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https://www.mktester.com/high-voltage-tester/vlf-hipot-tester/very-low-frequency-high-voltage-generator.html Products Introduction： Very Low Frequency high voltage generator 30KV combines advanced technologies such as modern digital conversion, full computer control, automatic voltage increase, voltage reduction, measurement and protection. In the automatic upgrade process, human intervention can be taken care of. The main advantages include full electronics, small size, light weight, large-screen LCD display (clear and intuitive), printer output test report, and easy use. Technical Parameter： 1、output frequency ：0.1Hz、0.05Hz、0.02Hz、0.01Hz。 2、loading capability : Table 1 for reference 0.1 Hz maximum 1.1µF 0.05 Hz maximum 2.2µF 0.02 Hz maximum 5.5µF 0.01 Hz maximum 11.0µF 3、accuracy :± (3% of full scale +0.5 KV) 4、voltage waveform distortion ：≤5% 5、condition of use : indoor, outdoor; temperature : -10℃∽+40℃；humidity ：≤85%RH 6、power supply ：AC50 Hz，220V ±5% 7、power fuse : output rated voltage ：Table for reference Very Low Frequency high voltage generator 30KV Model Rated Voltages Load capacity Fuse Weight Useful VLF-30 30kV (peak ) 0.1Hz,≤1.1µF 10A Control ：6㎏ Body Boost ：30㎏ 10KV Cables、Generator 0.05Hz,≤2.2µF 0.02Hz,≤5.5µF 0.01Hz,≤11.0µF The following characteristics need to be pointed out： Data of current and voltage are obtained directly through the sampling of high-pressure side and it is true and accurate. Over-voltage protection: the instrument will shut down to protection within 20 ms when the output voltage is exceeding limiting values of setting. Q&A: How to choose the voltage level of the ultra-low frequency high voltage generator when doing the cable withstand voltage test? "Ultra-low frequency high voltage generator" is mainly used for non-destructive insulation withstand voltage test of wires and cables. There are many domestic manufacturers of "Ultra low frequency high voltage generator", and different equipment is selected according to different cables. ① Rated output voltage: 30KV ②. Output frequency: 0.1Hz, 0.05Hz, 0.02Hz, 0.01Hz. ③, carrying capacity: 0.1 Hz maximum 1.1µF (theoretical value, field cable length is 3-8 kilometers) 0.05 Hz maximum 2.2µF (theoretical value, field cable length is 3-8 kilometers) 0.02 Hz maximum 5.5µF (theoretical value, field cable length is 3-8 kilometers) 0.01 Hz maximum 11.0µF (theoretical value, the field cable length is more than 10 kilometers)