Transformers SCQF Level 8

An in-depth introduction to transformers in relation to electrical engineering.


Why take this course?

A transformer is a device used for transforming an AC voltage of one level into a voltage of another level with minimum power loss. Worldwide, transformers are used extensively in electricity supply systems, and many industrial consumers have voltage distribution networks running at high voltages that incorporate transformers.

This Unit has been designed to enable you to develop the knowledge and skills that will allow you to understand the theory and principles of these transformers.

What you will experience

You will begin by learning about the materials and designs used in the construction of transformers. You will then progress to study the operation of transformers. You will learn how to calculate quantities such as efficiency and voltage regulation. Both single phase and three phase transformers will be covered in this Unit. You will learn about the different winding configurations used in transformers, and the conditions required to be satisfied before individual transformers can safely be paralleled together. The operation and application of transformer fittings such as cooling systems and tap changers will be investigated, and the methods of protecting transformers against fault damage will be explained. 

In summary, by the end of this Unit you should be able to: explain the construction characteristics of transformers; analyse the operation of single-phase transformers on load; analyse the operation of three phase transformers; and explain transformer protection.

The formal assessment for the Unit will take two forms: a laboratory exercise (or case study) and a written, two hour assessment paper. The laboratory exercise or case study will take place during the delivery of the Unit. The written assessment paper will be carried out at the end of the delivery of the Unit, and it will be conducted under closed book conditions. This means that you will not be allowed to take notes, textbooks etc. into the assessment. You will be allowed to use a scientific calculator.

female wearing blue overalls and protective glasses

Key facts

Mode of study
Distance Learning
Method of study

This course requires you to manage your workload independently, and will involve attendance at a campus or centre - often for assessment purposes only.

Subject area

Entry requirements

Candidates should have a broad knowledge and understanding of electrical principles and their application in a building services context. You should also have an understanding of the principles and applications of mathematics in an electrical environment. This may be evidenced by the possession of the following Higher National Units: DG54 34 Single Phase A.C. Circuits, DG4H 33 Mathematics for Engineering 1: Electronics and Electrical.

What you will need

Students are responsible for securing unit resources listed.

What you need to know

Additional costs

This course involves an additional SQA fee. Please see our Courses Explained page for further information on costs.

Anything else?

Please note that fee waivers may apply. Find out more about funding for part-time courses.

Next steps




This course requires some attendance at College, often for assessment purposes only. Please enquire about expectations for your specific course when booking.

Attendance is usually at the Aberdeen City Campus or Fraserburgh Campus.

Pre-entry guidance is required prior to booking a place on this course. Please contact Distance Learning Co-ordinators Sheena Thomson or Susan Smith by email, or phone 01346 586136 in the first instance for more information. When submitting your distance learning application form, please ensure you attach the additional information sheet listing qualifications and previous knowledge with your application. You may be required to attend College for assessment. Please check if this is a requirement for your course.

Duration Fees* Code
40 Hours over 6 Months £125.00
Paper applications only

Paper applications

You must submit a paper application form for this course and return it to us completed and signed.

Completed forms should be returned to the following freepost address:

The Student Information & Admissions Manager
North East Scotland College
Aberdeen City Campus

Should you have any problems with your application, please contact the Student Advice Centre:

Telephone: 01224 612330

If you take up a place on a College course, at the start of the course you will be asked to sign an enrolment form. In signing the form and/or taking up a place on a College course, you will enter into a contract with the College and be bound by the North East Scotland College Standard Terms and Conditions of Study. Copies of the Terms and Conditions are available for inspection on notice boards and at various locations throughout the College, at the College Reception, on the College website:, or can be obtained on request from the Student Funding and Admissions Manager, North East Scotland College, Aberdeen City Campus, Gallowgate, Aberdeen AB25 1BN. Please note that courses are offered subject to (a) there being sufficient numbers of enrolments and (b) the availability of resources. The College reserves its right (i) not to run courses where the number of students is considered insufficient or where resources are unavailable and (ii) in certain circumstances, to refuse admission to an individual applicant.