Vt=25V , IA= 28A , Pin = 920W Calculate the per-phase equivalent circuit parumeters of this motor referred to the stator side. ?????
Open circuit tests carried out on a 3.5 MVA, 4.16 kV, 60 Hz, three phase star connected synchronous generator gave the following results:If (A):1015202530EL (kV):3.54.165.76.257.95In the short circuit test a field current of 20A was needed to circulate full load current. The armature winding resistance is 1.2Ω /phase, the field winding resistance is 500 Ω and the rotational loss is 250kW. Determine the power angle, the voltage regulation and the efficiency when the generator delivers rated load at terminal voltage of 4.4 kV and at 0.8 power factor leading.Draw the power flow diagram for the generator and include all values of power flows.
In a no load test, an induction motor took 15A and 500watts with a line voltage of 150V.If stator resistance/phase is 0.05Ω and friction and windage losses amounts to 150 watts,calculate the exciting conductance(G0) and susceptance/phase(B0).
- Reconnecting Induction Motors 6.a. The voltage in a 460-volt motor is changed to 425 volts. If the original torque was 125 lb-ft, the newtorque isA. 135 lb-ft.B. 117 lb-ft.C. 115 lb-ft.D. 107 lb-ft.6.b. If a 575-volt three-phase motor originally connected in 3-parallel △ is reconnected in 5-parallel Y, thenew voltage isA. 501 volts.B. 794 volts.C. 598 volts.D. 747 volts.
Consider a induction motor (slip-ring) having a three-phase star-connected rotor. When the stator is supplied with rated voltage, slip ring being open circuit, the induced emf value is 65 Volts. The value of 0.6 ohm and 5.5 ohm are the resistance and stand still reactance of rotor per phase. Determine the following: 1. Rotor current per phase when the rotor is at stand still and connected to rheostat of 5.5 ohm (star-connected) and reactance 0.6 ohm per phase. 2. Rotor current per phase when motor is running at slip of 4% while rheostat is short circuited.
A 1500KVA, 11KV, 50Hz, Star connected synchronous generator is tested by operating it as a synchronous motor on no-load. The results are as follows: When operated as a synchronous motor on load the power input to the motor is 55.8KW and the armature line current is 70A. The excitation of 38.6A at 250V dc gives the normal open-circuit voltage. DC resistance test: dc line voltage 17.5V and dc line current 70A. Take the effective resistance as 1.6 times the dc resistance. Calculate the efficiency of the machine on 80% of the full-load and 0.75 power factor lagging
Q. A 3-phase, star connected, 10 kVA, 400 V, salient pole alternator with direct and quadrature axis reactances of 15 ohm and 8 ohm respectively, delivers full-load current at 0.8 power factor lagging.Neglect the armature resistance. Solve this question to chose the correct answer for the following: Alternator no load voltage
Given a 25 hp, three-phase, 230-volt, squirrel cage induction motor. The ambient temperature of the place ofinstallation is 40°C. Use TW wires
Q. A 3-phase, star connected, 10 kVA, 400 V, salient pole alternator with direct and quadrature axis reactances of 15 ohm and 8 ohm respectively, delivers full-load current at 0.8 power factor lagging.Neglect the armature resistance. Solve this question to chose the correct answer for the following: The load angle?
If the armature resistance of a 3-phase, 318.75 kVA, 2300-V synchronous generator is 0.35 ohms per phase, the synchronous reactance is It is 1.2 ohms. Calculate the excitation voltage and voltage regulation for the following load cases: a) Full load, back power factor of 0.8 and rated voltage. b) Full load, forward power factor of 0.6 and rated voltage.
A 25 HP, 6 pole, 50 Hz, 3-phase slip ring induction motor runs at 960revolutions per minute on full load with a rotor current per phase of 35 A.Allowing 250 W for the copper loss in the short-circuiting gear, and 1000Wfor mechanical losses, find the resistance per phase of the three-phaserotor winding.
A three-phase, 415V, 50Hz, six-pole, star-connected induction motor is driven from a variable voltage, variable frequency supply. The motor circuit phase parameters are as follows: R₁ = R' = 1.002, X₂=X₂ = 2.002, Xm=502 When running at full load on rated voltage and frequency, the motor takes a line current of 12A at 0.86 power factor lagging. Assuming that the motor is operating in the constant flux mode, determine the supply voltage and speed when delivering the same torque at 60Hz.