88 Electrical installation
Connection procedure
WARNING! Obey the instructions in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
1. Do the steps in section Precautions before electrical work before you start the work.
2. Open the door of the incoming cubicle (ICU).
3. Remove the shrouding covering the input terminals.
4. Peel off 3 to 5 cm of the outer insulation of the cables above the lead-through plate for
360° high-frequency grounding.
5. Prepare the ends of the cables.
6. If fire insulation is used, make an opening in the mineral wool sheet according to the
diameter of the cable.
7. For IP22, IP42 drives:
Slide the cables through the lead-throughs with the conductive
sleeves.
8. For IP54 drives:
Remove the rubber grommets from the lead-through plate for the
cables to be connected. Cut adequate holes into the rubber grommets. Slide the
grommets onto the cables. Slide the cables through the lead-throughs with the
conductive sleeves and attach the grommets to the holes.
9. Fasten the conductive sleeves to the cable shields with cable ties.
10. Seal the slot between the cable and mineral wool sheet (if used) with sealing
compound.
11. Tie up the unused conductive sleeves with cable ties.
12. Connect the twisted shields of the cables to the PE busbar of the cabinet.
13. Connect the phase conductors of the input cable to the L1, L2 and L3 terminals. (With
12-pulse connection, the terminals are 1L1, 1L2 and 1L3 for one 6-pulse supply line,
2L1, 2L2 and 2L3 for the other.).
14. Reinstall the shrouding removed earlier.
15. Close the door.
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