ABB ACS880-07LC, Руководство по оборудованию

Страница: 90 / 222

￭ Procedure
Refer to the drawings below.
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 Electrical safety precautions (page 16) before you start the work.
2. Open the inverter module cubicle door.
3. Remove the shrouding at the lower part of the cubicle (not shown).
4. Unplug the wiring from the lower front mounting plate. Remove the plate.
5. Disconnect the wiring from the cooling fans.
6. Undo the two retaining screws (a) of each fan.
7. Pull each fan outwards to separate them from the heat exchanger housing.
8. Remove the inner shroud.
9. Peel off 3 to 5 cm (1.2 to 2 inches) of the outer insulation of the cables above the
lead-through plate for 360° high-frequency grounding.
10. Prepare the ends of the cables.
WARNING!
Apply grease to stripped aluminum conductors before attaching them to
non-coated aluminum cable lugs. Obey the grease manufacturer's instructions.
Aluminum-aluminum contact can cause oxidation in the contact surfaces.
11. If fire insulation is used, make an opening in the mineral wool sheet according to the
diameter of the cable.
12. Remove the rubber grommets from the cable entries for the cables to be connected.
Cut adequate holes into the rubber grommets. Slide the grommets onto the cables.
Slide the cables into the cubicle through the conductive sleeves and attach the grommets
to the holes.
13. Attach the conductive sleeves to the cable shields with cable ties. Tie up the unused
conductive sleeves with cable ties.
14. Connect the twisted shields of the cables to the PE busbar of the cabinet.
15. Connect the phase conductors of the cables to the appropriate terminals. Tighten the
screws to the torque given under Tightening torques (page 185) .
16. Refit the inner shroud.
17. With each fan, align the guide pins (b) at the rear of the fan cowling with the slots (c) in
the module bottom guide, then reinstall the retaining screws (a).
18. Refit the lower front mounting plate. Reconnect the wiring to the components on the
mounting plate.
19. Refit the outer shroud.
20. Make sure there are no tools, debris or any other foreign objects in the cubicle. Close
the cubicle door.
21. At the motor, connect the cables according to instructions from the motor manufacturer.
Pay special attention to the phase order. For minimum radio-frequency interference,
ground the cable shield 360 degrees at the cable entry of the motor terminal box, or
ground the cable by twisting the shield so that the flattened shield is wider than 1/5 of
its length.
90 Electrical installation