ABB ACS880-1604, Руководство по оборудованию

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70 Electrical installation

Connection procedure for power connections inside the DC/DC
converter cubicle
For the cable types, see Electrical planning instructions for ACS880 multidrive cabinets
and modules (3AUA0000102324 [English]).
For the filter connections, see Internal circuit diagram for the BDCL filter on page 74 .
WARNING! Repeat the steps described in section Electrical safety
precautions on page 66 . The complete safety instructions are given in
Safety instructions for ACS880 multidrive cabinets and modules
(3AUA0000102301 [English]). If you ignore them, injury or death, or
damage to the equipment can occur.
WARNING! With aluminum cables, apply grease to stripped 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.
1. Repeat the steps described in section Electrical safety precautions on page 66 .
2. Open the door of the DC/DC converter cubicle and remove the shrouding (if any).
3. Make the connections in between the main circuit components inside the cabinet if not
done yet. Do the connections according to the final circuit diagrams for the drive. If the
connections are ready, check them against the final circuit diagrams. Do not use the
example circuit diagrams in this manual as the sole source of information when doing
or checking the connections.
For the tightening torques, see
Tightening torques on page 154 .
4. Ground the modules by the top edge of the front plate. The grounding point is marked
on the module (a). Connect the front plate to the frame support bracket (b) with
screws. The frame support bracket should have a galvanic connection to the PE
busbar through the cabinet frame.
Note: If the cabinet frame is painted (for example, Rittal TS 8 enclosures), it is
important to make sure that a good galvanic connection to ground (PE busbar) is
achieved. You can, for example, remove the paint from the connection points and use
star washers.
Note: The connection to ground merely through the mounting screws and the cabinet
chassis is not always good enough. To ensure the continuity of the protective bonding
circuit, you can connect the modules to the cabinet PE busbar with a copper busbar or
cable. The inductance and impedance of the PE conductor must be rated according to
permissible touch voltage appearing under fault conditions (so that the fault point
voltage will not rise excessively when a ground fault occurs). See
Electrical planning
instructions for ACS880 multidrive cabinets and modules (3AUA0000102324
[English]).