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130BE232.11

Illustration 4.6 Mains, Motor, and Grounding Connection for

Single-phase Units

130BE231.11

Illustration 4.7 Mains, Motor, and Grounding Connection for 3-

phase Units (K1, K2, K3)

130BE804.10

Illustration 4.8 Mains, Motor, and Grounding Connection for 3-

phase Units (K4, K5)

4.7

AC Mains Connection

•

Size the wiring based on the input current of the

frequency converter. For maximum wire sizes, see

chapter 9.1 Electrical Data.

•

Comply with local and national electrical codes

for cable sizes.

Procedure

1. Connect the AC input power cables to terminals

N and L for single-phase units (see

Illustration 4.6), or to terminals L1, L2, and L3 for

3-phase units (see Illustration 4.7).

2. Depending on the conguration of the

equipment, connect the input power to the

mains input terminals or the input disconnect.

3. Ground the cable in accordance with the

grounding instructions in chapter 4.3 Grounding.

4. When supplied from an isolated mains source (IT

mains or oating delta) or TT/TN-S mains with a

grounded leg (grounded delta), ensure that the

RFI lter screw is removed. Removing the RFI

screw prevents damage to the DC link and

reduces ground capacity currents in accordance

with IEC 61800-3 (see Illustration 9.2, the RFI

screw is on the side of the frequency converter).

Electrical Installation

VLT

Midi Drive FC 280

Danfoss VLT Midi Drive FC 280 User Manual

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