Three single phase loads are connected to the 400 V, three phase lines, 60 Hz. Load 1 operating at 3 kVA, 0.8 power factor lagging and is connected at line "a" and "b", Load 2 is a 5 kW heater and is connected at line "b" and "c", Load 3 is 4.5 kW machine that operates at a power factor of 0.6 lagging and is connected at lines "c" and "a". a. What are the line currents Ia, Ib, and Ic in Amperes (in Polar form) b. What is the total real power in  W. c. Total Reactive Power.

Q: The shunt branches of are neglected to draw the reactance diagram. Static Loads Transformer O…

A: The explanation is as follows.

Q: 4.A generating station has the following daily load cycle : Time (Hours) 0-6 6-10 10-12 12-16 Load…

A: In the generating system,  Daily load curve data are given Find the maximum demand Energy per day…

Q: Three 100kVA 34.5kV primary 12/6.9kV secondary. Connect the transformers delta-wye. What is the…

A: Given: A transformer with Three 100kVA 34.5kV primary 12/6.9kV secondary. Primary is delta…

Q: 2 A 1000 kVA 11 kV/400 V ONAF cooled transformer works on a cycle of 3 hours heavy load and 21 hours…

A: Given that the peak load is 140% and can only be maintained for 0.5 hours per hour of time constant,…

Q: sformer 1200 KVA, 11000/2200 V, 50 Hz e reactance/phase of the primary winding ar ding values for…

A:

Q: Discuss the advantage and disadvantage of each connection. Generator reactor Tie-bar…

A: The advantage and disadvantage is given below of the following : Generator reactor: Disadvantage:…

Q: What is the difference between single-phase and three-phase alternating current? Select one: A.…

A: Single-phase supply consists of the two power legs - Phase and Neutral  Three-phase supply consist…

Q: Two power system areas operating at a nominal frequency of 60 Hz are connected with a tie line, and…

A: Step-1->

Q: Q2/A/ The 2MW load operating with 0.8 lagging power factor. To improve the power factor to 0.95 a…

A:

Q: There are two loads connected in parallel and powered from a 7200-V source. The first load is 50-kVA…

A:

Q: In class B chopper, which of the given statement is true The value of On time is always less than…

A: The formula for output voltage in step up chopper is, Vo = Vin/(1- delta)-----(1) Delta is the duty…

Q: An alternating current completes 5 cycles in 8 ms. What is its frequency?

A: Number of cycles = 5 Time = 8ms

Q: A generating station has the following daily load cycle :Time (Hours) 0-66-10 10-12 12–16 16-20…

A: In this question we will solve daily load curve .

Q: Three synchronous generator are connected in parallel to a an infinite s. G1 only provides active…

A:

Q: The current lo of figure shown below ww-

A: Apply KCL at Principal node we can easily find Io

Q: Two power system areas operating at a nominal frequency of 60 Hz are connected with a tie line, and…

A:

Q: The reactance of a generator is given as 0.25 pu based on the generator of 13 KV, 200 MVA. Determine…

A: Given, Reactance, Xg(old)= 0.25 pu Voltage, kV(old)= 13 kV Apparent power, MVA (old)= 200 MVA Base…

Q: The incremental cost characteristics of t generators delivering 200 MW are as follows: dF2 dP ah =…

A:

Q: In class B chopper, which of the given statement is true The value of On time is always less than…

A: Class B chopper is basically equivalent to step up chopper The circuit diagram of class B chopper…

Q: Design a short circuit shunt stub that will match a 50 ohm line into a 100 + j100 ohm load.

A: We need to design a short circuit stub that with match a 50 ohm line into a 100+j100 ohm load.

Q: Manufacturers usually specify the impedances of machines and transformers in O Percent O Per-unit O…

A: Need to Find correct option

Q: Single Phase and Three Phase Principles

A: As per Bartleby guidelines we are allowed to solve only one question, please ask the rest again.

Q: Q2/ Find Yous for the power system all reactance on a common base. Bus 3 j0.25 j0.10 j0.25 Bus 2…

A: Impedances of the network branches on a common base  are given. Z12=j 0.125 puZ13=j 0.125 puZ14=j0.…

Q: Two power system areas operating at a nominal frequency of 60 Hz are connected with a tie line, and…

A: Given:Nominal frequency=60 Hz;Area 1: R1=0.02 pu and D1=1 pu on a base of 1200 MVA;Area 2: R2=0.03…

Q: If a double-line ground fault occurs at node 5, calculate the currents in the generator. Use VBase =…

A:

Q: A star connected Alternator excitation voltage and terminal voltages per phase respectively are 180V…

A: Alternator: It is used to convert the mechanical energy to electrical power in the form of…

Q: Can you explain regarding shunt reactor and shunt capacitor?

A: Shunt Inductive reactor  Inductive reactor absorbs lagging VAR and supplies leading VAR. The…

Q: In a series AC resistive circuit: O a) voltage leads current by 90°(degrees). b) current leads…

A: Option c Current and voltage are in phase

Q: The actual impedance of a load is 30 OHM. The per-unit impedance of the load is 0.5 pu when Base…

A: In this answer let us try to find the base power used in order to get the given per unit impedance…

Q: 7. Three load units A, B, and Care connected in parallel and take currents that are respectively 11…

A:

Q: 72. In 132 kV system, the phase to ground ca- pacitance is 0.01 µF and inductance is 6H. The voltage…

A:

Q: Two power system areas operating at a nominal frequency of 60 Hz are connected with a tie line, and…

A:

Q: How to measure the B phase voltage in three phase star connected system? a. Between B phase and R…

A: Phase voltage is the voltage between any line wire and neutral wire, so here the phase voltage of B…

Q: A workshop from a 231/400 V transformer center with a 3-phase and four-conductor underground cable…

A: Transformer: It is a static device, which converts the electrical power from one circuit to another…

Q: 7. Two 440V, 60Hz, 6 pole, 30 AC generators are running in parallel. The first supplies the busbars…

A: It refers to the connection of multiple generators in a way to supply a common load. This…

Q: 2. A ciruut condrest of resiutance Rohm and an inductanceL henmy connected to a qgenerator of the…

A: Given, Resistance of the circuit is R and inductance is L. Voltage of the generator is

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.