Determine phase - voltage and power, Electrical Engineering

Assignment Help:

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


Related Discussions:- Determine phase - voltage and power

Define the x-nor or exclusive-nor gate, Define the X-NOR or Exclusive-NOR G...

Define the X-NOR or Exclusive-NOR Gate?   This is the EX-OR gate with the output inverted, as shown by the 'o' on the output and the output Q is true if inputs A and B a

Gas hazards in the laboratory, GAS HAZARDS IN THE LABORATORY : As mentione...

GAS HAZARDS IN THE LABORATORY : As mentioned in the introduction of this unit, the gas hazards in a laboratory arise from LPG and other compressed gases. Though the use of gas for

Static or electronic energy meters, Static or Electronic Energy Meters ...

Static or Electronic Energy Meters Electronic energy meters are replacing traditional electromechanical meters in several residential, commercial and industrial applications s

Wireless cellular systems, i want help in builiding a simulator of cellular...

i want help in builiding a simulator of cellular systems under different frequency reuse scenarios?

Description of the program counter and the data pointer, Questions: a) ...

Questions: a) Give a brief description of the program counter and the data pointer, including their differences. b) Briefly describe what are Byte-Level logical operations

What is the photon flux - focal spot isotropically, Suppose that the x rays...

Suppose that the x rays are emitted from a focal spot isotropically. The photon flux is 3.28 x 10 6 photons mm -2 sec -1 at a distance of 0.75 m from the focal spot. What is the

Khalid, i need to rewrite 24 pages of engineering research.

i need to rewrite 24 pages of engineering research.

How can a jfet be used as a constant current source, Q. How can a JFET be u...

Q. How can a JFET be used as a constant current source? Explain from the drain characteristics. As the VDS voltage is increased from 0 to a few volts, the current will increase

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd