Tightening Torques; Cooling And Degrees Of Protection - ABB ACS800-U4 Hardware Manual

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Tightening torques

The following table applies to zinc and chrome platings, and grade 8.8 screws (with
or without joint compound).
Screw size
M5
M6
M8
M10
M12
M16

Cooling and degrees of protection

The cabinet must have enough free space for the components to ensure sufficient
cooling. Observe the minimum clearances given for each component.
The air inlets and outlets must be equipped with gratings that
• guide the air flow
• protect against contact
• prevent water splashes from entering the cabinet.
The drawing below shows two typical cabinet cooling solutions. The air inlet is at the
bottom of the cabinet, while the outlet is at the top, either on the upper part of the
door or on the roof.
Cabinet assembly planning
Torque
Soft aluminium
Nm lbf ft
3.5 2.6
6 4.4
17 12.5
35 25.8
55 40.6
130 95.9
Air outlet
Air inlet
Alloyed aluminium and
copper
Nm lbf ft
3.5 2.6
9 6.6
20 14.8
40 29.5
70 51.6
180 132.8