Introduction to Electrical Engineering

| Kategorie: Kniha  | Tento dokument chci!

Strana 4 z 112

Zobrazení indexu knihy

Jak získat tento dokument?

Poznámky redaktora

..............................4...........................................3.............................................................. General .................................2.........................70 7........84 9.............. Safety information electrical equipment and devices................. VERIFICATION ELECTRICAL EQUIPMENT AND INSTALLATION................................................6 Cross-section conductors.4......................1 Erection.9 Protection against overvoltage................................................... Coding indicating devices and actuators colours (IEC 73)..................................71 7..............................................................................2 Preservation electrical continuity protective conductors................61 6.............................................................61 6............................. Visual inspection..............12 Conditions installation.69 7..4 Selection electrical equipment.......................................2.................................. SAFETY SYMBOLS AND SAFETY IDENTIFICATION FOR USE ELECTRICAL EQUIPMENT ................................4............................................................................ Graphical symbols for use electrical equipment .............................................62 6.............................................................CONTENTS 5 6.....2.......................................................4....................................................5.....................2 Type wiring and methods installation ...............3 Terminals for protective conductors ....4 Safety signs ..........60 6................84 9........................................................74 7.......................................................79 8...................2..........................................................67 7...64 6.........................................3.68 7........1...................................... Selection and erection electrical equipment according external influences ................................................68 7......84 9. Proper installation protective conductor .......................................................................................................................63 6..................5 Examples safety signs........................... EXTERNAL INFLUENCES EFFECTING ELECTRICAL EQUIPMENT AND INSTALLATION ....................8 Protection against fault currents............3 Nature demand..................................................66 7.................................14 Accessibility electrical equipment...................1..............4.......4...............................................................4......3.........................................................................................1 Protection against direct contact...........................61 6.......................85 .............4...............................................3........62 6..................................................7 Protection against overcurrent ..5 Characteristics......................65 6..........................................................................................................................................13 Prevention mutual influence....60 6..............4..58 6....4.........64 6.............................................................11 Emergency control ....................................................1 Safety colours..........................................62 6.....................3.................67 7.....82 9..............4........................2.........................................3...72 7.......2 Marking actuators........................................................................ Testing..................................4........................................58 6...............64 6...............................2 Initial verification..........................................3............................1 Indicating devices ..........................65 6...................72 7..................................................70 7......3.................................3 Colours actuators...........................64 6...............64 6...........3...................................4................3....................................................4................................2 Protection against indirect contact..........60 6.......... Erection and initial verification electrical installations....74 8....1........................4..............................69 7........................................10 Disconnecting devices ..............................1............................4..........4..................3 Geometric form and meaning safety signs ...................................................................3.......................................................................................................................65 6.................................76 8................................................ Proper installation electrical equipment................5... Identification conductors and terminals..................................................................................................1 Protection against thermal effects...................................64 6..1.............1 PEN conductor....................................4......................4......2 Example use safety colours and contrast colours...................... Climate .............................................65 6....................5.............58 6.......

---

---