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CONTENTS

Передмова ....................................................................................... 4
Unit 1. Precautions when Working on Low Voltage Energized
Equipment ........................................................................................ 6
Unit 2. What Engineers should Know about Using Conduits in
Power Substation Designs ............................................................. 10
Unit 3. Physical Structure and Configuration of DC Machines .... 16
Unit 4. Most Common Contributing Factors in Insulation Failure 23
Unit 5. PLC Application for Reduced Voltage-Start Motor
Control ........................................................................................... 27
Unit 6. Types of Electrical Power Distribution Systems ............... 32
Unit 7. Introduction to Distribution Systems ................................. 41
Unit 8. Differences between Disconnectors, Load Switches,
Switch Disconnectors and Circuit Breakers .................................. 50
Unit 9. Short–Circuit Switching (Making/Breaking) Capacity ..... 58
Unit 10. Which Type of Residual Current Device (RCD) to Use
and When? ..................................................................................... 62
Unit 11. Methods of Securing LV Circuit Breakers ...................... 67
Unit 12. 7 Most Known High Voltage Insulation Methods ........... 73
Control tasks .................................................................................. 82
References ...................................................................................... 85
Supplement .................................................................................... 86

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