Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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 P3φ =3 VL I L cos φ = 3 × 440 × 40 cos 30o
= 26400 Watt = 26.4 kW
(c) Reactive power drawn by the load:
Q3φ = √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
Illustrate the conventional representations of the following guide to the selection of Fits: (i) Slack Running Fit (ii) Loose Running Fit (iii) Easy Running Fit (iv) No
Explain the suitability of aluminium that is used as electrical conducting materials. Aluminium : Conductors are appropriate for ambient and very high temperature. Use of alu
Q. Show Binary to Octal Conversion? It is simple to convert from an integer binary number to octal. This is accomplished by: Break the binary number into 3-bit secti
what is strain gauge
what is frequency response plot?
A 13.8 kV feed er circui t breaker has a 600:5 multira tio curr ent transform er with charact eristics as show n in Figure 5.11. Th e max - imum load on the feed er is 80 A pri mar
Suppose we have a coil wound onto a ring of material with relative permeability µ r . Provided that the relative permeability µ r >> 1, then the magnetic flux lines will s
Q. Explain Power-System Loads? Figure represents a one-line (single-line) diagram of a part of a typical three-phase power system. Notice the symbols that are used for generato
For the RC phase-shift oscillator if c=1pF and R=10K determine the value of Rf
why is a delay line used in the vertical selection of oscilloscope?
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd