Homework #9 freddy raz

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM:What is the smallest number of poles that can be used in two synchronous machines if it is desired to convert from 60 to 50 cycles and at what speed will the set operate?

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM:A two-anode mercury-arc rectifier delivers a load of 5.98kw at 115volts.  If the primary of the transformer is connected to a 4,600-volt source, the tube drop is 15volts, and a rectangular waveshape is assumed for the anode current, calculate: (d) the kilovolt-ampere rating of the transformer primary;(e) the kilovolt-ampere rating of the transformer secondary.

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM:A three-anode mercury-arc rectifier supplies a 250-kw 230-volt load and is energized from a 4,600-volt three-phase source through a three-phase transformer whose primaries are in delta. Assuming an arc drop of 20-volts, calculate:(a) the d-c load current;(b) the voltage and kilovolt-ampere rating of each transformer secondary;(c) the current and kilovolt-ampere rating of the three-phase transformer.

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM: A 1,000-kw three-phase converter delivers full load at 600volts. If the efficiency is 94percent and the power factor is 0.96, determine:(a) the direct-current output(b) the a-c slip-ring current(c) the kilovolt-ampere load delivered by each transformer.

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM:The three transformers that feed & three-phase converter is connected in Δ on the primary side and Y on the secondary side. If the slip-ring current is 471.5amp, calculate:(a) the current in each transformer primary coil if the ratio of transformation is 21.7:1;(b) the line current on the primary side of the transformers.

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM: A three-phase converter has a d-c rating of 120kw and 600volts. Assuming an efficiency of 94 percent and a power factor of 0.95, calculate:(A) the direct-current output(B) the slip-ring voltage and the slip-ring current(C) Also determine the kilovolt-ampere load on each of the transformers.

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM:A two-anode mercury-arc rectifier delivers a load of 5.98kw at 115volts.  If the primary of the transformer is connected to a 4,600-volt source, the tube drop is 15volts, and a rectangular waveshape is assumed for the anode current, calculate:(a) the anode current;(b) the voltage rating of each of the transformer secondary windings;(c) the primary current, neglecting the exciting current;

DEGREE: Electrical Engineering SUBJECT/COURSE: AC CircuitsTOPIC: Converter and Rectifier NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. REQUIRED/FIND/MISSING (with symbol/s)4. ILLUSTRATION (Required).5. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible6. FINAL ANSWERS must be rounded up to three decimal places PROBLEM:The three transformers that feed & three-phase converter is connected in Δ on the primary side and Y on the secondary side. If the slip-ring current is 471.5amp, calculate:(NO NEED TO SOLVE THIS-SOLVE THE PROBLEM BELOW) the current in each transformer primary coil if the ratio of transformation is 21.7:1;(NO NEED TO SOLVE THIS-SOLVE THE PROBLEM BELOW) the line current on the primary side of the transformers. PLEASE SOLVE THIS: If the slip-ring voltage in the problem above is 367 volts, calculate:(a) the d-c…

GIVE ME THE Numerical value not the formula.. WHATS THE ANSWER IN OHMS ?? Give answer as a Number NOT EQUATION 

DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: INDUSTRIAL ELECTRONICSTOPIC: TRANSFORMERS NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. ILLUSTRATION (Required).4. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, no skipping, and detailed as possible5. FINAL ANSWERS must be rounded up to two decimal places with corresponding unit. PROBLEM:An 80:5 current transformer is connected to a 5-amp ammeter. if the latter reads 3.65 amp, what is the line current?

DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: INDUSTRIAL ELECTRONICSTOPIC: TRANSFORMERS NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. ILLUSTRATION (Required).4. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, no skipping, and detailed as possible5. FINAL ANSWERS must be rounded up to two decimal places with corresponding unit. PROBLEM:Connect the three 1-Φ transformers in bank:Primary winding in WYE and secondary windings in DELTA.

DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: INDUSTRIAL ELECTRONICSTOPIC: TRANSFORMERS NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. ILLUSTRATION (Required).4. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, no skipping, and detailed as possible5. FINAL ANSWERS must be rounded up to two decimal places with corresponding unit. PROBLEM:A 50:1 potential transformer is connected to a 150-volt voltmeter for the measurement of the high-side voltage of a distribution transformer. If the voltmeter deflection is 133, what is the transmission line voltage?

DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: INDUSTRIAL ELECTRONICSTOPIC: TRANSFORMERS NOTE: Please solve in this way. 1. Please have a good handwriting, some of the answers are not readable. Thank you!2. GIVEN. (Include symbols and units)3. ILLUSTRATION (Required).4. Step-by-step SOLUTION with Formulas and Symbols. No Shortcut, no skipping, and detailed as possible5. FINAL ANSWERS must be rounded up to two decimal places with corresponding unit. PROBLEM:The polarity test is performed upon a transformer. If the input voltage is Vin and the voltmeter readings are 121.8 volts (additive) and 110.2 volts (subtractive). Calculate the turns ration.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • An abc-phase sequence three-phase balanced wye-connected source supplies a balanced delta-connected load. The impedance per phase of the delta load is 10+j8 Ω. If the line impedance is zero and the line current in a phase is known to be la=28.10<-28.66° Arms, find the load voltage Vab.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A 300V(line) 3-phase supply feeds a star-connected load consisting of non-inductive resistors of 15, 6 and 10Ω connected to the R, Y and B lines, respectively. The phase sequence is RYB. Calculate the voltage across each resistor.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A Y-connected load is supplied from a 400V, 3 -phase, 3-wire symmetrical system RYB. The branch circuit impedances are ZR=10V3+j10; Zy=20+j20v3 ZB=0-j10 Determine the current in each branch. Phase sequence is RYB.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • Calculate the total power when three identical resistances each of 10Ω are connected wye when connected across 220V, 3-phase, 60Hz source.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • Three inductive loads, each of resistance 4Ω and reactance 9Ω are connected in delta. When connected to a 3-phase supply the loads consume 1.2kW. Calculate: (a) the power factor ofthe load, (b)the phase current and the line current, and  (c) the supply voltage.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A 3-phase, 4-wire, 380V supply is connected to an unbalanced load having phase impedances of ZR=(8+j6)Ω, Zr=(8-j6)Ω and ZB=5 Ω. Impedance of the neutral wire is ZN=(0.5+j1)Ω. Ignoring the impedances ofline wires and internal impedances of the emf sources, find the phase currents and voltages of the load.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A star-connected load consists of three identical coils, each of inductance 159.2mH and resistance 50Ω. If the supply frequency is 50Hz and the line current is 3A determine: (a) the phase voltage and (b) the line voltage.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A 440V, 3-phase ac motor has a power output of 11.25kW and operates at a power factor of 0.8 lagging and with an efficiency of 84%. If the motor is delta connected determine: (a) the power input, (b) the line current and (c) the phase current

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • In a balanced three-phase delta-delta system, the source has an abc-phase sequence. The phase angle for the source voltage is <Vab=40° and lab=4<15°Arms . If the total power absorbed by the load is 1400W, find the load impedance.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • Three non-inductive resistances of 5,10 and 15Ω are connected in star and supplied from a 230V symmetrical 3-phase system. Calculate the line currents (magnitudes).

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • In a balanced three-phase wye-delta system, the source has an abc-phase sequence and Van=120<40° Vrms. The line and load impedance are 0.5+j0.4 Ω and 24+j18 Ω, respectively. Find the delta currents in the load.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A delta-connected load whose phase impedances are ZAB=50 Ω, ZBc=-j50 Ω, and ZcA=j50Ω is fed by a balanced wye-connected three phase source with Vp=100 V. Find the phase currents.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A positive-sequence balanced three-phase wye-connected source with a phase voltage of 120 V supplies power to balanced wye-connected load. The per phase load impedance is 40+j10Ω. Determine the line currents in the circuit if <Van=0°.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • The phase b line voltage and phase a line current of a balanced three phase system are V = 220sin(wt+210°)V and I＝10sin(wt-30°)A respectively. What is the power of the system?

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • An abc-phase sequence three-phase balanced wye-connected source supplies power to a balanced delta-connected load. The impedance per phase in the load is 14+j12 Ω. If the source voltage for a phase is Van=120<80° Vms, and the line impedance is zero, find the phase currents in the wye-connected source.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • A 3 phase, 4-wire, 400V symmetrical system supplies a Y-connected load having the following branch impedances: ZR=100 Ω, Zy=j10Ω and ZB=j10Ω Compute the values of load phase voltages and currents and neutral current. Phase sequence is RYB. How will these values change in the event of an open in the neutral wire?

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • In a three-phase balanced delta-delta system, the source has an abc-phase sequence. The line and load impedances are 0.3+j0.2 Ω and 9+j6 Ω, respectively. If the load current in the delta is IAB=15<40°Ams, find the phase voltages of the source.

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places

DEGREE: ELECTRICAL ENGINEERING  SUBJECT/COURSE: AC CIRCUITS   NOTE: Please solve in this way.    1. Please have a good handwriting, some of the answers are not readable. Thank you! 2. GIVEN.(include symbols and units) 3. REQUIRED/FIND/MISSING (with symbol/s) 4. ILLUSTRATION (Required). 5. STEP-by-STEP SOLUTION with Formulas and Symbols. No Shortcut, No skipping, and detailed as possible 6. FINAL ANSWERS must be rounded up to three decimal places   PROBLEM: • The magnitude of the complex power (apparentpower) supplied by a three-phase balanced wye-wye system is 3600VA. The line voltage is 208Vrms. If the line impedance is negligible and the power factor angle of the load is 25°, determine the load impedance.