ABB ACS880-14, Hardware Manual

Page: 46 / 248

Place the control board(s) away from:
• main circuit components such as contactors, switches and power cables
• hot parts (heatsink, air outlet of the drive module).
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Grounding of mounting structures
Arrange the grounding of the module by leaving the contact surfaces of the fastening points
unpainted (bare metal-to-metal contact). The module frame is grounded to the PE busbar
of the cabinet via the fastening surfaces, screws and the cabinet frame. Alternatively, use
a separate grounding conductor between the PE terminal of the module and the PE busbar
of the cabinet.
Ground also the other components in the cabinet according to the principle above.
￭
Busbar material and joints
ABB recommends tin-plated copper, but aluminum can also be used.
Note: Before joining aluminum busbars, remove the oxide layer and apply suitable
anti-oxidant joint compound.
￭
Shrouds
The installation of shrouds (touch protection) to fulfill applicable safety regulations is the
responsibility of the drive system builder.
Ready-made shrouding parts are available from ABB for some cabinet designs, see the
ordering information.
￭
Tightening torques
Unless a tightening torque is specified in the text, the following torques can be used.
Electrical connections
Strength class Torque Size
4.6...8.8 0.5 N·m (4.4 lbf·in) M3
4.6...8.8 1 N·m (9 lbf·in) M4
8.8 4 N·m (35 lbf·in) M5
8.8 9 N·m (6.6 lbf·ft) M6
8.8 22 N·m (16 lbf·ft) M8
8.8 42 N·m (31 lbf·ft) M10
8.8 70 N·m (52 lbf·ft) M12
8.8 120 N·m (90 lbf·ft) M16
Mechanical connections
Strength class Max. torque Size
8.8 6 N·m (53 lbf·in) M5
8.8 10 N·m (7.4 lbf·ft) M6
8.8 24 N·m (17.7 lbf·ft) M8
46 Generic cabinet planning instructions