Introduction to Electrical Engineering

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...................................................1....................................... 45 5............... General............ 21 4...........1................................ 43 5..................2 Examples designations with the Code...................................... 56 6.........................................................2................1....................1..................3 Protection use Class equipment equivalent insulation ..........6 Protective measures systems .............................2 Protection barriers enclosures ....................3...............1..................................................... 32 5....1 Classification electrical and electronic equipment with regard protection against electric shock the event insulation fault........1..............2......2.......CONTENTS 4 CONTENTS PREFACE ...1............. 15 3... 30 5... 50/1978 (qualification persons) ................3.... 7 1........................................ IEC Basic Standards ....... 10 1............................................................. 29 5............................. International and European standardization.................................. 32 5..................................................... 31 5............................................................ 47 5....................................2...............................2.......2..........................2 Protection automatic disconnection supply..........................2...........2......3........ 45 5.......... 13 2...........2.1 Types system earthing....... 11 2. 37 5.........................................................................4.............................................................................................................................. 31 5........................... Protection against both direct and indirect contact.................... 51 6. Resistance (impedance) the human body . EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY..................... Principles ...............................................................4 Protection electrical separation..... 26 4..1............ 73/2010 (important electrical equipment) ...1... Conventional touch voltage limit................ 33 5...2..............................................1................ Notice No............. 4 1................ Protection against indirect contact.............................................. 43 5................................. Safety limits current passing through the human body..1........................6 Additional protection........2...2......2........................................................................2...........................................................................4 Supplementary equipotential bonding.................... 26 4....................4 Protection placing live parts out reach ...............3 Main equipotential bonding ................................................. BASIC ELECTROTECHNICAL STANDARDS................... VALID TECHNICAL RULES ..... ...1.........................................3 Protection obstacles.2.................................... 21 4... 7 1................... 17 4. 12 2.......................................................... 57 ........................... 51 6............................ Protection against direct contact.................................................. Notice No......3.........................2....................................2............................. 22/1997 (Technical Requirements for Products) ................. CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT .................... The Act No............... 47 5..........................................................................2......................................................................................................................................................2 Measures for protection automatic disconnection supply..............2.5 Use protective measures........... Rules for installation electrical equipment (apparatus and appliances)...............2.2................ 53 6..............................1 Elements the Code and their meaning .................................................................. 26 4......................... FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK ...........2.......... Degrees protection provided enclosures (IP Code) .... 27 5................1.................. 42 5... 3 CONTENTS .............. 12 2.................5 Protective measures system ...................................................... 49 6................................................................................................................. 41 5............................................1 Protection insulation live parts...................................2......... 31 5....7 Protective measures systems ............................1 Requirements for characteristics protective devices.................................................. BASIC TERMS AND DEFINITIONS FOR ELECTRICAL SAFETY AND ELECTRICAL INSTALLATIONS.......... 36 5........................... 37 5............................................................ 34 5....................1.............

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