•
Construct sufficient high-frequency grounding network in the cabinet to avoid voltage
differences and forming of high-impedance radiator structures. A good high-frequency
grounding is made with short flat copper braids for low inductance. One-point
high-frequency grounding cannot be used due to the long distances inside the cabinet.
•
360° high-frequency grounding of the cable shields at the cable entries improves the
EMC shielding of the cabinet.
•
ABB recommends 360° high-frequency grounding of the motor cable shields at their
entries. The grounding can be implemented by a knitted wire mesh screening as shown
below.
3
1
6
4
5
2
Cable
1
Cable tie
2
Strain relief
3
Bare cable shield
4
Knitted wire mesh
5
Cabinet entry plate
6
•
ABB recommends 360° high-frequency grounding of the control cable shields at their
entries. The shields can be grounded by means of conductive shielding cushions pressed
against the cable shield from both directions as shown below.
3
4
5
1
1
2
2
2
Tightening screw
1
EMI conductive cushion
2
Strain relief
3
Grommet
4
Entry plate
5
46 Generic cabinet planning instructions
Summary of Contents for ACS880-04FXT
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 04FXT drive module packages Hardware manual ...
Page 2: ......
Page 4: ......
Page 40: ...40 ...
Page 54: ...54 ...
Page 82: ...82 ...
Page 86: ...M10 86 Electrical installation ...
Page 106: ...106 ...
Page 118: ...118 ...
Page 122: ...122 ...
Page 132: ...132 ...
Page 136: ...136 ...
Page 158: ...158 ...
Page 160: ...Standard configuration IP00 UL Type Open 160 Dimension drawings ...
Page 161: ...Drive module with optional support brackets IP00 UL Type Open Dimension drawings 161 ...
Page 163: ...Mounting plate opening 3AXD50000038119 Dimension drawings 163 ...
Page 164: ...3AXD50000038119 164 Dimension drawings ...
Page 182: ... Declaration of conformity 182 The Safe torque off function ...
Page 183: ...The Safe torque off function 183 ...
Page 184: ...184 ...