Tech-Wonders.com

Menu
  • Apps
  • How To
  • Gadgets
    • Mobile
  • Software
  • Technology
  • Sitemap
  • Contact Us

Tech-Wonders.com » Electrical

Measurement of 3-Phase Power Using 2 CTs and 1 Wattmeter

To measure the 3-φ power in a balanced circuit, the method or main apparatus used here are 2 CT’s and one Wattmeter. The details of the apparatus required for this measurement are as follow:

  1. Wattmeter 600V, 10A, UPF -> 1 no.
  2. Ammeter (0-10)A MI -> 1 no.
  3. Voltmeter (0-600)V MI -> 1 no.
  4. Current Transformer (CT) 5/5A -> 2 no.
Measurement of 3-Phase Power Using 2 CTs and 1 Wattmeter Circuit Diagram

In this method the power absorbed in a 3-φ balanced circuit is measured using a single wattmeter in conjunction with 2 CT’s. Usually 2-Wattmeter method is used measure the 3-φ power for both balanced and unbalanced load, but method like this requires only one wattmeter. The CT’s used for this method should be of 1:1 ratio.

The primaries are connected in series with the 2 phases. The secondaries are connected to the current coil of wattmeter such that the difference in the two phase currents will flow through the current coil. The wattmeter pressure coil is connected between the same two phases.

Any wattmeter measures the product of

  • Voltage across pressure coil
    voltage-across-pressure-coil
  • Current through the current coil
    current-through-current-coil

Cosine of phase angle between voltage and current is φ.

3-φ Power

The circuit is assumed to be connected in star, for delta connection also the procedure is valid and the wattmeter reads directly total power absorbed.

3-phase delta connection phasor diagram | tech-wonders.com

Procedure

  1. Give the connections as per the circuit diagram.
  2. Apply 415 V, 3-φ, 50Hz supply closing the TPST switch.
  3. Vary the load in suitable steps.
  4. At each load note down the wattmeter readings.
  5. Tabulate the results. Expected example tabulated results are as follows:

    S.NoVL (Volts)IL (Amps)Wattmeter Reading (Watts)ω Calculated (1.732VLIL Cosφ)
    1.4152.4480 x 4 = 19201725.12
    2.4153600 x 4 = 24002156.2

Tweet
Share
Linkedin
Whatsapp
Reddit
Email
Prev Article
Next Article
Tags:Electrical Measurements

One Response

  1. George

    This is truly helpful, thanks.

Leave a Reply Cancel Reply

Ezoic | Increase your site revenue | AI for your ads

Recent Posts

  • Mastering Influencer Marketing: How to Identify, Approach, and Find the Right Influencers for Your Brand
    Mastering Influencer Marketing: How to Identify, Approach, and Find the Right Influencers for Your Brand
  • Top Ways Augmented Reality is Being Used to Optimize Ecommerce in 2023
    Top Ways Augmented Reality is Being Used to Optimize Ecommerce in 2023
  • Crypto Regulations in Australia: An Overview
    Crypto Regulations in Australia: An Overview
  • How Phone Monitoring Can Be Used for Employee Productivity Tracking
    How Phone Monitoring Can Be Used for Employee Productivity Tracking
  • Best Tips for Hiring Globally
    Best Tips for Hiring Globally

Categories

  • Apps
  • Big Data
  • Blog
  • Books and Reviews
  • C Programming Language
  • Cars
  • Certifications
  • Chemistry
  • Computers
  • Data Warehousing
  • Ecommerce
  • Electrical
  • Electronics
  • Engineering
  • Entrepreneurs
  • Facebook
  • Featured
  • FinTech
  • Fuzzy Logic
  • Gadgets
  • Games
  • Gmail
  • Google
  • Google Plus
  • Health Tech
  • How-to Topics
  • Infographics
  • Instagram
  • Internet
  • JavaScript
  • Jobs
  • LinkedIn
  • Marketing
  • Mathematics
  • Microsoft
  • Mobile
  • Numismatics
  • Online Earning
  • Pinterest
  • Plagiarism
  • Programming Languages
  • Python Programming Language
  • Real Estate
  • Road Transport
  • Salesforce
  • Science and Technology
  • Security
  • SEO
  • Social Media
  • Social Networking
  • Software
  • SQL
  • Swift Programming Language
  • TikTok
  • Travel
  • Troubleshooting Tips
  • Twitter
  • Web Designing and Development
  • Websites
  • Windows
  • WordPress
  • YouTube Tips and Tricks

Tech-Wonders.com

Technology Blog

About the Admin

RamaRao Bobby Hi there! I am RamaRao Bobby, Founder and Editor-in-Chief of
Tech-Wonders.com, Kakinada’s Top Technology Blog.

I am an avid Dog Lover and Tech Enthusiast. Read More

  • Archives
  • Disclaimer
  • Privacy Policy
  • Featured Comments

Recent Comments

  • Vinayak on Best Top 10 Marathi Websites and Blogs
  • Bharat Watane on Best Top 10 Marathi Websites and Blogs
  • Shree Dnyanopasana on Best Top 10 Marathi Websites and Blogs
  • Angela Bordio on 6 Online Resources for Improving Your Job Search
  • Deekshitha on Here’s All You Need To Know About Machine Learning And Why AI Is The Future

Always Remain in Touch

Subscribe

Copyright © 2023 Tech-Wonders.com