Installation manual

46
Electromagnetic compatibility, wiring
Electromagnetic compatibility
Principle
• Grounds between drive, motor and cable shielding must have “high-frequency” equipotentiality.
• Use of shielded cables with shielding connected to ground at both ends for the motor cables, braking resistor (if used) and control-signal wiring.
Metal ducting or conduit can be used for part of the shielding length provided that there is no break in continuity.
• Ensure maximum separation between the power supply cable (line supply) and the motor cable.
Installation diagram
ATV71H 037M3 to D15M3X and ATV71H 075N4 to D18N4
• Attach and ground the shielding of cables 4 and 5 as close as possible to the drive:
- Strip the shielding.
- Use stainless steel metal clamps on the parts from which the shielding has been stripped, to attach them to the metal plate 2.
The shielding must be clamped tightly enough to the metal plate to ensure correct contact.
• Install the control EMC plate 11 on the sheet steel grounded plate 2, as shown in the diagram.
• Attach and ground the shielding of cables 7, 12 and 13 as close as possible to the drive:
- Strip the shielding.
- Use stainless steel metal clamps on the parts from which the shielding has been stripped, to attach them to the control EMC flange 9.
The shielding must be clamped tightly enough to the metal plate to ensure correct contact.
1 Altivar 71
2 Sheet steel grounded plate supplied with the drive
3 Tapped holes for installing the control EMC plate
4 Shielded cable for motor connection, with shielding connected to ground
at
both ends. The shielding must be continuous and intermediate terminals
must be in EMC shielded metal boxes.
5 Shielded cable for connecting the braking resistor (if used). The shielding
must be continuous and intermediate terminals must be in EMC shielded
metal
boxes.
6 Non-shielded wires for relay contact output
7 Shielded cables for connecting the Power Removal safety function input.
The shielding must be continuous and intermediate terminals must be in
EMC
shielded metal boxes.
8 Metal clamps
9 Protective ground connection
10 Unshielded power supply cable or wires
11 Control EMC plate
12 Shielded cables for connecting the control-signal section. For applications
requiring several conductors, use cables with a small cross-section
(0.5
mm
2
- AWG 20).
13 Shielded cables for connecting the encoder. The shielding must
be
continuous and intermediate terminals must be in EMC shielded
metal
boxes.
Note:
• If using an additional input filter, it should be installed under the drive and connected directly to the line supply via an unshielded cable.
Link 10 on the drive is then established via the filter output cable.
• The HF equipotential ground connection between the drive, motor and cable shielding does not remove the need to connect the
PE
protective conductors (green-yellow) to the appropriate terminals on each unit.
1
2
5
4
10
3
6
12
7
11
13
8
9