VLF Very Low Frequency Tester

Features
1) Data of current and voltage are obtained directly through the sampling of high-pressure side and it is true and accurate.
2) Over-voltage protection: the instrument will shut down to protection within 20 ms when the output voltage is exceeding limiting values of setting.
3) Over-current protection: design for dual protection of high and low voltage, downtime protection can be accurately set in high-pressure side. it will be shut down for protection and the action time is less than 20 ms when the current of low-voltage sides exceeds reacted current.
4) High-voltage output protection resistor design in the body boost and it is no need to additional outside resistor.
5) Closed-loop negative feedback control circuit of high and low voltage.