Study Guide

Objective

The student:
- knows and understands the use and need of transformers of various kinds
- is able to understand and explain the basic functions of different types of transformers
- is able to calculate losses, voltage drops and efficiency of transformers
- knows and understands the functions of different peripherals.

Content

Magnetic circuits.
Application of magnetic circuits for different types of transformers.
Basic functions and connections for transformers.
Calculation of losses, voltage drops and efficiency of transformers.
Single-phase transformers
Three-phase transformers
Special transformers
Instrument transformers

Materials

Compendiums of course responsible and info from transformer manufacturers.

Evaluation scale

H-5

Assessment criteria, satisfactory (1)

Knows the significance of transformers historically and in the present.
Can describe the structure and properties of the transformer in an electrical grid.
Can describe three-phase transformer connections.
Can name and explain the principle for different special transformers.
Can calculate voltage drop in single phase and three phase transformers

Assessment criteria, good (3)

Can describe the function of transformers with physical grounding.
Can calculate voltage drops and losses under load.
Can calculate voltage drop and efficiency at different loads.
Can describe the operating principles for eg. spark-coupled transformers.

Assessment criteria, excellent (5)

Master the relationships between electrical quantities in the operation of transformers.
Master different ways of describing and calculating transformer equivalent schemes.
Can calculate and describe transformer coupling index and turnover for different couplings.
Can describe and calculate important limiting data for current transformers

Qualifications

Electric and magnetic fields.