User Account

All Pages

What is the input line current delta winding current

Assignment Help Electrical Engineering
Reference no: EM13857103

1.)Three identical 1 phase transformers, each rated 500 kva, 4160 - 277 V and60 Hz, connected delta-wye to form 3 phase bank.
Short circuit test measurements taken on HV side of 1 phase transformer

(i.e. LV terminals of 1 phase transformer short circuited together):

Vsc = 250 V, Isc = 120.2 A, Psc = 10 kW.

(a) What is voltage regulation of 3 phase bank if it delivers rated current at rated voltage and 0.9 lagging power factor?

(b) What is the input line current, delta winding current, and wye winding current ifthe load is shorted?

2.)Three identical 1 phase transformers, each rated 25 kva, 34500-277 V and 60 Hz, connected delta-wye to form 3 phase bank.

Open circuit test measurements taken on LV side of 3 phase bank

(i.e. HV terminals of 3 phase transformer open circuited):

Vsc = 480 V (line to line), Ioc = 4.11 A (line current), Psc = 945 W (total 3 phase).

Short circuit test measurements taken on HV side of 3 phase bank

(i.e. LV terminals of 3 phase transformer short circuited together):

Vsc = 2010 V (line to line), Isc = 1.26 A (line current), Psc = 912 W (total 3 phase ).

(a) Find per unit approximate per phase equivalent circuit of 3 phase bank.

(b) Find voltage regulation of 3 phase bank at rated conditions and 0.8 lagging power factor.

(c) What is efficiency of 3 phase bank under conditions of part (b)?

3) 480 volt, 3 phase load of 100 kW (total) at 0.8 lag pf supplied from ideal 2300volt 3 phase source with ideal step-down transformers.

Determine needed kva, voltage, andcurrent ratings of every single phase transformer winding (both primary and secondary) ifthey connected (a) V-V (open delta) and (b) T-T.

Reference no: EM13857103

Questions Cloud

Explain about biomolecule and carbohydrates : Explain about Biomolecule, Carbohydrates, Lipids, Nucleic Acids and Proteins
At what point do the cons of deception outweigh the pros : Why do you think deception is used in research (IN YOUR OWN WORDS)? At what point do the cons of deception outweigh the pros
Define gross profit : Gross profit
Write an essay on gender sexuality and family values : Write an essay on Gender, Sexuality, and Family Values. Think about how all of these have become intertwined in the United States.
What is the input line current delta winding current : hat is voltage regulation of 3 phase bank if it delivers rated current at rated voltage and 0.9 lagging power factor? (b) What is the input line current, delta winding current, and wye winding current ifthe load is shorted?
What will happen to levels of atp in the affected heart cell : Explain why your heart would continue to beat despite being bitten by a blue ringed octopus - what will happen to the pH of the affected heart cells and what will happen to levels of ATP in the affected heart cells?
Write-off method would be used for tax purposes for a coal : Which write-off method would be used for tax purposes for a coal mine?
Is the system a time-invariant system : For a system as follows: , repeat the same operations and answer the following questions: a) is the system a linear system. is the system a time-invariant system. Delta function and sampling
Differential media for the isolation of specific prokaryotes : Describe how- why each step is needed. For example, how do the chemical properties of the media select for or differentiate the growth of V. cholerae.

Reviews

Write a Review

Electrical Engineering Questions & Answers

  What will be the appropriate values of quantizing level l

A binary channel with capacity 36 k bits/sec is available for PCM voic transmission. If signal is band limited to 3.2 kHz, then what will be the appropriate values of quantizing level L and the sampling frequency.

  What ip address must be used to fetch the instruction

If the phisical memory location is 6521H ad the code segment is 1400H what IP address must be used to fetch the instruction

  Calculate the phase impedance of the transformer in per unit

A 50-KVA, 13,800/208 V ?-Y distribution transformer has an equivalent phase impedance 114.2+j800 ohm referred to the high voltage side. Take the rated voltage as the base voltage and the rated VA as the based voltampere value.

  Calculate the bandwidth and center frequency of amplifier

1. An amplifier has cutoff frequencies of 120.0 Hz and 1.200 kHz. Calculate the bandwidth and center frequency of the amplifier. 2. The upper cutoff frequency of an amplifier is 8.000 MHz and its center frequency is 1 MHz.

  Develop the vhdl text file for a binary down-counter

Develop the VHDL text file for a binary down-counter to divide a frequency by 32. Use Q as the outputs and CLK as the falling edge clock input.

  What relation should 2-parameters satisfy to maintain output

A repeater has an input signal of 150μW and an output signal-noise ratio of 20 dB. The repeater has a gain of A and additional noise of N. What relation should the two parameters satisfy to maintain an output noise figure less than 2 dB

  Compute and output the 10s complement of the new number

A sequential circuit receives decimal numbers encoded in BCD one digit (4 bits) at a time, starting with the least significant digit. The circuit outputs are the 10's complement of the input number, also encoded in BCD least significant digit firs..

  What is the probability that the traffic light is red

Suppose you toss coins three times. Let X be the event that first of the three coin tosses results in "heads." Let Y be the event that you observe total of 2 "heads." Are X and Y independent events

  Calculate effective masses for conduction and valence bands

Draw energy band diagrams, for k lying between 0 and pi/a (take a=5Ã), for a material whose valence band follows the equation. and calculate the effective masses for conduction and valence bands.

  What value of capacitor needs to be connected in series

Assume that a load Z absorbs power of 150W at a lagging power factor of 0.8, and the voltage across the load Z is 220Vrms, 50 Hz. What must be the value of capacitor that needs to be connected in parallel with the load Z

  Calculate amount of work done if all losses are neglected

A container with a plunger compresses one pound mole of an ideal gas from 1 atmospheres pressure to 10 atmospheres. Calculate the amount of work done if the process is considered to be polytropic.

  Write a program for input temperatures for consecutive days

The program will store these values into an array and call a function that will return the average of the temperatures. It will also call a function that will return the highest temperature and a function that will return the lowest temperature.

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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