Relay Output; Parallel Connection Of Motors - Danfoss FC 300 Design Manual

FC 300 Design Guide

Relay Output

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Relay 1
Terminal 01: common
•
Terminal 02: normal open 240 V AC
•
Terminal 03: normal closed 240 V AC
•
Relay 2 (FC 302 only)
Terminal 04: common
•
Terminal 05: normal open 400 V AC
•
Terminal 06: normal closed 240 V AC
•
Relay 1 and relay 2 are programmed in par.
5-40, 5-41, and 5-42.
Additional relay outputs by using option
module MCB 105.

Parallel Connection of Motors

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The adjustable frequency drive can control
several parallel-connected motors. The total
current consumption of the motors must not
exceed the rated output current I
adjustable frequency drive.
This is only recommended when U/f is
selected in par. 1-01.
NOTE
When motors are connected in parallel,
par. 1-29 Automatic Motor Adaptation
(AMA) cannot be used, and par. 1-01
Motor Control Principle must be set to Special
motor characteristics (U/f).
Problems may arise at start and at low RPM values if motor sizes are widely different because, for small motors,
the relatively high ohmic resistance in the stator calls for a higher voltage at start and at low RPM values.
116
How to Install
for the
INV
MG.33.B6.22 - VLT is a registered Danfoss trademark