Logo
Home Study Material Contact Search
AI Chat FREE
  1. engineering
  2. electrical engineering
  3. a three phase transformer of 400kva, 10kv/400v, dy

A three phase transformer of 400kVA, 10kV/400V, Dy11 is connected to its nominal load with cosφ...

50.1K

Verified Solution

Question

Electrical Engineering

A three phase transformer of 400kVA, 10kV/400V, Dy11 isconnected to its nominal load with cosφ = 1.

a) Calculate the nominal primary and secondary linecurrent.
b) Calculate the corresponding currents in the primary andsecondary winding.

At an open circuit test, the primary line current is 0,52A withcosφ = 0,05 at nominal line voltage.
The short circuit test (at nominal current) shows 214V primary linevoltage and P=1,333kW per phase.

c) Calculate the total iron losses and total copper losses ofthis transformer.

d) Calculate the efficiency η of this transformer.

Now the transformer will be loaded with 210kW with cosφ = 0,83(lagging).

e) Give both the iron losses and the copper losses as apercentage of what they are nominally.

Please show process and computations withcomments.

Answer & Explanation Solved by verified expert
4.0 Ratings (659 Votes)
    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Statistics
1.2K views

1. If the number of arrivals at a cell phone kiosk has a rate of 0.80...

Accounting
1.2K views

Could you give me an answer fast you can please. Thank You.! Learning Objectives: CHAPTER 5 Account...

Physics
1.2K views

In a coil of area 10 cm and 10 turns the magnetic field is directed...

Physics
1.2K views

is under pure rolling on a rough horizontal surface If the velocity of its center...

Physics
1.2K views

Which of the following is incorrect about Lenz s law It explains the physical significance...

Statistics
1.2K views

In a randomized experiment from the University of Wisconsin one group consisted of a representative...

Calculus
1.2K views

Evaluate the integral xyz dS where S is that part of the plane z 8...

Algebra
1.2K views

point Let A 1 2 3 4 5 6 a How many subsets of A...

Accounting
1.2K views

Find dy/dx by implicit differentiation y = cot(y) dy/dar 1

Accounting
1.2K views

Menk Corporation has provided the following information: \table[[,\table[[Cost per],[Unit]],\table[[Cost per],[Period]]],[Direct materials,$6.80,],[Direct labor,$3.80,],[Variable manufacturing overhead,$2.00,],[Fixed...

Accounting
1.2K views

What account should never be used in an adjusting journal entry? a. Unearned Service...

Finance
1.2K views

Jamie deposits $1000 into an account paying 6 per cent interest, compounded annually. At the...