6 Electrical connection...................................................................................................................................63
6.1 Safety instructions relating to the electrical connection .........................................................63
6.2 Basic rules..............................................................................................................................64
6.3 Route the cable with an appropriate loop so that water can drip off ......................................65
6.4 Terminal box ..........................................................................................................................65
6.4.1 TB3R61 terminal box .............................................................................................................66
6.4.2 Terminal box 1XB1631...........................................................................................................67
6.4.3 Terminal box 1XB7750...........................................................................................................67
6.4.4 Rotating the terminal box (option) ..........................................................................................68
6.4.5 Removing/attaching the terminal box cover ...........................................................................69
6.4.6 Connection without terminal box ............................................................................................69
6.5 Connecting the machine ........................................................................................................70
6.5.1 Selecting cables .....................................................................................................................70
6.5.2 Terminal marking ...................................................................................................................71
6.5.3 Connecting the machine for a specific direction of rotation....................................................71
6.5.4 Connecting protruding cables ................................................................................................71
6.5.5 Certified cable entries, thread adapters and sealing plugs ....................................................72
6.5.6 Undrilled entry plate ...............................................................................................................72
6.6 Grounding conductor..............................................................................................................73
6.6.1 Connecting the grounding conductor .....................................................................................74
6.6.2 Ground the metal shield in the terminal box...........................................................................76
6.7 Conductor connection ............................................................................................................76
6.7.1 Inserting the cable into the terminal box ................................................................................76
6.7.2 Laying cables .........................................................................................................................77
6.7.3 Connecting cables with cable lugs .........................................................................................77
6.7.4 Connecting cables without cable lugs ....................................................................................79
6.7.5 Using single-stranded cables .................................................................................................80
6.7.6 Use of aluminum conductors..................................................................................................81
6.7.7 Minimum air clearances .........................................................................................................81
6.7.8 Connection using saddle terminals .......................................................................................82
6.8 Finishing connection work......................................................................................................82
6.9 Connecting the auxiliary circuits.............................................................................................83
6.9.1 Selecting cables .....................................................................................................................83
6.9.2 Bringing cables into the auxiliary terminal box and routing them ...........................................83
6.9.3 Connecting temperature monitoring for the stator winding (depending on the particular
version) ..................................................................................................................................84
6.9.4 Intrinsically safe circuits for sensors or probes ......................................................................84
6.9.5 Finishing connection work......................................................................................................85
6.10 Connecting the converter .......................................................................................................85
6.10.1 Radio-frequency grounding for converter operation...............................................................86
7 Commissioning ...........................................................................................................................................89
7.1 Measures before start-up .......................................................................................................89
7.2 Measuring the insulation resistance and polarization index...................................................91
7.3 Setpoint values for monitoring the bearing temperature ........................................................92
Table of contents
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A 5
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