Ac Mains Connection; Control Wiring - Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual

Electrical Installation
4 4
Illustration 4.5 Motor Connection
Illustration 4.6 represents mains input, motor, and earth
grounding for basic frequency converters. Actual configu-
rations vary with unit types and optional equipment.
Illustration 4.6 Example of Motor, Mains and Ground Wiring
16
Operating Instructions

4.7 AC Mains Connection

Procedure

4.8 Control Wiring

- LC -
Danfoss A/S © Rev. 2014-02-06 All rights reserved.
•
Size wiring based upon the input current of the
frequency converter. For maximum wire sizes see
chapter 8.1 Electrical Data.
•
Comply with local and national electrical codes
for cable sizes.
1. Connect 3-phase AC input power wiring to
terminals L1, L2, and L3 (see Illustration 4.6).
2. Depending on the configuration of the
equipment, input power is connected to the
mains input terminals or the input disconnect.
3. Ground the cable in accordance with grounding
instructions provided in chapter 4.3 Grounding.
4. When supplied from an isolated mains source (IT
mains or floating delta) or TT/TN-S mains with a
grounded leg (grounded delta), ensure that
14-50 RFI Filter is set to [0] Off to avoid damage to
the intermediate circuit and to reduce earth
capacity currents in accordance with IEC 61800-3.
•
Isolate control wiring from high power
components in the frequency converter.
•
When the frequency converter is connected to a
thermistor, ensure that the thermistor control
wiring is screened and reinforced/double
insulated. A 24 V DC supply voltage is
recommended.
MG16E302