Introduction to Electrical Engineering

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

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