Emc-Correct Electrical Installation - Danfoss VLT FC 101 Quick Manual

Installation

3.2.5 EMC-correct Electrical Installation

General points to be observed to ensure EMC-correct electrical installation:
•
Use only shielded/armored motor cables and shielded/armored control cables.
•
Ground the shield at both ends.
•
Avoid installation with twisted shield ends (pigtails), because it reduces the shielding effect at high frequencies.
Use the cable clamps provided.
•
Ensure the same potential between the frequency converter and the ground potential of PLC.
•
Use star washers and galvanically conductive installation plates.
PLC
PLC
Control cables
Mains-supply
L1
L2
L3
PE
Reinforced protective earth
Illustration 3.21 EMC-correct Electrical Installation
MG18A802
Quick Guide
Panel
Status Quick Main
Menu
Menu Menu
Com.
OK
On
Warn.
Alarm
Auto
Hand
Reset On
On
Minimum 16 mm (6 AWG)
2
equalizing cable
Minimum 200 mm (7.87 in)
between control
cable, mains cable
and between mains
motor cable
Danfoss A/S © 05/2016 All rights reserved.
Output con-
tactor
Grounding rail
Cable insula-
tion stripped
All cable entries in
one side of panel
Motor cable
Motor, 3 phases and
protective earth
3 3
19