INPUT DATA Recommended input power 300Watt Recommended PV modules 300w / Vmp > 34VDC / Voc < 5OVDC Maximum input DC voltage SOVDC Peak power tracking voltage 22-50VDC Operating voltage range 17-50VDC Min. / Max. Start voltage 22-50VDC Maximum DC short current 15A Maximum input current 9.8A
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- The diagram shown below is a typical tuning circuit. Considering this circuit comprises a transformer (with a coil ratio of 20:1 and an HV side voltage of 240V ), a capacitor of impedance -j20Ω, an inductor of impedance j40Ω, and a 50Ω resistor, determine: the current supplied by the source the impedance seen at the supply (HV side) the power dissipated by the resistor the operating power factor of the fitting If the capacitor is now removed from the above circuit and is placed in parallel with the secondary of the transformer, redraw the circuit diagram and recalculate parts a. to d. in question (i). Draw the phasor diagram for both series and parallel RLC circuits in parts (i) and (ii). Discuss the effects of changing the capacitor connection in parallel on the power factor of the circuit. State the benefits of using the transformer in the above circuit. Explain the operating principle of the transformer with particular reference to electro-magnetic…3) The results of an open circuit test and a short circuit test In a 450 kVA transformer, 42000/2400 V, 60 Hz are the following: Open circuit test (low voltage side) VCA = 2400 V ICA = 18,1 A PCA = 3785 in Short circuit test (High voltage side) Vcc = 1910 V Icc = 11,9 A PCC3850 W a) Find the equivalent circuit of the transformer referred to the bass side voltage. b) Calculate the efficiency of the transformer at full load with a factor of Power of 0.85 in delay.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).
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- Two interconnected substations O and P are interconnected via a distribution line of impedance6 + ?8Ω. Assume a load of 20MVA, at 0.8 power factor lagging is delivered at a bus-bar voltageof 66kV at P from O. Determine:a. the bus-bar voltage at substation Ob. the efficiency of distributionc. the power factor angle at OI want a solution in less than 30 minutes Often, the network is referred as an infinite bus when a change in input mechanical power or in field excitation to the unit does not cause an appreciable change in a. system frequency or terminal voltage b. Total production cost c. system frequency and terminal voltage d. system frequency aloneA 72VA, 60Hz single-phase transformer has the equivalent circuit shown. (a) What is the no-load current if excited on the 120V side?(b) Estimate the losses in the transformer at full load with power factor 1.0.(c) Estimate the input voltage required for full load if the output voltage is 36V-rms and the output currentlags the voltage by 25 degrees.(d) What is the voltage regulation?Ans:(b) 4.68W (c)V_p = 123 angle(0.65) V rms (d) 2.5% Show me how each answer was found
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