Introduction to Electrical Engineering

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......... 33 5..................................3 Protection use Class equipment equivalent insulation .......................................2...........4 Protection electrical separation................ 15 3......3............ 26 4.................................2....... 30 5...1................ 4 1............ Protection against both direct and indirect contact................................................................... 12 2..............2....1................................2...................................................1.........2...2......... Conventional touch voltage limit..... 31 5................... 31 5........ FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK ............. 51 6..........................2.4........................... Notice No.... Rules for installation electrical equipment (apparatus and appliances).2.......................................................................2....... 56 6.................................... The Act No...............................................................................................................................................1..................................5 Protective measures system ............................1 Classification electrical and electronic equipment with regard protection against electric shock the event insulation fault...........7 Protective measures systems .......................................................................... 7 1.. 32 5.......................2 Protection barriers enclosures ................ 47 5..4 Supplementary equipotential bonding.............. 12 2.......2 Measures for protection automatic disconnection supply.................CONTENTS 4 CONTENTS PREFACE .......... 21 4.......2..................... International and European standardization................... Notice No...........................2................................................................... 17 4........................... CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT ..................................................2....................2.................................................................... Degrees protection provided enclosures (IP Code) ........ General............2 Examples designations with the Code.................... 43 5... ............................................1 Requirements for characteristics protective devices..............................2 Protection automatic disconnection supply...............................................2...................................1.. 42 5......................... 45 5....... 10 1.........................................2..........................................................................................3..................................... 31 5................................................... 32 5................................. Protection against direct contact.....2..........................1...5 Use protective measures....... 73/2010 (important electrical equipment) ....... 21 4................................................2.....2....................4 Protection placing live parts out reach ..................6 Protective measures systems .............................................. BASIC ELECTROTECHNICAL STANDARDS............... 26 4.........2..................................................................................... 57 .......................................... Protection against indirect contact..............................................2..............................1..... 53 6............ 37 5............................... 13 2. 11 2.............................................................3 Main equipotential bonding ............... 45 5.............. 41 5....................................1...... EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY..3 Protection obstacles... 51 6.............. 29 5.....................................1 Protection insulation live parts....................................................... IEC Basic Standards ....................................................................................................... 36 5...........1.. 7 1.1...........1 Types system earthing................................ Safety limits current passing through the human body....................... 50/1978 (qualification persons) ....................... BASIC TERMS AND DEFINITIONS FOR ELECTRICAL SAFETY AND ELECTRICAL INSTALLATIONS....... Principles ....1 Elements the Code and their meaning ........ 34 5..................... Resistance (impedance) the human body ........................................1. 49 6..................................................1...........1..................................................... 3 CONTENTS .............1............... 47 5... 37 5........................................3........................................................3.......................................................... 43 5.........2................................................ 26 4..2........................... 27 5........................6 Additional protection....... VALID TECHNICAL RULES ......2.... 22/1997 (Technical Requirements for Products) ................................................

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