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EEE145 Q3 1) Given the 3-phase circuit on the board, draw the connections for the CT...
A three-phase transmission line operating at 345kV, 500 MVA, has a three phase CT and a three phase VT connected to it. The VT and CT are connected(Y/Y). The CT ratio is 1200:5 and the VT ratio is 3000:1. Draw the schematic diagram and Determine the CT li
A three-phase transmission line operating at 345kV, 500 MVA, has a three phase CT and a three phase VT connected to it. The VT and CT are connected(Y/Y). The CT ratio is 1200:5 and the VT ratio is 3000:1. Draw the schematic diagram and Determine the CT line and phase secondary currents and VT line and phase secondary voltages
Please answer this question Q3. The power rating and the voltage ratio of the power transformer...
Please answer this question
Q3. The power rating and the voltage ratio of the power transformer and the CT ratio are show in Fig 3. Determine the transformation turns ratios and the connection of the interposing transformers required in order to set the differential relays, which are provided with taps. Draw the complete three- phase connection schematic diagram and identify the currents in each of the elements. 150/ 5Y 115 Transformer Vector group: Primary secondary: Yd5 Primary.tertiary YO 1151V2SMVA13V SMVA...
2. Consider the given 3-phase circuit. Assume the load voltage, PAB = 30L30, Kms (3) Are...
2. Consider the given 3-phase circuit. Assume the load voltage, PAB = 30L30, Kms (3) Are the loads connected in Wye or Delta configuration? Explain your selection. b. a. (3) Are the sources connected in Wye or Delta configuration? Explain your selection. (5) Draw the single-phase equivalent of the given circuit. Label the line-to-neutral voltage numerically. c. d. (4) Calculate the rms line current phasor in each phase. e. (5) Calculate the rms source voltage phasor in each phase. f...
4. Consider a stepper motor with two phases. Phase 1 is wound with two identical coils. Phase 2 i...
4. Consider a stepper motor with two phases. Phase 1 is wound with two identical coils. Phase 2 is also wound with two identical coils. Therefore, there are eight wires that come out from the stator winding, four for each phase (a) Connect the phase terminal wires in such a way that the motor can be used as a unipolar wound motor and draw:a schematics for the amplifier circuit of the motor windings (b) Connect the phase terminal wires in...
Data of busbar 1 to busbar 4 are given in Table 1. Relay Maximum Fault Current...
Data of busbar 1 to busbar 4 are given in Table 1. Relay Maximum Fault Current Transformer Primary & Secondary R1 1000 Amp 100/5 Amp R2 2000 Amp 200/5 Amp R3 4000 Amp 400/5 Amp Calculate the Relay Operating Time (ROT) of all relays. Relay R3 is having two setting of ROT.
Prelab 1. In your lab notebook draw the schematic diagram for a three-phase wye-connected induction motor...
Prelab 1. In your lab notebook draw the schematic diagram for a three-phase wye-connected induction motor with its three-phase stator winding connected to the three-phase power supply through 25-Ω resistors. Connect two er analyzers in the circuit (between the 25-Ω resistors and the motor) to read the total power absorbed by the induction motor. What is the function of the resistors inserted in the circuit? 2. After reading this lab handout, draw the circuit diagram for the induction motor-synchronous generator...
What is the answer for questions 2-5? Questions: 1. Delta-Wye and Wye-Delta configurations both produce: a)...
What is the answer for questions 2-5?
Questions: 1. Delta-Wye and Wye-Delta configurations both produce: a) Increases in secondary voltages and currents. b) Decreases in the secondary voltages and currents. c) Phase shift between the incoming and outgoing line voltages. d) Additional V3 increases in the secondary voltages and currents. ANSWER: Choose an item. 2. The line voltage at the secondary of a 10:1 wye-delta connected transformer will be: a) Equal to the line voltage at the primary times b)...
select one Best match 11) A 12 kV radial system is given below, Assuming using relay...
select one Best match
11) A 12 kV radial system is given below, Assuming using relay CO-7, 3 cycles breaker operation time and 0.5 second coordination time delay, what are the best settings to protect the system shown below: (10 points) 12 kV Typical time curves ype Co-7 C.T.R-400/5 C.T.R-200/5 Current tap settings: 4.5,6,78,10,12 amperes 4 MVA Isc-1.6 kA 4 MVA Isc-1.2 kA Time dial TS1 TDS1 TS2 TDS2 A) 51/252 B) 41/24 C) 51/25 D) 41/24 2 4 5...
A three-phase electrical heater dissipates 50kW when connected to a 4160V, 3-phase line. (a) Draw the...
A three-phase electrical heater dissipates 50kW when connected to a 4160V, 3-phase line. (a) Draw the circuit diagram and indicate system parameters (line to line voltage, currents, fuses, etc.) if the loads (resistors) are connected in WYE. (b) What is the LINE current if the resistors are all connected in WYE? (c) Draw the circuit diagram and calculate the LINE current if the resistors are all connected in DELTA? (d) While the delta connected load resistors are working fine, and...
3. Three single-phase, 10 kVA, 460/120 V, 60 Hz transformers are connected to form a three-phase...
3. Three single-phase, 10 kVA, 460/120 V, 60 Hz transformers are connected to form a three-phase 460/208 V transformer bank. The equivalent impedance of each transformer referred to HV side is 1.0 + j2.0 Ω. The transformer delivers 25 kW at 0.9 pf lagging at rated voltage. Answer the following questions: (a) Draw a schematic diagram showing the transformer connection. Draw three separate single-phase transformers and complete their primary and secondary connections. (b) Determine the magnitude of transformer primary and...
Please answer this question
Q3. The power rating and the voltage ratio of the power transformer and the CT ratio are show in Fig 3. Determine the transformation turns ratios and the connection of the interposing transformers required in order to set the differential relays, which are provided with taps. Draw the complete three- phase connection schematic diagram and identify the currents in each of the elements. 150/ 5Y 115 Transformer Vector group: Primary secondary: Yd5 Primary.tertiary YO 1151V2SMVA13V SMVA...
2. Consider the given 3-phase circuit. Assume the load voltage, PAB = 30L30, Kms (3) Are the loads connected in Wye or Delta configuration? Explain your selection. b. a. (3) Are the sources connected in Wye or Delta configuration? Explain your selection. (5) Draw the single-phase equivalent of the given circuit. Label the line-to-neutral voltage numerically. c. d. (4) Calculate the rms line current phasor in each phase. e. (5) Calculate the rms source voltage phasor in each phase. f...
4. Consider a stepper motor with two phases. Phase 1 is wound with two identical coils. Phase 2 is also wound with two identical coils. Therefore, there are eight wires that come out from the stator winding, four for each phase (a) Connect the phase terminal wires in such a way that the motor can be used as a unipolar wound motor and draw:a schematics for the amplifier circuit of the motor windings (b) Connect the phase terminal wires in...
Prelab 1. In your lab notebook draw the schematic diagram for a three-phase wye-connected induction motor with its three-phase stator winding connected to the three-phase power supply through 25-Ω resistors. Connect two er analyzers in the circuit (between the 25-Ω resistors and the motor) to read the total power absorbed by the induction motor. What is the function of the resistors inserted in the circuit? 2. After reading this lab handout, draw the circuit diagram for the induction motor-synchronous generator...
What is the answer for questions 2-5?
Questions: 1. Delta-Wye and Wye-Delta configurations both produce: a) Increases in secondary voltages and currents. b) Decreases in the secondary voltages and currents. c) Phase shift between the incoming and outgoing line voltages. d) Additional V3 increases in the secondary voltages and currents. ANSWER: Choose an item. 2. The line voltage at the secondary of a 10:1 wye-delta connected transformer will be: a) Equal to the line voltage at the primary times b)...
select one Best match
11) A 12 kV radial system is given below, Assuming using relay CO-7, 3 cycles breaker operation time and 0.5 second coordination time delay, what are the best settings to protect the system shown below: (10 points) 12 kV Typical time curves ype Co-7 C.T.R-400/5 C.T.R-200/5 Current tap settings: 4.5,6,78,10,12 amperes 4 MVA Isc-1.6 kA 4 MVA Isc-1.2 kA Time dial TS1 TDS1 TS2 TDS2 A) 51/252 B) 41/24 C) 51/25 D) 41/24 2 4 5...
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