Introduction to Electrical Engineering

| Kategorie: Kniha  | Tento dokument chci!

Strana 4 z 112

Zobrazení indexu knihy

Jak získat tento dokument?

Poznámky redaktora

........70 7............4........................................................13 Prevention mutual influence......................74 8................12 Conditions installation.........................................................11 Emergency control .......................... Proper installation electrical equipment..................64 6....... Climate ....................................... VERIFICATION ELECTRICAL EQUIPMENT AND INSTALLATION..........................................................................2 Protection against indirect contact...............................65 6.........................3 Geometric form and meaning safety signs ........................60 6........................................................ EXTERNAL INFLUENCES EFFECTING ELECTRICAL EQUIPMENT AND INSTALLATION ...............1 Protection against thermal effects...........70 7........................................1 Protection against direct contact..........................................................................................................2....................5....2.......................2 Marking actuators....................71 7...............................................................................................................................................................4..............4............3..................... Proper installation protective conductor ...................................................................................4..............................................14 Accessibility electrical equipment.............9 Protection against overvoltage..1..............................................................................................................................10 Disconnecting devices .................................1 Indicating devices .............................. Visual inspection.............69 7....................................64 6.........62 6...........................................3......................................3 Nature demand..................3.........3....................................................................61 6.4....67 7.......................... Identification conductors and terminals.........58 6......5....................................... Selection and erection electrical equipment according external influences .. Coding indicating devices and actuators colours (IEC 73)...........................................................4..........................2 Initial verification...................................3....7 Protection against overcurrent ....................................................................2 Preservation electrical continuity protective conductors..............4.................2....................67 7......................................1.......................................................................................5...4 Selection electrical equipment..............................74 7.......................85 ...84 9........3...................................................................4............72 7..............6 Cross-section conductors......................63 6.....5 Characteristics....................................4.....................................4.............................................................62 6..................... SAFETY SYMBOLS AND SAFETY IDENTIFICATION FOR USE ELECTRICAL EQUIPMENT .....................................68 7.....................................................................4.64 6.........................................1 PEN conductor................................................................................................................................................84 9..............2 Example use safety colours and contrast colours.........................4......................5 Examples safety signs.....................2.................58 6...................................................72 7.......................................................64 6.........................................3.3..69 7..................................79 8.........................1.................. Erection and initial verification electrical installations..................................................................8 Protection against fault currents..4........65 6.1 Erection.............4 Safety signs .....82 9.........4.......................76 8.................. Safety information electrical equipment and devices.......................2..................................4.....60 6...... General ................................................1...3 Colours actuators..........................2 Type wiring and methods installation ...................................................61 6.........................................................................4...............................................................................................66 7......................................58 6.84 9...60 6...................................68 7.......................................................................1...........3...........62 6.....1 Safety colours........................65 6..3 Terminals for protective conductors ...........CONTENTS 5 6.......................................................................64 6....61 6.4................. Testing....................4.. Graphical symbols for use electrical equipment ....................................64 6...........................................................3.................................65 6........................................3.....4......

---

---