Determine phase - voltage and power, Electrical Engineering

Determine phase - voltage and power:

A balanced star connected load is supplied from a symmetrical 3-phase 440 Volt system. The current in each of the phase is 40 Amp and lags 30o behind the phase voltage. Determine

1.      phase voltage,

2.      power,

3.      reactive power drawn by a the load, and

4.      phase impedance.

Solution

For three phase star connected load voltage applied VL = 440 Volt

(a)                  V ph    = 440/ √3 = 254.03 Volt

Power current = I ph = 40 ∠ - 30o Amp = I L

 (b)       Power P =3 VL I L cos φ   = 3 × 440 × 40 cos 30o

                                                            = 26400 Watt = 26.4 kW

(c)        Reactive power drawn by the load:

Q= √3 VL I L sin φ

= √3 × 440 × 40 sin 30o

= 15242.047 Var = 15.24 kVAr

 (e)       Phase impedance Z ph = V ph I ph

               =254.03 ∠ 0o / 40 ∠- 30o = 6.35 ∠ 30o Ω

Posted Date: 2/5/2013 2:14:02 AM | Location : United States







Related Discussions:- Determine phase - voltage and power, Assignment Help, Ask Question on Determine phase - voltage and power, Get Answer, Expert's Help, Determine phase - voltage and power Discussions

Write discussion on Determine phase - voltage and power
Your posts are moderated
Related Questions
Write an m-file "distan.m"  which does all the following operations: (i) computes 10 dimensional histogram of an input image             h1=sum(hist(imn,10)'); (ii) computes

In real life, transformers have losses which cause their behaviour to deviate from the ideal. Explain the reasons for this non-ideal behaviour

explain the properties and the application of high resistivity materials related with tunsten and carbon?


Write a program to count how many from your data set called MYDATA, which is a set of signed single-byte numbers, has positive value and are odd numbers. Save the result in POSOD

File Flops The flip flop is a one storage biteable   device. The basic  bistable device stores a binary  of inputs  value. the flip flops  are categorized according  to the nu

Q. Let a(t) = [1 + m A x(t)] and x(t) = cos 2πf m t, f m c , and x c (t) = A(t) cos 2πfct . (a) With m A =1, sketch one full period of the AM wave and draw the envelope by co

Q. A three-phase load, connected to a 440-V bus, draws 120 kWat a power factor of 0.85 lagging. In parallel with this load is a three-phase capacitor bank that is rated 50 kVAR . D

Q. For the coupled inductors shown in Figure, neglecting the coil resistances, write the volt-ampere relations.

Q. Interpretation and analysis using remote sensing? Interpretation and analysis using remote sensing Various characteristics of a river can be understood by studying its planf