A positive-sequence, balanced ∆-connected source supplies a balanced a ∆-connected load. If the impedance per phase of the load is 18 + j12 Ω and ?? = 19.202∟35° ?, find ??? and ???.
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A positive-sequence, balanced ∆-connected source supplies a balanced a ∆-connected load. If the impedance per phase of the load is 18 + j12 Ω and ?? = 19.202∟35° ?, find ??? and ???.
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- Example: A balanced positive-sequence wye-connected 60 Hz three-phase source has line-to- line voltages of V,=1000 V. This source is connected to a balanced wye-connected load. Each phase of the load consists of a 0.2 H inductance in series with a 100 0 resistance. Find the line-to-neutral voltages, the line currents, the power, and the reactive power delivered to the load. Assume that the phase of Van is zero.For the circuit in the figure below, the reactance of each impendence is specified according to the frequency of the voltage source. Determine the Thevenin and Norton Equivalent circuits for the network and match a value to a specific description. X = 200 2 Xc = 120 n 100 sin wt v XLa = 300 n OB Norton's current (A) Choose... Thevenin's impedance (Ohms) Choose... If a load impedance of 20+j0 Ohms is connected at port AB, Choose... determine the effective current (A)flowing through the load. Thevenin's effective Voltage Choose... + (V) at port AB Choose... + The magnitude of impedance of the parallel combination of Choose... the two inductors (Ohms)Find the following: the power drawn by the 100ohm variable resistor If the variable resistor is set to 200-ohms, instead of 100-ohms, What is the power drawn by the 200-ohms resistor? total current of the system Is the circuit inductive, capacitive, or neither (resistive)? NOTE: Polar form for Voltage & Current. Rectangular form for Impedance
- Impedances Z2 and Z3 in parallel are supply. Z1 =6.25 + j 1.25 ohm; Z2 = 5 + j0 ohm and Z3 = 5 – jXc ohm. Determine the value of capacitance of Xc such that the total current of the circuit will be in phase with the total voltage. When is then the circuit current and power. series with impedance Z1 across a 100 V, 50 Hz acSuppose that a current source with Is amperes of current is connected in parallel to a pair of impedances Z₁ and Z2. Let I₁ be the current through Z₁ and 12 be the current through Z₂. Then, the total voltage Is is divided between 1₁ and 12 in proportion to impedance values Z₁ and Z2. a. True O b. FalseImpedances Z2 and Z3 in parallel are in series with impedance Z1 across a 100 V, 50 Hz ac supply. Z1 =6.25 + j1.25 ohm; Z2 = 5+ j0 ohm and Z3 = 5-jXc ohm. Determine the value of capacitance of Xc such that the total curent of the circuit will be in phase with the total voltage. When is then the circuit current and power.
- Electrical Engineering In a balanced Y-A connected system the source voltage (rms) is given as V 200/-20° V. Each phase of the load absorbs %3D complex power S a) phase voltage b) load impedance c) line current 6-j1 kVA. Find the %3DUnder balanced operating conditions, consider the 3-phase complex power delivered by the 3-phase source to the 3-phase load. Match the following expressions, those on the left to those on the right. 0) Real power, Py (ii) Reactive power, Qu (ii) Total apparent power Sy (iv) Complex power, Sy (a) (V3 VLL. IL)VA (b) (V3 Vu sng) var (e) (V3 VLL. IL cos ø) W (d) Py +Qy Note that VLL is the rms line-to-line voltage, IL is the ms line current, and o is the power-factor angle.= = Impedances Z₂ and z3 in parallel are in series with an impedance z₁ across a 100V,50Hz AC supply. Z₁ (6.25 +j1.25)ohms, Z₂ = (5 + j0)ohms and Z3 (5 - jxc)ohms. Determine the value of capacitance Xc said that the total current of the circuit will be in phase with the total voltage. What is then the circuit current and power?