Veichi SI23 - 1.3 Cautions in Using; 1.4 Technical Specification

SI23 Solar Pump VFD Manual
4
1.3 Cautions in Using
1. In application of this series frequency VFD, you have to confirm all machine insulation to prevent damage to the equipment.
Moreover, when the motor working in tough environment, please periodic inspect the electrical insulation to ensure the
safety of the system work.
2. If the motor adapter is not consistent with frequency VFD's rating current (The rating current of the motor is far smaller
than that of frequency VFD), please adjust the protective value to ensure safe running.
3. In occasions such as load raises, usually there is negative torque and frequency VFD breaks off for over-current or
over-voltage. In this case, you should consider choosing the matching brake unit.
4. Frequency VFD, in a certain output frequency range, can meet the mechanical resonance of the load equipment. To avoid
it, you can set up jumping frequency.
5. As output voltage of the VFD is pulse-wave type, if there is capacity which can improve power factor or pressure-sensitive
resistance which used for thunder-proof in the voltage output side, the frequency VFD will break off or its parts will be
damaged, so it is necessary to dismantle them. Moreover, it is proposed not install switch parts like air switch and
contactor (if it is necessary to install switch on output side, please make sure the output electricity of frequency VFD is
zero when the switch is working).
6. At over 1,000 meters altitude, the VFD’s heat dissipation function worsened due to the thin air, it is necessary to use less.
7. The VFD output voltage is pulse wave type. If using digital multi-meter measurement, deviation of the reading will be great.
And the deviation is different by using different type of digital multi-meter. Under normal circumstances, while RMS 380V,
digital multi-meter reading is around 450V.
8. Solar panel can be connected in the series or parallel. For rated voltage 380V controller, we suggest working voltage
between 480V and 560V while MPPT. What means the solar panel open circuit voltage should be between 600V and
700V.
1.4 Technical Specification
Solar pump VFD specification
Items
specifications
Power
input
Voltage,
frequency
DC Input: D5:250VDC～800VDC
Output
Output voltage
Output under rated condition: 3 phase, 0Vac～380Vac, deviation<10%
Output frequency
range
G/P type: rated output frequency 50Hz (0~600Hz frequency conversion)
Output frequency
accuracy
Max frequency ± 0.5%
Overload capacity
G type: 150% rated current/1 min, 180% rated current/10s, 200% rated current/0.5s
P type: 120% rated current/1 min, 140% rated current/10s, 150% rated current/0.5s
Main
control
performance
Motor type
Three-phase asynchronous motor; Permanent magnet synchronous motor (sine
wave)
Control mode
V/F control, Open loop vector control, Closed loop vector control
Modulation
Optimizing Space Voltage Vector PWM Modulation
Carrier frequency
1.0kHz～16.0kHz