Connection Of Han 10E Motor Plug For T73; Parallel Connection Of Motors - Danfoss VLT Decentral FCD 300 Operating Instructions Manual

2 Installation

2.5.7 Connection of HAN 10E Motor Plug for T73

HAN 10E pin no 1 - Motor phase U
HAN 10E pin no 2 - Motor phase V
2
HAN 10E pin no 3 - Motor phase W
HAN 10E pin no 4 - Motor brake, see
04.BX.YY
, terminal 122
HAN 10E pin no 5 - Motor brake, see
04.BX.YY
, terminal 123
HAN 10E pin no 9 - Motor thermistor, see
MG.04.BX.YY
, terminal 31A
HAN 10E pin no 10 - Motor thermistor, see
tions MG.04.BX.YY
PE = protective earth

2.5.8 Parallel Connection of Motors

The frequency converter is able to control several motors connected in
parallel. If the motors are to have different rpm values, use motors with
different rated rpm values. Motor rpm is changed simultaneously, which
means that the ratio between the rated rpm values is maintained across
the range. The total current consumption of the motors is not to exceed
the maximum rated output current I
Problems may arise at the start and at low rpm values if the motor sizes are widely different. This is because the small motors' relatively high ohmic
resistance in the stator calls for a higher voltage at the start and at low rpm values.
In systems with motors connected in parallel, the electronic thermal relay (ETR) of the frequency converter cannot be used as motor protection for the
individual motor. For this reason further motor protection must be used, e.g. thermistors in each motor (or an individual thermal relay).
NB!
Parameter 107
teristic
must be set to
20
Operating Instructions MG.
Operating Instructions MG.
Operating Instructions
Operating Instruc-
, terminal 31B
for the frequency converter.
INV
Automatic motor tuning, AMT
cannot be used when motors are connected in parallel. Parameter 101
Special motor characteristics
MG.04.B8.02 - VLT is a registered Danfoss trademark
[8] when motors are connected in parallel.
VLT® Decentral FCD
Torque charac-