(a) Given the network below, form an equivalent circuit for the transformer and primary, and use the resultant network to find Vo.
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- The rms value of v(t)=Vmaxcos(t+) is given by a. Vmax b. Vmax/2 c. 2Vmax d. 2VmaxAn ideal transformer has no real or reactive power loss. (a) True (b) FalseAn ideal transformer has 500 turns on the primary and 300 turns on the secondary. The source produces a voltage of 600V (RMS) and load Z is a pure resistance of 122. Calculate: (i) E2 (ii) Il & 12 (iii) Power delivered to the primary (W) (iv) Power output from secondary (W) 2. (v) what is the impedance seen by the source?
- A transformer is needed that will cause an appear as 240 Vyms. actual load resista nce of 252 to 100R to an ac voltage source of ca) Dyews the diaggaam of the cuf. reguired. cb) what tuons ratio is required for the tounsforma. C) Find the currenttauen from the source the cuorent flowing through the load, and the load voltope load voltage-One side of a transformer has What is the voltage (in V rms) at the secondary? 1,800 turns while the other side has 450 turns. The high voltage side is connected to a 240 Vrms source. The low What is the current (in A rms) at the secondary? What is the current (in A rms) out of the source? What is the value of the load impedance when referred to the primary? • Referred impedance = voltage side (secondary) is connected to an impedance ZL = 20 + j10 Q. Provide at least 4 digits after the decimal point. +j_ N What is the value of the source voltage (in V rms) when referred to the secondary?Given Zo-j407 2, R₁143, R6317 52 and a 0.04, what is the magnitude of the source voltage Vs (in V rms) in the primary of the ideal transformer? Vs R₁ ww Answer: Zc Zc R₁ Use up to 2 digits after the decimal point if necessary in your answer below VL-28020 V TR
- A 100 kVA, 400 V/250 kV testing transformer has 8% leakage reactance and 2% resistance on 100 kVA base. A cable has to be tested at 500 kV using the above transformer as a resonant transformer at 50 Hz. If the charging current of the cable at 500 kV is 0.4 A, find the series inductance required. Assume 2% resistance for the inductor to be used and the connecting leads. Neglect dielectric loss of the cable. What will be the input voltage to the transformer?A star connected load with real impedance ZL= 1-j1 Ohm per phase is connected to the secondary of a three-phase Ynyn0 connected transformer. The equivalent impedance per reduced phase of the transformer to the primary is Zeq1= 1+j5 Ohm. The nominal primary voltage is V1Ln= 5920 V and the conversion ratio is a= 10. what is the amplitude of the actual voltage falling on one phase of the specified load? (simplified equivalent circuit will be used).VASSESSMENT PROBLEM Objective 4-Be able to analyze circuits containing linear transformers using phasor methods A linear transformer couples a load consisting of a 360 2 resistor in series with a 0.25 H inductor to a sinusoidal voltage source, as shown. The voltage source has an internal impedance of 184 + j0 N and a maximum volt- age of 245.20 V, and it is operating at 800 rad/s. The transformer parameters are R1 = 100 2, = 0.5 H, R2 = 40 1, L2 k = 0.4. Calculate (a) the reflected impedance; (b) the primary current; and (c) the secondary current. 9.14 R1 R2 juM jas Ia Source b Transformer d Load = 0.125 H, and
- The approximated equivalent circuit referred to the primary of a loaded single phase transformer is shown below. Reap jX ea p S - 10Z-36.87° A 0.20 Q j0.80 2 + o RC aVs jXM V p 10020° V RC 3j100 N 300 Q a) The 1300 VA, 100/200 rated transformer is fully loaded as shown at 0.8 power factor lagging. It is required to find the efficiency of the transformer at the above conditions. b) What would be the maximum efficiency of the transformer when the load power factor is kept the same as in a) and when Pcore = 33.33 W.Q2: A 1OKVA distribution transformer has a full.load e fficiency at 0-85 p.f of 95/ the ca ppes and van losses then being equal. Caleulote its all- day efficiency through out the 24 hours if it is loaded as follows Neload Quarter lod lo hours 5 hours 子 howe 2 heurs load Pf .f 0.9 half load full load AssumsTwo impedances Z1 and Z2 are connected in series with the primary and secondary winding of an ideal transformer as shown in the figure below, where the primary coil has jó N and secondary coil has 9 O reactance. The mutual inductance if w = 1000 rad/sec is, mH. 1 C0000