Answer to Question #223618 in Electrical Engineering for TAPION

Question #223618

In an unbalanced, three-phase, star-delta system has a frequency of 50 Hz, and CBA phase rotation.The phase impedances

of the load are as follows:

Zab =29.41∠ 54.69°Ω ; Zbc=25.61∠-38.66° Ω ; Zca =17.8 ∠ 51.84° Ω

The emf of the source is represented by:ec(t)=221.831 𝐬𝐢𝐧 (𝛚𝐭 +(𝟓𝝅/𝟏𝟖) ) V

Calculate the phase current,( Iab, Ibc & Ica) of the load in polar form.

Calculate the active power( Pab, Pbc , Pca) in phase AB of the load in phasor form.

Determine the line current,( Ia, Ib & Ic) in polar form.

If two wattmeters are connected in lines a and b respectively of the above circuit to

measure the active power,

Determine the reading of the wattmeter,(Wa) connected in line a.

Determine the reading of the wattmeter,(Wb) connected in line b.

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