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A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC = 110 PU and XM = 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.
Correct answer is between '3.5,3.9'. Can you explain this answer?
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A 100,000-KVA 230/115 – kV Δ-Δ three phase power tra...
The transformer supplies a load 80 MVA at 0.85 P.F lagging.
∴ Secondary line current 
= 402 A
= 402 A
The base value of the secondary line current is
So, the P.U secondary current
The per unit primary voltage of this transformer
VP = VS + IZEQ = 1∠0° +0.8∠ − 31.8° (0.02 + j0.55)
= 1.037 ∠1.6°
The voltage regulation 1.037−11×100 = 3.7%
So, the P.U secondary current
The per unit primary voltage of this transformer
VP = VS + IZEQ = 1∠0° +0.8∠ − 31.8° (0.02 + j0.55)
= 1.037 ∠1.6°
The voltage regulation 1.037−11×100 = 3.7%
Most Upvoted Answer
A 100,000-KVA 230/115 – kV Δ-Δ three phase power tra...
KV transformer is a type of electrical transformer that is capable of converting 100,000 kilovolt-amperes of power at a voltage ratio of 230/115 kV. This means that the transformer can handle a maximum power output of 100,000 VA, which is equivalent to 100 megawatts (MW) of power.
The transformer has a primary voltage rating of 230 kV and a secondary voltage rating of 115 kV. This voltage ratio is known as a 2:1 step-down transformer, which means that the secondary voltage is half of the primary voltage.
The transformer is commonly used in high-voltage power transmission systems to step down the voltage from the transmission level (230 kV) to the distribution level (115 kV) for use in residential, commercial, and industrial applications.
The transformer has a primary voltage rating of 230 kV and a secondary voltage rating of 115 kV. This voltage ratio is known as a 2:1 step-down transformer, which means that the secondary voltage is half of the primary voltage.
The transformer is commonly used in high-voltage power transmission systems to step down the voltage from the transmission level (230 kV) to the distribution level (115 kV) for use in residential, commercial, and industrial applications.
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A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer?
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A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer?.
A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer?.
Solutions for A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
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A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer?, a detailed solution for A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? has been provided alongside types of A 100,000-KVA 230/115 – kV Δ-Δ three phase power transformer has a per-unit resistance of 0.02 PU and a per unit reactance of 0.055. The excitation branch element are RC= 110 PU and XM= 20 PU. If this transformer supplies a load of 80 MVA at 0.85 P.F lagging. Find the voltage regulation (in %) of the transformer bank under these conditions.Correct answer is between '3.5,3.9'. Can you explain this answer? theory, EduRev gives you an
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