Study Guide

Objective

Know the principles of different electricity prices and tariffs and be able to make simple cost estimates.
Knowing the structure of electricity distribution networks.
Understand and be able to calculate voltage drops, overloads, short circuits and various disturbances in the electricity grid.
To be able to design conductors taking into account the permissible load, voltage drop and short-circuit resistance.
To be able to calculate the need for phase compensation.
To know the principle of different types of protection.
To know and be able to describe different grounding systems.
To be able to explain and calculate earth slopes in isolated networks.
To know the methods for inspections, checks and measurements.

Content

Electricity prices and different tariffs.
Construction of electricity distribution networks.

Voltage drop, overload, short circuit and various disturbances in the mains.
Design of conductors.
Phase compensation.
The principle of different types of protection.
Earthing systems
Groundings in isolated grids.
Inspections, checks and measurements.

Location and time

Lessons in class and laboratory sessions in Technobothnia according to the schedule in Peppi.
Time for submission of laboratory reports and any additional information: within two weeks after the last lessons according to the schedule.

Materials

Compendiums by the course coordinator.
Compendiums, lectures and information available on the Internet.
Degree projects available.
Information from manufacturers and sellers of electrical equipment.

Teaching methods

Lectures, calculations, laboratory work and self-study.
Information and study material are presented in Moodle for the course.

Exam schedules

The time for a joint exam and any extra exam is determined in agreement with the students during the course. Lessons in class and laboratory sessions according to the established schedule in Peppi. Laboratory reports are submitted within two weeks of each laboratory.

Completion alternatives

Assessment of assignments, laboratory work, laboratory reports and theoretical tests.

Student workload

A total of 81 hours divided into lessons in class (20h), laboratory sessions (16h), self-study and preparation of laboratory reports.

Evaluation scale

H-5

Assessment criteria, satisfactory (1)

Know the principles of electricity distribution.
Knows about network construction and principle diagrams.
Knows about the effect of the reactive power on the net.
Can calculate electricity prices for ordinary consumers.
Can calculate voltage drop in mains.
Can measure ground resistance.

Assessment criteria, good (3)

Know the principles and methods of electricity distribution.
Can design low voltage networks.
Can calculate components for phase compensation.
Can calculate electricity prices for ordinary and special consumers.
Can calculate voltage drop and make judgments considering dimensions.
Can account for different earthing and make measurements of earthing resistance.
Understands the principles of earth fault protection in isolated networks.

Assessment criteria, excellent (5)

Know the principles and methods of electricity distribution.
Can design low voltage networks.
Can calculate components for phase compensation.
Can calculate electricity prices for ordinary and special consumers.
Can calculate voltage drop and make judgments considering dimensions.
Can account for different earthing and make measurements of earthing resistance.
Understands the principles of earth fault protection and can calculate earth fault currents and zero voltage at earth fault.

Assessment methods and criteria

The main basis for the grade in the course is determined by the points in the course stent. The course element consists of questions that are answered in writing and calculations.
The laboratory work and the reports are assessed and can increase or decrease the grade from the exam.

Assessment criteria, fail (0)

Less than 30% of the total points in the test or omitted laboratory reports.

Assessment criteria, satisfactory (1-2)

Grade 1: 30 - 39% of the total points
Grade 2: 40 - 57% of the total points

Assessment criteria, good (3-4)

Grade 3: 58 - 74% of the total points
Grade 4: 75 - 91% of the total points

Assessment criteria, excellent (5)

Grade 5: 92 - 100% of the total points

Qualifications

Electrical safety and measurement technology