Configuration Manual AC Induction Motors 1PH4 - Siemens ...

Motor Description
1.8 Electrical connections
1-28
Note
The cables are available in a UL version or for higher mechanical requirements.
Technical data, refer to Catalog NC Z.
Connecting–up information
!
Note
The overall system compatibility is only guaranteed when using shielded power
cables.
Shields must be incorporated in the protective grounding concept. Protective
ground should be connected to conductors that are open–circuit and that are not
being used and also electrical cables that can be touched. If the brake feeder
cables in the SIEMENS cable accessories are not used, then the brake conductor
cores and shields must be connected to the cabinet ground (open–circuit cables
result in capacitive charges!).
Warning
� Before carrying out any work on the AC motor, please ensure that it is
powered–down and the system is locked–out so that the motor cannot re–start!
� Please observe the rating plate data and circuit diagram in the terminal box.
� Twisted or three–core cables with additional ground conductor should be used
as motor feeder cables. The insulation should be removed from the ends of the
conductors so that the remaining insulation extends up to the cable lug or terminal.
� The connecting cables should be freely arranged in the terminal box so that the
protective conductor has an overlength and the cable conductor insulation cannot
be damaged. Connecting cables should be appropriately strain relieved.
� Please ensure that the following minimum air distances are maintained: Supply
voltages up to 500 V: Minimum air distance 4.5 mm
� After connecting up, the following should be checked:
– The inside of the terminal box must be clean and free of any cable pieces
– All of the terminal screws must be tight
– The minimum air distances must be maintained
– The cable glands must be reliably sealed
© Siemens AG 2003 – 2006 All rights reserved
AC Induction Motors, 1PH4 (APH4) – 04.06 Edition