ABB ACS880-204, Руководство по оборудованию

Страница: 126 / 404

2. Lead the cables into the inside of the cabinet. 360° grounding of the cable shield at the
lead-through is recommended to suppress interference.
3. Twist the cable shields to bundles and connect to the cabinet PE (ground) busbar.
Connect the separate ground conductors/cables to the cabinet PE (ground) busbar.
4. Connect the phase conductors to the input terminals of the main switch-disconnector
[Q1]. For tightening torques, see
Cabinet design and construction instructions for ACS880
multidrive modules (3AUA0000107668 [English]).
5. Connect the output terminals of the main switch-disconnector) [Q1] to the main fuses
[F1.x].
6. Connect the main fuses [F1.x] to the main contactor [Q2] input terminals.
7. Connect the contactor [Q2] output terminals to the AC busbars of the filter in the
supply/rectifier unit cabinet by cabling, busbars or equivalent.
8. Inside the supply/rectifier unit cabinet, push the R8i module into the quick connectors.
LCL filter module of type BLCL-1x-x: Push the LCL filter module into the quick connectors.
LCL filter module of type BLCL-2x-x: Remove the fan of the LCL filter module (see the
instructions in chapter Maintenance). Push the LCL filter module into its place. Connect
the filter output busbars (behind the filter module) to the busbars on the cabinet frame.
Reinstall the fan of the LCL filter module.
9. Ground the modules:
• Ground the modules by the top edge of the front plate. The grounding point is
marked on the module. Connect the front plate to the frame support bracket 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 (such as with, Rittal VX25 enclosures), it is important to
make sure that 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]).
10. Connect the DC busbars of the rectifier module into the cabinet common DC busbars.
3
50%
2
Note that figure 2 is an example of a cable lead-through that has to be acquired by the customer.
126 Electrical installation