(1) Input voltage protection: when the input power supply undervoltage, imbalance or lack of phase, the corresponding protection circuit action in the control box, cut off the high voltage output, and the screen display alarm.
(2) Overvoltage protection: can be adjusted, when the output voltage value of the complete set of devices reaches the protection setting value, the output is automatically cut off, and the alarm is displayed on the screen.
(3) Short-circuit (overcurrent) protection: when the inverter output short-circuit or output current reaches the protection setting value, the output can be automatically cut off, and the alarm on the screen.
(4) Breakdown flashover protection: When the high voltage side occurs discharge or flashover to the ground, the output can be automatically cut off.
(5) Zero protection: the voltage boost must be zero, otherwise the output will not start.
(6) Power failure protection: When the input power is suddenly cut off, the system uses the remaining power in the circuit to turn off the output signal in time to ensure the safe shutdown of the system.
(7) overtemperature protection: the inlet and outlet air temperature is displayed on the screen in real time, and the data is processed by the MCU according to the different ambient temperature, such as the overtemperature of the inverter cabinet, an alarm message will be issued.
(8) Cooling fan linkage protection: When the fan cannot operate due to failure, the inverter power supply can not start or automatically cut off the output. At the same time, it has the automatic phase sequence identification function of the fan power supply, without phase commutation.
(9) Output voltage limit function protection: when the high voltage is set, in the test, when the wrong operation to increase the voltage or abnormal situation occurs, ensure that the output voltage will not exceed the set high voltage.
(10) Phase loss protection: When the input power is out of phase and cannot work normally, the screen displays phase loss and closes the system at the same time.
(11) overload protection: When the output current exceeds the setting current, the control box will automatically turn off the output of the inverter power supply, and the corresponding prompt will be given at this time.

(1) Frequency conversion power supply has the ability to resist electric field interference, and the measurement accuracy and control protection meet the requirements under strong electric field interference. with
There are good magnetic shielding, components, leads are shielded by high permeability magnetic materials, no space radiation.
(2) With perfect protection function
Input voltage protection, overvoltage protection, short circuit (overcurrent) protection, breakdown flashover protection, zero protection, power curve protection, power failure protection, overtemperature protection, cooling fan linkage protection, output voltage limit protection.
(3) The frequency conversion power supply adopts the principle of high-fidelity linear power amplification, there is no high order harmonics caused by IGBT switching circuit, to ensure the sine wave output and low electronic interference signal, and to ensure the low office output (≤10pC).
(4) Frequency conversion power supply is equipped with special leads and plugs to connect with other equipment and special ground wire groups.
(5) Intelligent screen display frequency conversion power control box

(1) Input power supply: three-phase 380V±10%, 50Hz
(2) Rated output power: 300kW
(3) Rated output voltage: single-phase 0 ~ 350V, continuously adjustable
(4) Rated output current: 857A
(5) Output waveform: standard sine wave
(6) Waveform distortion rate: ≤1.0%
(7) Output voltage instability: ≤1.0%
(8) Output frequency: 30 ~ 300Hz
(9) Cooling method: forced air cooling
(10) Frequency adjustment resolution: 0.1Hz
(11) Output frequency instability: ≤0.1%
(12) Insulation level: input and output terminals to ground ≥2kV/AC/1min
(13) Allowable running time: The allowable running time under the rated capacity is ≥180min
(14) Noise level: ≤65dB
(15) Local discharge: rated voltage and rated current ≤10pC