Investigate the different transformer connection in terms of their performance under balanced loads. For the following...
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Investigate the different transformer connection in terms of
their performance under balanced loads.
For the following...
please show clear steps Investigate the power delivering capacity of different transformer for the following different...
please show clear steps Investigate the power delivering capacity of different transformer for the following different three phase transformer connections. (1). Grounded Y - Ungrounded Y (2). Y-Y (3). Delta-Y (4). Delta-Delta
Given a 3-phase WYE transformer at tached to WYE connected loads, each having a value of...
Given a 3-phase WYE transformer at tached to WYE connected loads, each having a value of 100 2, and the phase voltage, Vp 100 V, determine the line voltage and line current for each load. (a) 100 V@1A (c) 100 V@ 1.73 A (b) (d) 173 V@1A 173 V @ 1.73 A For a balanced 3-phase system the power (S) may be determined according to the formula S 3 VL IL VA (volt-amperes). A 3-phase, WYE-connected, 200-k V A alternator...
A 100 MVA, 66 kV/230 kV, Delta- Wye three phase transformer is protected by a differential...
A 100 MVA, 66 kV/230 kV, Delta- Wye three phase transformer is protected by a differential relay. Current transformer ratio at the LV side is 1000 :5 A. a) Sketch connection of differential relays to the transformer b) Current transformers available for use at the HV side are 800:5, 600:5, 400:5 and 200:5. Select the suitable CT ratio. c) Sketch the phasor diagram to show currents in current transformers windings and power transformers windings d) Calculate the percentage of the...
A balanced Y-connected voltage source is applied to a balanced A-connected load with Zad (45-j30) ohm/phase...
A balanced Y-connected voltage source is applied to a balanced A-connected load with Zad (45-j30) ohm/phase connected, 150 kVA transformer. According to the rating of the transformer, which is on a reactance of the transformer is j0.8 per unit (ignore the magnetizing branch impedances) LOAD 13.2kV 480V Z j0.8 pu a) Utilizing a three-phase Stue of 100 kVA and transformer voltages as bases, draw the single phase b) What does the voltage (V) at the source to need to be...
Draw schematic (connection) diagrams for three-phase Y-Y and Y-Δ connected transformers using three single-phase (50 VA,...
Draw schematic (connection) diagrams for three-phase Y-Y and Y-Δ connected transformers using three single-phase (50 VA, 120V/25V) transformers you have previously worked with in the lab. Show proper dot markings for each configuration. I. 2. Find the line-line voltage ratio (VuVa) for each configuration. For a three-phase Δ-connected resistive load (25 Ω in each leg), connected on the transformer low voltage side, calculate the line current on each side of the transformer for each configuratio Is it safe to operate...
The following three-phase, balanced loads are connected across a three-phase, Y-connected 60 Hz source with a...
The following three-phase, balanced loads are connected across a three-phase, Y-connected 60 Hz source with a line-to-line voltage of 480 V. The loads are described below: • Load 1: ∆-connected, total three-phase apparent power is 30 kVA at 0.95 power factor lagging. • Load 2: ∆-connected, total three-phase active power is 20 kW at 0.7 power factor lagging. • Load 3: Y-connected, phase current is 30 A, and power factor is 0.9 pf leading. (a) Calculate the total complex power...
solve no: 3.14 , 3.16, 3.19 please show each step and solve for beginners 120 Power...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
Good day all. I am facing the following problem and would like to seek some kind...
Good day all.
I am facing the following problem and would like to seek some
kind help, please.
Sincerely appreciate all help and input.
- Ms Tan
1. An 10 MVA, 33 kV, 34 pole, 60 Hz, three-phase wye-connected synchronous generator has a synchronous reactance of 10 and a negligible armature resistance. a. Find the synchronous speed of this generator. b. At a certain excitation, the generator delivers 50% of rated load at 0.7 leading power factor at '33' kV....
answer the following multiple choice questions 5. The most common phase serving . residence would be...
answer the following multiple choice questions
5. The most common phase serving . residence would be single phase bwo or double phase three phase multiple phases none of the answers provided RV9,1110 11. A KVA code letter indicates the innush current per hp. size of the short circult protectors size of the overcurrent protectors size of the thermal overloads none of the answers provided 6. RPM is the approximate speed under full-Hoad conditions when voltage is at rated value when...
Given a 3-phase WYE transformer at tached to WYE connected loads, each having a value of 100 2, and the phase voltage, Vp 100 V, determine the line voltage and line current for each load. (a) 100 V@1A (c) 100 V@ 1.73 A (b) (d) 173 V@1A 173 V @ 1.73 A For a balanced 3-phase system the power (S) may be determined according to the formula S 3 VL IL VA (volt-amperes). A 3-phase, WYE-connected, 200-k V A alternator...
A balanced Y-connected voltage source is applied to a balanced A-connected load with Zad (45-j30) ohm/phase connected, 150 kVA transformer. According to the rating of the transformer, which is on a reactance of the transformer is j0.8 per unit (ignore the magnetizing branch impedances) LOAD 13.2kV 480V Z j0.8 pu a) Utilizing a three-phase Stue of 100 kVA and transformer voltages as bases, draw the single phase b) What does the voltage (V) at the source to need to be...
Draw schematic (connection) diagrams for three-phase Y-Y and Y-Δ connected transformers using three single-phase (50 VA, 120V/25V) transformers you have previously worked with in the lab. Show proper dot markings for each configuration. I. 2. Find the line-line voltage ratio (VuVa) for each configuration. For a three-phase Δ-connected resistive load (25 Ω in each leg), connected on the transformer low voltage side, calculate the line current on each side of the transformer for each configuratio Is it safe to operate...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
Good day all.
I am facing the following problem and would like to seek some
kind help, please.
Sincerely appreciate all help and input.
- Ms Tan
1. An 10 MVA, 33 kV, 34 pole, 60 Hz, three-phase wye-connected synchronous generator has a synchronous reactance of 10 and a negligible armature resistance. a. Find the synchronous speed of this generator. b. At a certain excitation, the generator delivers 50% of rated load at 0.7 leading power factor at '33' kV....
answer the following multiple choice questions
5. The most common phase serving . residence would be single phase bwo or double phase three phase multiple phases none of the answers provided RV9,1110 11. A KVA code letter indicates the innush current per hp. size of the short circult protectors size of the overcurrent protectors size of the thermal overloads none of the answers provided 6. RPM is the approximate speed under full-Hoad conditions when voltage is at rated value when...
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