Introduction to Electrical Engineering

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...........................4 Supplementary equipotential bonding.........................................6 Additional protection........................................... 26 4.1 Protection insulation live parts.........2............................................ 27 5.................................. Safety limits current passing through the human body....... 45 5.............................................. Protection against direct contact.................................... 32 5......2 Protection barriers enclosures ....... 29 5...... 12 2...........................................1.......5 Use protective measures..........2........... BASIC TERMS AND DEFINITIONS FOR ELECTRICAL SAFETY AND ELECTRICAL INSTALLATIONS.............................. 21 4......................................................................................... 7 1..................1........................................................................................................................3........................ VALID TECHNICAL RULES ......................................2...... 31 5............. International and European standardization.........2................................................................................................2......................................................... 15 3...............................2..1........................ BASIC ELECTROTECHNICAL STANDARDS.................... Conventional touch voltage limit......3....................................4 Protection electrical separation................... Rules for installation electrical equipment (apparatus and appliances)............................... 73/2010 (important electrical equipment) ..... 41 5.......................2....................... 37 5..................................... 30 5............ 51 6.............................................. 36 5...2.... 49 6.........................1.........2......................... 26 4................................2......................1............. 56 6.............................................. The Act No..................................... 47 5........1................1..1 Types system earthing.............................................................. 53 6....... 11 2....... 34 5................1...2 Examples designations with the Code...............................................................1.............2. 13 2............................ Principles ..............1 Elements the Code and their meaning . 50/1978 (qualification persons) ................ 22/1997 (Technical Requirements for Products) ..................CONTENTS 4 CONTENTS PREFACE .... 37 5....................4 Protection placing live parts out reach .................. Degrees protection provided enclosures (IP Code) ................................2.................1........................................... IEC Basic Standards ......1..................................2...............3 Protection obstacles.............................. CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT .....................................1... 47 5................ 7 1.................................. 32 5................. EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY.................... Notice No................................................2......................... Protection against indirect contact.....2............................... General............................. 45 5...................................................1....................1 Classification electrical and electronic equipment with regard protection against electric shock the event insulation fault.......................................................4...................... Protection against both direct and indirect contact....................................... 42 5... 33 5..2..............................2....... 17 4. FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK ............................... 57 ...................................2 Protection automatic disconnection supply.....................7 Protective measures systems ......2..........................2.................................... 43 5................... Notice No.................................................... 4 1..................................... 21 4.... 31 5.............. 10 1...........................................................................................................................................2...2...2 Measures for protection automatic disconnection supply.........3 Protection use Class equipment equivalent insulation ...................3.......... ................................. 51 6...................................... 26 4........................5 Protective measures system ........ Resistance (impedance) the human body .....2............1......................................................................1 Requirements for characteristics protective devices.......................................................................3... 12 2....................2...................6 Protective measures systems .............3 Main equipotential bonding ............... 3 CONTENTS . 31 5............................................... 43 5.

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