Show how winding of delta-Y Transformer or Y-delta Transformer an be arranged in a way that...
Show how winding of delta-Y Transformer or Y-delta Transformer an be arranged in a way that always high voltage side lead the low voltage side if positive sequence is applied.
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Show how winding of delta-Y Transformer or Y-delta Transformer
an be arranged in a way that...
Problem 2: A three-phase transformer bank (1-phase transformers) is to handle 30 MVA and have a...
Problem 2: A three-phase transformer bank (1-phase transformers) is to handle 30 MVA and have a primary voltage of 115kVLL and a secondary voltage of 4.16kVLL. Find the rating of each individual transformer in the bank (high side voltage, low side voltage, transformer turn ratio, and apparent power rating of each transformer) if the bank is connected: Wye-Wye Wye-Delta Delta-Wye Delta-Delta Draw winding connections for (a)-(d) (NOTE: This step does not need to be done in MATLAB). Assume all delta...
Problem 3. A three-phase transformer is constructed using three single-phase two-winding trans- formers, each has the...
Problem 3. A three-phase transformer is constructed using three single-phase two-winding trans- formers, each has the same ratings of 500 MVA, 15/240 kV, and leakage impedance of XT.p.u 0.2 p.u The high-voltage side of the three-phase transformer is connected to a three-phase Y-connected load that absorbs 1000 MVA at 0.9 power factor (lagging). The phase-a voltage across the load is Van 2402(0) kV. Answer the following questions. [10 points] a) Calculate the phase-a voltage at the low-voltage side (denoted by...
A single phase transformer has 2000 turns on the primary winding and 500 turns on the...
A single phase transformer has 2000 turns on the primary winding and 500 turns on the secondary. Winding resistances are ?1 = 2Ω, ?1 = 8Ω, ?2 = 0.125Ω, ?2 = 0.5Ω, ?? = 1122?? 800Ω and ???? = 1000Ω. a. Draw the complete circuit for the transformer with the parameters and transformation ratio indicated. b. Refer the secondary parameters to the primary side and draw the equivalent circuit (Draw the circuit with the core in parallel with the voltage...
Problem 3: A 3-0, IMVA, 13.8kV/4160V, 60 Hz, transformer with Y-A winding connection is supplying a...
Problem 3: A 3-0, IMVA, 13.8kV/4160V, 60 Hz, transformer with Y-A winding connection is supplying a 3-0, 0.75 p.u. load on the 4160V side of the transformer. The land has leading power factor of 0.0.11 buc by 1 p.u. voltage on the 13.8kV side. The transformer per unit impedance is j0.12 referred to the secondary side. a) Find the load impedance b) Find the input current on the primary side in real units c) Find the input power factor
please answer all questions from i to vi. ULIUS 1. Explain how a fuse saving scheme...
please answer all questions from i to vi.
ULIUS 1. Explain how a fuse saving scheme is performed using a reciose. ii. What is a sectionalizer and how does it work is a sectionalizer and how does it work in coordination with a recloser? 111. Explain the effect of the magnetizing inrush current on transformer IV. Explain how transformer core faults, inter-turn faults and oil leaks be detected. V. Show the wiring diagram of a differential relay to protect a...
The two questions below. Like will be given, thanks! 1. What is the advantage of winding...
The two questions below.
Like will be given, thanks!
1. What is the advantage of winding the primary and secondary windings on the same limb of the core of a transformer? 2. The open circuit test on a 500 kVA, 69 kV / 4.16 kV, 60 Hz single phase transformer gave a wattmeter reading of 2400 W. The high voltage side was open and the measurements were taken on the low voltage side. What would be the reading of the...
A 150 KVA, 2080/208-V, 3 PHASE, delta-wye transformer with the following: RH 450m2 R 4.5m XH 2.20...
A 150 KVA, 2080/208-V, 3 PHASE, delta-wye transformer with the following: RH 450m2 R 4.5m XH 2.20 Load 120 KVA, 90KW (lagging power factor) at rated terminal voltage of 208V Determine a) b) c) The approximate equivalent circuit referred to the low-voltage side The primary voltage The transformer efficiency Please show the following: Circuit with the values given & found Equations used
A 150 KVA, 2080/208-V, 3 PHASE, delta-wye transformer with the following: RH 450m2 R 4.5m XH 2.20 Load...
1. If 480 volts is applied to the primary winding of a transformer which has 300...
1. If 480 volts is applied to the primary winding of a transformer which has 300 turns in the primary winding and 15 turns in the secondary winding, the secondary voltage will be A. 0.0417 volts. C. 56.8 volts B. 24 volts. D. 9600 volts. 2. A distribution transformer with a grain-orientented steel core is highly efficent because its A. exciting current is sufficiently high. B. flux direction is parallel to the stell-rolling direction C. permeability is increased due to...
Calculate the short circuit current of a 3-phase delta-wye connected transformer if the short circuit occurs...
Calculate the short circuit current of a 3-phase delta-wye connected transformer if the short circuit occurs between phase A and the neutral at the low voltage side. The transformer is supplied by a 12.5kV line-to-line voltage. The transformer rating is 50kVA, 12.5kV/500V and 9.2% (leakage reactance)
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connecte...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connected 22 KV 40 MVA A-connected 4 KV 15 MVA Primary Tertiary Neglecting winding resistance and exciting current, the per unit leakage reactance are: Mps 9.6 % pu on 40 MVA, 11022 KV xm = 7.2 % pu on 40 MVA, I 10/ 4 KV Xsti: 12 % pu on 40 MVA, 22/ 4 KV Determine the era nyimpedances of the transformer...
Problem 3. A three-phase transformer is constructed using three single-phase two-winding trans- formers, each has the same ratings of 500 MVA, 15/240 kV, and leakage impedance of XT.p.u 0.2 p.u The high-voltage side of the three-phase transformer is connected to a three-phase Y-connected load that absorbs 1000 MVA at 0.9 power factor (lagging). The phase-a voltage across the load is Van 2402(0) kV. Answer the following questions. [10 points] a) Calculate the phase-a voltage at the low-voltage side (denoted by...
Problem 3: A 3-0, IMVA, 13.8kV/4160V, 60 Hz, transformer with Y-A winding connection is supplying a 3-0, 0.75 p.u. load on the 4160V side of the transformer. The land has leading power factor of 0.0.11 buc by 1 p.u. voltage on the 13.8kV side. The transformer per unit impedance is j0.12 referred to the secondary side. a) Find the load impedance b) Find the input current on the primary side in real units c) Find the input power factor
please answer all questions from i to vi.
ULIUS 1. Explain how a fuse saving scheme is performed using a reciose. ii. What is a sectionalizer and how does it work is a sectionalizer and how does it work in coordination with a recloser? 111. Explain the effect of the magnetizing inrush current on transformer IV. Explain how transformer core faults, inter-turn faults and oil leaks be detected. V. Show the wiring diagram of a differential relay to protect a...
The two questions below.
Like will be given, thanks!
1. What is the advantage of winding the primary and secondary windings on the same limb of the core of a transformer? 2. The open circuit test on a 500 kVA, 69 kV / 4.16 kV, 60 Hz single phase transformer gave a wattmeter reading of 2400 W. The high voltage side was open and the measurements were taken on the low voltage side. What would be the reading of the...
A 150 KVA, 2080/208-V, 3 PHASE, delta-wye transformer with the following: RH 450m2 R 4.5m XH 2.20 Load 120 KVA, 90KW (lagging power factor) at rated terminal voltage of 208V Determine a) b) c) The approximate equivalent circuit referred to the low-voltage side The primary voltage The transformer efficiency Please show the following: Circuit with the values given & found Equations used
A 150 KVA, 2080/208-V, 3 PHASE, delta-wye transformer with the following: RH 450m2 R 4.5m XH 2.20 Load...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connected 22 KV 40 MVA A-connected 4 KV 15 MVA Primary Tertiary Neglecting winding resistance and exciting current, the per unit leakage reactance are: Mps 9.6 % pu on 40 MVA, 11022 KV xm = 7.2 % pu on 40 MVA, I 10/ 4 KV Xsti: 12 % pu on 40 MVA, 22/ 4 KV Determine the era nyimpedances of the transformer...
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