KE300A Inverter Parameter Description
155
B
A
FU2
FU1
FR3
FR2
FR1
KM3
KM2
KM1
KA3
KA2
KA1
KA3
KA2
KA1
COM
HD0
T2C
T2A
T1C
Power
frequency
pump 3#
Power
frequency
pump 2#
Power
frequency
pump 1#
24V
T1A
Power
supply
Inverter
Figure 6-32 Constant pressure water supply electrical schematic diagram
When the inverter running frequency reaches the upper limit frequency and after a certain delay, the T1
relay closes the output, the KM1 contactor closes, and the 1# power frequency pump starts and runs at the
power frequency directly. If the pressure is not enough, the inverter running frequency continues to reach
the upper limit frequency, and the cycle starts 2# and 3# power frequency pumps.
When the inverter running frequency reaches the lower limit frequency and after a certain delay, the
corresponding last started power frequency pump stops working, and the principle is first start and then
stop.
A9-07
Double-speed over-current stall action
current compensation coefficient
Factory default
40%
Setting range
40%
~
200%
In the high frequency region, the motor driving current is smaller, when below the rated frequency, and with
the same stall current, the speed of motor drops greatly. In order to improve the operating characteristics of
the motor, the stall action current above the rated frequency can be reduced. In some applications like
centrifuge, the operating frequency is high, requiring several times of weak magnetic field and large load
inertia, this method has a good effect on the acceleration performance.
Over-current stall action current when exceeding the rated frequency = (fs / fn) * k * LimitCur;
fs is the running frequency, fn is the motor rated frequency, k is A9-07 " double-speed over-current stall
action current compensation coefficient ", and LimitCur is P9-06 " over-current stall action current”.