Ac Mains Connection; Mains Connection For A2 And A3 - Danfoss VLT FC 103 Operating Instructions Manual

Installation

2.4.5 AC Mains Connection

• •
Size wiring based upon the input current of the
frequency converter. For maximum wire sizes see
10.1 Power-dependent Specifications.
•
Comply with local and national electrical codes
for cable sizes.
•
Connect 3-phase AC input power wiring to
terminals L1, L2, and L3 (see Illustration 2.18).
•
Depending on the configuration of the
equipment, input power will be connected to the
mains input terminals or the input disconnect.
Illustration 2.18 Connecting to AC Mains
•
Ground the cable in accordance with grounding
instructions provided in 2.4.2 Earth (Grounding)
Requirements
•
All frequency converters may be used with an
isolated input source as well as with ground
reference power lines. When supplied from an
isolated mains source (IT mains or floating delta)
or TT/TN-S mains with a grounded leg (grounded
delta), set 14-50 RFI Filter to [0] Off. When off, the
internal RFI filter capacitors between the chassis
and the intermediate circuit are isolated to avoid
damage to the intermediate circuit and to reduce
earth capacity currents in accordance with IEC
61800-3.

2.4.5.1 Mains Connection for A2 and A3

1. Mount the two screws on the mounting plate
2. Slide the mounting plate into place and tighten
fully
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VLT Refrigeration Drive FC 103 1.1-90 kW Operating Instructions
Illustration 2.19 Mounting Plate Position
Illustration 2.20 Earth Cable Mounting
MG16E202 - VLT® is a registered Danfoss trademark
3. Mount and tighten earth cable
2 2
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