Ac Mains Connection; Control Wiring; Control Terminal Types - Danfoss VLT AutomationDrive FC 301 Operating Instructions Manual

Electrical Installation
Illustration 4.5 Motor Connection
Illustration 4.6 shows mains input, motor, and grounding
for basic frequency converters. Actual configurations vary
with unit types and optional equipment.
Illustration 4.6 Example of Motor, Mains, and Ground Wiring
MG33AQ02
Operating Instructions

4.7 AC Mains Connection

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Procedure
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4.8 Control Wiring

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4.8.1 Control Terminal Types

Illustration 4.7 and Illustration 4.8 show the removable
frequency converter connectors. Terminal functions and
default settings are summarised in Table 4.2 and Table 4.3.
- LC -
Illustration 4.7 Control Terminal Locations
Danfoss A/S © 07/2015 All rights reserved.
Size the wiring based on 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.
Connect the 3-phase AC input power wiring to
terminals L1, L2, and L3 (see Illustration 4.6).
Depending on the configuration of the
equipment, connect the input power to the
mains input terminals or the input disconnect.
Ground the cable in accordance with the
grounding instructions provided in
chapter 4.3 Grounding.
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
parameter 14-50 RFI Filter is set to [0] Off to avoid
damage to the DC link and to reduce ground
capacity currents in accordance with IEC 61800-3.
Isolate the control wiring from the 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. See Illustration 4.7.
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