Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta co... Start Learning for Free
A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​?
Most Upvoted Answer
A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor i...
Given:

Power input at no load (Pnl) = 660 kW

Power input at full load (Pfl) = 11.20 kW

Line current at no load (Inl) = 8 A

Line current at full load (Ifl) = 18 A

Stator effective resistance (Rs) = 1.2 ohm

Friction and winding loss (W) = 420 W

Number of poles (p) = 4

Frequency (f) = 50 Hz

Phase voltage (Vp) = 400/√3 = 230.94 V

(i) Stator core loss:

At no load, the stator copper loss is negligible. Therefore, the input power at no load is equal to the stator core loss.

Pnl = Pcore = 660 kW

(ii) Slip at full load:

At full load, the input power can be calculated as:

Pfl = 3VpIflcos(θ)

where cos(θ) is the power factor. Assuming a power factor of 0.8, we get:

Pfl = 3 x 230.94 x 18 x 0.8 = 11.20 kW

The output power can be calculated as:

Pout = Pfl - W = 11.20 - 0.42 = 10.78 kW

The slip can be calculated as:

s = (Pin - Pout)/Pin

where Pin is the input power at full load. Substituting the values, we get:

s = (11.20 - 10.78)/11.20 = 0.037

(iii) Total rotor ohmic losses at full load:

Since the rotor ohmic losses are negligible at no load, we can assume that they are negligible at full load as well. Therefore, the total rotor losses at full load are zero.

(iv) Full load speed:

The synchronous speed can be calculated as:

Ns = 120f/p = 1500 rpm

The actual speed at full load can be calculated as:

N = (1 - s)Ns

Substituting the values, we get:

N = (1 - 0.037) x 1500 = 1448 rpm
Explore Courses for Electrical Engineering (EE) exam

Similar Electrical Engineering (EE) Doubts

Top Courses for Electrical Engineering (EE)

A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​?
Question Description
A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​?.
Solutions for A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? defined & explained in the simplest way possible. Besides giving the explanation of A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​?, a detailed solution for A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? has been provided alongside types of A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? theory, EduRev gives you an ample number of questions to practice A 10kw, 400V, 3-phase, 4-pole, 50 HZ delta connected induction motor is running at no lode with a line current of 8A and an input power is 660 kW. At full load, the line current is 18 A and the input power is 11.20 kW. Stator effective resistance per phase is 1.2 ohm and friction, winding loss is 420 watts. For negligible rotor ohmic losses at no load, calculate (i) stator core loss (ii) slip at full load (iii) total rotor ohmic losses at full load (iv) full load speed.​? tests, examples and also practice Electrical Engineering (EE) tests.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev