Application Manual CDA3000
6-11
6 Control modes
1
2
3
4
5
6
A
DE
EN
FR
87 Hz characteristic for expanded manipulating range
The operating range with constant torque of a 400 V / 50 Hz motor in star
configuration can be expanded to 87 Hz in delta configuration.
Note: It should be checked whether the motor is adequate to the
load (400 V / ∆ at 87 Hz), since the motor can be run above
its rated power. Only the motor manufacturer can give precise
information.
Example: Expanded manipulating range based on 87 Hz charac-
teristic
1. Motor data taken from rating plate
− Motor type: Asynchronous motor
− Rated power: 4 kW
− Rated speed: 1420 rpm
− Rated voltage: 230 V / 400 V
− Configuration: ∆ /Y
2. Change motor circuitry on terminal board
− Change motor from star configuration (400 V / Υ) to delta config-
uration (230 V / ∆).
3. Adapt power output of inverter module
− As a result of the changed configuration of the motor (400 V / ∆)
the power of the inverter module must be adjusted.
Condition:
Selected inverter module: CDA34.017 (rated power 7.5 kW)
4. Adapt specification of motor data in “Initial commissioning” subject
area.
a) 154-MOPNM = P
n50Hz
x
b) 155-MOVNM = 400 V
c) 156-MOFN = 87 Hz
d) 157-MOSNM = n
n50Hz
x
e) 158-MOCNM = I
∆Motor
P
Inverter
P
Motor
3⋅≥ P
Inverter
4kW 1 73,⋅()=
3
3
To Next Page
Loading...
