B) For Two coils if L, for series aiding 600 mH, Ly for series opposing 400 ml and L,- 250 mH Find the value of L, coupling Mutual (M) and coupling coefficient.
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- 6.5% ans ex A so kvA. 2o00/20 V, So He single-phase transformar has impedance drof of8% and resistance drop of 4%. Caleulate. The Requlation of the Thams former at full- Load o8 P.s Legging. also find The Power factor at which Voltage requlation will Be Zero. Sols 0.5 leading. s alculate The % Noltege Requlation af atransformar in w hich the Percantage resistance drof is 1% and Percentage dre is 6% when The Power fador is 0.8 lagging ) > unity aMS 38 % ans 1 % (シ→ 0.8 leading . amS - 2.2%A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuitA parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuit.
- 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?J62 For the magnetically coupled circuit shown, find K J72 the values of coupling coe fficient "k" when the power at 100 resistance is equal to (40W) if Vs=5020°v. (Ans.: 0.279) Vs 4.672Two impedances consist of resistance of (15 ohms and series connectedinductance of 0.04 henry) and (resistance of 10 ohms, inductance of 0.1 henryand a capacitance of 100 microfarad, all in series) are connected in series andare connected to 230 volts, 50 – Hz AC source. Find: (a) current drawn, (b) voltageacross each impedance, (c) individual and total power factor. Draw the phasordiagram.
- Power engineering book MehtaJ62 Q.3: For the magnetically coupled circuit shown, find the values of coupling coefficient power at 10Q resistance is equal to (40W) if Vs-50Z0°v. (Ans.: 0.279) K J752 "k" when the Vs 52 102 4.6752Q2/3-phase.E.W.C. R using center tap transformer supplies highly inductive load, find: 1. The average load voltage with and without FWD and discusses these cases. 2-lf firing angle equal to 45°, the supply voltage is240v, transformer ratio is (2/1). Calculate the DC current& voltage of this case. 3- Draw all waveforms diagram. 4- what are the difference between the type of connection (Delta or Star).
- - A 150 KVA, 0.4/250 kV testing transformer has 10% leakage reactance and 4% resistance on 150 kVA base. A cable has to be tested for 500 kV using this transformer at a resonant frequency of 50 Hz. If the charging current of the cable at 500 kV is 0.4 A. Assuming 1.5% resistance for the inductor to be used and the connecting leads and neglecting dielectric loss of the cable, calculate: 1.2.1 The series inductance required 1.2.2 The input voltage of the transformer and power (kW).I need the answer at 20 minuteSolve it fast plz