4
3. Application notes
A. Concerning the inverter unit:
(1) Do not fit capacitors to the output side of the inverter in order to improve the
power ratio.
(2) In case of fitting MC between inverter and motor to control motor operation,
then the capacity of inverter must be 6 times the capacity of motor.
(3) Run a motor that is within the capacity of the inverter unit, light load current and
no-load current will cause the motor to develop ripple current.
(4) This unit is provided with a current limiting function. The starting torque is
assumed to be from 80% to 100%.
B. Concerning the AC motor
(1) When general-purpose motors are operated at low speeds, there is a reduced
cooling effect, please apply the special purpose motor.
(2) Operation at frequencies exceeding 60 Hz requires caution, as there is the
danger of the mechanical strength failure of the motor.
(3) When motors with brakes are being operated, the power for the brake and
inverter should be taken from the same power supply and the brake operation
must be in phase when the unit is started and stopped.
4. Block diagram, wring
A. Wiring of main and control circuit
Wire according to the standard connection diagram. On using the external sequence
control, please use small signal relay or double terminal relay to avoid relay terminal
malfunction.
B. Signal circuit
The signal circuit uses either shielded pairs or twisted pairs, should be wired either
using a wiring duct separated from that for the power circuit, or with the wiring
conduit isolated as much as possible.
C. Connecting the power supply and the AC motor
Connect the main circuit, by wiring according to the main circuit terminal connection
diagram. Care is required not to make a mistake when connecting the input and
output terminals, lest it will cause inverter damage. Specifications of main circuit path
and NFB are as follow:
Voltage (V)
Model
NFB (A) Wire size for
circuit (mm
2
)
CT2002ES-A75
10
2.0
CT2002ES-1A5
15
2.0
CT2002ES-2A2
20
2.0
CT2002ES-3A7
30
3.5
220
CT2004ES-1A5
10
2.0
CT2004ES-2A2
10
2.0
CT2004ES-3A7
15
3.5
380
/
460
Содержание CT-2000ES
Страница 7: ...7 G Control circuit...
