Determine the complex power transmitted to the three-phase load of a four-wire Y-Y circuit like the one shown above in the figure. The phasor voltages of the Y-connected source are Va = 110 60 ° Vrms, Vb = 110 angle= - 120 ° Vrms, and Vc = 110 angle= 120 ° Vrms. The load impedances are ZA = ZB = ZC = (50 + 800j) ohms

Q: For a three-phase circuit following an "abc" sequence, which of the following statements about phase…

A: First we will draw phasor diagram with abc as phase sequence than we will select correct option from…

Q: Determine the line currents in the three-phase circuit of the figure given below, where Van = 450 /…

A: In this question we need to find the line current if the given three phase system

Q: For the balanced A-A circuit of the figure below, calculate the phase and line currents (lag and I).…

A: Given a circuit shown

Q: In a three-phase wye-connected source, the three phase currents are 12/15° A, 12Z- 105° A, and…

A: This question belongs to circuit theory . It is based on the concept of three phase circuit . It is…

Q: Problem 4: A three phase motor draws 30 kVA at 0.80 power factor lagging from a 480 V three phase…

A: The data are given as KVA ratingS1=30kVA,Power factorpf1=cosϕ1=0.8 laggingso, ϕ1=36.87°.1) Without…

Q: balanced load is connected in star across a 3 phasec415V 50Hz supply. The load consists of a coil of…

A:

Q: 2. A three phase delta connected balanced resistive load is connected to a three phase delta…

A: Given data: Vab=240∠00 VRab=120 Ω

Q: A load of 40 -j 30 is connected to a source of 100 V with a phase angle of 30°, through a…

A: Given data : Load impedance ZL=40-30j Source Voltage Vs=100∠30° inductive reactance XL=60Ω

Q: A star connected reflector supplies a delta connected load. The impedance of the load branch is (8 +…

A:

Q: rom the given circuit, take V₁ = 240, Z₁ = 20 - j3 ohms. Find the phase currents and line urrents.…

A: The given three phase system is balance. So we can analyse the circuit by per phase analysis.

Q: Calculate the line currents for phase a, b and c. 2. Calculate the line to neutral voltages at the…

A: Fig: Given citrcuit  (1) Although in the Y- connected system  Line current  =phase…

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.