400V 50Hz system connected to a full controlled rectifier through a delta to star transformer. The rectifier operated at 45 degree and the constant load current is 15A calculates power factor also calculate the rectifier efficiency.
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A three phase full controlled converter with 20 ohm for a firing angle of 45 degree. if the load power is 10kW, here inductive load is connected with resistance in series and the load current becomes constant. At this condition calculates the source phase voltage
5 Three inductive coils each of inductance 45mH are connected in star to a 3 phase 400V, 50 Hz supply. Calculate the inductance of each coil, which when connected in delta to take the same supply voltage and line current, also find the power delivered at unity power factor for both star and delta connected load. (6 Marks)
A three phase full controlled converter with 20 ohm for a firing angle of 45 degree. if the load power is 10kW, calculates the source phase voltage Please solve this qstn
A Single-phase halfwave controlled rectifier is used for a heating system whose rated power is 15kW at 220V. The SCR is connected to a 220 VAC system. 1. Determine the rated equivalent resistance of the heater2. Determine the maximum that the rectifier can provide to the heater3. When the SCR is fired at angle of p/3, determinea. Waveform of the voltages across the load, the SCRb. Waveform of the currents flow through the SCR, drawn by the load and supplied...
A three-phase 400V, star-connected motor has an output of 50kW, with an efficiency of 90 per cent and a power factor of 0.85. Calculate the line current. Sketch a phasor diagram showing the voltages and the currents. If the motor windings were connected in mesh (delta), What would be the correct voltage of a three-phase supply suitable for the motor?
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency 89% and power factor 0.85 lagging. Calculate: A) The total KVA rating of capacitor required to rise full load power factor to 0.95 lagging. B) What is capacitance per phase if capacitor: 1) Delta connected. 2) Star connected.
In this part of the term paper, design a single-phase switch-mode DC power supply with a forward converter. Provide answers to the questions below Please combine the single-phase full-wave rectifier from part two of your term paper with a forward converter to produce a switch-mode DC power supply, as shown below. The output of the bridge rectifier serves as input to the forward converter L1 Np: N BH621BH62 D, V1 Load C1 100p 45 Vrms D3 BH62 18H62 D4 Control...
A 3-j semi-controlled bridge rectifier is fed from a delta-star transformer 66 kVA, 60 Hz, 13800 V/? (the secondary voltage is unknown). The load of the rectifier is highly inductive. The following measurements at a specified firing angle have been recorded: Ith RMS 70.71 A I line RMS (transformer secondary) 76.40 A Draw the complete circuit diagram and calculate; i. Load current Io. ii. Firing angle α. iii. Transformer secondary line voltage (RMS). iiii. Average output voltage (at the calculated...
A 3-j semi-controlled bridge rectifier is fed from a delta-star transformer 66 kVA, 60 Hz, 13800 V/? (the secondary voltage is unknown). The load of the rectifier is highly inductive. The following measurements at a specified firing angle have been recorded: Ith RMS 70.71 A I line RMS (transformer secondary) 76.40 A Draw the complete circuit diagram and calculate; i. Load current Io. ii. Firing angle α. iii. Transformer secondary line voltage (RMS). iiii. Average output voltage (at the calculated...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...