• Home
  • Courses
  • Machines
    • Transformer
    • AC Motors
      • Induction Motor
      • Synchronous Motor
    • DC Motor
    • DC Generator
  • Power System
    • Circuit Breaker
    • Switchgear
    • Substation
    • Control System
    • Measurement
  • Electronics
  • Books
  • Blog
  • Forums
  • Contact
    • Contact Us
    • About
    • Privacy Policy
RegisterLogin
StudyElectrical.ComStudyElectrical.Com
  • Home
  • Courses
  • Machines
    • Transformer
    • AC Motors
      • Induction Motor
      • Synchronous Motor
    • DC Motor
    • DC Generator
  • Power System
    • Circuit Breaker
    • Switchgear
    • Substation
    • Control System
    • Measurement
  • Electronics
  • Books
  • Blog
  • Forums
  • Contact
    • Contact Us
    • About
    • Privacy Policy

Transformer

  • Home
  • Blog
  • Transformer
  • All Day Efficiency of Transformer

All Day Efficiency of Transformer

  • Categories Transformer, Basic Electrical, Circuit Breaker, Electrical Machines, Locomotives, Power System, Substation, Switchgear
all day efficiency of transformer

The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is known as all day efficiency.Three phase distribution transformer IMG 8096 Hurum Norway

The ordinary or commercial efficiency of a transformer is defined as the ratio of output power to the input power.

Commercial efficiency = Output power ∕ Input power

Importance of All Day Efficiency

There are certain types of transformers whose performance cannot be judged by commercial efficiency.

For instance, distribution transformers used for supplying lighting loads have their primaries energized all the 24 hours in a day but the secondaries supply little or no load during the major portion of the day.

It means that a constant loss (i.e., iron loss) occurs during the whole day but copper loss occurs only when the transformer is loaded and would depend upon the magnitude of load. 

Consequently, the copper loss varies considerably during the day and the commercial efficiency of such transformers will vary from a low value (or even zero) to a high value when the load is high.

The performance of such transformers is judged on the basis of energy consumption during the whole day (i.e., 24 hours). This is known as all day efficiency or energy efficiency.

What is All day Efficiency?

The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is known as all day efficiency.

ηall-day = kWh output in 24 hours ∕ kWh input in 24 hours

All day efficiency is of special importance for those transformers whose primaries are never open-circuited but the secondaries carry little or no load much of the time during the day.

In the design of such transformers, efforts should be made to reduce the iron losses which continuously occur during the whole day.

Note. The efficiency of a transformer means commercial efficiency unless stated otherwise.

Read : Percentage Impedance of Transformer

  • Share:
author avatar

Previous post

How to Make a DC Motor at Home?

Next post

Characteristics of DC Series Motor

Leave A Reply Cancel reply

Your email address will not be published. Required fields are marked *

Login with your site account

Connect with

Login with Facebook Login with Google Login with LinkedIn

logo


Lost your password?

Not a member yet? Register now

Recent Articles

  • 7 FE Electrical and Computer Practice Problems with Solutions
  • Sinusoids and Phasors
  • 2 Important Distribution Transformer Testing Methods
  • What is welding cable? Where to buy cheap cable for my welding plant?
  • Facts Everyone Should Know About Trailer Wires
For Advertisements Contact
[email protected]

Copyright © 2020 Study Electrical, Inc.

© StudyElectrical.Com 2020

Connect with

Login with Facebook Login with Google Login with LinkedIn

logo

Login with your site account

Connect with

Login with Facebook Login with Google Login with LinkedIn

logo


Lost your password?

Not a member yet? Register now

Register a new account

Connect with

Login with Facebook Login with Google Login with LinkedIn

logo


Are you a member? Login now