Tutorials > Electrical Transformers Explained Low Voltage Systems

Electrical Transformers Explained Low Voltage Systems

Date: 17 September 2026 | Posted by: voska89

Learn how transformers work, how to test them, and how they are used in real electrical systems — explained simply.

What you'll learn

⚡ Understand how Low Voltage Transformers Work and how to Connect them.
⚡ Learn how to Calculate the output Voltages on Transformers.
⚡ Learn about Potential Transformers and Current Transformers.
⚡ Gain a good understanding of How Energy Meters work and how to Connect them.
⚡ Learn how the Relay Panel works on a Trade Test.

Requirements

❗ You need the foundation of Electricity before attending this course.
❗ Please complete the Basics of Electricity Course first.

Description

In this Online Course I will teach you how Transformers work, How they get Connected, How to do Transformer Calculations and How PT's and CT's get Connected. I have added extra material just to assist you with more Trade Test Preparation which is Energy Meters and Relay Panel. Course is around 3H20 to complete.
1) Working of a Transformer – Teaches how a basic transformer works. (10:07)
2) Step Down Transformer Calculations – Learn how to calculate Voltages and Current on a Step Down Transformer. (11:54)
3) Step Up transformer Calculations - Learn how to calculate Voltages and Current on a Step Up Transformer. (8:22)
4) Transformer Power Factor – Learn what Power Factor is and its effects in a Transformer. (4:22)
5) Power Factor Calculations – Learn how to do Calculations with Power Factor. (7:32)
6) Transformer Star Delta Connections – Learn how to connect 3 Single Phase Transformers in different configurations. (13:06)
7) 3 Phase Transformer Calculations – Learn how to calculate the output Voltages when connecting transformers in Star Delta configurations. (23:18)
8) Connecting 3 Single Phase Transformers in Star Delta Configurations – Practical video on the actual connecting of 3 Single Phase Transformers in Star Delta configurations. (15:06)
9) Transformer Tapping's Calculations – Learn how to calculate output Voltages on Transformers with Tapping's. (18:38)
10) PT Connected to a Voltmeter with a Selector Switch – Learn how Potential Transformers work and how to connect them using a Selector Switch. (11:30)
11) Ringing out a Voltmeter Selector Switch – Gain understanding of how to ring out a Voltmeter Selector Switch. (8:37)
12) CT Connected to an Ammeter with a Selector Switch – Learn how a Current Transformer works and how to connect it to a Selector Switch. (9:37)
13) PT's and CT's in a Trade Test – Learn what is expected of you in Trade test when connecting PT's and Ct's. (3:48)
14) Energy Meter Connections – Learn how to connect 3 Single Phase Energy Meters to a 3 Phase supply and how to connect a 3 Phase Energy Meter. (9:19)
15) Energy Meters in Trade Test – Learn what is expected of you in Trade test and how to Balance the Loads across the 3 Phases. (13:45)
16) Relay Panel – Get a better understanding of how the Relay Panel works and what is expected of you in Trade Test. (19:10)
17) Fault Finding on a Relay Panel – Learn how to identify faults on the Relay Panel and record your findings (14:42)

Who this course is for

⭐ Anyone with Electrical knowledge that wants to upskill themselves.
⭐ Students who want to prepare themselves for an Electrical Trade Test.

Homepage

https://www.udemy.com/course/transformers-energy-meters-and-relay-panel

DOWNLOAD LINK

No Password - Links are Interchangeable

See full article