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Siemens 1LA8 Operating Instructions Manual Page 7

Simotics tn series n-compact induction motor.
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6.4.5
Use of aluminum conductors.......................................................................................................74
6.4.6
Using single-stranded cables......................................................................................................75
6.4.7
Internal equipotential bonding.....................................................................................................75
6.4.8
Stepless mating face for sealing in the terminal box cover (not for GT640)................................75
6.4.9
Minimum air clearances..............................................................................................................76
6.4.10
Finishing connection work...........................................................................................................76
6.5
Connecting the auxiliary circuits..................................................................................................76
6.5.1
Selecting cables..........................................................................................................................76
6.5.2
Bringing cables into the auxiliary terminal box and routing them................................................77
6.5.3
Connect metal shield in the terminal box ...................................................................................78
6.5.4
Connecting temperature monitoring for the stator winding..........................................................78
6.5.5
Terminating the connection work (auxiliary circuit).....................................................................79
6.5.6
Converter operation.....................................................................................................................79
6.5.6.1
Operation on a converter with a low pulse frequency.................................................................80
6.5.6.2
Converter peak voltage...............................................................................................................80
6.5.6.3
Reducing bearing currents..........................................................................................................81
6.5.6.4
Converter operation on a grounded network...............................................................................82
7
Start-up.......................................................................................................................................................83
7.1
Checks to be carried out prior to commissioning .......................................................................83
7.2
Measurement of the insulation resistance and polarization index before commissioning...........84
7.3
Greasing the roller bearings prior to commissioning...................................................................85
7.4
Setpoint values for monitoring the bearing temperature.............................................................86
7.5
Set values for monitoring the winding temperature.....................................................................86
7.6
Power on.....................................................................................................................................87
7.7
De-energizing..............................................................................................................................87
8
Operation....................................................................................................................................................89
8.1
Safety guidelines in operation.....................................................................................................89
8.2
Machine overheating caused by dust..........................................................................................90
8.3
Operation in hazardous areas.....................................................................................................91
8.4
Switching off the anti-condensation heating................................................................................92
8.5
Switching on the machine...........................................................................................................92
8.6
Regreasing roller bearings..........................................................................................................92
8.7
Switching on again after an emergency switching-off.................................................................92
8.8
Stoppages...................................................................................................................................92
8.8.1
Avoidance of condensation or formation of condensation within the machine............................94
8.8.2
Avoidance of damage to roller bearings during stoppages.........................................................94
8.8.3
Shaft grounding brushes (optional).............................................................................................95
8.8.4
Measurement of the insulation resistance after an extended stoppage......................................95
8.9
Decommissioning the machine...................................................................................................96
8.10
Re-commissioning the machine..................................................................................................96
8.11
faults............................................................................................................................................96
8.11.1
Inspections in the event of faults.................................................................................................96
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014
Table of contents
7

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