Introduction to Electrical Engineering

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.................................5 Automatic disconnection supply........................................ 100 12................................................................................................................1 General ..............2 Preventing unauthorised and unintentional switching -on ............................ 85 9....................... Operational status ........... Test laboratories and experimental stations.......3................................................................ 102 13....................... OPERATION ELECTRICAL INSTALLATIONS.................................................. Test procedure.......................................3...................................................1 Continuity the protective conductors, including the main and supplementary equipotential bonding...3.. 87 10.......................... 97 11................3............ Vocabulary ................................................................................................ 104 14......................................... Electrical test equipment...............................................2 Insulation resistance the electrical installation..........................3.......... 94 11... Electrical work activities school laboratories .................... 88 10.................................................................................................3.... Test stations with automatic protection against direct contact .......... 95 11........3............................................3.................................................................................................. 96 11......................... 91 11.....3................ 96 11......................................................... 91 10.............1 Emergency switching off.................. Test stations without automatic protection against direct contact ............ 98 11............1.4 Protection against residual voltages and transfer voltages........ 89 10............................................................................1... 97 11....................... 98 11..7............ 99 11.. 93 11...............................6.... 108 .............................................................................................CONTENTS 6 9............. 107 15........................................................................ Occupational Safety and Health Regulations .... Personnel..3..........................................................................................10.......................7................................................................ Standard operational procedures................................... 95 11....................................4 Polarity test....................... 95 11......... Bibliography...... FIRST AID TREATMENT THE ELECTRIC SHOCK .............................. 86 9..3 Protection separation circuits (electrical separation).........................................4.................. 85 9...2 Personnel ........... 96 11............ 90 10.......................................... 86 9......................................................................................... Working procedures..............................6 Measurement the resistance protective conductors............................. Maintenance procedures ............................................. Protection against electric shock.........................................7........... ERECTION AND OPERATION ELECTRICAL TEST EQUIPMENT..........2.......................3.......... 93 11................ 97 11.......................................................................4..........................................................................................................................5...................3 Preventing automatic energizing ............................8...... Preparation tests, switching operations test stations......3...............2.............................. 86 9. Operation test equipment.............9. 96 11....

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