Introduction to Electrical Engineering

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...... 31 5........4 Protection placing live parts out reach ............................................................................................ 45 5.............................................1.................................................................................................................................. 13 2...1......................................4................3................... 56 6..................1 Protection insulation live parts.....2................................................................2..................... CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT ................................................................2.................. 50/1978 (qualification persons) ................................................1 Types system earthing...................................... 31 5......2............................................................................................ 7 1...............................................................2...........................2 Protection automatic disconnection supply............... 21 4.................... 22/1997 (Technical Requirements for Products) ................................................................... 31 5.....2.....2 Measures for protection automatic disconnection supply........................................... 73/2010 (important electrical equipment) ............ 17 4.....2......2....................................... 15 3.................. Safety limits current passing through the human body..................................3 Main equipotential bonding ....... Protection against indirect contact.................... International and European standardization........ 32 5.......................... Protection against both direct and indirect contact...................2.4 Supplementary equipotential bonding.................................................2........3 Protection use Class equipment equivalent insulation ...................................................................... 51 6.............CONTENTS 4 CONTENTS PREFACE .................. 47 5........................ BASIC TERMS AND DEFINITIONS FOR ELECTRICAL SAFETY AND ELECTRICAL INSTALLATIONS...2.........................................................2...1 Elements the Code and their meaning ......................................... 45 5........................... 10 1......................... EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY.....................................3.......................2..3 Protection obstacles.............. 37 5........................ 11 2..............6 Additional protection...2............................................ FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK ..1......................................................................7 Protective measures systems ..............2... 30 5..2........................................1.2.............................................................1........ 36 5.3...2..................2.................... 33 5... 4 1............................1....... 3 CONTENTS .........1......................1........................................................................................................... BASIC ELECTROTECHNICAL STANDARDS.........................2 Examples designations with the Code........ 7 1........1..................1 Requirements for characteristics protective devices.................... The Act No........... 37 5..........1......5 Use protective measures............. Resistance (impedance) the human body ......... 26 4..... 12 2.1. Rules for installation electrical equipment (apparatus and appliances)....................2....................................... .......6 Protective measures systems ........................................... Conventional touch voltage limit......................................... 53 6..1....................... 32 5....... 42 5............................. Protection against direct contact... 41 5........................................ 12 2...............5 Protective measures system ................................ 27 5... 21 4.. Degrees protection provided enclosures (IP Code) .................. 47 5...................... 26 4............................1 Classification electrical and electronic equipment with regard protection against electric shock the event insulation fault...... IEC Basic Standards ............ Notice No. 49 6.............................................2..............................................1............................ Notice No................... 34 5.................................. Principles .. 43 5......1.. General..2....................... 43 5......................... 26 4........................................... 51 6.............................2 Protection barriers enclosures ....................................................................... 29 5............................3................................................................................2................................... VALID TECHNICAL RULES ............................... 57 ............4 Protection electrical separation................................................................

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