Study Guide

Objective

After passing the course, the student is expected to:
Know and be able to calculate how the electric field strength is distributed when combining different insulating materials.
Know and be able to describe different electrical phenomena that can occur in different types of insulating material.
Know and be able to describe how different insulating materials are ageing, and how this can be monitored.
Know and be able to describe how different overvoltages occur, and how to protect electrical equipment against them.
Know and be able to choose equipment for testing and measuring high voltages.

Content

Insulators in electric fields.
Electric discharges.
Isolation process of ageing.
Overvoltage surges.
Test and measurement technology.

Location and time

Weeks 36 to 50 according to the schedule in Peppi

Materials

Compendium, found on Moodle
Elkraftsystem 1, from Elkrafthandboken-series
Suurjännitetekniikka by Aro, Elovaara, etc.

Teaching methods

Lectures
Practical calculation
Self studies
Assessed lab

Exam schedules

Exam around week 43.

Completion alternatives

Written exam
Two lab reports, approved.

Student workload

A total of 81 hours, of which contact lessons are six weeks with two lessons of two hours per week. In addition, two laboratory sessions of 4-5 hours.

Content scheduling

Theory during weeks 36 - 41. Laborations during weeks 43 - 50.

Evaluation scale

H-5

Assessment criteria, satisfactory (1)

Knows how the electric field strength is distributed when combining different insulating materials.
Knows different discharge phenomena that can occur in different types of insulating materials.
Knows how different insulating materials become obsolete, and how the aging process can be monitored.
Knows how different surges occur, and how different electrical equipment can be protected against these surges.
Knows equipment for testing and measuring high voltages.

Assessment criteria, good (3)

Can calculate how the electric field strength is distributed when combining different insulating materials.
Can describe different discharge phenomena that can occur in different types of insulating materials.
Can describe how different insulating materials become obsolete, and how the aging process can be monitored.
Can describe how different surges occur, and how different electrical equipment can be protected against these surges.
Can select and describe equipment for testing and measuring high voltages.

Assessment criteria, excellent (5)

Can calculate different sizes for more complex insulation arrangements.
Can make a detailed description of different discharge phenomena that can occur in different types of insulating materials.
Can make a detailed description of how different insulating materials become obsolete, and how the aging process can be monitored.
Can make a detailed description of how different surges occur, and how different electrical equipment can be protected against these surges.
Can select and describe equipment for testing and measuring high voltages, and describe the accuracy.

Assessment methods and criteria

The written exam consists of five questions of 4 points, ie a total of 20 points. About 50% theoretical questions, other half calculations.
In the calculation exercises, an answer gives four points if the calculations are complete with the right values ​​and the correct answer. Careless errors give deductions.
The lab is assessed with points 1-5 per lab, ie a total of 10 points. The report is primarily assessed, but the own activity during the laboratory session is also taken into account.

Assessment criteria, fail (0)

Less than 10 points and/or unapproved labreports.

Assessment criteria, satisfactory (1-2)

Grade 1: 10 - 11,5 points
Grade 2: 12 - 14,5 points

Assessment criteria, good (3-4)

Grade 3: 15 - 18,5 points
Grade 4: 19 - 23,5 points

Assessment criteria, excellent (5)

24 points and more

Qualifications

The course Electric Power Utilization.