Homework Answers
Let four motors be M1, M2, M3 & M4 with M1 be 15kW, M2 be 8 kW, M3 be 5kW & M4 be 12kW.
G be supply generator.
We connect G in series with four motors in parallel to each other.
I:0 is normally open switch so when I:0 is ON the solenoid gets energised and M1 runs. I:1 is normally open switch so when I:0 is ON the solenoid gets energised and M2 runs. I:2 is normally open switch so when I:0 is ON the solenoid gets energised and M3 runs. I:3 is normally open switch so when I:0 is ON the solenoid gets energised and M4 runs. So, if we want to run more than one motoer we can make thoses switches ON and to stop the motor we have to again open the switches.
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30 a PLC ladder circuit or controlling the supply of 4-motors from a controlling kW generator...
poin A D.C. generator is to supply a load of A 367 KW at 300 V....
poin A D.C. generator is to supply a load of A 367 KW at 300 V. If you know that the Power Developed in the armature is 372 Kw and the core and mechanical losses is 2 KW, how much is the electrical losses? O 3 KW O 70 KW O 5 KW O 2 KW points For the magnetic circuit shown in the Figure: The flux in the core is 0.03 wb and the current is 3 A. If...
LAB TEST 1 (set 1) PMENT REQUIRED 2 Power Supply 3. Function Generator PROCEDURE 1. Connect a circuit as shown in Figur...
LAB TEST 1 (set 1) PMENT REQUIRED 2 Power Supply 3. Function Generator PROCEDURE 1. Connect a circuit as shown in Figure 1 2. Measure the output voltage at Ri. Ra for the given frequency range oscilloscope. Ri 1.6 kW 10 Vpp, 5 kHz 100 nF R 24 KW Figure 1 RESULTS Vpp Vpo at R Freq (kHz) Vou (Vop at Ra) 10 10 03.5t 20 10 30 10 10 50 10 60 70 10 80 10 100 10 ....
Please answer question 4 with the graph and info given below the problem statement. Thank you : ) 4. Assume that the generator field current is adjusted to supply 480 V under rated condi- tions. Wha...
Please answer question 4 with the graph and info given below the
problem statement. Thank you : )
4. Assume that the generator field current is adjusted to supply 480 V under rated condi- tions. What is the static stability limit of this generator? (Note: You may ignore RA to make this calculation easier.) How close is the full-load condition of this generator to the static stability limit? Problems 2 to 4 refer to a four-pole, Y-connected synchronous generator rated...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 +J1.6) Ω per phase between generator G1 and the load, and (0.8 +jl ) Ω per phase between generator G2 and the load. If generator Gl supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line- to-line, determine 1. The voltage at the load terminals. 2. The voltage...
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and...
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and 1800 rpm. Its field circuit has a total resistance Radi +Rp. Its magnetizing curve is shown in Fig. P4.1. The machine has the following characteristics: RA = 0.05 2; Rr = 20 2; Radi (a) Draw the schematic diagram of the generator. (b) If the variable resistor Radi in this generator's field circuit is adjusted to 63 2 and the generator's =0 to 300...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de supply The ac generator is connected to a 460 V, fixed-voltage, fixed-frequency, three-phase supply. The synchronous reactance of the synchronous generator is 513 Ω/phase. The armature resistance of the de motor is 30 m2. The 4-pole de machine is rated 30 kW at 230 V. All unspecified losses are to be...
An AC generator provides power for the circuit shown below. The generator voltage is described by...
An AC generator provides power for the circuit shown below. The generator voltage is described by E(t)=Emaxsin(ωt)E(t)=Emaxsin(ωt) where E=E= 120 V. Here, L=L= 640 mH, C=C= 160 μμF, R=R= 90 ΩΩ, and ω=ω= 40 rad/sec. 1) What is the phase angle between the generator and the current? ϕ=ϕ= -55 degrees ϕ=ϕ= 1.1 degrees ϕ=ϕ= 64 degrees ϕ=ϕ= -16 degrees ϕ=ϕ= -0.99 degrees Your submissions: A Submitted: Wednesday, July 29 at 1:02 PM Feedback: Feedback will be available after 11:59 PM...
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4. Synchronous generator DC test, open circuit test and short circuit test are done to a 240V, 60Hz, Wye-connected, 12-pole synchronous generator. The test results are shown below: DC test: Line-to-line voltage: 15V Line current: 45A OC test: Field current (W): 5A Line-to-line voltage: 240V SC test: Field current (l): 5A Line current: 68.514A Per-phase Reactance Xs: 22 a. Determine the per-phase model resistance R for the synchronous generator and draw the 3- phase model of this generator labeled with...
Develop a PLC ladder logic for motor lockout to prevent a machine operator from starting a motor that has tripped off more than 5 times in an hour. The sequence of operation is given below. Please us...
Develop a PLC ladder logic for motor lockout to prevent a machine operator from starting a motor that has tripped off more than 5 times in an hour. The sequence of operation is given below. Please use the same names (or addresses) for input/outputs as given below. Assume the PLC tick time is 10ms 18j List of Inputs and Outputs: Sequence of Operations: Inputs: 00: Start (Momentary push button) The normally open overload (OL)-retay 01 : Stop (Momentary push button)...
The magnetization curve for a separately excited de generator is shown in Figure P8-7. The generator...
The magnetization curve for a separately excited de generator is shown in Figure P8-7. The generator is rated at 6 kW, 120 V, 50 A, and 1800 r/min and is shown in Figure P8-8. Its field circuit is rated at 5A. The following data are known about the machine: R, -0.189 1,-120 V R-0400 R - 200 N, -1000 tums per pole Answer the following questions about this generator, assuming no armature reaction. (a) If this generator is operating at...
poin A D.C. generator is to supply a load of A 367 KW at 300 V. If you know that the Power Developed in the armature is 372 Kw and the core and mechanical losses is 2 KW, how much is the electrical losses? O 3 KW O 70 KW O 5 KW O 2 KW points For the magnetic circuit shown in the Figure: The flux in the core is 0.03 wb and the current is 3 A. If...
LAB TEST 1 (set 1) PMENT REQUIRED 2 Power Supply 3. Function Generator PROCEDURE 1. Connect a circuit as shown in Figure 1 2. Measure the output voltage at Ri. Ra for the given frequency range oscilloscope. Ri 1.6 kW 10 Vpp, 5 kHz 100 nF R 24 KW Figure 1 RESULTS Vpp Vpo at R Freq (kHz) Vou (Vop at Ra) 10 10 03.5t 20 10 30 10 10 50 10 60 70 10 80 10 100 10 ....
Please answer question 4 with the graph and info given below the
problem statement. Thank you : )
4. Assume that the generator field current is adjusted to supply 480 V under rated condi- tions. What is the static stability limit of this generator? (Note: You may ignore RA to make this calculation easier.) How close is the full-load condition of this generator to the static stability limit? Problems 2 to 4 refer to a four-pole, Y-connected synchronous generator rated...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 +J1.6) Ω per phase between generator G1 and the load, and (0.8 +jl ) Ω per phase between generator G2 and the load. If generator Gl supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line- to-line, determine 1. The voltage at the load terminals. 2. The voltage...
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and 1800 rpm. Its field circuit has a total resistance Radi +Rp. Its magnetizing curve is shown in Fig. P4.1. The machine has the following characteristics: RA = 0.05 2; Rr = 20 2; Radi (a) Draw the schematic diagram of the generator. (b) If the variable resistor Radi in this generator's field circuit is adjusted to 63 2 and the generator's =0 to 300...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de supply The ac generator is connected to a 460 V, fixed-voltage, fixed-frequency, three-phase supply. The synchronous reactance of the synchronous generator is 513 Ω/phase. The armature resistance of the de motor is 30 m2. The 4-pole de machine is rated 30 kW at 230 V. All unspecified losses are to be...
4. Synchronous generator DC test, open circuit test and short circuit test are done to a 240V, 60Hz, Wye-connected, 12-pole synchronous generator. The test results are shown below: DC test: Line-to-line voltage: 15V Line current: 45A OC test: Field current (W): 5A Line-to-line voltage: 240V SC test: Field current (l): 5A Line current: 68.514A Per-phase Reactance Xs: 22 a. Determine the per-phase model resistance R for the synchronous generator and draw the 3- phase model of this generator labeled with...
Develop a PLC ladder logic for motor lockout to prevent a machine operator from starting a motor that has tripped off more than 5 times in an hour. The sequence of operation is given below. Please use the same names (or addresses) for input/outputs as given below. Assume the PLC tick time is 10ms 18j List of Inputs and Outputs: Sequence of Operations: Inputs: 00: Start (Momentary push button) The normally open overload (OL)-retay 01 : Stop (Momentary push button)...
The magnetization curve for a separately excited de generator is shown in Figure P8-7. The generator is rated at 6 kW, 120 V, 50 A, and 1800 r/min and is shown in Figure P8-8. Its field circuit is rated at 5A. The following data are known about the machine: R, -0.189 1,-120 V R-0400 R - 200 N, -1000 tums per pole Answer the following questions about this generator, assuming no armature reaction. (a) If this generator is operating at...
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