Emc-Compliant Electrical Installation - Danfoss VLT HVAC Basic Drive FC 101 Design Manual

Installation
5 5
Illustration 5.14 Relays on Enclosure Size I6
IP54, 380–480 V, 22–37 kW (30–50 hp)
Enclosure sizes I7, I8
Illustration 5.15 Enclosure Sizes I7, I8
IP54, 380–480 V, 45–55 kW (60–70 hp)
IP54, 380–480 V, 75–90 kW (100–125 hp)
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VLT
88 89
DC-
DC+
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96
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L1 98
L2
L3
U
V
W
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HVAC Basic Drive FC 101

5.1.3 EMC-compliant Electrical Installation

Pay attention to the following recommendations to ensure
EMC-correct electrical installation.
•
Use only shielded/armored motor cables and
shielded/armored control cables.
•
Connect the shield to ground at both ends.
•
Avoid installation with twisted shield ends
(pigtails), because this may affect the shielding
effect at high frequencies. Use the cable clamps
provided instead.
•
It is important to ensure good electrical contact
from the installation plate through the installation
screws to the metal cabinet of the frequency
converter.
•
Use starwashers and galvanically conductive
installation plates.
•
Do not use unshielded/unarmored motor cables
in the installation cabinets.
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R- R+
MG18C702