40
TXP Inst. & Maint. Manual: IM-825
A star circuit is required for the following
fans:
•
Indication of the interconnection on
the power plate
•
e.g.. when specified on the
230/400V or / power plate
/
,
the motor may only be connected
for the high voltage (400V, three-
phase current!) in the
be con-
nected.
If the direction of rotation is incorrect,
check that L1 and L3 are reversed.
5.5.3 Frequency converter
operation
Important information on pa-
rameterization
Frequency inverters supplied by
TCF are already configured for
communication with the motor.
No settings are necessary.
Requirements for customer-owned
frequency inverters
•
Inverter power equal to or greater
engine power *)
•
Inverter current equal to or greater
motor current *)
•
Output voltage of the inverter equal
to the motor rated voltage
•
Supply voltage max. 480V (includ-
ing +5% voltage tolerance)
•
The pulse rate of the inverter
should be 8 kHz, as a lower pulse
frequency produces strong motor
noises
•
The frequency converter must con-
tain an overload protection.
•
The values for the maximum/mini-
mum frequencies must be observed
•
The inverter must have a connec-
tion for temperature sensors (PTC
thermistor) or a temperature guard
(opener contact)
*) Values see performance plate
The motor can be operated in triangular
or star switching, depending on the in-
put voltage of the inverter.
Set the following U/f assignment on the
frequency inverter:
Fig. 27: U/f assignment on the inverter
f
B
and U
B
See performance plate
Forbidden Area
In case of non-observance, the motor
current increases disproportionately and
the drive motor does not come to rated
speed.
