A single phase motor operating off a 400V, 50Hz supply is developing 10KW with an efficiency of 84% and a power factor (p.f) of 0.7 lagging. Calculate; The input apparent power; The active and reactive components of the current; 3.The reactive power (in kilovars).
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Q#4
A single phase motor operating off a 400V, 50Hz supply is developing 10KW with an efficiency of 84% and a power factor (p.f) of 0.7 lagging. Calculate;
- The input apparent power;
- The active and reactive components of the current;
3.The reactive power (in kilovars).
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- 2) The net inlet to a factory powered by a 2300 volt infinite busis measured as 765 A, for a lag 0.92 power factor. although mostloads is inductive, the input power factor has been improved by installing asynchronous capacitor operating at its nominal value of 1000 KVA. Determine the factor oforiginal factory power.: A single phase motor operating off a 400V, 50Hz supply is developing 10KW with an efficiency of 84% and a power factor (p.f) of 0.7 lagging. Calculate; The input apparent power; The active and reactive components of the current; The reactive power (in kilovars).A three-phase 500-hp, 60-Hz , 4.16kv Y-connected induction motor has a full-load efficiency of 88%, 0.75 power factor, and is connected to a feeder. If it is desired to correct the power factor of the load to a lagging power factor of 0.9 by connecting three capacitors at the load, determine the following:a) The rating of the capacitor bank in KVarb) The capacitance in μF of each unit if it is connected in deltac) The capacitance in μF of each unit if it is connected in wye.
- Electromechanical energy conversion (One AC induction motor and one AC synchronous motor were operated connected to an infinite bus of 600V. Power factor of the induction motor is 0,7 (lagging) and consumes 400 W from the bus. Synchronous motor consumes 300 W from the bus. If the power factor of the synchronous motor is 0,9 (lagging) find the line current from the bus, for the total of two motors (IL total 1) of the line that connects the motors with the bus and find the total appearent power (SL total 1) of the motors consumed from the bus. When the induction motor has the same conditions, if the power factor of the synchronous motor is 0,9 (leading) find the line current from the bus, for the total of two motors (IL total 2) of the line that connects the motors with the bus and find the total appearent power (SL total 2) of the motors consumed from the bus.Q#4: A single phase motor operating off a 400V, 50Hz supply is developing 10KW with an efficiency of 84% and a power factor (p.f) of 0.7 lagging. Calculate; i) The input apparent power; ii) The active and reactive components of the current; iii) The reactive power (in kilovars).A 230V, 50Hz, single phase motor takes a current of 4A and has a PF of 0.6 lagging. A capacitor in connected in parallel with the motor and takes a current of 3.8A. Calculate the value of new supply current and its power factor. A- Active current component is= B- Reactive current component is C- Reactive current component with capacitor is D- new current= E- new power factor =
- An industrial plant consisting primarily of induction motor loads absorbs 500 kW at 0.6 power factor lagging. (a) Compute the required kVA rating of a shunt capacitor to improve the power factor to 0.9 lagging. (b) Calculate the resulting power factor if a synchronous motor rated at 375 kW with 90% efficiency operating at rated load and at unity power factor is added to the plant instead of the capacitor. Assume constant voltage.A 100KVA, 220V, a star-connected alternator is loaded at full load and at 60% pf lagging.The effective AC resistance per phase is 0.01411Ω. If the synchronous reactance is 4.5times the effect of the armature leakage reactance wherein the later is 0.046 Ω perphase, find(a) the phase voltage that would be generated at the load if the circuit were operating normally(b) What no-load open-circuit phase voltage must be present in order to circulate full-load current in short-circuit state while maintaining the same speed and field current?(c) What is the terminal phase voltage of the alternator when it is under a shorted load condition? Give an explanation in support of your response using just one sentence. The IA phasor should be used as the reference one.A 1200kVA, 6600V, 3phase, Y-connected alternator has an effective resistance of 0.4Ω and a reactance 0f 6Ω per phase. It delivers full load current at 0.8 lagging power factor at rated voltage. What will be the terminal voltage for the same excitation and load current, if the power factor is 0.8 leading? Use two decimal places.
- A single-phase motor is connected as shown inFigure to a 50-Hz network. The capacitor valueis chosen to obtain unity power factor. If V = 220 V,I = 20 A, and I1 = 25 A, find the capacitor valueA balance 3-phase, 220V, abc source initially has a load which is a 3-phase induction motor rated 60 Hp, 0.85 efficiency, 0.8 p.f. lagging. If it is desired to improve the power factor of the system from 0.8 to 0.95 pf lagging by adding a 3-phase synchronous motor that will operate at 0.85 pf leading. What is the KW input of the synchronous motor needed to do this?A 4400V, 3-ph, Y- connected synchronous motor has an effective resistance and synchronous reactance of 3Ω and 19Ω per phase respectively. If the open–circuit generated emf is 4800V between lines, calculate The current .........amper *P.F at Maximum mechanical powerTotal Cu losses.........watt *Input power to motor