Three phase systems star and delta connections?

Three identical coils each of resistance 50ohms and inductance of 254.6(mH)

Are connected to a 415v at a frequency 50Hz

1) Star 2)Delta

Calculate:

Line and phase voltages

Line and phase currents

For both configurations

Thank you for any help

Will rate and give points

2 Answers

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  • Anonymous
    7 years ago
    Best Answer

    for star connection;

    E(line)= Squ.root(3) x E(phase)

    where,

    E=voltage

    E(line)=Squ.ro ot(3) x415

    E(line)=718.8v

    for phase current

    I(line)=I(phase)

    I=V/(R+Xl) -------------(1)

    inductive reactence = 2x pi x f x L = 2 x 3.141 x 50 x 254.6m = 79.96 ohm

    put in eq1 then we get

    I=(415)/(50+79.96) = 3.193Amp

    For Delta Connection ;

    E(line) = E(phase)

    E(line) = E(phase)= 415V

    I(line)= Squ.root(3) x I(phase)

    where we have calculated I = 3.193Amp

    I(line)= Squ.ro ot(3) x 3.193 = 5.53 amp

  • sparsh
    Lv 4
    3 years ago

    3 section vast call device is used the place the skill a lot on all ranges are no longer balanced so there's a independent twine which contains the unbalanced modern. 3 section delta device is used for balanced 3 section a lot which includes a three section electric powered motor.

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