38 views
in Basic electrical and electronics engineering by
A balanced Delta connected load supplied with 440 V 50 Hz three phase AC supply has R=10 Ohm and L=0.6 mH in is each arm. Calculate line and phase current, active power.

Related questions

0 answers 15 views

A balanced three phase star connected load is supplied from a three phase 400V 50 Hz supply. The resistance for per phase is 10 Ohm. Find the value of phase current, line current, power factor and total power consumed.

asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 103 views

A balanced three phase Delta connected load consists of three resistances each of four ohm's connected to a 400 V 3 phase 50 Hz supply. Find 1) phase voltage, 2) phase current, 3) line current, 4) power consumed.

asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 45 views

For a balanced three phase star connected load for which line voltage is 230V and per phase resistance and reactance is 6 Ohm and 8 Ohm respectively. Calculate: 1) phase voltage 2) line current 3) power factor 4) total power absorbed

asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
1 answer 223 views

Total instantaneous power supplied by a 3-phase ac supply to a balanced R-L load is

asked Apr 28, 2018 in Electrical Engineering by Shimroz123
1 answer 16 views

The line current in a balanced delta system is 30 A. The load current is (A) 30√3 A (B) 30/√3 A (C) 10 A (D) 30/√2 A

asked Apr 28, 2018 in Network Analysis by Shimroz123
0 answers 28 views

Draw the Delta connected three phase system showing all the voltages and currents. Write the power equation.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
1 answer 4 views

Define balanced and unbalanced load in three phase circuit.

asked Sep 6, 2018 by Shimroz123
1 answer 86 views

Explain Three Phase Bidirectional Delta Connected Controller.

asked Mar 7, 2018 in Unit 6 by Quiz
0 answers 24 views

A single phase 230 V/ 150 V , 1 kVA, 50 Hz transformer is supplied by 230 V AC supply. Find the full load primary and secondary current. 

asked Sep 1, 2018 by Quiz
1 answer 32 views

A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 38 views

In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load, the input source current is (A) sinusoidal current (B) constant dc current (C) continuous rectangular pulses (D) alternating rectangular pulses

asked Apr 28, 2018 in Power Electronics by Shimroz123
1 answer 23 views

The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are 8 kW and 4 kW. The power factor of the load is (A) zero (B) 0.5 (C) between zero and 0.5 (D) between 0.5 and unity

asked Apr 28, 2018 in Network Analysis by Shimroz123
0 answers 13 views

An R-L series AC circuit has R = 10 ohm and XL = 10 ohm. It is connected to an AC voltage source, the phase angle between voltage and current is (a) 30° (b) 45° (c) 60° (d) 36.8°

asked May 25, 2018 in Network Analysis by Shimroz123
1 answer 14 views

A solar cell of 350 V is feeding power to an ac supply of 440 V, 50 Hz through a 3-phase fully controlled bridge converter. A large inductance is connected in the dc circuit to maintain the dc current at 20 A. If the solar cell resistance is 0.5 Ohm ,then each thyristor will be reverse biased for a period of  (A) 125o (B) 120o (C) 60o (D) 55o

asked May 18, 2018 in Power electronics converters by Shimroz123
1 answer 283 views

The sequence components of current of a single-phase load connected to a 3-phase system are (A) equal positive and negative sequence components (B) equal positive, negative and zero sequence components (C) vector sum of sequence currents is zero (D) algebraic sum of sequence currents is zero

asked Apr 28, 2018 in Power system by Shimroz123
1 answer 7 views

Define balanced 3 phase load.

asked Sep 7, 2018 by Zeeshan
1 answer 21 views

At a particular instant, the R-phase voltage of a balanced 3-phase system is + 30 V, and the Y-phase voltage is – 90 V. The voltage of B-phase at that instant is (A) + 120 V (B) – 120 V (C) – 60 V (D) + 60 V

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 27 views

A 12 -pole, 440 V, 50 Hz, 3 -phase synchronous motor takes a line current of 100 A at 0.8 pf leading. Neglecting losses, the torque developed will be

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 4 views

Define each of following terms: i) Connected load ii) Spinning reserve. 

asked Sep 7, 2018 by Shimroz123
0 answers 19 views

A delta connected 400 V, 50 Hz, 3-phase induction motor when started direct-on-line takes a starting current of 30 A. When the motor is started through a star-delta starts, the starting current will be (1) 3A (2) 10 A (3) 15 A (4) 30 A 

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
1 answer 18 views

A three-phase, 440 V, 50 Hz ac mains fed thyristor bridge is feeding a 440 V dc, 15 kW, 1500 rpm separately excited dc motor with a ripple free continuous current in the dc link under all operating conditions, Neglecting the losses, the power factor of the ac mains at half the rated speed is  (A) 0.354 (B) 0.372 (C) 0.90 (D) 0.955

asked May 18, 2018 in Power electronics converters by Shimroz123
0 answers 17 views

A three phase 50 Hz, 400 kV transmission line is 300 km long. The line inductance is 0.97 mH/km per phase and capacitance is 0.0115 mF/km per phase. Assume a loss less line. Determine the line wavelength (a line phase constant).  (A) 1250 km (B) 6578 km (C) 4990 km (D) 2445 km 

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
2 answers 95 views

The sending end and receiving end voltages of a three-phase transmission line are 10 kV/ph and 9.5 kV/ph, respectively. If the resistance drop is 150 V/ph and receiving end power factor is 0.8, the sending end power factor is (A) 0.745 lagging (B) 0.775 lagging (C) 0.8 lagging (D) 0.85 lagging

asked Apr 28, 2018 in Power system by Shimroz123
1 answer 33 views

A 400 V, 50 Hz 30 hp, three-phase induction motor is drawing 50 A current at 0.8 power factor lagging. The stator and rotor copper losses are 1.5 kW and 900 W respectively. The friction and windage losses are 1050 W and the core losses are 1200 W. The air-gap power of the motor will be (A) 23.06 kW (B) 24.11 kW (C) 25.01 kW (D) 26.21 kW

asked May 17, 2018 in Electrical Machine by Shimroz123
0 answers 49 views
1 answer 15 views

If a 220/440 V, 50 Hz, 5 KVA, single-phase transformer operates on 220V, 40Hz supply with secondary winding open circuited: (A) both the eddy current and the hysteresis losses will decrease (B) both the eddy current and the hysteresis losses will increase (C) eddy current losses will remain the same but the hysteresis losses will increase (D) eddy current losses will increase but the hysteresis losses will remain the same

asked Apr 11, 2018 in Computer Engineering by Shimroz123
0 answers 82 views

Three single phase transformers each with 10 kVA rating are connected in a closed delta arrangement. If one transformer is taken out, the output capacity of the system will be (a) 20 kVA (b) 8.66 kVA (c) 17.32 kVA (d) 10 kVA

asked May 25, 2018 in Single phase transformer by Shimroz123
1 answer 20 views

A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W. What is the reactive power consumed by the system if 2.5 A rms current is drawn ?  (a) 100 VAR (b) 200 VAR (c) 300 VAR (d) 400 VAR

asked Apr 23, 2018 in Electrical Engineering by Zeeshan
0 answers 54 views

A 1-phase, 7.46 kW motor is supplied from a 400 V, 50 Hz A.C mains. Its efficiency is 85% and power factor is 0.8 lagging. Calculate the KVA input (1) 9.56 kVA (2) 5.4 Kva (3) 10.97 kVA (4) 8.6 kVA 

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
1 answer 18 views

Three equal impedances are first connected in delta across a 3 -phase balanced supply. If the same impedances are connected in star across the same supply then,

asked Apr 23, 2018 in Electrical Engineering by Zeeshan
1 answer 80 views

Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
2 answers 76 views

 With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals?

asked Mar 25, 2018 in Basic concepts by Shimroz123
1 answer 22 views

The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be :  (A) 34.64 kVA (B) 75 kVA (C) 20 kVA (D) None of the above

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 41 views

Define the terms: i) Tariff ii) Fuel surcharge iii) Electricity Duty iv) Connected load

asked Sep 29, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 132 views

Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax 

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 17 views

A 35 V dc supply is connected across a resistance of 600 ohm in series with an unknown resistance R. A voltmeter having a resistance of 1.2 kOhm is connected across 600 ohm resistances and reads 5 V. The value of resistance R shall be:

asked May 22, 2018 in Electrical Engineering by Shimroz123
1 answer 20 views

A coil of inductance 240 mH and resistance 75 Ohm is connected in parallel with a capacitor across a 30 V, variable frequency supply. The current drawn by the circuit is found to be minimum when the supply frequency is 1 kHz. The approximate values of Q-factor and bandwidth are, respectively (A) 40, 400 Hz (B) 10, 100 Hz (C) 20, 50 Hz (D) 50, 20 Hz

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 50 views

What is line voltage and phase voltage? Draw balanced three phase star connected system. Show all the voltages and currents.

asked Aug 11, 2018 in Basic electrical and electronics engineering by Quiz
0 answers 15 views
3 answers 270 views
1 answer 18 views

A 3-phase fully controlled bridge converter with free wheeling diode is fed from 400 V, 50 Hz AC source and is operating at a firing angle of 60o. The load current is assumed constant at 10 A due to high load inductance. The input displacement factor (IDF) and the input power factor (IPF) of the converter will be  (A) IDF IPF = = 0.867; 0.828 (B) IDF IPF = = 0.867; 0.552 (C) IDF IPF = = 0.5; 0.478 (D) IDF IPF = = 0.5; 0.318 

asked May 18, 2018 in Power electronics converters by Shimroz123
1 answer 21 views

What should be kVA rating of each transformer in V-V bank when three phase balanced load is 40 kVA ? (A) 19 (B) 28 (C) 37 (D) 23

asked May 13, 2018 in Electrical Engineering by Shimroz123
0 answers 19 views

A three phase transmission line delivers a load of 5 MW at 0.8 power factor lagging. Resistance of each conductor is 0.5 ohm / km. Receiving end voltage is 33 kV. If the line loss is not to exceed 10%, determine the length of the line.  (A) 7 km (B) 27.9 km (C) 56.8 km (D) 13.9 km

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
1 answer 137 views

A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance perphase of the capacitor in micro-farads is?

asked Mar 27, 2018 in Power system by Shimroz123
1 answer 5 views

As shown in the figure, 1 ohm resistance is connected across a source that has a load line v + i = 100. The current through the resistance is A) 25 A B) 50 A C) 100 A D) 200A

asked May 20, 2018 in Network Analysis by Shimroz123
1 answer 27 views

A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω  

asked Jun 18, 2018 in Diode by Shimroz123
0 answers 19 views

The power input to the rotor of a 400V, 50 Hz 6 pole three phase induction motor is 20kW. The slip is 3%. The frequency of rotor currents is: (A) 1 Hz (B) 1.5 Hz (C) 2 Hz (D) 1 2 Hz

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 24 views

In a balanced 3 -phase 200 V circuit, the line current is 115.5 A. When the power is measured by two wattmeter method, one of the wattmeters reads 20 kW and the other one reads zero. What is the power factor of the load ?

asked Apr 23, 2018 in Electrical Engineering by Zeeshan
1 answer 10 views

A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows: A - B = 3m, B - C = 5m, C - A = 3.6m If the line operates at 132 k V, the reactive voltampere generatd by the line per km is?

asked Mar 27, 2018 in Power system by Shimroz123

Welcome to electronics2electrical.com here you can ask questions related to electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc.
Be respectful to all the members. Do not copy and paste the answers from other websites which have copyright content. While asking question give full details about it.

Categories

Most popular tags

power motor dc circuit transformer voltage current used system phase resistance factor synchronous load ac energy induction electric generator series frequency between speed capacitor use electrical meter line difference control type mosfet transmission magnetic plant high single instrument bjt unit source advantages function diode and machine winding field define torque parallel amplifier supply shunt thyristor motors electricity arduino maximum time relay armature problem value on transformers types coil diagram state flow ratio material three formula starting direction theorem method emf operating efficiency digital wave microprocessor test instruments inductance loss measure operation connected signal low applications effect single-phase network temperature working constant losses different law wattmeter measuring compare controlled breaker drive device logic rc full switch flux wire resistivity disadvantages free of materials machines angle force converter conductor transistor gain open protection scr core measurement number bridge principle generators reactance circuits negative the friction iron loop short pole battery conservation steam resistors hysteresis computer using analog lines secondary station gate a rectifier inverter linear induced relays nuclear capacitance basic characteristics design direct work rotor electronics ammeter forces diesel damping rlc connection factors capacitors minimum insulation moving regulation running self systems air fault range main stability quality starter igbt eddy alternator ideal rl average 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors copper rotation feedback impedance measured electronic electrons charge inductive transfer explain start off back curve over solar is three-phase tariff locomotive peak bias zener engineering commutator surge conductors rating universal potentiometer density permanent mechanical transducer capacity memory adc excitation two fuse pure harmonics application semiconductor inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic si generation brushes switching capacitive shaded rate 1 distribution resistor methods delta star oscillator reluctance simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units

8,450 questions

7,047 answers

132 comments

3,084 users

...