205k views
3 votes
A balanced delta-connected load having impedance 20-j15 Ω per phase is connected to a delta-connected negative sequence generator having Vab = 330∠0 Vrms. Calculate all the phase currents of the load, all the phase voltages of the load, and all the line currents, and all the line voltages How much power is delivered to the load?

1 Answer

3 votes

Final answer:

To calculate the phase currents, phase voltages, line currents, and power delivered to a delta-connected RLC load, we use Ohm's law and Kirchhoff's Current Law, and account for phase displacements in a balanced three-phase system.

Step-by-step explanation:

The task involves calculating various electrical parameters for a balanced delta-connected three-phase circuit containing an RLC load. To solve for the phase currents of the load, we apply Ohm's law (V=IZ) to each phase, using the respective phase voltage and impedance. Since the load is balanced, the magnitudes of the phase currents are equal, and the currents have a phase displacement of 120 degrees from each other.

To find the phase voltages of the load, we note that in a delta connection, the phase voltages are equal to the line voltages. The line currents can be determined by applying Kirchhoff's Current Law (KCL) at the junction points of the delta configuration, taking into account the phase displacement among the phases.

The power delivered to the load can be calculated using the formula P = 3 x Vphase x Iphase x cos(\u03C6), where \u03C6 is the power factor angle and Vphase, and Iphase represent the phase voltage and current magnitudes, respectively.

User Insumity
by
7.6k points